Understanding changes in cloud simulations from E3SM version 1 to version 2
This study documents clouds simulated by the Energy Exascale Earth System Model (E3SM) version 2 (E3SMv2) and attempts to understand what causes the model behavior change in clouds relative to E3SMv1. This is done by analyzing the last 30-year (1985–2014) data from the 165-year historical simulation...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070933 2024-02-11T10:08:53+01:00 Understanding changes in cloud simulations from E3SM version 1 to version 2 Zhang, Yuying Xie, Shaocheng Qin, Yi Lin, Wuyin Golaz, Jean-Christophe Zheng, Xue Ma, Po-Lun Qian, Yun Tang, Qi Terai, Christopher R. Zhang, Meng 2024-01 electronic https://doi.org/10.5194/gmd-17-169-2024 https://noa.gwlb.de/receive/cop_mods_00070933 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069257/gmd-17-169-2024.pdf https://gmd.copernicus.org/articles/17/169/2024/gmd-17-169-2024.pdf eng eng Copernicus Publications Geoscientific Model Development -- http://www.bibliothek.uni-regensburg.de/ezeit/?2456725 -- http://www.geosci-model-dev.net/ -- 1991-9603 https://doi.org/10.5194/gmd-17-169-2024 https://noa.gwlb.de/receive/cop_mods_00070933 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069257/gmd-17-169-2024.pdf https://gmd.copernicus.org/articles/17/169/2024/gmd-17-169-2024.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/gmd-17-169-2024 2024-01-15T00:22:44Z This study documents clouds simulated by the Energy Exascale Earth System Model (E3SM) version 2 (E3SMv2) and attempts to understand what causes the model behavior change in clouds relative to E3SMv1. This is done by analyzing the last 30-year (1985–2014) data from the 165-year historical simulations using E3SMv1 and v2 and four sensitivity tests to isolate the impact of changes in model parameter choices in its turbulence, shallow convection, and cloud macrophysics parameterization (Cloud Layers Unified By Binormals, CLUBB); microphysical parameterization (MG2); and deep-convection scheme (ZM), as well as model physics changes in convective triggering. It is shown that E3SMv2 significantly improves the simulation of subtropical coastal stratocumulus clouds and clouds with optical depth larger than 3.6 over the stratocumulus-to-cumulus transition regimes, where the shortwave cloud radiative effect (SWCRE) is also improved, and the Southern Ocean (SO) while seeing an overall slight degradation in low clouds over other tropical and subtropical oceans. The better performance in E3SMv1 over those regions is partially due to error compensation between its simulated optically thin and intermediate low clouds for which E3SMv2 actually improves simulation of optically intermediate low clouds. Sensitivity tests indicate that the changes in low clouds are primarily due to the tuning done in CLUBB. The impact of the ZM tuning is mainly on optically intermediate and thick high clouds, contributing to an improved SWCRE and longwave cloud radiative effect (LWCRE). The impact of the MG2 tuning and the new convective trigger is primarily on the high latitudes and the SO. They have a relatively smaller impact on clouds than CLUBB tuning and ZM tuning do. This study offers additional insights into clouds simulated in E3SMv2 by utilizing multiple data sets and the Cloud Feedback Model Intercomparison Project (CFMIP) Observation Simulator Package (COSP) diagnostic tool as well as sensitivity tests. The improved understanding will ... Article in Journal/Newspaper Southern Ocean Niedersächsisches Online-Archiv NOA Southern Ocean Geoscientific Model Development 17 1 169 189 |
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article Verlagsveröffentlichung Zhang, Yuying Xie, Shaocheng Qin, Yi Lin, Wuyin Golaz, Jean-Christophe Zheng, Xue Ma, Po-Lun Qian, Yun Tang, Qi Terai, Christopher R. Zhang, Meng Understanding changes in cloud simulations from E3SM version 1 to version 2 |
topic_facet |
article Verlagsveröffentlichung |
description |
This study documents clouds simulated by the Energy Exascale Earth System Model (E3SM) version 2 (E3SMv2) and attempts to understand what causes the model behavior change in clouds relative to E3SMv1. This is done by analyzing the last 30-year (1985–2014) data from the 165-year historical simulations using E3SMv1 and v2 and four sensitivity tests to isolate the impact of changes in model parameter choices in its turbulence, shallow convection, and cloud macrophysics parameterization (Cloud Layers Unified By Binormals, CLUBB); microphysical parameterization (MG2); and deep-convection scheme (ZM), as well as model physics changes in convective triggering. It is shown that E3SMv2 significantly improves the simulation of subtropical coastal stratocumulus clouds and clouds with optical depth larger than 3.6 over the stratocumulus-to-cumulus transition regimes, where the shortwave cloud radiative effect (SWCRE) is also improved, and the Southern Ocean (SO) while seeing an overall slight degradation in low clouds over other tropical and subtropical oceans. The better performance in E3SMv1 over those regions is partially due to error compensation between its simulated optically thin and intermediate low clouds for which E3SMv2 actually improves simulation of optically intermediate low clouds. Sensitivity tests indicate that the changes in low clouds are primarily due to the tuning done in CLUBB. The impact of the ZM tuning is mainly on optically intermediate and thick high clouds, contributing to an improved SWCRE and longwave cloud radiative effect (LWCRE). The impact of the MG2 tuning and the new convective trigger is primarily on the high latitudes and the SO. They have a relatively smaller impact on clouds than CLUBB tuning and ZM tuning do. This study offers additional insights into clouds simulated in E3SMv2 by utilizing multiple data sets and the Cloud Feedback Model Intercomparison Project (CFMIP) Observation Simulator Package (COSP) diagnostic tool as well as sensitivity tests. The improved understanding will ... |
format |
Article in Journal/Newspaper |
author |
Zhang, Yuying Xie, Shaocheng Qin, Yi Lin, Wuyin Golaz, Jean-Christophe Zheng, Xue Ma, Po-Lun Qian, Yun Tang, Qi Terai, Christopher R. Zhang, Meng |
author_facet |
Zhang, Yuying Xie, Shaocheng Qin, Yi Lin, Wuyin Golaz, Jean-Christophe Zheng, Xue Ma, Po-Lun Qian, Yun Tang, Qi Terai, Christopher R. Zhang, Meng |
author_sort |
Zhang, Yuying |
title |
Understanding changes in cloud simulations from E3SM version 1 to version 2 |
title_short |
Understanding changes in cloud simulations from E3SM version 1 to version 2 |
title_full |
Understanding changes in cloud simulations from E3SM version 1 to version 2 |
title_fullStr |
Understanding changes in cloud simulations from E3SM version 1 to version 2 |
title_full_unstemmed |
Understanding changes in cloud simulations from E3SM version 1 to version 2 |
title_sort |
understanding changes in cloud simulations from e3sm version 1 to version 2 |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/gmd-17-169-2024 https://noa.gwlb.de/receive/cop_mods_00070933 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069257/gmd-17-169-2024.pdf https://gmd.copernicus.org/articles/17/169/2024/gmd-17-169-2024.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Geoscientific Model Development -- http://www.bibliothek.uni-regensburg.de/ezeit/?2456725 -- http://www.geosci-model-dev.net/ -- 1991-9603 https://doi.org/10.5194/gmd-17-169-2024 https://noa.gwlb.de/receive/cop_mods_00070933 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069257/gmd-17-169-2024.pdf https://gmd.copernicus.org/articles/17/169/2024/gmd-17-169-2024.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/gmd-17-169-2024 |
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Geoscientific Model Development |
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189 |
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