---
_id: '11931'
abstract:
- lang: eng
text: Clustering is one of the most fundamental problems in unsupervised learning
with a large number of applications. However, classical clustering algorithms
assume that the data is static, thus failing to capture many real-world applications
where data is constantly changing and evolving. Driven by this, we study the metric
k-center clustering problem in the fully dynamic setting, where the goal is to
efficiently maintain a clustering while supporting an intermixed sequence of insertions
and deletions of points. This model also supports queries of the form (1) report
whether a given point is a center or (2) determine the cluster a point is assigned
to. We present a deterministic dynamic algorithm for the k-center clustering problem
that provably achieves a (2 + ∊)-approximation in nearly logarithmic update and
query time, if the underlying metric has bounded doubling dimension, its aspect
ratio is bounded by a polynomial and ∊ is a constant. An important feature of
our algorithm is that the update and query times are independent of k. We confirm
the practical relevance of this feature via an extensive experimental study which
shows that for large values of k, our algorithmic construction outperforms the
state-of-the-art algorithm in terms of solution quality and running time.
article_processing_charge: No
author:
- first_name: Gramoz
full_name: Goranci, Gramoz
last_name: Goranci
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Dariusz
full_name: Leniowski, Dariusz
last_name: Leniowski
- first_name: Christian
full_name: Schulz, Christian
last_name: Schulz
- first_name: Alexander
full_name: Svozil, Alexander
last_name: Svozil
citation:
ama: 'Goranci G, Henzinger MH, Leniowski D, Schulz C, Svozil A. Fully dynamic k-center
clustering in low dimensional metrics. In: 2021 Proceedings of the Workshop
on Algorithm Engineering and Experiments. Society for Industrial and Applied
Mathematics; 2021:143-153. doi:10.1137/1.9781611976472.11'
apa: 'Goranci, G., Henzinger, M. H., Leniowski, D., Schulz, C., & Svozil, A.
(2021). Fully dynamic k-center clustering in low dimensional metrics. In 2021
Proceedings of the Workshop on Algorithm Engineering and Experiments (pp.
143–153). Alexandria, VA, United States: Society for Industrial and Applied Mathematics.
https://doi.org/10.1137/1.9781611976472.11'
chicago: Goranci, Gramoz, Monika H Henzinger, Dariusz Leniowski, Christian Schulz,
and Alexander Svozil. “Fully Dynamic K-Center Clustering in Low Dimensional Metrics.”
In 2021 Proceedings of the Workshop on Algorithm Engineering and Experiments,
143–53. Society for Industrial and Applied Mathematics, 2021. https://doi.org/10.1137/1.9781611976472.11.
ieee: G. Goranci, M. H. Henzinger, D. Leniowski, C. Schulz, and A. Svozil, “Fully
dynamic k-center clustering in low dimensional metrics,” in 2021 Proceedings
of the Workshop on Algorithm Engineering and Experiments, Alexandria, VA,
United States, 2021, pp. 143–153.
ista: 'Goranci G, Henzinger MH, Leniowski D, Schulz C, Svozil A. 2021. Fully dynamic
k-center clustering in low dimensional metrics. 2021 Proceedings of the Workshop
on Algorithm Engineering and Experiments. ALENEX: Symposium on Algorithm Engineering
and Experiments, 143–153.'
mla: Goranci, Gramoz, et al. “Fully Dynamic K-Center Clustering in Low Dimensional
Metrics.” 2021 Proceedings of the Workshop on Algorithm Engineering and Experiments,
Society for Industrial and Applied Mathematics, 2021, pp. 143–53, doi:10.1137/1.9781611976472.11.
short: G. Goranci, M.H. Henzinger, D. Leniowski, C. Schulz, A. Svozil, in:, 2021
Proceedings of the Workshop on Algorithm Engineering and Experiments, Society
for Industrial and Applied Mathematics, 2021, pp. 143–153.
conference:
end_date: 2021-01-11
location: Alexandria, VA, United States
name: 'ALENEX: Symposium on Algorithm Engineering and Experiments'
start_date: 2021-01-10
date_created: 2022-08-19T07:33:37Z
date_published: 2021-01-01T00:00:00Z
date_updated: 2023-02-17T13:58:51Z
day: '01'
doi: 10.1137/1.9781611976472.11
extern: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1137/1.9781611976472.11
month: '01'
oa: 1
oa_version: Published Version
page: 143 -153
publication: 2021 Proceedings of the Workshop on Algorithm Engineering and Experiments
publication_identifier:
eisbn:
- 978-1-61197-647-2
issn:
- 2164-0300
publication_status: published
publisher: Society for Industrial and Applied Mathematics
quality_controlled: '1'
scopus_import: '1'
status: public
title: Fully dynamic k-center clustering in low dimensional metrics
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '11956'
abstract:
- lang: eng
text: Controlling the selectivity of a chemical reaction with external stimuli is
common in thermal processes, but rare in visible-light photocatalysis. Here we
show that the redox potential of a carbon nitride photocatalyst (CN-OA-m) can
be tuned by changing the irradiation wavelength to generate electron holes with
different oxidation potentials. This tuning was the key to realizing photo-chemo-enzymatic
cascades that give either the (S)- or the (R)-enantiomer of phenylethanol. In
combination with an unspecific peroxygenase from Agrocybe aegerita, green light
irradiation of CN-OA-m led to the enantioselective hydroxylation of ethylbenzene
to (R)-1-phenylethanol (99 % ee). In contrast, blue light irradiation triggered
the photocatalytic oxidation of ethylbenzene to acetophenone, which in turn was
enantioselectively reduced with an alcohol dehydrogenase from Rhodococcus ruber
to form (S)-1-phenylethanol (93 % ee).
article_processing_charge: No
article_type: original
author:
- first_name: Luca
full_name: Schmermund, Luca
last_name: Schmermund
- first_name: Susanne
full_name: Reischauer, Susanne
last_name: Reischauer
- first_name: Sarah
full_name: Bierbaumer, Sarah
last_name: Bierbaumer
- first_name: Christoph K.
full_name: Winkler, Christoph K.
last_name: Winkler
- first_name: Alba
full_name: Diaz‐Rodriguez, Alba
last_name: Diaz‐Rodriguez
- first_name: Lee J.
full_name: Edwards, Lee J.
last_name: Edwards
- first_name: Selin
full_name: Kara, Selin
last_name: Kara
- first_name: Tamara
full_name: Mielke, Tamara
last_name: Mielke
- first_name: Jared
full_name: Cartwright, Jared
last_name: Cartwright
- first_name: Gideon
full_name: Grogan, Gideon
last_name: Grogan
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Wolfgang
full_name: Kroutil, Wolfgang
last_name: Kroutil
citation:
ama: Schmermund L, Reischauer S, Bierbaumer S, et al. Chromoselective photocatalysis
enables stereocomplementary biocatalytic pathways. Angewandte Chemie International
Edition. 2021;60(13):6965-6969. doi:10.1002/anie.202100164
apa: Schmermund, L., Reischauer, S., Bierbaumer, S., Winkler, C. K., Diaz‐Rodriguez,
A., Edwards, L. J., … Kroutil, W. (2021). Chromoselective photocatalysis enables
stereocomplementary biocatalytic pathways. Angewandte Chemie International
Edition. Wiley. https://doi.org/10.1002/anie.202100164
chicago: Schmermund, Luca, Susanne Reischauer, Sarah Bierbaumer, Christoph K. Winkler,
Alba Diaz‐Rodriguez, Lee J. Edwards, Selin Kara, et al. “Chromoselective Photocatalysis
Enables Stereocomplementary Biocatalytic Pathways.” Angewandte Chemie International
Edition. Wiley, 2021. https://doi.org/10.1002/anie.202100164.
ieee: L. Schmermund et al., “Chromoselective photocatalysis enables stereocomplementary
biocatalytic pathways,” Angewandte Chemie International Edition, vol. 60,
no. 13. Wiley, pp. 6965–6969, 2021.
ista: Schmermund L, Reischauer S, Bierbaumer S, Winkler CK, Diaz‐Rodriguez A, Edwards
LJ, Kara S, Mielke T, Cartwright J, Grogan G, Pieber B, Kroutil W. 2021. Chromoselective
photocatalysis enables stereocomplementary biocatalytic pathways. Angewandte Chemie
International Edition. 60(13), 6965–6969.
mla: Schmermund, Luca, et al. “Chromoselective Photocatalysis Enables Stereocomplementary
Biocatalytic Pathways.” Angewandte Chemie International Edition, vol. 60,
no. 13, Wiley, 2021, pp. 6965–69, doi:10.1002/anie.202100164.
short: L. Schmermund, S. Reischauer, S. Bierbaumer, C.K. Winkler, A. Diaz‐Rodriguez,
L.J. Edwards, S. Kara, T. Mielke, J. Cartwright, G. Grogan, B. Pieber, W. Kroutil,
Angewandte Chemie International Edition 60 (2021) 6965–6969.
date_created: 2022-08-24T10:47:16Z
date_published: 2021-03-22T00:00:00Z
date_updated: 2023-02-21T10:09:14Z
day: '22'
doi: 10.1002/anie.202100164
extern: '1'
intvolume: ' 60'
issue: '13'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1002/anie.202100164
month: '03'
oa: 1
oa_version: Published Version
page: 6965-6969
publication: Angewandte Chemie International Edition
publication_identifier:
eissn:
- 1521-3773
issn:
- 1433-7851
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Chromoselective photocatalysis enables stereocomplementary biocatalytic pathways
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 60
year: '2021'
...
---
_id: '11965'
abstract:
- lang: eng
text: Metallaphotocatalytic cross-coupling reactions are typically carried out by
combining homogeneous or heterogeneous photocatalysts with a soluble nickel complex.
Previous attempts to realize recyclable catalytic systems use immobilized iridium
complexes to harvest light. We present bifunctional materials based on semiconductors
for metallaphotocatalytic C−S cross-coupling reactions that can be reused without
losing their catalytic activity. Key to the success is the permanent immobilization
of a nickel complex on the surface of a heterogeneous semiconductor through phosphonic
acid anchors. The optimized catalyst harvests a broad range of the visible light
spectrum and requires a nickel loading of only ∼0.1 mol %.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Susanne
full_name: Reischauer, Susanne
last_name: Reischauer
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
citation:
ama: Reischauer S, Pieber B. Recyclable, bifunctional metallaphotocatalysts for
C−S cross‐coupling reactions. ChemPhotoChem. 2021;5(8):716-720. doi:10.1002/cptc.202100062
apa: Reischauer, S., & Pieber, B. (2021). Recyclable, bifunctional metallaphotocatalysts
for C−S cross‐coupling reactions. ChemPhotoChem. Wiley. https://doi.org/10.1002/cptc.202100062
chicago: Reischauer, Susanne, and Bartholomäus Pieber. “Recyclable, Bifunctional
Metallaphotocatalysts for C−S Cross‐coupling Reactions.” ChemPhotoChem.
Wiley, 2021. https://doi.org/10.1002/cptc.202100062.
ieee: S. Reischauer and B. Pieber, “Recyclable, bifunctional metallaphotocatalysts
for C−S cross‐coupling reactions,” ChemPhotoChem, vol. 5, no. 8. Wiley,
pp. 716–720, 2021.
ista: Reischauer S, Pieber B. 2021. Recyclable, bifunctional metallaphotocatalysts
for C−S cross‐coupling reactions. ChemPhotoChem. 5(8), 716–720.
mla: Reischauer, Susanne, and Bartholomäus Pieber. “Recyclable, Bifunctional Metallaphotocatalysts
for C−S Cross‐coupling Reactions.” ChemPhotoChem, vol. 5, no. 8, Wiley,
2021, pp. 716–20, doi:10.1002/cptc.202100062.
short: S. Reischauer, B. Pieber, ChemPhotoChem 5 (2021) 716–720.
date_created: 2022-08-25T08:31:11Z
date_published: 2021-08-01T00:00:00Z
date_updated: 2023-02-21T10:09:37Z
day: '01'
doi: 10.1002/cptc.202100062
extern: '1'
intvolume: ' 5'
issue: '8'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1002/cptc.202100062
month: '08'
oa: 1
oa_version: Published Version
page: 716-720
publication: ChemPhotoChem
publication_identifier:
eissn:
- 2367-0932
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Recyclable, bifunctional metallaphotocatalysts for C−S cross‐coupling reactions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2021'
...
---
_id: '11972'
abstract:
- lang: eng
text: Carbon dots have been previosly immobilized on titanium dioxide to generate
photocatalysts for pollutant degradation and water splitting. Here we demonstrate
that these nanocomposites are valuable photocatalysts for metallaphotocatalytic
carbon–heteroatom cross-couplings. These sustainable materials show a large applicability,
high photostability, excellent reusability, and broadly absorb across the visible-light
spectrum.
article_processing_charge: No
article_type: original
author:
- first_name: Zhouxiang
full_name: Zhao, Zhouxiang
last_name: Zhao
- first_name: Susanne
full_name: Reischauer, Susanne
last_name: Reischauer
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Martina
full_name: Delbianco, Martina
last_name: Delbianco
citation:
ama: Zhao Z, Reischauer S, Pieber B, Delbianco M. Carbon dot/TiO₂ nanocomposites
as photocatalysts for metallaphotocatalytic carbon-heteroatom cross-couplings.
Green Chemistry. 2021;23(12):4524-4530. doi:10.1039/d1gc01284c
apa: Zhao, Z., Reischauer, S., Pieber, B., & Delbianco, M. (2021). Carbon dot/TiO₂
nanocomposites as photocatalysts for metallaphotocatalytic carbon-heteroatom cross-couplings.
Green Chemistry. Royal Society of Chemistry. https://doi.org/10.1039/d1gc01284c
chicago: Zhao, Zhouxiang, Susanne Reischauer, Bartholomäus Pieber, and Martina Delbianco.
“Carbon Dot/TiO₂ Nanocomposites as Photocatalysts for Metallaphotocatalytic Carbon-Heteroatom
Cross-Couplings.” Green Chemistry. Royal Society of Chemistry, 2021. https://doi.org/10.1039/d1gc01284c.
ieee: Z. Zhao, S. Reischauer, B. Pieber, and M. Delbianco, “Carbon dot/TiO₂ nanocomposites
as photocatalysts for metallaphotocatalytic carbon-heteroatom cross-couplings,”
Green Chemistry, vol. 23, no. 12. Royal Society of Chemistry, pp. 4524–4530,
2021.
ista: Zhao Z, Reischauer S, Pieber B, Delbianco M. 2021. Carbon dot/TiO₂ nanocomposites
as photocatalysts for metallaphotocatalytic carbon-heteroatom cross-couplings.
Green Chemistry. 23(12), 4524–4530.
mla: Zhao, Zhouxiang, et al. “Carbon Dot/TiO₂ Nanocomposites as Photocatalysts for
Metallaphotocatalytic Carbon-Heteroatom Cross-Couplings.” Green Chemistry,
vol. 23, no. 12, Royal Society of Chemistry, 2021, pp. 4524–30, doi:10.1039/d1gc01284c.
short: Z. Zhao, S. Reischauer, B. Pieber, M. Delbianco, Green Chemistry 23 (2021)
4524–4530.
date_created: 2022-08-25T10:25:46Z
date_published: 2021-06-21T00:00:00Z
date_updated: 2023-02-21T10:09:52Z
day: '21'
doi: 10.1039/d1gc01284c
extern: '1'
intvolume: ' 23'
issue: '12'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1039/D1GC01284C
month: '06'
oa: 1
oa_version: Published Version
page: 4524-4530
publication: Green Chemistry
publication_identifier:
eissn:
- 1463-9270
issn:
- 1463-9262
publication_status: published
publisher: Royal Society of Chemistry
quality_controlled: '1'
scopus_import: '1'
status: public
title: Carbon dot/TiO₂ nanocomposites as photocatalysts for metallaphotocatalytic
carbon-heteroatom cross-couplings
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 23
year: '2021'
...
---
_id: '11974'
abstract:
- lang: eng
text: Visible light photocatalysis has become a powerful tool in organic synthesis
that uses photons as traceless, sustainable reagents. Most of the activities in
the field focus on the development of new reactions via common photoredox cycles,
but recently a number of exciting new concepts and strategies entered less charted
territories. We survey approaches that enable the use of longer wavelengths and
show that the wavelength and intensity of photons are import parameters that enable
tuning of the reactivity of a photocatalyst to control or change the selectivity
of chemical reactions. In addition, we discuss recent efforts to substitute strong
reductants, such as elemental lithium and sodium, by light and technological advances
in the field.
article_number: '102209'
article_processing_charge: No
article_type: review
author:
- first_name: Susanne
full_name: Reischauer, Susanne
last_name: Reischauer
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
citation:
ama: Reischauer S, Pieber B. Emerging concepts in photocatalytic organic synthesis.
iScience. 2021;24(3). doi:10.1016/j.isci.2021.102209
apa: Reischauer, S., & Pieber, B. (2021). Emerging concepts in photocatalytic
organic synthesis. IScience. Elsevier. https://doi.org/10.1016/j.isci.2021.102209
chicago: Reischauer, Susanne, and Bartholomäus Pieber. “Emerging Concepts in Photocatalytic
Organic Synthesis.” IScience. Elsevier, 2021. https://doi.org/10.1016/j.isci.2021.102209.
ieee: S. Reischauer and B. Pieber, “Emerging concepts in photocatalytic organic
synthesis,” iScience, vol. 24, no. 3. Elsevier, 2021.
ista: Reischauer S, Pieber B. 2021. Emerging concepts in photocatalytic organic
synthesis. iScience. 24(3), 102209.
mla: Reischauer, Susanne, and Bartholomäus Pieber. “Emerging Concepts in Photocatalytic
Organic Synthesis.” IScience, vol. 24, no. 3, 102209, Elsevier, 2021, doi:10.1016/j.isci.2021.102209.
short: S. Reischauer, B. Pieber, IScience 24 (2021).
date_created: 2022-08-25T10:31:44Z
date_published: 2021-03-19T00:00:00Z
date_updated: 2023-02-21T10:09:57Z
day: '19'
doi: 10.1016/j.isci.2021.102209
extern: '1'
intvolume: ' 24'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.isci.2021.102209
month: '03'
oa: 1
oa_version: Published Version
publication: iScience
publication_identifier:
eissn:
- 2589-0042
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Emerging concepts in photocatalytic organic synthesis
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 24
year: '2021'
...
---
_id: '11981'
abstract:
- lang: eng
text: The cleavage of benzyl ethers by catalytic hydrogenolysis or Birch reduction
suffers from poor functional group compatibility and limits their use as a protecting
group. The visible-light-mediated debenzylation disclosed here renders benzyl
ethers temporary protective groups, enabling new orthogonal protection strategies.
Using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as a stoichiometric or catalytic
photooxidant, benzyl ethers can be cleaved in the presence of azides, alkenes,
and alkynes. The reaction time can be reduced from hours to minutes in continuous
flow.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Cristian
full_name: Cavedon, Cristian
last_name: Cavedon
- first_name: Eric T.
full_name: Sletten, Eric T.
last_name: Sletten
- first_name: Amiera
full_name: Madani, Amiera
last_name: Madani
- first_name: Olaf
full_name: Niemeyer, Olaf
last_name: Niemeyer
- first_name: Peter H.
full_name: Seeberger, Peter H.
last_name: Seeberger
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
citation:
ama: Cavedon C, Sletten ET, Madani A, Niemeyer O, Seeberger PH, Pieber B. Visible-light-mediated
oxidative debenzylation enables the use of benzyl ethers as temporary protecting
groups. Organic Letters. 2021;23(2):514-518. doi:10.1021/acs.orglett.0c04026
apa: Cavedon, C., Sletten, E. T., Madani, A., Niemeyer, O., Seeberger, P. H., &
Pieber, B. (2021). Visible-light-mediated oxidative debenzylation enables the
use of benzyl ethers as temporary protecting groups. Organic Letters. American
Chemical Society. https://doi.org/10.1021/acs.orglett.0c04026
chicago: Cavedon, Cristian, Eric T. Sletten, Amiera Madani, Olaf Niemeyer, Peter
H. Seeberger, and Bartholomäus Pieber. “Visible-Light-Mediated Oxidative Debenzylation
Enables the Use of Benzyl Ethers as Temporary Protecting Groups.” Organic Letters.
American Chemical Society, 2021. https://doi.org/10.1021/acs.orglett.0c04026.
ieee: C. Cavedon, E. T. Sletten, A. Madani, O. Niemeyer, P. H. Seeberger, and B.
Pieber, “Visible-light-mediated oxidative debenzylation enables the use of benzyl
ethers as temporary protecting groups,” Organic Letters, vol. 23, no. 2.
American Chemical Society, pp. 514–518, 2021.
ista: Cavedon C, Sletten ET, Madani A, Niemeyer O, Seeberger PH, Pieber B. 2021.
Visible-light-mediated oxidative debenzylation enables the use of benzyl ethers
as temporary protecting groups. Organic Letters. 23(2), 514–518.
mla: Cavedon, Cristian, et al. “Visible-Light-Mediated Oxidative Debenzylation Enables
the Use of Benzyl Ethers as Temporary Protecting Groups.” Organic Letters,
vol. 23, no. 2, American Chemical Society, 2021, pp. 514–18, doi:10.1021/acs.orglett.0c04026.
short: C. Cavedon, E.T. Sletten, A. Madani, O. Niemeyer, P.H. Seeberger, B. Pieber,
Organic Letters 23 (2021) 514–518.
date_created: 2022-08-25T11:13:05Z
date_published: 2021-01-15T00:00:00Z
date_updated: 2023-02-21T10:10:16Z
day: '15'
doi: 10.1021/acs.orglett.0c04026
extern: '1'
external_id:
pmid:
- '33400534'
intvolume: ' 23'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1021/acs.orglett.0c04026
month: '01'
oa: 1
oa_version: Published Version
page: 514-518
pmid: 1
publication: Organic Letters
publication_identifier:
eissn:
- 1523-7052
issn:
- 1523-7060
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Visible-light-mediated oxidative debenzylation enables the use of benzyl ethers
as temporary protecting groups
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 23
year: '2021'
...
---
_id: '12068'
abstract:
- lang: eng
text: Metallaphotocatalysis typically requires a photocatalyst to harness the energy
of visible-light and transfer it to a transition metal catalyst to trigger chemical
reactions. The most prominent example is the merger of photo- and nickel catalysis
that unlocked various cross-couplings. However, the high reactivity of excited
photocatalyst can lead to unwanted side reactions thus limiting this approach.
Here we show that a bipyridine ligand that is subtly decorated with two carbazole
groups forms a nickel complex that absorbs visible-light and promotes several
carbon–heteroatom cross-couplings in the absence of an exogenous photocatalysts.
The ligand can be polymerized in a simple one-step procedure to afford a porous
organic polymer that can be used for heterogeneous nickel catalysis in the same
reactions. The material can be easily recovered and reused multiple times maintaining
high catalytic activity and selectivity.
article_processing_charge: No
author:
- first_name: Cristian
full_name: Cavedon, Cristian
last_name: Cavedon
- first_name: Sebastian
full_name: Gisbertz, Sebastian
last_name: Gisbertz
- first_name: Sarah
full_name: Vogl, Sarah
last_name: Vogl
- first_name: Noah
full_name: Richter, Noah
last_name: Richter
- first_name: Stefanie
full_name: Schrottke, Stefanie
last_name: Schrottke
- first_name: Christian
full_name: Teutloff, Christian
last_name: Teutloff
- first_name: Peter H.
full_name: Seeberger, Peter H.
last_name: Seeberger
- first_name: Arne
full_name: Thomas, Arne
last_name: Thomas
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
citation:
ama: Cavedon C, Gisbertz S, Vogl S, et al. Photocatalyst-free, visible-light-mediated
nickel catalyzed carbon–heteroatom cross-couplings. doi:10.26434/chemrxiv-2021-kt2wr
apa: Cavedon, C., Gisbertz, S., Vogl, S., Richter, N., Schrottke, S., Teutloff,
C., … Pieber, B. (n.d.). Photocatalyst-free, visible-light-mediated nickel catalyzed
carbon–heteroatom cross-couplings. ChemRxiv. https://doi.org/10.26434/chemrxiv-2021-kt2wr
chicago: Cavedon, Cristian, Sebastian Gisbertz, Sarah Vogl, Noah Richter, Stefanie
Schrottke, Christian Teutloff, Peter H. Seeberger, Arne Thomas, and Bartholomäus
Pieber. “Photocatalyst-Free, Visible-Light-Mediated Nickel Catalyzed Carbon–Heteroatom
Cross-Couplings.” ChemRxiv, n.d. https://doi.org/10.26434/chemrxiv-2021-kt2wr.
ieee: C. Cavedon et al., “Photocatalyst-free, visible-light-mediated nickel
catalyzed carbon–heteroatom cross-couplings.” ChemRxiv.
ista: Cavedon C, Gisbertz S, Vogl S, Richter N, Schrottke S, Teutloff C, Seeberger
PH, Thomas A, Pieber B. Photocatalyst-free, visible-light-mediated nickel catalyzed
carbon–heteroatom cross-couplings. 10.26434/chemrxiv-2021-kt2wr.
mla: Cavedon, Cristian, et al. Photocatalyst-Free, Visible-Light-Mediated Nickel
Catalyzed Carbon–Heteroatom Cross-Couplings. ChemRxiv, doi:10.26434/chemrxiv-2021-kt2wr.
short: C. Cavedon, S. Gisbertz, S. Vogl, N. Richter, S. Schrottke, C. Teutloff,
P.H. Seeberger, A. Thomas, B. Pieber, (n.d.).
date_created: 2022-09-08T11:42:02Z
date_published: 2021-08-04T00:00:00Z
date_updated: 2022-09-08T11:44:01Z
day: '04'
doi: 10.26434/chemrxiv-2021-kt2wr
extern: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.26434/chemrxiv-2021-kt2wr
month: '08'
oa: 1
oa_version: Preprint
publication_status: submitted
publisher: ChemRxiv
status: public
title: Photocatalyst-free, visible-light-mediated nickel catalyzed carbon–heteroatom
cross-couplings
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '12070'
abstract:
- lang: eng
text: Controlling the selectivity of a chemical reaction with external stimuli is
common in thermal processes, but rare in visible-light photocatalysis. Here we
show that the redox potential of a carbon nitride photocatalyst (CN-OA-m) can
be tuned by changing the irradiation wavelength to generate electron holes with
different oxidation potentials. This tuning was the key to realizing photo-chemo-enzymatic
cascades that give either the (S)- or the (R)-enantiomer of phenylethanol. In
combination with an unspecific peroxygenase from Agrocybe aegerita, green light
irradiation of CN-OA-m led to the enantioselective hydroxylation of ethylbenzene
to (R)-1-phenylethanol (99% ee). In contrast, blue light irradiation triggered
the photocatalytic oxidation of ethylbenzene to acetophenone, which in turn was
enantioselectively reduced with an alcohol dehydrogenase from Rhodococcus ruber
to form (S)-1-phenylethanol (93% ee).
article_processing_charge: No
author:
- first_name: Luca
full_name: Schmermund, Luca
last_name: Schmermund
- first_name: Susanne
full_name: Reischauer, Susanne
last_name: Reischauer
- first_name: Sarah
full_name: Bierbaumer, Sarah
last_name: Bierbaumer
- first_name: Christoph
full_name: Winkler, Christoph
last_name: Winkler
- first_name: Alba
full_name: Diaz-Rodriguez, Alba
last_name: Diaz-Rodriguez
- first_name: Lee J.
full_name: Edwards, Lee J.
last_name: Edwards
- first_name: Selin
full_name: Kara, Selin
last_name: Kara
- first_name: Tamara
full_name: Mielke, Tamara
last_name: Mielke
- first_name: Jared
full_name: Cartwright, Jared
last_name: Cartwright
- first_name: Gideon
full_name: Grogan, Gideon
last_name: Grogan
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Wolfgang
full_name: Kroutil, Wolfgang
last_name: Kroutil
citation:
ama: Schmermund L, Reischauer S, Bierbaumer S, et al. Switching between enantiomers
by combining chromoselective photocatalysis and biocatalysis. doi:10.26434/chemrxiv.13521527
apa: Schmermund, L., Reischauer, S., Bierbaumer, S., Winkler, C., Diaz-Rodriguez,
A., Edwards, L. J., … Kroutil, W. (n.d.). Switching between enantiomers by combining
chromoselective photocatalysis and biocatalysis. ChemRxiv. https://doi.org/10.26434/chemrxiv.13521527
chicago: Schmermund, Luca, Susanne Reischauer, Sarah Bierbaumer, Christoph Winkler,
Alba Diaz-Rodriguez, Lee J. Edwards, Selin Kara, et al. “Switching between Enantiomers
by Combining Chromoselective Photocatalysis and Biocatalysis.” ChemRxiv, n.d.
https://doi.org/10.26434/chemrxiv.13521527.
ieee: L. Schmermund et al., “Switching between enantiomers by combining chromoselective
photocatalysis and biocatalysis.” ChemRxiv.
ista: Schmermund L, Reischauer S, Bierbaumer S, Winkler C, Diaz-Rodriguez A, Edwards
LJ, Kara S, Mielke T, Cartwright J, Grogan G, Pieber B, Kroutil W. Switching between
enantiomers by combining chromoselective photocatalysis and biocatalysis. 10.26434/chemrxiv.13521527.
mla: Schmermund, Luca, et al. Switching between Enantiomers by Combining Chromoselective
Photocatalysis and Biocatalysis. ChemRxiv, doi:10.26434/chemrxiv.13521527.
short: L. Schmermund, S. Reischauer, S. Bierbaumer, C. Winkler, A. Diaz-Rodriguez,
L.J. Edwards, S. Kara, T. Mielke, J. Cartwright, G. Grogan, B. Pieber, W. Kroutil,
(n.d.).
date_created: 2022-09-08T11:46:45Z
date_published: 2021-01-06T00:00:00Z
date_updated: 2022-09-08T11:49:16Z
day: '06'
doi: 10.26434/chemrxiv.13521527
extern: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.26434/chemrxiv.13521527
month: '01'
oa: 1
oa_version: Preprint
publication_status: submitted
publisher: ChemRxiv
status: public
title: Switching between enantiomers by combining chromoselective photocatalysis and
biocatalysis
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '12071'
abstract:
- lang: eng
text: Despite many efforts to rationalize the strongly correlated electronic ground
states in doped Mott insulators, the nature of the doping-induced insulator-to-metal
transition is still a subject under intensive investigation. Here, we probe the
nanoscale electronic structure of the Mott insulator Sr₂IrO₄δ with low-temperature
scanning tunneling microscopy and find an enhanced local density of states (LDOS)
inside the Mott gap at the location of individual defects which we interpret as
defects at apical oxygen sites. A chiral behavior in the topography for those
defects has been observed. We also visualize the local enhanced conductance arising
from the overlapping of defect states which induces finite LDOS inside of the
Mott gap. By combining these findings with the typical spatial extension of isolated
defects of about 2 nm, our results indicate that the insulator-to-metal transition
in Sr₂IrO₄−δ could be percolative in nature.
article_number: '023075'
article_processing_charge: No
article_type: original
author:
- first_name: Zhixiang
full_name: Sun, Zhixiang
last_name: Sun
- first_name: Jose M.
full_name: Guevara, Jose M.
last_name: Guevara
- first_name: Steffen
full_name: Sykora, Steffen
last_name: Sykora
- first_name: Ekaterina
full_name: Paerschke, Ekaterina
id: 8275014E-6063-11E9-9B7F-6338E6697425
last_name: Paerschke
orcid: 0000-0003-0853-8182
- first_name: Kaustuv
full_name: Manna, Kaustuv
last_name: Manna
- first_name: Andrey
full_name: Maljuk, Andrey
last_name: Maljuk
- first_name: Sabine
full_name: Wurmehl, Sabine
last_name: Wurmehl
- first_name: Jeroen
full_name: van den Brink, Jeroen
last_name: van den Brink
- first_name: Bernd
full_name: Büchner, Bernd
last_name: Büchner
- first_name: Christian
full_name: Hess, Christian
last_name: Hess
citation:
ama: Sun Z, Guevara JM, Sykora S, et al. Evidence for a percolative Mott insulator-metal
transition in doped Sr₂IrO₄. Physical Review Research. 2021;3(2). doi:10.1103/physrevresearch.3.023075
apa: Sun, Z., Guevara, J. M., Sykora, S., Paerschke, E., Manna, K., Maljuk, A.,
… Hess, C. (2021). Evidence for a percolative Mott insulator-metal transition
in doped Sr₂IrO₄. Physical Review Research. American Physical Society.
https://doi.org/10.1103/physrevresearch.3.023075
chicago: Sun, Zhixiang, Jose M. Guevara, Steffen Sykora, Ekaterina Paerschke, Kaustuv
Manna, Andrey Maljuk, Sabine Wurmehl, Jeroen van den Brink, Bernd Büchner, and
Christian Hess. “Evidence for a Percolative Mott Insulator-Metal Transition in
Doped Sr₂IrO₄.” Physical Review Research. American Physical Society, 2021.
https://doi.org/10.1103/physrevresearch.3.023075.
ieee: Z. Sun et al., “Evidence for a percolative Mott insulator-metal transition
in doped Sr₂IrO₄,” Physical Review Research, vol. 3, no. 2. American Physical
Society, 2021.
ista: Sun Z, Guevara JM, Sykora S, Paerschke E, Manna K, Maljuk A, Wurmehl S, van
den Brink J, Büchner B, Hess C. 2021. Evidence for a percolative Mott insulator-metal
transition in doped Sr₂IrO₄. Physical Review Research. 3(2), 023075.
mla: Sun, Zhixiang, et al. “Evidence for a Percolative Mott Insulator-Metal Transition
in Doped Sr₂IrO₄.” Physical Review Research, vol. 3, no. 2, 023075, American
Physical Society, 2021, doi:10.1103/physrevresearch.3.023075.
short: Z. Sun, J.M. Guevara, S. Sykora, E. Paerschke, K. Manna, A. Maljuk, S. Wurmehl,
J. van den Brink, B. Büchner, C. Hess, Physical Review Research 3 (2021).
date_created: 2022-09-08T15:01:16Z
date_published: 2021-04-27T00:00:00Z
date_updated: 2022-09-09T07:26:01Z
day: '27'
ddc:
- '530'
doi: 10.1103/physrevresearch.3.023075
extern: '1'
file:
- access_level: open_access
checksum: 73f1331b9716295849e87a7d3acd9323
content_type: application/pdf
creator: dernst
date_created: 2022-09-09T07:23:40Z
date_updated: 2022-09-09T07:23:40Z
file_id: '12075'
file_name: 2021_PhysicalRevResearch_Sun.pdf
file_size: 4020901
relation: main_file
success: 1
file_date_updated: 2022-09-09T07:23:40Z
has_accepted_license: '1'
intvolume: ' 3'
issue: '2'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Evidence for a percolative Mott insulator-metal transition in doped Sr₂IrO₄
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 3
year: '2021'
...
---
_id: '12076'
abstract:
- lang: eng
text: We find an asymptotic formula for the number of primitive vectors $(z_1,\ldots,z_4)\in
(\mathbb{Z}_{\neq 0})^4$ such that $z_1,\ldots, z_4$ are all squareful and bounded
by $B$, and $z_1+\cdots + z_4 = 0$. Our result agrees in the power of $B$ and
$\log B$ with the Campana-Manin conjecture of Pieropan, Smeets, Tanimoto and V\'{a}rilly-Alvarado.
article_number: '2104.06966'
article_processing_charge: No
arxiv: 1
author:
- first_name: Alec L
full_name: Shute, Alec L
id: 440EB050-F248-11E8-B48F-1D18A9856A87
last_name: Shute
orcid: 0000-0002-1812-2810
citation:
ama: Shute AL. Sums of four squareful numbers. arXiv. doi:10.48550/arXiv.2104.06966
apa: Shute, A. L. (n.d.). Sums of four squareful numbers. arXiv. https://doi.org/10.48550/arXiv.2104.06966
chicago: Shute, Alec L. “Sums of Four Squareful Numbers.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2104.06966.
ieee: A. L. Shute, “Sums of four squareful numbers,” arXiv. .
ista: Shute AL. Sums of four squareful numbers. arXiv, 2104.06966.
mla: Shute, Alec L. “Sums of Four Squareful Numbers.” ArXiv, 2104.06966,
doi:10.48550/arXiv.2104.06966.
short: A.L. Shute, ArXiv (n.d.).
date_created: 2022-09-09T10:42:51Z
date_published: 2021-04-15T00:00:00Z
date_updated: 2023-02-21T16:37:30Z
day: '15'
department:
- _id: TiBr
doi: 10.48550/arXiv.2104.06966
external_id:
arxiv:
- '2104.06966'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2104.06966
month: '04'
oa: 1
oa_version: Preprint
publication: arXiv
publication_status: submitted
related_material:
record:
- id: '12072'
relation: dissertation_contains
status: public
status: public
title: Sums of four squareful numbers
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '12077'
abstract:
- lang: eng
text: "We compare the Manin-type conjecture for Campana points recently formulated\r\nby
Pieropan, Smeets, Tanimoto and V\\'{a}rilly-Alvarado with an alternative\r\nprediction
of Browning and Van Valckenborgh in the special case of the orbifold\r\n$(\\mathbb{P}^1,D)$,
where $D =\\frac{1}{2}[0]+\\frac{1}{2}[1]+\\frac{1}{2}[\\infty]$. We find that
the two predicted leading constants do not agree, and we discuss whether thin
sets\r\ncould explain this discrepancy. Motivated by this, we provide a counterexample\r\nto
the Manin-type conjecture for Campana points, by considering orbifolds\r\ncorresponding
to squareful values of binary quadratic forms."
acknowledgement: The author would like to thank Damaris Schindler and Florian Wilsch
for their helpful comments on the heights and Tamagawa measures used in Section
3, together with Marta Pieropan, Sho Tanimoto and Sam Streeter for providing valuable
feedback on an earlier version of this paper, and Tim Browning for many useful comments
and discussions during the development of this work. The author is also grateful
to the anonymous referee for providing many valuable comments and suggestions that
improved the quality of the paper.
article_number: '2104.14946'
article_processing_charge: No
arxiv: 1
author:
- first_name: Alec L
full_name: Shute, Alec L
id: 440EB050-F248-11E8-B48F-1D18A9856A87
last_name: Shute
orcid: 0000-0002-1812-2810
citation:
ama: Shute AL. On the leading constant in the Manin-type conjecture for Campana
points. arXiv. doi:10.48550/arXiv.2104.14946
apa: Shute, A. L. (n.d.). On the leading constant in the Manin-type conjecture for
Campana points. arXiv. https://doi.org/10.48550/arXiv.2104.14946
chicago: Shute, Alec L. “On the Leading Constant in the Manin-Type Conjecture for
Campana Points.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2104.14946.
ieee: A. L. Shute, “On the leading constant in the Manin-type conjecture for Campana
points,” arXiv. .
ista: Shute AL. On the leading constant in the Manin-type conjecture for Campana
points. arXiv, 2104.14946.
mla: Shute, Alec L. “On the Leading Constant in the Manin-Type Conjecture for Campana
Points.” ArXiv, 2104.14946, doi:10.48550/arXiv.2104.14946.
short: A.L. Shute, ArXiv (n.d.).
date_created: 2022-09-09T10:43:17Z
date_published: 2021-04-30T00:00:00Z
date_updated: 2023-02-21T16:37:30Z
day: '30'
department:
- _id: TiBr
doi: 10.48550/arXiv.2104.14946
external_id:
arxiv:
- '2104.14946'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2104.14946
month: '04'
oa: 1
oa_version: Preprint
publication: arXiv
publication_status: submitted
related_material:
record:
- id: '12072'
relation: dissertation_contains
status: public
status: public
title: On the leading constant in the Manin-type conjecture for Campana points
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '12308'
abstract:
- lang: eng
text: Let P and Q be two points on an elliptic curve defined over a number field
K. For α∈End(E), define Bα to be the OK-integral ideal generated by the denominator
of x(α(P)+Q). Let O be a subring of End(E), that is a Dedekind domain. We will
study the sequence {Bα}α∈O. We will show that, for all but finitely many α∈O,
the ideal Bα has a primitive divisor when P is a non-torsion point and there exist
two endomorphisms g≠0 and f so that f(P)=g(Q). This is a generalization of previous
results on elliptic divisibility sequences.
article_number: '37'
article_processing_charge: No
article_type: original
author:
- first_name: Matteo
full_name: Verzobio, Matteo
id: 7aa8f170-131e-11ed-88e1-a9efd01027cb
last_name: Verzobio
orcid: 0000-0002-0854-0306
citation:
ama: Verzobio M. Primitive divisors of sequences associated to elliptic curves with
complex multiplication. Research in Number Theory. 2021;7(2). doi:10.1007/s40993-021-00267-9
apa: Verzobio, M. (2021). Primitive divisors of sequences associated to elliptic
curves with complex multiplication. Research in Number Theory. Springer
Nature. https://doi.org/10.1007/s40993-021-00267-9
chicago: Verzobio, Matteo. “Primitive Divisors of Sequences Associated to Elliptic
Curves with Complex Multiplication.” Research in Number Theory. Springer
Nature, 2021. https://doi.org/10.1007/s40993-021-00267-9.
ieee: M. Verzobio, “Primitive divisors of sequences associated to elliptic curves
with complex multiplication,” Research in Number Theory, vol. 7, no. 2.
Springer Nature, 2021.
ista: Verzobio M. 2021. Primitive divisors of sequences associated to elliptic curves
with complex multiplication. Research in Number Theory. 7(2), 37.
mla: Verzobio, Matteo. “Primitive Divisors of Sequences Associated to Elliptic Curves
with Complex Multiplication.” Research in Number Theory, vol. 7, no. 2,
37, Springer Nature, 2021, doi:10.1007/s40993-021-00267-9.
short: M. Verzobio, Research in Number Theory 7 (2021).
date_created: 2023-01-16T11:44:39Z
date_published: 2021-05-20T00:00:00Z
date_updated: 2023-05-08T12:00:17Z
day: '20'
doi: 10.1007/s40993-021-00267-9
extern: '1'
intvolume: ' 7'
issue: '2'
keyword:
- Algebra and Number Theory
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1007/s40993-021-00267-9
month: '05'
oa: 1
oa_version: Published Version
publication: Research in Number Theory
publication_identifier:
issn:
- 2522-0160
- 2363-9555
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Primitive divisors of sequences associated to elliptic curves with complex
multiplication
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 7
year: '2021'
...
---
_id: '12309'
abstract:
- lang: eng
text: Take a rational elliptic curve defined by the equation y2=x3+ax in minimal
form and consider the sequence Bn of the denominators of the abscissas of the
iterate of a non-torsion point. We show that B5m has a primitive divisor for every
m. Then, we show how to generalize this method to the terms of the form Bmp with
p a prime congruent to 1 modulo 4.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Matteo
full_name: Verzobio, Matteo
id: 7aa8f170-131e-11ed-88e1-a9efd01027cb
last_name: Verzobio
orcid: 0000-0002-0854-0306
citation:
ama: Verzobio M. Primitive divisors of elliptic divisibility sequences for elliptic
curves with j=1728. Acta Arithmetica. 2021;198(2):129-168. doi:10.4064/aa191016-30-7
apa: Verzobio, M. (2021). Primitive divisors of elliptic divisibility sequences
for elliptic curves with j=1728. Acta Arithmetica. Institute of Mathematics,
Polish Academy of Sciences. https://doi.org/10.4064/aa191016-30-7
chicago: Verzobio, Matteo. “Primitive Divisors of Elliptic Divisibility Sequences
for Elliptic Curves with J=1728.” Acta Arithmetica. Institute of Mathematics,
Polish Academy of Sciences, 2021. https://doi.org/10.4064/aa191016-30-7.
ieee: M. Verzobio, “Primitive divisors of elliptic divisibility sequences for elliptic
curves with j=1728,” Acta Arithmetica, vol. 198, no. 2. Institute of Mathematics,
Polish Academy of Sciences, pp. 129–168, 2021.
ista: Verzobio M. 2021. Primitive divisors of elliptic divisibility sequences for
elliptic curves with j=1728. Acta Arithmetica. 198(2), 129–168.
mla: Verzobio, Matteo. “Primitive Divisors of Elliptic Divisibility Sequences for
Elliptic Curves with J=1728.” Acta Arithmetica, vol. 198, no. 2, Institute
of Mathematics, Polish Academy of Sciences, 2021, pp. 129–68, doi:10.4064/aa191016-30-7.
short: M. Verzobio, Acta Arithmetica 198 (2021) 129–168.
date_created: 2023-01-16T11:44:54Z
date_published: 2021-01-04T00:00:00Z
date_updated: 2023-05-08T11:58:14Z
day: '04'
doi: 10.4064/aa191016-30-7
extern: '1'
external_id:
arxiv:
- '2001.09634'
intvolume: ' 198'
issue: '2'
keyword:
- Algebra and Number Theory
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2001.09634
month: '01'
oa: 1
oa_version: Preprint
page: 129-168
publication: Acta Arithmetica
publication_identifier:
issn:
- 0065-1036
- 1730-6264
publication_status: published
publisher: Institute of Mathematics, Polish Academy of Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: Primitive divisors of elliptic divisibility sequences for elliptic curves with
j=1728
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 198
year: '2021'
...
---
_id: '12314'
abstract:
- lang: eng
text: "In literature, there are two different definitions of elliptic divisibility\r\nsequences.
The first one says that a sequence of integers $\\{h_n\\}_{n\\geq 0}$\r\nis an
elliptic divisibility sequence if it verifies the recurrence relation\r\n$h_{m+n}h_{m-n}h_{r}^2=h_{m+r}h_{m-r}h_{n}^2-h_{n+r}h_{n-r}h_{m}^2$
for every\r\nnatural number $m\\geq n\\geq r$. The second definition says that
a sequence of\r\nintegers $\\{\\beta_n\\}_{n\\geq 0}$ is an elliptic divisibility
sequence if it is\r\nthe sequence of the square roots (chosen with an appropriate
sign) of the\r\ndenominators of the abscissas of the iterates of a point on a
rational elliptic\r\ncurve. It is well-known that the two sequences are not equivalent.
Hence, given\r\na sequence of the denominators $\\{\\beta_n\\}_{n\\geq 0}$, in
general does not\r\nhold\r\n$\\beta_{m+n}\\beta_{m-n}\\beta_{r}^2=\\beta_{m+r}\\beta_{m-r}\\beta_{n}^2-\\beta_{n+r}\\beta_{n-r}\\beta_{m}^2$\r\nfor
$m\\geq n\\geq r$. We will prove that the recurrence relation above holds for\r\n$\\{\\beta_n\\}_{n\\geq
0}$ under some conditions on the indexes $m$, $n$, and $r$."
article_number: '2102.07573'
article_processing_charge: No
arxiv: 1
author:
- first_name: Matteo
full_name: Verzobio, Matteo
id: 7aa8f170-131e-11ed-88e1-a9efd01027cb
last_name: Verzobio
orcid: 0000-0002-0854-0306
citation:
ama: Verzobio M. A recurrence relation for elliptic divisibility sequences. arXiv.
doi:10.48550/arXiv.2102.07573
apa: Verzobio, M. (n.d.). A recurrence relation for elliptic divisibility sequences.
arXiv. https://doi.org/10.48550/arXiv.2102.07573
chicago: Verzobio, Matteo. “A Recurrence Relation for Elliptic Divisibility Sequences.”
ArXiv, n.d. https://doi.org/10.48550/arXiv.2102.07573.
ieee: M. Verzobio, “A recurrence relation for elliptic divisibility sequences,”
arXiv. .
ista: Verzobio M. A recurrence relation for elliptic divisibility sequences. arXiv,
2102.07573.
mla: Verzobio, Matteo. “A Recurrence Relation for Elliptic Divisibility Sequences.”
ArXiv, 2102.07573, doi:10.48550/arXiv.2102.07573.
short: M. Verzobio, ArXiv (n.d.).
date_created: 2023-01-16T11:46:36Z
date_published: 2021-02-15T00:00:00Z
date_updated: 2023-02-21T10:22:57Z
day: '15'
doi: 10.48550/arXiv.2102.07573
extern: '1'
external_id:
arxiv:
- '2102.07573'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2102.07573'
month: '02'
oa: 1
oa_version: Preprint
publication: arXiv
publication_status: submitted
status: public
title: A recurrence relation for elliptic divisibility sequences
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...
---
_id: '12583'
abstract:
- lang: eng
text: Peruvian glaciers are important contributors to dry season runoff for agriculture
and hydropower, but they are at risk of disappearing due to climate change. We
applied a physically based, energy balance melt model at five on-glacier sites
within the Peruvian Cordilleras Blanca and Vilcanota. Net shortwave radiation
dominates the energy balance, and despite this flux being higher in the dry season,
melt rates are lower due to losses from net longwave radiation and the latent
heat flux. The sensible heat flux is a relatively small contributor to melt energy.
At three of the sites the wet season snowpack was discontinuous, forming and melting
within a daily to weekly timescale, and resulting in highly variable melt rates
closely related to precipitation dynamics. Cold air temperatures due to a strong
La Niña year at Shallap Glacier (Cordillera Blanca) resulted in a continuous wet
season snowpack, significantly reducing wet season ablation. Sublimation was most
important at the highest site in the accumulation zone of the Quelccaya Ice Cap
(Cordillera Vilcanota), accounting for 81% of ablation, compared to 2%–4% for
the other sites. Air temperature and precipitation inputs were perturbed to investigate
the climate sensitivity of the five glaciers. At the lower sites warmer air temperatures
resulted in a switch from snowfall to rain, so that ablation was increased via
the decrease in albedo and increase in net shortwave radiation. At the top of
Quelccaya Ice Cap warming caused melting to replace sublimation so that ablation
increased nonlinearly with air temperature.
article_number: e2021JD034911
article_processing_charge: No
article_type: original
author:
- first_name: Catriona L.
full_name: Fyffe, Catriona L.
last_name: Fyffe
- first_name: Emily
full_name: Potter, Emily
last_name: Potter
- first_name: Stefan
full_name: Fugger, Stefan
last_name: Fugger
- first_name: Andrew
full_name: Orr, Andrew
last_name: Orr
- first_name: Simone
full_name: Fatichi, Simone
last_name: Fatichi
- first_name: Edwin
full_name: Loarte, Edwin
last_name: Loarte
- first_name: Katy
full_name: Medina, Katy
last_name: Medina
- first_name: Robert Å.
full_name: Hellström, Robert Å.
last_name: Hellström
- first_name: Maud
full_name: Bernat, Maud
last_name: Bernat
- first_name: Caroline
full_name: Aubry‐Wake, Caroline
last_name: Aubry‐Wake
- first_name: Wolfgang
full_name: Gurgiser, Wolfgang
last_name: Gurgiser
- first_name: L. Baker
full_name: Perry, L. Baker
last_name: Perry
- first_name: Wilson
full_name: Suarez, Wilson
last_name: Suarez
- first_name: Duncan J.
full_name: Quincey, Duncan J.
last_name: Quincey
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
citation:
ama: 'Fyffe CL, Potter E, Fugger S, et al. The energy and mass balance of Peruvian
Glaciers. Journal of Geophysical Research: Atmospheres. 2021;126(23). doi:10.1029/2021jd034911'
apa: 'Fyffe, C. L., Potter, E., Fugger, S., Orr, A., Fatichi, S., Loarte, E., …
Pellicciotti, F. (2021). The energy and mass balance of Peruvian Glaciers. Journal
of Geophysical Research: Atmospheres. American Geophysical Union. https://doi.org/10.1029/2021jd034911'
chicago: 'Fyffe, Catriona L., Emily Potter, Stefan Fugger, Andrew Orr, Simone Fatichi,
Edwin Loarte, Katy Medina, et al. “The Energy and Mass Balance of Peruvian Glaciers.”
Journal of Geophysical Research: Atmospheres. American Geophysical Union,
2021. https://doi.org/10.1029/2021jd034911.'
ieee: 'C. L. Fyffe et al., “The energy and mass balance of Peruvian Glaciers,”
Journal of Geophysical Research: Atmospheres, vol. 126, no. 23. American
Geophysical Union, 2021.'
ista: 'Fyffe CL, Potter E, Fugger S, Orr A, Fatichi S, Loarte E, Medina K, Hellström
RÅ, Bernat M, Aubry‐Wake C, Gurgiser W, Perry LB, Suarez W, Quincey DJ, Pellicciotti
F. 2021. The energy and mass balance of Peruvian Glaciers. Journal of Geophysical
Research: Atmospheres. 126(23), e2021JD034911.'
mla: 'Fyffe, Catriona L., et al. “The Energy and Mass Balance of Peruvian Glaciers.”
Journal of Geophysical Research: Atmospheres, vol. 126, no. 23, e2021JD034911,
American Geophysical Union, 2021, doi:10.1029/2021jd034911.'
short: 'C.L. Fyffe, E. Potter, S. Fugger, A. Orr, S. Fatichi, E. Loarte, K. Medina,
R.Å. Hellström, M. Bernat, C. Aubry‐Wake, W. Gurgiser, L.B. Perry, W. Suarez,
D.J. Quincey, F. Pellicciotti, Journal of Geophysical Research: Atmospheres 126
(2021).'
date_created: 2023-02-20T08:10:43Z
date_published: 2021-12-16T00:00:00Z
date_updated: 2023-02-28T13:31:08Z
day: '16'
doi: 10.1029/2021jd034911
extern: '1'
intvolume: ' 126'
issue: '23'
keyword:
- Space and Planetary Science
- Earth and Planetary Sciences (miscellaneous)
- Atmospheric Science
- Geophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1029/2021JD034911
month: '12'
oa: 1
oa_version: Published Version
publication: 'Journal of Geophysical Research: Atmospheres'
publication_identifier:
eissn:
- 2169-8996
issn:
- 2169-897X
publication_status: published
publisher: American Geophysical Union
quality_controlled: '1'
scopus_import: '1'
status: public
title: The energy and mass balance of Peruvian Glaciers
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 126
year: '2021'
...
---
_id: '12584'
abstract:
- lang: eng
text: This project explored the integrated use of satellite, ground observations
and hydrological distributed models to support water resources assessment and
monitoring in High Mountain Asia (HMA). Hydrological data products were generated
taking advantage of the synergies of European and Chinese data assets and space-borne
observation systems. Energy-budget-based glacier mass balance and hydrological
models driven by satellite observations were developed. These models can be applied
to describe glacier-melt contribution to river flow. Satellite hydrological data
products were used for forcing, calibration, validation and data assimilation
in distributed river basin models. A pilot study was carried out on the Red River
basin. Multiple hydrological data products were generated using the data collected
by Chinese satellites. A new Evapo-Transpiration (ET) dataset from 2000 to 2018
was generated, including plant transpiration, soil evaporation, rainfall interception
loss, snow/ice sublimation and open water evaporation. Higher resolution data
were used to characterize glaciers and their response to environmental forcing.
These studies focused on the Parlung Zangbo Basin, where glacier facies were mapped
with GaoFeng (GF), Sentinal-2/Multi-Spectral Imager (S2/MSI) and Landsat8/Operational
Land Imager (L8/OLI) data. The geodetic mass balance was estimated between 2000
and 2017 with Zi-Yuan (ZY)-3 Stereo Images and the SRTM DEM. Surface velocity
was studied with Landsat5/Thematic Mapper (L5/TM), L8/OLI and S2/MSI data over
the period 2013–2019. An updated method was developed to improve the retrieval
of glacier albedo by correcting glacier reflectance for anisotropy, and a new
dataset on glacier albedo was generated for the period 2001–2020. A detailed glacier
energy and mass balance model was developed with the support of field experiments
at the Parlung No. 4 Glacier and the 24 K Glacier, both in the Tibetan Plateau.
Besides meteorological measurements, the field experiments included glaciological
and hydrological measurements. The energy balance model was formulated in terms
of enthalpy for easier treatment of water phase transitions. The model was applied
to assess the spatial variability in glacier melt. In the Parlung No. 4 Glacier,
the accumulated glacier melt was between 1.5 and 2.5 m w.e. in the accumulation
zone and between 4.5 and 6.0 m w.e. in the ablation zone, reaching 6.5 m w.e.
at the terminus. The seasonality in the glacier mass balance was observed by combining
intensive field campaigns with continuous automatic observations. The linkage
of the glacier and snowpack mass balance with water resources in a river basin
was analyzed in the Chiese (Italy) and Heihe (China) basins by developing and
applying integrated hydrological models using satellite retrievals in multiple
ways. The model FEST-WEB was calibrated using retrievals of Land Surface Temperature
(LST) to map soil hydrological properties. A watershed model was developed by
coupling ecohydrological and socioeconomic systems. Integrated modeling is supported
by an updated and parallelized data assimilation system. The latter exploits retrievals
of brightness temperature (Advanced Microwave Scanning Radiometer, AMSR), LST
(Moderate Resolution Imaging Spectroradiometer, MODIS), precipitation (Tropical
Rainfall Measuring Mission (TRMM) and FengYun (FY)-2D) and in-situ measurements.
In the case study on the Red River Basin, a new algorithm has been applied to
disaggregate the SMOS (Soil Moisture and Ocean Salinity) soil moisture retrievals
by making use of the correlation between evaporative fraction and soil moisture.
article_number: '5122'
article_processing_charge: No
article_type: letter_note
author:
- first_name: Massimo
full_name: Menenti, Massimo
last_name: Menenti
- first_name: Xin
full_name: Li, Xin
last_name: Li
- first_name: Li
full_name: Jia, Li
last_name: Jia
- first_name: Kun
full_name: Yang, Kun
last_name: Yang
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
- first_name: Marco
full_name: Mancini, Marco
last_name: Mancini
- first_name: Jiancheng
full_name: Shi, Jiancheng
last_name: Shi
- first_name: Maria José
full_name: Escorihuela, Maria José
last_name: Escorihuela
- first_name: Chaolei
full_name: Zheng, Chaolei
last_name: Zheng
- first_name: Qiting
full_name: Chen, Qiting
last_name: Chen
- first_name: Jing
full_name: Lu, Jing
last_name: Lu
- first_name: Jie
full_name: Zhou, Jie
last_name: Zhou
- first_name: Guangcheng
full_name: Hu, Guangcheng
last_name: Hu
- first_name: Shaoting
full_name: Ren, Shaoting
last_name: Ren
- first_name: Jing
full_name: Zhang, Jing
last_name: Zhang
- first_name: Qinhuo
full_name: Liu, Qinhuo
last_name: Liu
- first_name: Yubao
full_name: Qiu, Yubao
last_name: Qiu
- first_name: Chunlin
full_name: Huang, Chunlin
last_name: Huang
- first_name: Ji
full_name: Zhou, Ji
last_name: Zhou
- first_name: Xujun
full_name: Han, Xujun
last_name: Han
- first_name: Xiaoduo
full_name: Pan, Xiaoduo
last_name: Pan
- first_name: Hongyi
full_name: Li, Hongyi
last_name: Li
- first_name: Yerong
full_name: Wu, Yerong
last_name: Wu
- first_name: Baohong
full_name: Ding, Baohong
last_name: Ding
- first_name: Wei
full_name: Yang, Wei
last_name: Yang
- first_name: Pascal
full_name: Buri, Pascal
last_name: Buri
- first_name: Michael J.
full_name: McCarthy, Michael J.
last_name: McCarthy
- first_name: Evan S.
full_name: Miles, Evan S.
last_name: Miles
- first_name: Thomas E.
full_name: Shaw, Thomas E.
last_name: Shaw
- first_name: Chunfeng
full_name: Ma, Chunfeng
last_name: Ma
- first_name: Yanzhao
full_name: Zhou, Yanzhao
last_name: Zhou
- first_name: Chiara
full_name: Corbari, Chiara
last_name: Corbari
- first_name: Rui
full_name: Li, Rui
last_name: Li
- first_name: Tianjie
full_name: Zhao, Tianjie
last_name: Zhao
- first_name: Vivien
full_name: Stefan, Vivien
last_name: Stefan
- first_name: Qi
full_name: Gao, Qi
last_name: Gao
- first_name: Jingxiao
full_name: Zhang, Jingxiao
last_name: Zhang
- first_name: Qiuxia
full_name: Xie, Qiuxia
last_name: Xie
- first_name: Ning
full_name: Wang, Ning
last_name: Wang
- first_name: Yibo
full_name: Sun, Yibo
last_name: Sun
- first_name: Xinyu
full_name: Mo, Xinyu
last_name: Mo
- first_name: Junru
full_name: Jia, Junru
last_name: Jia
- first_name: Achille Pierre
full_name: Jouberton, Achille Pierre
last_name: Jouberton
- first_name: Marin
full_name: Kneib, Marin
last_name: Kneib
- first_name: Stefan
full_name: Fugger, Stefan
last_name: Fugger
- first_name: Nicola
full_name: Paciolla, Nicola
last_name: Paciolla
- first_name: Giovanni
full_name: Paolini, Giovanni
last_name: Paolini
citation:
ama: Menenti M, Li X, Jia L, et al. Multi-source hydrological data products to monitor
High Asian river basins and regional water security. Remote Sensing. 2021;13(24).
doi:10.3390/rs13245122
apa: Menenti, M., Li, X., Jia, L., Yang, K., Pellicciotti, F., Mancini, M., … Paolini,
G. (2021). Multi-source hydrological data products to monitor High Asian river
basins and regional water security. Remote Sensing. MDPI. https://doi.org/10.3390/rs13245122
chicago: Menenti, Massimo, Xin Li, Li Jia, Kun Yang, Francesca Pellicciotti, Marco
Mancini, Jiancheng Shi, et al. “Multi-Source Hydrological Data Products to Monitor
High Asian River Basins and Regional Water Security.” Remote Sensing. MDPI,
2021. https://doi.org/10.3390/rs13245122.
ieee: M. Menenti et al., “Multi-source hydrological data products to monitor
High Asian river basins and regional water security,” Remote Sensing, vol.
13, no. 24. MDPI, 2021.
ista: Menenti M, Li X, Jia L, Yang K, Pellicciotti F, Mancini M, Shi J, Escorihuela
MJ, Zheng C, Chen Q, Lu J, Zhou J, Hu G, Ren S, Zhang J, Liu Q, Qiu Y, Huang C,
Zhou J, Han X, Pan X, Li H, Wu Y, Ding B, Yang W, Buri P, McCarthy MJ, Miles ES,
Shaw TE, Ma C, Zhou Y, Corbari C, Li R, Zhao T, Stefan V, Gao Q, Zhang J, Xie
Q, Wang N, Sun Y, Mo X, Jia J, Jouberton AP, Kneib M, Fugger S, Paciolla N, Paolini
G. 2021. Multi-source hydrological data products to monitor High Asian river basins
and regional water security. Remote Sensing. 13(24), 5122.
mla: Menenti, Massimo, et al. “Multi-Source Hydrological Data Products to Monitor
High Asian River Basins and Regional Water Security.” Remote Sensing, vol.
13, no. 24, 5122, MDPI, 2021, doi:10.3390/rs13245122.
short: M. Menenti, X. Li, L. Jia, K. Yang, F. Pellicciotti, M. Mancini, J. Shi,
M.J. Escorihuela, C. Zheng, Q. Chen, J. Lu, J. Zhou, G. Hu, S. Ren, J. Zhang,
Q. Liu, Y. Qiu, C. Huang, J. Zhou, X. Han, X. Pan, H. Li, Y. Wu, B. Ding, W. Yang,
P. Buri, M.J. McCarthy, E.S. Miles, T.E. Shaw, C. Ma, Y. Zhou, C. Corbari, R.
Li, T. Zhao, V. Stefan, Q. Gao, J. Zhang, Q. Xie, N. Wang, Y. Sun, X. Mo, J. Jia,
A.P. Jouberton, M. Kneib, S. Fugger, N. Paciolla, G. Paolini, Remote Sensing 13
(2021).
date_created: 2023-02-20T08:10:49Z
date_published: 2021-12-16T00:00:00Z
date_updated: 2023-02-28T13:26:53Z
day: '16'
doi: 10.3390/rs13245122
extern: '1'
intvolume: ' 13'
issue: '24'
keyword:
- General Earth and Planetary Sciences
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/rs13245122
month: '12'
oa: 1
oa_version: Published Version
publication: Remote Sensing
publication_identifier:
issn:
- 2072-4292
publication_status: published
publisher: MDPI
quality_controlled: '1'
scopus_import: '1'
status: public
title: Multi-source hydrological data products to monitor High Asian river basins
and regional water security
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 13
year: '2021'
...
---
_id: '12585'
abstract:
- lang: eng
text: Glaciers in High Mountain Asia generate meltwater that supports the water
needs of 250 million people, but current knowledge of annual accumulation and
ablation is limited to sparse field measurements biased in location and glacier
size. Here, we present altitudinally-resolved specific mass balances (surface,
internal, and basal combined) for 5527 glaciers in High Mountain Asia for 2000–2016,
derived by correcting observed glacier thinning patterns for mass redistribution
due to ice flow. We find that 41% of glaciers accumulated mass over less than
20% of their area, and only 60% ± 10% of regional annual ablation was compensated
by accumulation. Even without 21st century warming, 21% ± 1% of ice volume will
be lost by 2100 due to current climatic-geometric imbalance, representing a reduction
in glacier ablation into rivers of 28% ± 1%. The ablation of glaciers in the Himalayas
and Tien Shan was mostly unsustainable and ice volume in these regions will reduce
by at least 30% by 2100. The most important and vulnerable glacier-fed river basins
(Amu Darya, Indus, Syr Darya, Tarim Interior) were supplied with >50% sustainable
glacier ablation but will see long-term reductions in ice mass and glacier meltwater
supply regardless of the Karakoram Anomaly.
article_number: '2868'
article_processing_charge: No
article_type: original
author:
- first_name: Evan
full_name: Miles, Evan
last_name: Miles
- first_name: Michael
full_name: McCarthy, Michael
last_name: McCarthy
- first_name: Amaury
full_name: Dehecq, Amaury
last_name: Dehecq
- first_name: Marin
full_name: Kneib, Marin
last_name: Kneib
- first_name: Stefan
full_name: Fugger, Stefan
last_name: Fugger
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
citation:
ama: Miles E, McCarthy M, Dehecq A, Kneib M, Fugger S, Pellicciotti F. Health and
sustainability of glaciers in High Mountain Asia. Nature Communications.
2021;12. doi:10.1038/s41467-021-23073-4
apa: Miles, E., McCarthy, M., Dehecq, A., Kneib, M., Fugger, S., & Pellicciotti,
F. (2021). Health and sustainability of glaciers in High Mountain Asia. Nature
Communications. Springer Nature. https://doi.org/10.1038/s41467-021-23073-4
chicago: Miles, Evan, Michael McCarthy, Amaury Dehecq, Marin Kneib, Stefan Fugger,
and Francesca Pellicciotti. “Health and Sustainability of Glaciers in High Mountain
Asia.” Nature Communications. Springer Nature, 2021. https://doi.org/10.1038/s41467-021-23073-4.
ieee: E. Miles, M. McCarthy, A. Dehecq, M. Kneib, S. Fugger, and F. Pellicciotti,
“Health and sustainability of glaciers in High Mountain Asia,” Nature Communications,
vol. 12. Springer Nature, 2021.
ista: Miles E, McCarthy M, Dehecq A, Kneib M, Fugger S, Pellicciotti F. 2021. Health
and sustainability of glaciers in High Mountain Asia. Nature Communications. 12,
2868.
mla: Miles, Evan, et al. “Health and Sustainability of Glaciers in High Mountain
Asia.” Nature Communications, vol. 12, 2868, Springer Nature, 2021, doi:10.1038/s41467-021-23073-4.
short: E. Miles, M. McCarthy, A. Dehecq, M. Kneib, S. Fugger, F. Pellicciotti, Nature
Communications 12 (2021).
date_created: 2023-02-20T08:11:29Z
date_published: 2021-05-17T00:00:00Z
date_updated: 2023-02-28T13:21:51Z
day: '17'
doi: 10.1038/s41467-021-23073-4
extern: '1'
intvolume: ' 12'
keyword:
- General Physics and Astronomy
- General Biochemistry
- Genetics and Molecular Biology
- General Chemistry
- Multidisciplinary
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1038/s41467-021-23073-4
month: '05'
oa: 1
oa_version: Published Version
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Health and sustainability of glaciers in High Mountain Asia
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 12
year: '2021'
...
---
_id: '12586'
abstract:
- lang: eng
text: Ice cliffs are common on debris-covered glaciers and have relatively high
melt rates due to their direct exposure to incoming radiation. Previous studies
have shown that their number and relative area can change considerably from year
to year, but this variability has not been explored, in part because available
cliff observations are irregular. Here, we systematically mapped and tracked ice
cliffs across four debris-covered glaciers in High Mountain Asia for every late
ablation season from 2009 to 2019 using high-resolution multi-spectral satellite
imagery. We then quantified the processes occurring at the feature scale to train
a stochastic birth-death model to represent the cliff population dynamics. Our
results show that while the cliff relative area can change by up to 20% from year
to year, the natural long-term variability is constrained, thus defining a glacier-specific
cliff carrying capacity. In a subsequent step, the inclusion of external drivers
related to climate, glacier dynamics, and hydrology highlights the influence of
these variables on the cliff population dynamics, which is usually not a direct
one due to the complexity and interdependence of the processes taking place at
the glacier surface. In some extreme cases (here, a glacier surge), these external
drivers may lead to a reorganization of the cliffs at the glacier surface and
a change in the natural variability. These results have implications for the melt
of debris-covered glaciers, in addition to showing the high rate of changes at
their surface and highlighting some of the links between cliff population and
glacier state.
article_number: e2021JF006179
article_processing_charge: No
article_type: original
author:
- first_name: M.
full_name: Kneib, M.
last_name: Kneib
- first_name: E. S.
full_name: Miles, E. S.
last_name: Miles
- first_name: P.
full_name: Buri, P.
last_name: Buri
- first_name: P.
full_name: Molnar, P.
last_name: Molnar
- first_name: M.
full_name: McCarthy, M.
last_name: McCarthy
- first_name: S.
full_name: Fugger, S.
last_name: Fugger
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
citation:
ama: 'Kneib M, Miles ES, Buri P, et al. Interannual dynamics of ice cliff populations
on debris‐covered glaciers from remote sensing observations and stochastic modeling.
Journal of Geophysical Research: Earth Surface. 2021;126(10). doi:10.1029/2021jf006179'
apa: 'Kneib, M., Miles, E. S., Buri, P., Molnar, P., McCarthy, M., Fugger, S., &
Pellicciotti, F. (2021). Interannual dynamics of ice cliff populations on debris‐covered
glaciers from remote sensing observations and stochastic modeling. Journal
of Geophysical Research: Earth Surface. American Geophysical Union. https://doi.org/10.1029/2021jf006179'
chicago: 'Kneib, M., E. S. Miles, P. Buri, P. Molnar, M. McCarthy, S. Fugger, and
Francesca Pellicciotti. “Interannual Dynamics of Ice Cliff Populations on Debris‐covered
Glaciers from Remote Sensing Observations and Stochastic Modeling.” Journal
of Geophysical Research: Earth Surface. American Geophysical Union, 2021.
https://doi.org/10.1029/2021jf006179.'
ieee: 'M. Kneib et al., “Interannual dynamics of ice cliff populations on
debris‐covered glaciers from remote sensing observations and stochastic modeling,”
Journal of Geophysical Research: Earth Surface, vol. 126, no. 10. American
Geophysical Union, 2021.'
ista: 'Kneib M, Miles ES, Buri P, Molnar P, McCarthy M, Fugger S, Pellicciotti F.
2021. Interannual dynamics of ice cliff populations on debris‐covered glaciers
from remote sensing observations and stochastic modeling. Journal of Geophysical
Research: Earth Surface. 126(10), e2021JF006179.'
mla: 'Kneib, M., et al. “Interannual Dynamics of Ice Cliff Populations on Debris‐covered
Glaciers from Remote Sensing Observations and Stochastic Modeling.” Journal
of Geophysical Research: Earth Surface, vol. 126, no. 10, e2021JF006179, American
Geophysical Union, 2021, doi:10.1029/2021jf006179.'
short: 'M. Kneib, E.S. Miles, P. Buri, P. Molnar, M. McCarthy, S. Fugger, F. Pellicciotti,
Journal of Geophysical Research: Earth Surface 126 (2021).'
date_created: 2023-02-20T08:11:36Z
date_published: 2021-10-01T00:00:00Z
date_updated: 2023-02-28T13:18:26Z
day: '01'
doi: 10.1029/2021jf006179
extern: '1'
intvolume: ' 126'
issue: '10'
keyword:
- Earth-Surface Processes
- Geophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1029/2021JF006179
month: '10'
oa: 1
oa_version: Published Version
publication: 'Journal of Geophysical Research: Earth Surface'
publication_identifier:
issn:
- 2169-9003
- 2169-9011
publication_status: published
publisher: American Geophysical Union
quality_controlled: '1'
scopus_import: '1'
status: public
title: Interannual dynamics of ice cliff populations on debris‐covered glaciers from
remote sensing observations and stochastic modeling
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 126
year: '2021'
...
---
_id: '12587'
abstract:
- lang: eng
text: Surface energy-balance models are commonly used in conjunction with satellite
thermal imagery to estimate supraglacial debris thickness. Removing the need for
local meteorological data in the debris thickness estimation workflow could improve
the versatility and spatiotemporal application of debris thickness estimation.
We evaluate the use of regional reanalysis data to derive debris thickness for
two mountain glaciers using a surface energy-balance model. Results forced using
ERA-5 agree with AWS-derived estimates to within 0.01 ± 0.05 m for Miage Glacier,
Italy, and 0.01 ± 0.02 m for Khumbu Glacier, Nepal. ERA-5 data were then used
to estimate spatiotemporal changes in debris thickness over a ~20-year period
for Miage Glacier, Khumbu Glacier and Haut Glacier d'Arolla, Switzerland. We observe
significant increases in debris thickness at the terminus for Haut Glacier d'Arolla
and at the margins of the expanding debris cover at all glaciers. While simulated
debris thickness was underestimated compared to point measurements in areas of
thick debris, our approach can reconstruct glacier-scale debris thickness distribution
and its temporal evolution over multiple decades. We find significant changes
in debris thickness over areas of thin debris, areas susceptible to high ablation
rates, where current knowledge of debris evolution is limited.
article_processing_charge: No
article_type: original
author:
- first_name: Rebecca L.
full_name: Stewart, Rebecca L.
last_name: Stewart
- first_name: Matthew
full_name: Westoby, Matthew
last_name: Westoby
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
- first_name: Ann
full_name: Rowan, Ann
last_name: Rowan
- first_name: Darrel
full_name: Swift, Darrel
last_name: Swift
- first_name: Benjamin
full_name: Brock, Benjamin
last_name: Brock
- first_name: John
full_name: Woodward, John
last_name: Woodward
citation:
ama: Stewart RL, Westoby M, Pellicciotti F, et al. Using climate reanalysis data
in conjunction with multi-temporal satellite thermal imagery to derive supraglacial
debris thickness changes from energy-balance modelling. Journal of Glaciology.
2021;67(262):366-384. doi:10.1017/jog.2020.111
apa: Stewart, R. L., Westoby, M., Pellicciotti, F., Rowan, A., Swift, D., Brock,
B., & Woodward, J. (2021). Using climate reanalysis data in conjunction with
multi-temporal satellite thermal imagery to derive supraglacial debris thickness
changes from energy-balance modelling. Journal of Glaciology. Cambridge
University Press. https://doi.org/10.1017/jog.2020.111
chicago: Stewart, Rebecca L., Matthew Westoby, Francesca Pellicciotti, Ann Rowan,
Darrel Swift, Benjamin Brock, and John Woodward. “Using Climate Reanalysis Data
in Conjunction with Multi-Temporal Satellite Thermal Imagery to Derive Supraglacial
Debris Thickness Changes from Energy-Balance Modelling.” Journal of Glaciology.
Cambridge University Press, 2021. https://doi.org/10.1017/jog.2020.111.
ieee: R. L. Stewart et al., “Using climate reanalysis data in conjunction
with multi-temporal satellite thermal imagery to derive supraglacial debris thickness
changes from energy-balance modelling,” Journal of Glaciology, vol. 67,
no. 262. Cambridge University Press, pp. 366–384, 2021.
ista: Stewart RL, Westoby M, Pellicciotti F, Rowan A, Swift D, Brock B, Woodward
J. 2021. Using climate reanalysis data in conjunction with multi-temporal satellite
thermal imagery to derive supraglacial debris thickness changes from energy-balance
modelling. Journal of Glaciology. 67(262), 366–384.
mla: Stewart, Rebecca L., et al. “Using Climate Reanalysis Data in Conjunction with
Multi-Temporal Satellite Thermal Imagery to Derive Supraglacial Debris Thickness
Changes from Energy-Balance Modelling.” Journal of Glaciology, vol. 67,
no. 262, Cambridge University Press, 2021, pp. 366–84, doi:10.1017/jog.2020.111.
short: R.L. Stewart, M. Westoby, F. Pellicciotti, A. Rowan, D. Swift, B. Brock,
J. Woodward, Journal of Glaciology 67 (2021) 366–384.
date_created: 2023-02-20T08:11:42Z
date_published: 2021-04-01T00:00:00Z
date_updated: 2023-02-28T13:07:11Z
day: '01'
doi: 10.1017/jog.2020.111
extern: '1'
intvolume: ' 67'
issue: '262'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1017/jog.2020.111
month: '04'
oa: 1
oa_version: Published Version
page: 366-384
publication: Journal of Glaciology
publication_identifier:
eissn:
- 1727-5652
issn:
- 0022-1430
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Using climate reanalysis data in conjunction with multi-temporal satellite
thermal imagery to derive supraglacial debris thickness changes from energy-balance
modelling
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 67
year: '2021'
...
---
_id: '12588'
abstract:
- lang: eng
text: The thinning patterns of debris-covered glaciers in High Mountain Asia are
not well understood. Here we calculate the effect of supraglacial ice cliffs on
the mass balance of all glaciers in a Himalayan catchment, using a process-based
ice cliff melt model. We show that ice cliffs are responsible for higher than
expected thinning rates of debris-covered glacier tongues, leading to an underestimation
of their ice mass loss of 17% ± 4% in the catchment if not considered. We also
show that cliffs do enhance melt where other processes would suppress it, that
is, at high elevations, or where debris is thick, and that they contribute relatively
more to glacier mass loss if oriented north. Our approach provides a key contribution
to our understanding of the mass losses of debris-covered glaciers, and a new
quantification of their catchment wide melt and mass balance.
article_number: e2020GL092150
article_processing_charge: No
article_type: letter_note
author:
- first_name: Pascal
full_name: Buri, Pascal
last_name: Buri
- first_name: Evan S.
full_name: Miles, Evan S.
last_name: Miles
- first_name: Jakob F.
full_name: Steiner, Jakob F.
last_name: Steiner
- first_name: Silvan
full_name: Ragettli, Silvan
last_name: Ragettli
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
citation:
ama: Buri P, Miles ES, Steiner JF, Ragettli S, Pellicciotti F. Supraglacial ice
cliffs can substantially increase the mass loss of debris‐covered glaciers. Geophysical
Research Letters. 2021;48(6). doi:10.1029/2020gl092150
apa: Buri, P., Miles, E. S., Steiner, J. F., Ragettli, S., & Pellicciotti, F.
(2021). Supraglacial ice cliffs can substantially increase the mass loss of debris‐covered
glaciers. Geophysical Research Letters. American Geophysical Union. https://doi.org/10.1029/2020gl092150
chicago: Buri, Pascal, Evan S. Miles, Jakob F. Steiner, Silvan Ragettli, and Francesca
Pellicciotti. “Supraglacial Ice Cliffs Can Substantially Increase the Mass Loss
of Debris‐covered Glaciers.” Geophysical Research Letters. American Geophysical
Union, 2021. https://doi.org/10.1029/2020gl092150.
ieee: P. Buri, E. S. Miles, J. F. Steiner, S. Ragettli, and F. Pellicciotti, “Supraglacial
ice cliffs can substantially increase the mass loss of debris‐covered glaciers,”
Geophysical Research Letters, vol. 48, no. 6. American Geophysical Union,
2021.
ista: Buri P, Miles ES, Steiner JF, Ragettli S, Pellicciotti F. 2021. Supraglacial
ice cliffs can substantially increase the mass loss of debris‐covered glaciers.
Geophysical Research Letters. 48(6), e2020GL092150.
mla: Buri, Pascal, et al. “Supraglacial Ice Cliffs Can Substantially Increase the
Mass Loss of Debris‐covered Glaciers.” Geophysical Research Letters, vol.
48, no. 6, e2020GL092150, American Geophysical Union, 2021, doi:10.1029/2020gl092150.
short: P. Buri, E.S. Miles, J.F. Steiner, S. Ragettli, F. Pellicciotti, Geophysical
Research Letters 48 (2021).
date_created: 2023-02-20T08:11:49Z
date_published: 2021-03-28T00:00:00Z
date_updated: 2023-02-28T13:01:31Z
day: '28'
doi: 10.1029/2020gl092150
extern: '1'
intvolume: ' 48'
issue: '6'
keyword:
- General Earth and Planetary Sciences
- Geophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1029/2020GL092150
month: '03'
oa: 1
oa_version: Published Version
publication: Geophysical Research Letters
publication_identifier:
eissn:
- 1944-8007
issn:
- 0094-8276
publication_status: published
publisher: American Geophysical Union
quality_controlled: '1'
scopus_import: '1'
status: public
title: Supraglacial ice cliffs can substantially increase the mass loss of debris‐covered
glaciers
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 48
year: '2021'
...