The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo
International audience When sea ice concentration decreases, surface albedo decreases. Yet the impact of Southern Ocean sea ice concentration decreases on top-of-atmosphere albedo is uncertain. Why? The cloud cover and opacity response to Southern Ocean sea ice variability has been challenging to qu...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://hal.science/hal-03658684 https://hal.science/hal-03658684/document https://hal.science/hal-03658684/file/JGR%20Atmospheres%20-%202018%20-%20Frey%20-%20The%20Combined%20Influence%20of%20Observed%20Southern%20Ocean%20Clouds%20and%20Sea%20Ice%20on%20Top%25u2010of%25u2010Atmosphere.pdf https://doi.org/10.1029/2018JD028505 |
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ftecoleponts:oai:HAL:hal-03658684v1 2024-09-15T18:34:05+00:00 The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo Frey, W. R. Morrison, A. L. Kay, J. E. Guzman, R. Chepfer, H. Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-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) Université Paris Cité (UPCité) 2018 https://hal.science/hal-03658684 https://hal.science/hal-03658684/document https://hal.science/hal-03658684/file/JGR%20Atmospheres%20-%202018%20-%20Frey%20-%20The%20Combined%20Influence%20of%20Observed%20Southern%20Ocean%20Clouds%20and%20Sea%20Ice%20on%20Top%25u2010of%25u2010Atmosphere.pdf https://doi.org/10.1029/2018JD028505 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JD028505 hal-03658684 https://hal.science/hal-03658684 https://hal.science/hal-03658684/document https://hal.science/hal-03658684/file/JGR%20Atmospheres%20-%202018%20-%20Frey%20-%20The%20Combined%20Influence%20of%20Observed%20Southern%20Ocean%20Clouds%20and%20Sea%20Ice%20on%20Top%25u2010of%25u2010Atmosphere.pdf BIBCODE: 2018JGRD.123.4461F doi:10.1029/2018JD028505 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-03658684 Journal of Geophysical Research: Atmospheres, 2018, 123, pp.4461-4475. ⟨10.1029/2018JD028505⟩ Southern Ocean sea ice cloud cloud feedbacks top-of-atmosphere albedo [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2018 ftecoleponts https://doi.org/10.1029/2018JD028505 2024-08-13T23:47:27Z International audience When sea ice concentration decreases, surface albedo decreases. Yet the impact of Southern Ocean sea ice concentration decreases on top-of-atmosphere albedo is uncertain. Why? The cloud cover and opacity response to Southern Ocean sea ice variability has been challenging to quantify. Here we use observations to constrain the cloud response to Southern Ocean sea ice variability and assess the combined influence of sea ice and clouds on top-of-atmosphere albedo. We focus on the spring and summer seasons that dominate the high-latitude shortwave energy budget. To isolate the influence of sea ice concentration on clouds, we analyze spaceborne light detection and ranging (LIDAR) observations in regions where present-day sea ice concentration varies. During spring, low cloud cover is slightly (4%) higher over open water compared to sea ice. During summer, sea ice variability does not affect low cloud cover. During both spring and summer, cloud opacity is larger over open water than over sea ice due to a cloud phase shift from ice toward liquid with warming. Independent ship-based visual and radiosonde observations available during summer corroborate the LIDAR results. Even with the cloud response, satellite-observed top-of-atmosphere albedo is lower over open water than over sea ice. The observations show the cloud response to sea ice retreat with warming will not mask the surface albedo decrease. In other words, more shortwave radiation will be absorbed when Southern Ocean sea ice is lost. Article in Journal/Newspaper Sea ice Southern Ocean École des Ponts ParisTech: HAL Journal of Geophysical Research: Atmospheres 123 9 4461 4475 |
institution |
Open Polar |
collection |
École des Ponts ParisTech: HAL |
op_collection_id |
ftecoleponts |
language |
English |
topic |
Southern Ocean sea ice cloud cloud feedbacks top-of-atmosphere albedo [SDU]Sciences of the Universe [physics] |
spellingShingle |
Southern Ocean sea ice cloud cloud feedbacks top-of-atmosphere albedo [SDU]Sciences of the Universe [physics] Frey, W. R. Morrison, A. L. Kay, J. E. Guzman, R. Chepfer, H. The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo |
topic_facet |
Southern Ocean sea ice cloud cloud feedbacks top-of-atmosphere albedo [SDU]Sciences of the Universe [physics] |
description |
International audience When sea ice concentration decreases, surface albedo decreases. Yet the impact of Southern Ocean sea ice concentration decreases on top-of-atmosphere albedo is uncertain. Why? The cloud cover and opacity response to Southern Ocean sea ice variability has been challenging to quantify. Here we use observations to constrain the cloud response to Southern Ocean sea ice variability and assess the combined influence of sea ice and clouds on top-of-atmosphere albedo. We focus on the spring and summer seasons that dominate the high-latitude shortwave energy budget. To isolate the influence of sea ice concentration on clouds, we analyze spaceborne light detection and ranging (LIDAR) observations in regions where present-day sea ice concentration varies. During spring, low cloud cover is slightly (4%) higher over open water compared to sea ice. During summer, sea ice variability does not affect low cloud cover. During both spring and summer, cloud opacity is larger over open water than over sea ice due to a cloud phase shift from ice toward liquid with warming. Independent ship-based visual and radiosonde observations available during summer corroborate the LIDAR results. Even with the cloud response, satellite-observed top-of-atmosphere albedo is lower over open water than over sea ice. The observations show the cloud response to sea ice retreat with warming will not mask the surface albedo decrease. In other words, more shortwave radiation will be absorbed when Southern Ocean sea ice is lost. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-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) Université Paris Cité (UPCité) |
format |
Article in Journal/Newspaper |
author |
Frey, W. R. Morrison, A. L. Kay, J. E. Guzman, R. Chepfer, H. |
author_facet |
Frey, W. R. Morrison, A. L. Kay, J. E. Guzman, R. Chepfer, H. |
author_sort |
Frey, W. R. |
title |
The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo |
title_short |
The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo |
title_full |
The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo |
title_fullStr |
The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo |
title_full_unstemmed |
The Combined Influence of Observed Southern Ocean Clouds and Sea Ice on Top-of-Atmosphere Albedo |
title_sort |
combined influence of observed southern ocean clouds and sea ice on top-of-atmosphere albedo |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-03658684 https://hal.science/hal-03658684/document https://hal.science/hal-03658684/file/JGR%20Atmospheres%20-%202018%20-%20Frey%20-%20The%20Combined%20Influence%20of%20Observed%20Southern%20Ocean%20Clouds%20and%20Sea%20Ice%20on%20Top%25u2010of%25u2010Atmosphere.pdf https://doi.org/10.1029/2018JD028505 |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-03658684 Journal of Geophysical Research: Atmospheres, 2018, 123, pp.4461-4475. ⟨10.1029/2018JD028505⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JD028505 hal-03658684 https://hal.science/hal-03658684 https://hal.science/hal-03658684/document https://hal.science/hal-03658684/file/JGR%20Atmospheres%20-%202018%20-%20Frey%20-%20The%20Combined%20Influence%20of%20Observed%20Southern%20Ocean%20Clouds%20and%20Sea%20Ice%20on%20Top%25u2010of%25u2010Atmosphere.pdf BIBCODE: 2018JGRD.123.4461F doi:10.1029/2018JD028505 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2018JD028505 |
container_title |
Journal of Geophysical Research: Atmospheres |
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123 |
container_issue |
9 |
container_start_page |
4461 |
op_container_end_page |
4475 |
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