---
_id: '15047'
abstract:
- lang: eng
text: Tropical precipitation extremes and their changes with surface warming are
investigated using global storm resolving simulations and high-resolution observations.
The simulations demonstrate that the mesoscale organization of convection, a process
that cannot be physically represented by conventional global climate models, is
important for the variations of tropical daily accumulated precipitation extremes.
In both the simulations and observations, daily precipitation extremes increase
in a more organized state, in association with larger, but less frequent, storms.
Repeating the simulations for a warmer climate results in a robust increase in
monthly-mean daily precipitation extremes. Higher precipitation percentiles have
a greater sensitivity to convective organization, which is predicted to increase
with warming. Without changes in organization, the strongest daily precipitation
extremes over the tropical oceans increase at a rate close to Clausius-Clapeyron
(CC) scaling. Thus, in a future warmer state with increased organization, the
strongest daily precipitation extremes over oceans increase at a faster rate than
CC scaling.
acknowledgement: This work is supported by the Max-Planck-Gesellschaft (MPG). We greatly
appreciate computational resources from Deutsches Klimarechenzentrum (DKRZ) and
the Jülich Supercomputing Centre (JSC). ICONA/O simulations are funded through the
NextGEMS project by the EU’s Horizon 2020 programme (grant agreement no. 101003470).
ICONA simulations are funded through the MONSOON-2.0 project (grant agreement no.
01LP1927A) which is supported from German Federal Ministry of Education and Research
(BMBF). J.B. acknowledges funding from the European Union’s Horizon 2020 research
and innovation programme under the Marie Skłodowska-Curie grant (grant agreement
no. 101034413). B.S. acknowledges funding from the EU’s Horizon 2020 programme (grant
agreement no. 101003470). C.M. gratefully acknowledges funding from the European
Research Council (ERC) under the European Union’s Horizon 2020 research and innovation
program (Project CLUSTER, grant agreement no. 805041).
article_number: eadj6801
article_processing_charge: Yes
article_type: original
author:
- first_name: Jiawei
full_name: Bao, Jiawei
id: bb9a7399-fefd-11ed-be3c-ae648fd1d160
last_name: Bao
- first_name: Bjorn
full_name: Stevens, Bjorn
last_name: Stevens
- first_name: Lukas
full_name: Kluft, Lukas
last_name: Kluft
- first_name: Caroline J
full_name: Muller, Caroline J
id: f978ccb0-3f7f-11eb-b193-b0e2bd13182b
last_name: Muller
orcid: 0000-0001-5836-5350
citation:
ama: Bao J, Stevens B, Kluft L, Muller CJ. Intensification of daily tropical precipitation
extremes from more organized convection. Science Advances. 2024;10(8).
doi:10.1126/sciadv.adj6801
apa: Bao, J., Stevens, B., Kluft, L., & Muller, C. J. (2024). Intensification
of daily tropical precipitation extremes from more organized convection. Science
Advances. American Association for the Advancement of Science. https://doi.org/10.1126/sciadv.adj6801
chicago: Bao, Jiawei, Bjorn Stevens, Lukas Kluft, and Caroline J Muller. “Intensification
of Daily Tropical Precipitation Extremes from More Organized Convection.” Science
Advances. American Association for the Advancement of Science, 2024. https://doi.org/10.1126/sciadv.adj6801.
ieee: J. Bao, B. Stevens, L. Kluft, and C. J. Muller, “Intensification of daily
tropical precipitation extremes from more organized convection,” Science Advances,
vol. 10, no. 8. American Association for the Advancement of Science, 2024.
ista: Bao J, Stevens B, Kluft L, Muller CJ. 2024. Intensification of daily tropical
precipitation extremes from more organized convection. Science Advances. 10(8),
eadj6801.
mla: Bao, Jiawei, et al. “Intensification of Daily Tropical Precipitation Extremes
from More Organized Convection.” Science Advances, vol. 10, no. 8, eadj6801,
American Association for the Advancement of Science, 2024, doi:10.1126/sciadv.adj6801.
short: J. Bao, B. Stevens, L. Kluft, C.J. Muller, Science Advances 10 (2024).
date_created: 2024-03-03T23:00:50Z
date_published: 2024-02-23T00:00:00Z
date_updated: 2024-03-05T09:26:47Z
day: '23'
ddc:
- '550'
department:
- _id: CaMu
doi: 10.1126/sciadv.adj6801
ec_funded: 1
external_id:
pmid:
- '38394192'
file:
- access_level: open_access
checksum: d4ec4f05a6d14745057e14d1b8bf45ae
content_type: application/pdf
creator: dernst
date_created: 2024-03-04T07:34:00Z
date_updated: 2024-03-04T07:34:00Z
file_id: '15051'
file_name: 2024_ScienceAdv_Bao.pdf
file_size: 800926
relation: main_file
success: 1
file_date_updated: 2024-03-04T07:34:00Z
has_accepted_license: '1'
intvolume: ' 10'
issue: '8'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c
call_identifier: H2020
grant_number: '101034413'
name: 'IST-BRIDGE: International postdoctoral program'
- _id: 629205d8-2b32-11ec-9570-e1356ff73576
call_identifier: H2020
grant_number: '805041'
name: organization of CLoUdS, and implications of Tropical cyclones and for the
Energetics of the tropics, in current and waRming climate
publication: Science Advances
publication_identifier:
eissn:
- 2375-2548
publication_status: published
publisher: American Association for the Advancement of Science
quality_controlled: '1'
related_material:
link:
- description: News on ISTA Website
relation: press_release
url: https://ista.ac.at/en/news/cloud-clustering-causes-more-extreme-rain/
scopus_import: '1'
status: public
title: Intensification of daily tropical precipitation extremes from more organized
convection
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: 10
year: '2024'
...
---
_id: '14453'
abstract:
- lang: eng
text: Squall lines are substantially influenced by the interaction of low-level
shear with cold pools associated with convective downdrafts. Beyond an optimal
shear amplitude, squall lines tend to orient themselves at an angle with respect
to the low-level shear. While the mechanisms behind squall line orientation seem
to be increasingly well understood, uncertainties remain on the implications of
this orientation. Roca and Fiolleau (2020, https://doi.org/10.1038/s43247-020-00015-4)
show that long lived mesoscale convective systems, including squall lines, are
disproportionately involved in rainfall extremes in the tropics. This article
investigates the influence of the interaction between low-level shear and squall
line outflow on squall line generated precipitation extrema in the tropics. Using
a cloud resolving model, simulated squall lines in radiative convective equilibrium
amid a shear-dominated regime (super optimal), a balanced regime (optimal), and
an outflow dominated regime (suboptimal). Our results show that precipitation
extremes in squall lines are 40% more intense in the case of optimal shear and
remain 30% superior in the superoptimal regime relative to a disorganized case.
With a theoretical scaling of precipitation extremes (C. Muller & Takayabu, 2020,
https://doi.org/10.1088/1748-9326/ab7130), we show that the condensation rates
control the amplification of precipitation extremes in tropical squall lines,
mainly due to its change in vertical mass flux (dynamic component). The reduction
of dilution by entrainment explains half of this change, consistent with Mulholland
et al. (2021, https://doi.org/10.1175/jas-d-20-0299.1). The other half is explained
by increased cloud-base velocity intensity in optimal and superoptimal squall
lines.
acknowledgement: The authors gratefully acknowledge funding from the European Research
Council under the European Union's Horizon 2020 research and innovation program
(Project CLUSTER, Grant Agreement No. 805041). This work is also supported by a
PhD fellowship funded by the Ecole Normale Supérieure de Paris-Saclay. Authors are
also grateful to Benjamin Filider, who was of great help and support in the development
of ideas. Eventually, we would like to thank Martin Singh, John M. Peters and an
anonymous reviewer for their valuable comments and suggestions, which greatly improved
the quality of the manuscript.
article_number: e2022MS003477
article_processing_charge: Yes
article_type: original
author:
- first_name: Sophie
full_name: Abramian, Sophie
last_name: Abramian
- first_name: Caroline J
full_name: Muller, Caroline J
id: f978ccb0-3f7f-11eb-b193-b0e2bd13182b
last_name: Muller
orcid: 0000-0001-5836-5350
- first_name: Camille
full_name: Risi, Camille
last_name: Risi
citation:
ama: Abramian S, Muller CJ, Risi C. Extreme precipitation in tropical squall lines.
Journal of Advances in Modeling Earth Systems. 2023;15(10). doi:10.1029/2022MS003477
apa: Abramian, S., Muller, C. J., & Risi, C. (2023). Extreme precipitation in
tropical squall lines. Journal of Advances in Modeling Earth Systems. Wiley.
https://doi.org/10.1029/2022MS003477
chicago: Abramian, Sophie, Caroline J Muller, and Camille Risi. “Extreme Precipitation
in Tropical Squall Lines.” Journal of Advances in Modeling Earth Systems.
Wiley, 2023. https://doi.org/10.1029/2022MS003477.
ieee: S. Abramian, C. J. Muller, and C. Risi, “Extreme precipitation in tropical
squall lines,” Journal of Advances in Modeling Earth Systems, vol. 15,
no. 10. Wiley, 2023.
ista: Abramian S, Muller CJ, Risi C. 2023. Extreme precipitation in tropical squall
lines. Journal of Advances in Modeling Earth Systems. 15(10), e2022MS003477.
mla: Abramian, Sophie, et al. “Extreme Precipitation in Tropical Squall Lines.”
Journal of Advances in Modeling Earth Systems, vol. 15, no. 10, e2022MS003477,
Wiley, 2023, doi:10.1029/2022MS003477.
short: S. Abramian, C.J. Muller, C. Risi, Journal of Advances in Modeling Earth
Systems 15 (2023).
date_created: 2023-10-29T23:01:15Z
date_published: 2023-10-01T00:00:00Z
date_updated: 2023-12-13T13:06:40Z
day: '01'
ddc:
- '550'
department:
- _id: CaMu
doi: 10.1029/2022MS003477
ec_funded: 1
external_id:
isi:
- '001084933600001'
file:
- access_level: open_access
checksum: 43e6a1a35b663843c7d3f8d0caaca1a5
content_type: application/pdf
creator: dernst
date_created: 2023-10-30T13:31:42Z
date_updated: 2023-10-30T13:31:42Z
file_id: '14470'
file_name: 2023_JAMES_Abramian.pdf
file_size: 1975210
relation: main_file
success: 1
file_date_updated: 2023-10-30T13:31:42Z
has_accepted_license: '1'
intvolume: ' 15'
isi: 1
issue: '10'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
project:
- _id: 629205d8-2b32-11ec-9570-e1356ff73576
call_identifier: H2020
grant_number: '805041'
name: organization of CLoUdS, and implications of Tropical cyclones and for the
Energetics of the tropics, in current and waRming climate
publication: Journal of Advances in Modeling Earth Systems
publication_identifier:
eissn:
- 1942-2466
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Extreme precipitation in tropical squall lines
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: 15
year: '2023'
...
---
_id: '14654'
abstract:
- lang: eng
text: Two assumptions commonly applied in convection schemes—the diagnostic and
quasi-equilibrium assumptions—imply that convective activity (e.g., convective
precipitation) is controlled only by the large-scale (macrostate) environment
at the time. In contrast, numerical experiments indicate a “memory” or dependence
of convection also on its own previous activity whereby subgrid-scale (microstate)
structures boost but are also boosted by convection. In this study we investigated
this memory by comparing single-column model behavior in two idealized tests previously
executed by a cloud-resolving model (CRM). Conventional convection schemes that
employ the diagnostic assumption fail to reproduce the CRM behavior. The memory-capable
org and Laboratoire de Météorologie Dynamique Zoom cold pool schemes partially
capture the behavior, but fail to fully exhibit the strong reinforcing feedbacks
implied by the CRM. Analysis of this failure suggests that it is because the CRM
supports a linear (or superlinear) dependence of the subgrid structure growth
rate on the precipitation rate, while the org scheme assumes a sublinear dependence.
Among varying versions of the org scheme, the growth rate of the org variable
representing subgrid structure is strongly associated with memory strength. These
results demonstrate the importance of parameterizing convective memory, and the
ability of idealized tests to reveal shortcomings of convection schemes and constrain
model structural assumptions.
acknowledgement: YLH is supported by funding from the European Union's Horizon 2020
research and innovation programme under the Marie Skłodowska-Curie Grant Agreement
No. 101034413. CJM gratefully acknowledges funding from the European Research Council
under the European Union's Horizon 2020 research and innovation program (Project
CLUSTER, Grant Agreement No. 805041). YLH and SCS were supported by the Australian
Research Council (FL150100035). The authors thank Brian Mapes, David Fuchs and Siwon
Song for stimulating and helpful discussions. MC warmly thanks the LMD team in Paris
for their assistance with the LMDZ model. We thank the two anonymous reviewers for
their constructive comments that greatly improved this manuscript.
article_number: e2023MS003726
article_processing_charge: Yes
article_type: original
author:
- first_name: Yi-Ling
full_name: Hwong, Yi-Ling
id: 1217aa61-4dd1-11ec-9ac3-f2ba3f17ee22
last_name: Hwong
orcid: 0000-0001-9281-3479
- first_name: M.
full_name: Colin, M.
last_name: Colin
- first_name: Philipp
full_name: Aglas, Philipp
id: 02eace56-97fc-11ee-b81a-f0939ca85a77
last_name: Aglas
- first_name: Caroline J
full_name: Muller, Caroline J
id: f978ccb0-3f7f-11eb-b193-b0e2bd13182b
last_name: Muller
orcid: 0000-0001-5836-5350
- first_name: S. C.
full_name: Sherwood, S. C.
last_name: Sherwood
citation:
ama: Hwong Y-L, Colin M, Aglas P, Muller CJ, Sherwood SC. Assessing memory in convection
schemes using idealized tests. Journal of Advances in Modeling Earth Systems.
2023;15(12). doi:10.1029/2023MS003726
apa: Hwong, Y.-L., Colin, M., Aglas, P., Muller, C. J., & Sherwood, S. C. (2023).
Assessing memory in convection schemes using idealized tests. Journal of Advances
in Modeling Earth Systems. Wiley. https://doi.org/10.1029/2023MS003726
chicago: Hwong, Yi-Ling, M. Colin, Philipp Aglas, Caroline J Muller, and S. C. Sherwood.
“Assessing Memory in Convection Schemes Using Idealized Tests.” Journal of
Advances in Modeling Earth Systems. Wiley, 2023. https://doi.org/10.1029/2023MS003726.
ieee: Y.-L. Hwong, M. Colin, P. Aglas, C. J. Muller, and S. C. Sherwood, “Assessing
memory in convection schemes using idealized tests,” Journal of Advances in
Modeling Earth Systems, vol. 15, no. 12. Wiley, 2023.
ista: Hwong Y-L, Colin M, Aglas P, Muller CJ, Sherwood SC. 2023. Assessing memory
in convection schemes using idealized tests. Journal of Advances in Modeling Earth
Systems. 15(12), e2023MS003726.
mla: Hwong, Yi-Ling, et al. “Assessing Memory in Convection Schemes Using Idealized
Tests.” Journal of Advances in Modeling Earth Systems, vol. 15, no. 12,
e2023MS003726, Wiley, 2023, doi:10.1029/2023MS003726.
short: Y.-L. Hwong, M. Colin, P. Aglas, C.J. Muller, S.C. Sherwood, Journal of Advances
in Modeling Earth Systems 15 (2023).
date_created: 2023-12-10T23:00:57Z
date_published: 2023-12-01T00:00:00Z
date_updated: 2024-02-27T07:26:30Z
day: '01'
ddc:
- '550'
department:
- _id: CaMu
doi: 10.1029/2023MS003726
ec_funded: 1
file:
- access_level: open_access
checksum: 4d060b293da3d203de8769e398edf711
content_type: application/pdf
creator: dernst
date_created: 2023-12-11T08:08:44Z
date_updated: 2023-12-11T08:08:44Z
file_id: '14670'
file_name: 2023_JAMES_Hwong.pdf
file_size: 2783677
relation: main_file
success: 1
file_date_updated: 2023-12-11T08:08:44Z
has_accepted_license: '1'
intvolume: ' 15'
issue: '12'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-nd/4.0/
month: '12'
oa: 1
oa_version: Published Version
project:
- _id: 629205d8-2b32-11ec-9570-e1356ff73576
call_identifier: H2020
grant_number: '805041'
name: organization of CLoUdS, and implications of Tropical cyclones and for the
Energetics of the tropics, in current and waRming climate
publication: Journal of Advances in Modeling Earth Systems
publication_identifier:
eissn:
- 1942-2466
publication_status: published
publisher: Wiley
quality_controlled: '1'
related_material:
record:
- id: '14991'
relation: research_data
status: public
scopus_import: '1'
status: public
title: Assessing memory in convection schemes using idealized tests
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 15
year: '2023'
...
---
_id: '14752'
abstract:
- lang: eng
text: 'Radiative cooling of the lowest atmospheric levels is of strong importance
for modulating atmospheric circulations and organizing convection, but detailed
observations and a robust theoretical understanding are lacking. Here we use unprecedented
observational constraints from subsidence regimes in the tropical Atlantic to
develop a theory for the shape and magnitude of low‐level longwave radiative cooling
in clear‐sky, showing peaks larger than 5–10 K/day at the top of the boundary
layer. A suite of novel scaling approximations is first developed from simplified
spectral theory, in close agreement with the measurements. The radiative cooling
peak height is set by the maximum lapse rate in water vapor path, and its magnitude
is mainly controlled by the ratio of column relative humidity above and below
the peak. We emphasize how elevated intrusions of moist air can reduce low‐level
cooling, by sporadically shading the spectral range which effectively cools to
space. The efficiency of this spectral shading depends both on water content and
altitude of moist intrusions; its height dependence cannot be explained by the
temperature difference between the emitting and absorbing layers, but by the decrease
of water vapor extinction with altitude. This analytical work can help to narrow
the search for low‐level cloud patterns sensitive to radiative‐convective feedbacks:
the most organized patterns with largest cloud fractions occur in atmospheres
below 10% relative humidity and feel the strongest low‐level cooling. This motivates
further assessment of favorable conditions for radiative‐convective feedbacks
and a robust quantification of corresponding shallow cloud dynamics in current
and warmer climates.'
acknowledgement: The authors would like to thank two anonymous reviews and gratefully
acknowledge diverse funding agencies and resources used for this work. B.F. and
C.M. thank funding from the European Research Council (ERC) under the European Union's
Horizon 2020 research and innovation program (Project CLUSTER, grant agreement no.
805041), and the EUREC4A campaign organizers for giving the opportunity to take
part to the campaign and use the data early on. R. P. was supported by the US National
Science Foundation (award AGS 19–16908), by the National Oceanic and Atmospheric
Administration (award NA200AR4310375), and the Vetlesen Foundation.
article_number: e2023AV000880
article_processing_charge: Yes
article_type: original
author:
- first_name: B.
full_name: Fildier, B.
last_name: Fildier
- first_name: Caroline J
full_name: Muller, Caroline J
id: f978ccb0-3f7f-11eb-b193-b0e2bd13182b
last_name: Muller
orcid: 0000-0001-5836-5350
- first_name: R.
full_name: Pincus, R.
last_name: Pincus
- first_name: S.
full_name: Fueglistaler, S.
last_name: Fueglistaler
citation:
ama: Fildier B, Muller CJ, Pincus R, Fueglistaler S. How moisture shapes low‐level
radiative cooling in subsidence regimes. AGU Advances. 2023;4(3). doi:10.1029/2023av000880
apa: Fildier, B., Muller, C. J., Pincus, R., & Fueglistaler, S. (2023). How
moisture shapes low‐level radiative cooling in subsidence regimes. AGU Advances.
American Geophysical Union. https://doi.org/10.1029/2023av000880
chicago: Fildier, B., Caroline J Muller, R. Pincus, and S. Fueglistaler. “How Moisture
Shapes Low‐level Radiative Cooling in Subsidence Regimes.” AGU Advances.
American Geophysical Union, 2023. https://doi.org/10.1029/2023av000880.
ieee: B. Fildier, C. J. Muller, R. Pincus, and S. Fueglistaler, “How moisture shapes
low‐level radiative cooling in subsidence regimes,” AGU Advances, vol.
4, no. 3. American Geophysical Union, 2023.
ista: Fildier B, Muller CJ, Pincus R, Fueglistaler S. 2023. How moisture shapes
low‐level radiative cooling in subsidence regimes. AGU Advances. 4(3), e2023AV000880.
mla: Fildier, B., et al. “How Moisture Shapes Low‐level Radiative Cooling in Subsidence
Regimes.” AGU Advances, vol. 4, no. 3, e2023AV000880, American Geophysical
Union, 2023, doi:10.1029/2023av000880.
short: B. Fildier, C.J. Muller, R. Pincus, S. Fueglistaler, AGU Advances 4 (2023).
date_created: 2024-01-08T13:07:49Z
date_published: 2023-06-01T00:00:00Z
date_updated: 2024-01-09T08:54:03Z
day: '01'
ddc:
- '550'
department:
- _id: CaMu
doi: 10.1029/2023av000880
ec_funded: 1
file:
- access_level: open_access
checksum: af773220a9fa194c61a8dc2fae092c16
content_type: application/pdf
creator: dernst
date_created: 2024-01-09T08:51:25Z
date_updated: 2024-01-09T08:51:25Z
file_id: '14761'
file_name: 2023_AGUAdvances_Fildier.pdf
file_size: 24149551
relation: main_file
success: 1
file_date_updated: 2024-01-09T08:51:25Z
has_accepted_license: '1'
intvolume: ' 4'
issue: '3'
keyword:
- General Earth and Planetary Sciences
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
project:
- _id: 629205d8-2b32-11ec-9570-e1356ff73576
call_identifier: H2020
grant_number: '805041'
name: organization of CLoUdS, and implications of Tropical cyclones and for the
Energetics of the tropics, in current and waRming climate
publication: AGU Advances
publication_identifier:
eissn:
- 2576-604X
publication_status: published
publisher: American Geophysical Union
quality_controlled: '1'
scopus_import: '1'
status: public
title: How moisture shapes low‐level radiative cooling in subsidence regimes
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 4
year: '2023'
...
---
_id: '10656'
abstract:
- lang: eng
text: Idealized simulations of the tropical atmosphere have predicted that clouds
can spontaneously clump together in space, despite perfectly homogeneous settings.
This phenomenon has been called self-aggregation, and it results in a state where
a moist cloudy region with intense deep convective storms is surrounded by extremely
dry subsiding air devoid of deep clouds. We review here the main findings from
theoretical work and idealized models of this phenomenon, highlighting the physical
processes believed to play a key role in convective self-aggregation. We also
review the growing literature on the importance and implications of this phenomenon
for the tropical atmosphere, notably, for the hydrological cycle and for precipitation
extremes, in our current and in a warming climate.
acknowledgement: C.M. gratefully acknowledges funding from the European Research Council
(ERC) under the European Union's Horizon 2020 research and innovation program (Project
CLUSTER, grant agreement 805041). She also thanks Grand Équipement National de Calcul
Intensif (GENCI), France, for providing access to their computing platforms at Très
Grand Centre de Calcul (TGCC). J.O.H. gratefully acknowledges funding from the Villum
Foundation (grant 13168), the ERC under the Horizon 2020 research and innovation
program (grant 771859), and the Novo Nordisk Foundation's Interdisciplinary Synergy
Program (grant NNF19OC0057374). G.C. gratefully acknowledges the support of the
transregional collaborative research center (SFB/TRR 165) “Waves to Weather” (http://www.wavestoweather.de)
funded by the German Research Foundation (DFG). D.Y. is supported by a Packard Fellowship
in Science and Engineering, the France–Berkeley Fund, Laboratory Directed Research
and Development (LDRD) funding from the Lawrence Berkeley National Laboratory, and
the US Department of Energy, Office of Science, Office of Biological and Environmental
Research, Climate and Environmental Sciences Division, Regional and Global Climate
Modeling Program under award DE-AC02-05CH11231.
article_processing_charge: No
article_type: original
author:
- first_name: Caroline J
full_name: Muller, Caroline J
id: f978ccb0-3f7f-11eb-b193-b0e2bd13182b
last_name: Muller
orcid: 0000-0001-5836-5350
- first_name: Da
full_name: Yang, Da
last_name: Yang
- first_name: George
full_name: Craig, George
last_name: Craig
- first_name: Timothy
full_name: Cronin, Timothy
last_name: Cronin
- first_name: Benjamin
full_name: Fildier, Benjamin
last_name: Fildier
- first_name: Jan O.
full_name: Haerter, Jan O.
last_name: Haerter
- first_name: Cathy
full_name: Hohenegger, Cathy
last_name: Hohenegger
- first_name: Brian
full_name: Mapes, Brian
last_name: Mapes
- first_name: David
full_name: Randall, David
last_name: Randall
- first_name: Sara
full_name: Shamekh, Sara
last_name: Shamekh
- first_name: Steven C.
full_name: Sherwood, Steven C.
last_name: Sherwood
citation:
ama: Muller CJ, Yang D, Craig G, et al. Spontaneous aggregation of convective storms.
Annual Review of Fluid Mechanics. 2022;54:133-157. doi:10.1146/annurev-fluid-022421-011319
apa: Muller, C. J., Yang, D., Craig, G., Cronin, T., Fildier, B., Haerter, J. O.,
… Sherwood, S. C. (2022). Spontaneous aggregation of convective storms. Annual
Review of Fluid Mechanics. Annual Reviews. https://doi.org/10.1146/annurev-fluid-022421-011319
chicago: Muller, Caroline J, Da Yang, George Craig, Timothy Cronin, Benjamin Fildier,
Jan O. Haerter, Cathy Hohenegger, et al. “Spontaneous Aggregation of Convective
Storms.” Annual Review of Fluid Mechanics. Annual Reviews, 2022. https://doi.org/10.1146/annurev-fluid-022421-011319.
ieee: C. J. Muller et al., “Spontaneous aggregation of convective storms,”
Annual Review of Fluid Mechanics, vol. 54. Annual Reviews, pp. 133–157,
2022.
ista: Muller CJ, Yang D, Craig G, Cronin T, Fildier B, Haerter JO, Hohenegger C,
Mapes B, Randall D, Shamekh S, Sherwood SC. 2022. Spontaneous aggregation of convective
storms. Annual Review of Fluid Mechanics. 54, 133–157.
mla: Muller, Caroline J., et al. “Spontaneous Aggregation of Convective Storms.”
Annual Review of Fluid Mechanics, vol. 54, Annual Reviews, 2022, pp. 133–57,
doi:10.1146/annurev-fluid-022421-011319.
short: C.J. Muller, D. Yang, G. Craig, T. Cronin, B. Fildier, J.O. Haerter, C. Hohenegger,
B. Mapes, D. Randall, S. Shamekh, S.C. Sherwood, Annual Review of Fluid Mechanics
54 (2022) 133–157.
date_created: 2022-01-23T23:01:29Z
date_published: 2022-01-01T00:00:00Z
date_updated: 2023-10-03T10:51:07Z
day: '01'
department:
- _id: CaMu
doi: 10.1146/annurev-fluid-022421-011319
ec_funded: 1
external_id:
isi:
- '000794152800006'
intvolume: ' 54'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1146/annurev-fluid-022421-011319
month: '01'
oa: 1
oa_version: Published Version
page: 133-157
project:
- _id: 629205d8-2b32-11ec-9570-e1356ff73576
call_identifier: H2020
grant_number: '805041'
name: organization of CLoUdS, and implications of Tropical cyclones and for the
Energetics of the tropics, in current and waRming climate
publication: Annual Review of Fluid Mechanics
publication_identifier:
eissn:
- 1545-4479
issn:
- 0066-4189
publication_status: published
publisher: Annual Reviews
quality_controlled: '1'
scopus_import: '1'
status: public
title: Spontaneous aggregation of convective storms
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 54
year: '2022'
...
---
_id: '10653'
abstract:
- lang: eng
text: Squall lines are known to be the consequence of the interaction of low-level
shear with cold pools associated with convective downdrafts. Also, as the magnitude
of the shear increases beyond a critical shear, squall lines tend to orient themselves.
The existing literature suggests that this orientation reduces incoming wind shear
to the squall line, and maintains equilibrium between wind shear and cold pool
spreading. Although this theory is widely accepted, very few quantitative studies
have been conducted on supercritical regime especially. Here, we test this hypothesis
with tropical squall lines obtained by imposing a vertical wind shear in cloud
resolving simulations in radiative convective equilibrium. In the sub-critical
regime, squall lines are perpendicular to the shear. In the super-critical regime,
their orientation maintain the equilibrium, supporting existing theories. We also
find that as shear increases, cold pools become more intense. However, this intensification
has little impact on squall line orientation.
acknowledgement: The authors gratefully acknowledge funding from the European Research
Council (ERC) under the European Union's Horizon 2020 research and innovation program
(Project CLUSTER, Grant Agreement No. 805041), and from the PhD fellowship of Ecole
Normale Supérieure de Paris-Saclay. Two supplementary movies are also provided showing
the angle detection method and the squall line of the Usfc = 10 m s−1 simulation.
article_number: e2021GL095184
article_processing_charge: No
article_type: original
author:
- first_name: Sophie
full_name: Abramian, Sophie
last_name: Abramian
- first_name: Caroline J
full_name: Muller, Caroline J
id: f978ccb0-3f7f-11eb-b193-b0e2bd13182b
last_name: Muller
orcid: 0000-0001-5836-5350
- first_name: Camille
full_name: Risi, Camille
last_name: Risi
citation:
ama: Abramian S, Muller CJ, Risi C. Shear-convection interactions and orientation
of tropical squall lines. Geophysical Research Letters. 2022;49(1). doi:10.1029/2021GL095184
apa: Abramian, S., Muller, C. J., & Risi, C. (2022). Shear-convection interactions
and orientation of tropical squall lines. Geophysical Research Letters.
Wiley. https://doi.org/10.1029/2021GL095184
chicago: Abramian, Sophie, Caroline J Muller, and Camille Risi. “Shear-Convection
Interactions and Orientation of Tropical Squall Lines.” Geophysical Research
Letters. Wiley, 2022. https://doi.org/10.1029/2021GL095184.
ieee: S. Abramian, C. J. Muller, and C. Risi, “Shear-convection interactions and
orientation of tropical squall lines,” Geophysical Research Letters, vol.
49, no. 1. Wiley, 2022.
ista: Abramian S, Muller CJ, Risi C. 2022. Shear-convection interactions and orientation
of tropical squall lines. Geophysical Research Letters. 49(1), e2021GL095184.
mla: Abramian, Sophie, et al. “Shear-Convection Interactions and Orientation of
Tropical Squall Lines.” Geophysical Research Letters, vol. 49, no. 1, e2021GL095184,
Wiley, 2022, doi:10.1029/2021GL095184.
short: S. Abramian, C.J. Muller, C. Risi, Geophysical Research Letters 49 (2022).
date_created: 2022-01-23T23:01:27Z
date_published: 2022-01-16T00:00:00Z
date_updated: 2023-08-02T14:00:17Z
day: '16'
ddc:
- '550'
department:
- _id: CaMu
doi: 10.1029/2021GL095184
ec_funded: 1
external_id:
isi:
- '000743989800040'
file:
- access_level: open_access
checksum: 08f88b57b8e409b42e382452cd5f297b
content_type: application/pdf
creator: cchlebak
date_created: 2022-01-24T12:14:41Z
date_updated: 2022-01-24T12:14:41Z
file_id: '10662'
file_name: 2022_GeophysResearchLet_Abramian.pdf
file_size: 1117408
relation: main_file
success: 1
file_date_updated: 2022-01-24T12:14:41Z
has_accepted_license: '1'
intvolume: ' 49'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
project:
- _id: 629205d8-2b32-11ec-9570-e1356ff73576
call_identifier: H2020
grant_number: '805041'
name: organization of CLoUdS, and implications of Tropical cyclones and for the
Energetics of the tropics, in current and waRming climate
publication: Geophysical Research Letters
publication_identifier:
eissn:
- 1944-8007
issn:
- 0094-8276
publication_status: published
publisher: Wiley
quality_controlled: '1'
related_material:
link:
- relation: earlier_version
url: https://doi.org/10.1002/essoar.10507697.1
scopus_import: '1'
status: public
title: Shear-convection interactions and orientation of tropical squall lines
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: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 49
year: '2022'
...