--- _id: '9151' abstract: - lang: eng text: "We investigate how mesoscale circulations associated with convective aggregation can modulate the sensitivity of the hydrologic cycle to warming. We quantify changes in the full distribution of rain across radiative‐convective equilibrium states in a cloud‐resolving model. For a given SST, the shift in mean rainfall between disorganized and organized states is associated with a shift in atmospheric radiative cooling, and is roughly analogous to the effect of a 4K SST increase. With rising temperatures, the increase in mean rain rate is insensitive to the presence of organization, while extremes can intensify faster in the aggregated state, leading to a faster amplification in the sporadic nature of rain. When convection aggregates, heavy rain is enhanced by 20‐30% and nonlinear behaviors are observed as a function of SST and strength of aggregation feedbacks. First, radiative‐ and surface‐flux aggregation feedbacks have multiplicative effects on extremes, illustrating a non‐trivial sensitivity to the degree of organization. Second, alternating Clausius‐Clapeyron and super‐Clausius‐Clapeyron regimes in extreme rainfall are found as a function of SST, corresponding to varying thermodynamic and dynamic contributions, and a large sensitivity to precipitation efficiency variations in some SST ranges.\r\nThe potential for mesoscale circulations in amplifying the hydrologic cycle is established. However these nonlinear distortions question the quantitative relevance of idealized self‐aggregation. This calls for a deeper investigation of relationships which capture the coupling between global energetics, aggregation feedbacks and local convection, and for systematic tests of their sensitivity to domain configurations, surface boundary conditions, microphysics and turbulence schemes." article_number: e2020MS002256 article_processing_charge: No article_type: original author: - first_name: Benjamin full_name: Fildier, Benjamin last_name: Fildier - first_name: William D. full_name: Collins, William D. last_name: Collins - 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: Fildier B, Collins WD, Muller CJ. Distortions of the rain distribution with warming, with and without self‐aggregation. Journal of Advances in Modeling Earth Systems. 2021;13(2). doi:10.1029/2020ms002256 apa: Fildier, B., Collins, W. D., & Muller, C. J. (2021). Distortions of the rain distribution with warming, with and without self‐aggregation. Journal of Advances in Modeling Earth Systems. American Geophysical Union. https://doi.org/10.1029/2020ms002256 chicago: Fildier, Benjamin, William D. Collins, and Caroline J Muller. “Distortions of the Rain Distribution with Warming, with and without Self‐aggregation.” Journal of Advances in Modeling Earth Systems. American Geophysical Union, 2021. https://doi.org/10.1029/2020ms002256. ieee: B. Fildier, W. D. Collins, and C. J. Muller, “Distortions of the rain distribution with warming, with and without self‐aggregation,” Journal of Advances in Modeling Earth Systems, vol. 13, no. 2. American Geophysical Union, 2021. ista: Fildier B, Collins WD, Muller CJ. 2021. Distortions of the rain distribution with warming, with and without self‐aggregation. Journal of Advances in Modeling Earth Systems. 13(2), e2020MS002256. mla: Fildier, Benjamin, et al. “Distortions of the Rain Distribution with Warming, with and without Self‐aggregation.” Journal of Advances in Modeling Earth Systems, vol. 13, no. 2, e2020MS002256, American Geophysical Union, 2021, doi:10.1029/2020ms002256. short: B. Fildier, W.D. Collins, C.J. Muller, Journal of Advances in Modeling Earth Systems 13 (2021). date_created: 2021-02-15T15:10:01Z date_published: 2021-02-01T00:00:00Z date_updated: 2022-01-24T12:26:01Z day: '01' ddc: - '550' doi: 10.1029/2020ms002256 extern: '1' file: - access_level: open_access checksum: 591ce69b7a36f24346d2061ac712f0f4 content_type: application/pdf creator: kschuh date_created: 2021-08-11T12:23:01Z date_updated: 2021-08-11T12:23:01Z file_id: '9881' file_name: 2021_JAMES_Fildier.pdf file_size: 1947936 relation: main_file success: 1 file_date_updated: 2021-08-11T12:23:01Z has_accepted_license: '1' intvolume: ' 13' issue: '2' keyword: - Global and Planetary Change - General Earth and Planetary Sciences - Environmental Chemistry language: - iso: eng license: https://creativecommons.org/licenses/by-nc/4.0/ month: '02' oa: 1 oa_version: Published Version publication: Journal of Advances in Modeling Earth Systems publication_identifier: issn: - 1942-2466 - 1942-2466 publication_status: published publisher: American Geophysical Union quality_controlled: '1' scopus_import: '1' status: public title: Distortions of the rain distribution with warming, with and without self‐aggregation tmp: image: /images/cc_by_nc.png legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) short: CC BY-NC (4.0) type: journal_article user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 13 year: '2021' ... --- _id: '9125' abstract: - lang: eng text: This study investigates the feedbacks between an interactive sea surface temperature (SST) and the self‐aggregation of deep convective clouds, using a cloud‐resolving model in nonrotating radiative‐convective equilibrium. The ocean is modeled as one layer slab with a temporally fixed mean but spatially varying temperature. We find that the interactive SST decelerates the aggregation and that the deceleration is larger with a shallower slab, consistent with earlier studies. The surface temperature anomaly in dry regions is positive at first, thus opposing the diverging shallow circulation known to favor self‐aggregation, consistent with the slower aggregation. But surprisingly, the driest columns then have a negative SST anomaly, thus strengthening the diverging shallow circulation and favoring aggregation. This diverging circulation out of dry regions is found to be well correlated with the aggregation speed. It can be linked to a positive surface pressure anomaly (PSFC), itself the consequence of SST anomalies and boundary layer radiative cooling. The latter cools and dries the boundary layer, thus increasing PSFC anomalies through virtual effects and hydrostasy. Sensitivity experiments confirm the key role played by boundary layer radiative cooling in determining PSFC anomalies in dry regions, and thus the shallow diverging circulation and the aggregation speed. article_number: e2020MS002164 article_processing_charge: No article_type: original author: - first_name: S. full_name: Shamekh, S. last_name: Shamekh - 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: J.‐P. full_name: Duvel, J.‐P. last_name: Duvel - first_name: F. full_name: D'Andrea, F. last_name: D'Andrea citation: ama: Shamekh S, Muller CJ, Duvel J ‐P., D’Andrea F. Self‐aggregation of convective clouds with interactive sea surface temperature. Journal of Advances in Modeling Earth Systems. 2020;12(11). doi:10.1029/2020ms002164 apa: Shamekh, S., Muller, C. J., Duvel, J. ‐P., & D’Andrea, F. (2020). Self‐aggregation of convective clouds with interactive sea surface temperature. Journal of Advances in Modeling Earth Systems. American Geophysical Union. https://doi.org/10.1029/2020ms002164 chicago: Shamekh, S., Caroline J Muller, J.‐P. Duvel, and F. D’Andrea. “Self‐aggregation of Convective Clouds with Interactive Sea Surface Temperature.” Journal of Advances in Modeling Earth Systems. American Geophysical Union, 2020. https://doi.org/10.1029/2020ms002164. ieee: S. Shamekh, C. J. Muller, J. ‐P. Duvel, and F. D’Andrea, “Self‐aggregation of convective clouds with interactive sea surface temperature,” Journal of Advances in Modeling Earth Systems, vol. 12, no. 11. American Geophysical Union, 2020. ista: Shamekh S, Muller CJ, Duvel J ‐P., D’Andrea F. 2020. Self‐aggregation of convective clouds with interactive sea surface temperature. Journal of Advances in Modeling Earth Systems. 12(11), e2020MS002164. mla: Shamekh, S., et al. “Self‐aggregation of Convective Clouds with Interactive Sea Surface Temperature.” Journal of Advances in Modeling Earth Systems, vol. 12, no. 11, e2020MS002164, American Geophysical Union, 2020, doi:10.1029/2020ms002164. short: S. Shamekh, C.J. Muller, J. ‐P. Duvel, F. D’Andrea, Journal of Advances in Modeling Earth Systems 12 (2020). date_created: 2021-02-15T14:06:23Z date_published: 2020-11-01T00:00:00Z date_updated: 2022-01-24T12:27:38Z day: '01' doi: 10.1029/2020ms002164 extern: '1' intvolume: ' 12' issue: '11' keyword: - Global and Planetary Change - General Earth and Planetary Sciences - Environmental Chemistry language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1029/2020MS002164 month: '11' oa: 1 oa_version: Published Version publication: Journal of Advances in Modeling Earth Systems publication_identifier: issn: - 1942-2466 - 1942-2466 publication_status: published publisher: American Geophysical Union quality_controlled: '1' status: public title: Self‐aggregation of convective clouds with interactive sea surface temperature type: journal_article user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 12 year: '2020' ... --- _id: '9126' abstract: - lang: eng text: The goal of this study is to understand the mechanisms controlling the isotopic composition of the water vapor near the surface of tropical oceans, at the scale of about a hundred kilometers and a month. In the tropics, it has long been observed that the isotopic compositions of rain and vapor near the surface are more depleted when the precipitation rate is high. This is called the “amount effect.” Previous studies, based on observations or models with parameterized convection, have highlighted the roles of deep convective and mesoscale downdrafts and rain evaporation. But the relative importance of these processes has never been quantified. We hypothesize that it can be quantified using an analytical model constrained by large‐eddy simulations. Results from large‐eddy simulations confirm that the classical amount effect can be simulated only if precipitation rate changes result from changes in the large‐scale circulation. We find that the main process depleting the water vapor compared to the equilibrium with the ocean is the fact that updrafts stem from areas where the water vapor is more enriched. The main process responsible for the amount effect is the fact that when the large‐scale ascent increases, isotopic vertical gradients are steeper, so that updrafts and downdrafts deplete the subcloud layer more efficiently. article_number: e2020MS002106 article_processing_charge: No article_type: original author: - first_name: Camille full_name: Risi, Camille last_name: Risi - 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: Peter full_name: Blossey, Peter last_name: Blossey citation: ama: Risi C, Muller CJ, Blossey P. What controls the water vapor isotopic composition near the surface of tropical oceans? Results from an analytical model constrained by large‐eddy simulations. Journal of Advances in Modeling Earth Systems. 2020;12(8). doi:10.1029/2020ms002106 apa: Risi, C., Muller, C. J., & Blossey, P. (2020). What controls the water vapor isotopic composition near the surface of tropical oceans? Results from an analytical model constrained by large‐eddy simulations. Journal of Advances in Modeling Earth Systems. American Geophysical Union. https://doi.org/10.1029/2020ms002106 chicago: Risi, Camille, Caroline J Muller, and Peter Blossey. “What Controls the Water Vapor Isotopic Composition near the Surface of Tropical Oceans? Results from an Analytical Model Constrained by Large‐eddy Simulations.” Journal of Advances in Modeling Earth Systems. American Geophysical Union, 2020. https://doi.org/10.1029/2020ms002106. ieee: C. Risi, C. J. Muller, and P. Blossey, “What controls the water vapor isotopic composition near the surface of tropical oceans? Results from an analytical model constrained by large‐eddy simulations,” Journal of Advances in Modeling Earth Systems, vol. 12, no. 8. American Geophysical Union, 2020. ista: Risi C, Muller CJ, Blossey P. 2020. What controls the water vapor isotopic composition near the surface of tropical oceans? Results from an analytical model constrained by large‐eddy simulations. Journal of Advances in Modeling Earth Systems. 12(8), e2020MS002106. mla: Risi, Camille, et al. “What Controls the Water Vapor Isotopic Composition near the Surface of Tropical Oceans? Results from an Analytical Model Constrained by Large‐eddy Simulations.” Journal of Advances in Modeling Earth Systems, vol. 12, no. 8, e2020MS002106, American Geophysical Union, 2020, doi:10.1029/2020ms002106. short: C. Risi, C.J. Muller, P. Blossey, Journal of Advances in Modeling Earth Systems 12 (2020). date_created: 2021-02-15T14:06:38Z date_published: 2020-08-01T00:00:00Z date_updated: 2022-01-24T12:28:12Z day: '01' doi: 10.1029/2020ms002106 extern: '1' intvolume: ' 12' issue: '8' keyword: - Global and Planetary Change - General Earth and Planetary Sciences - Environmental Chemistry language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1029/2020MS002106 month: '08' oa: 1 oa_version: Published Version publication: Journal of Advances in Modeling Earth Systems publication_identifier: issn: - 1942-2466 - 1942-2466 publication_status: published publisher: American Geophysical Union quality_controlled: '1' status: public title: What controls the water vapor isotopic composition near the surface of tropical oceans? Results from an analytical model constrained by large‐eddy simulations type: journal_article user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 12 year: '2020' ...