Southern Ocean Solar Reflection Biases in CMIP6 Models Linked to Cloud Phase and Vertical Structure Representations
International audience Over the Southern Ocean (SO, 40°S–70°S), climate models have consistently underestimated solar reflection. Here we evaluate the relationship between cloud profiles, cloud phase and radiation over the SO in Coupled Model Intercomparison Project Phase 6 (CMIP6) models against Cl...
Published in: | Geophysical Research Letters |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03872791 https://hal-insu.archives-ouvertes.fr/insu-03872791/document https://hal-insu.archives-ouvertes.fr/insu-03872791/file/Geophysical%20Research%20Letters%20-%202022%20-%20Cesana%20-%20Southern%20Ocean%20Solar%20Reflection%20Biases%20in%20CMIP6%20Models%20Linked%20to%20Cloud%20Phase.pdf https://doi.org/10.1029/2022GL099777 |
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ftunivnantes:oai:HAL:insu-03872791v1 2023-05-15T18:24:57+02:00 Southern Ocean Solar Reflection Biases in CMIP6 Models Linked to Cloud Phase and Vertical Structure Representations Cesana, Grégory, Khadir, Théodore Chepfer, Hélène Chiriaco, Marjolaine Center for Climate Systems Research New York (CCSR) Columbia University New York NASA Goddard Institute for Space Studies (GISS) NASA Goddard Space Flight Center (GSFC) Bolin Centre for Climate Research Stockholm University Department of Applied Environmental Science Stockholm (ITM) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2022-11-28 https://hal-insu.archives-ouvertes.fr/insu-03872791 https://hal-insu.archives-ouvertes.fr/insu-03872791/document https://hal-insu.archives-ouvertes.fr/insu-03872791/file/Geophysical%20Research%20Letters%20-%202022%20-%20Cesana%20-%20Southern%20Ocean%20Solar%20Reflection%20Biases%20in%20CMIP6%20Models%20Linked%20to%20Cloud%20Phase.pdf https://doi.org/10.1029/2022GL099777 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL099777 insu-03872791 https://hal-insu.archives-ouvertes.fr/insu-03872791 https://hal-insu.archives-ouvertes.fr/insu-03872791/document https://hal-insu.archives-ouvertes.fr/insu-03872791/file/Geophysical%20Research%20Letters%20-%202022%20-%20Cesana%20-%20Southern%20Ocean%20Solar%20Reflection%20Biases%20in%20CMIP6%20Models%20Linked%20to%20Cloud%20Phase.pdf doi:10.1029/2022GL099777 ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-03872791 Geophysical Research Letters, 2022, 49 (22), pp.e2022GL099777. ⟨10.1029/2022GL099777⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1029/2022GL099777 2023-01-10T23:52:42Z International audience Over the Southern Ocean (SO, 40°S–70°S), climate models have consistently underestimated solar reflection. Here we evaluate the relationship between cloud profiles, cloud phase and radiation over the SO in Coupled Model Intercomparison Project Phase 6 (CMIP6) models against Clouds and the Earth's Radiant Energy System and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations. We find that the lack of solar reflection is slightly improved in CMIP6 models compared to CMIP5's, attributable to a better representation of cloud fraction and phase. We show that clouds have a different vertical structure and radiative effect south and north of where the 0°C isotherm meets the surface (∼55°S). Although the models capture the greater vertical extent of clouds south of 55°S, they fail to reproduce the observed increase in solar reflection, which we pinpoint to cloud phase biases. Increasing CMIP6 supercooled liquid cloud opacity should help reduce their persistent shortwave biases. Article in Journal/Newspaper Southern Ocean Université de Nantes: HAL-UNIV-NANTES Southern Ocean Geophysical Research Letters 49 22 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Cesana, Grégory, Khadir, Théodore Chepfer, Hélène Chiriaco, Marjolaine Southern Ocean Solar Reflection Biases in CMIP6 Models Linked to Cloud Phase and Vertical Structure Representations |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience Over the Southern Ocean (SO, 40°S–70°S), climate models have consistently underestimated solar reflection. Here we evaluate the relationship between cloud profiles, cloud phase and radiation over the SO in Coupled Model Intercomparison Project Phase 6 (CMIP6) models against Clouds and the Earth's Radiant Energy System and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations. We find that the lack of solar reflection is slightly improved in CMIP6 models compared to CMIP5's, attributable to a better representation of cloud fraction and phase. We show that clouds have a different vertical structure and radiative effect south and north of where the 0°C isotherm meets the surface (∼55°S). Although the models capture the greater vertical extent of clouds south of 55°S, they fail to reproduce the observed increase in solar reflection, which we pinpoint to cloud phase biases. Increasing CMIP6 supercooled liquid cloud opacity should help reduce their persistent shortwave biases. |
author2 |
Center for Climate Systems Research New York (CCSR) Columbia University New York NASA Goddard Institute for Space Studies (GISS) NASA Goddard Space Flight Center (GSFC) Bolin Centre for Climate Research Stockholm University Department of Applied Environmental Science Stockholm (ITM) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Cesana, Grégory, Khadir, Théodore Chepfer, Hélène Chiriaco, Marjolaine |
author_facet |
Cesana, Grégory, Khadir, Théodore Chepfer, Hélène Chiriaco, Marjolaine |
author_sort |
Cesana, Grégory, |
title |
Southern Ocean Solar Reflection Biases in CMIP6 Models Linked to Cloud Phase and Vertical Structure Representations |
title_short |
Southern Ocean Solar Reflection Biases in CMIP6 Models Linked to Cloud Phase and Vertical Structure Representations |
title_full |
Southern Ocean Solar Reflection Biases in CMIP6 Models Linked to Cloud Phase and Vertical Structure Representations |
title_fullStr |
Southern Ocean Solar Reflection Biases in CMIP6 Models Linked to Cloud Phase and Vertical Structure Representations |
title_full_unstemmed |
Southern Ocean Solar Reflection Biases in CMIP6 Models Linked to Cloud Phase and Vertical Structure Representations |
title_sort |
southern ocean solar reflection biases in cmip6 models linked to cloud phase and vertical structure representations |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03872791 https://hal-insu.archives-ouvertes.fr/insu-03872791/document https://hal-insu.archives-ouvertes.fr/insu-03872791/file/Geophysical%20Research%20Letters%20-%202022%20-%20Cesana%20-%20Southern%20Ocean%20Solar%20Reflection%20Biases%20in%20CMIP6%20Models%20Linked%20to%20Cloud%20Phase.pdf https://doi.org/10.1029/2022GL099777 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-03872791 Geophysical Research Letters, 2022, 49 (22), pp.e2022GL099777. ⟨10.1029/2022GL099777⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL099777 insu-03872791 https://hal-insu.archives-ouvertes.fr/insu-03872791 https://hal-insu.archives-ouvertes.fr/insu-03872791/document https://hal-insu.archives-ouvertes.fr/insu-03872791/file/Geophysical%20Research%20Letters%20-%202022%20-%20Cesana%20-%20Southern%20Ocean%20Solar%20Reflection%20Biases%20in%20CMIP6%20Models%20Linked%20to%20Cloud%20Phase.pdf doi:10.1029/2022GL099777 |
op_doi |
https://doi.org/10.1029/2022GL099777 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
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22 |
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1766206004158005248 |