Natural marine cloud brightening in the Southern Ocean
The number of cloud droplets per unit volume (N d ) is a fundamentally important property of marine boundary layer (MBL) liquid clouds that, at constant liquid water path, exerts considerable controls on albedo. Past work has shown that regional N d has a direct correlation to marine primary product...
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Online Access: | http://www.osti.gov/servlets/purl/1958432 https://www.osti.gov/biblio/1958432 https://doi.org/10.5194/acp-23-1677-2023 |
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ftosti:oai:osti.gov:1958432 2023-07-30T03:57:43+02:00 Natural marine cloud brightening in the Southern Ocean Mace, Gerald G. Benson, Sally Humphries, Ruhi Gombert, Peter M. Sterner, Elizabeth 2023-03-06 application/pdf http://www.osti.gov/servlets/purl/1958432 https://www.osti.gov/biblio/1958432 https://doi.org/10.5194/acp-23-1677-2023 unknown http://www.osti.gov/servlets/purl/1958432 https://www.osti.gov/biblio/1958432 https://doi.org/10.5194/acp-23-1677-2023 doi:10.5194/acp-23-1677-2023 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.5194/acp-23-1677-2023 2023-07-11T10:24:54Z The number of cloud droplets per unit volume (N d ) is a fundamentally important property of marine boundary layer (MBL) liquid clouds that, at constant liquid water path, exerts considerable controls on albedo. Past work has shown that regional N d has a direct correlation to marine primary productivity (PP) because of the role of seasonally varying, biogenically derived precursor gases in modulating secondary aerosol properties. These linkages are thought to be observable over the high-latitude oceans, where strong seasonal variability in aerosol and meteorology covary in mostly pristine environments. Here, we examine N d variability derived from 5 years of MODIS Level 2-derived cloud properties in a broad region of the summer eastern Southern Ocean and adjacent marginal seas. We demonstrate latitudinal, longitudinal and temporal gradients in N d that are strongly correlated with the passage of air masses over high-PP waters that are mostly concentrated along the Antarctic Shelf poleward of 60°S. We find that the albedo of MBL clouds in the latitudes south of 60°S is significantly higher than similar liquid water path (LWP) clouds north of this latitude. Other/Unknown Material Antarc* Antarctic Southern Ocean SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic Southern Ocean The Antarctic Atmospheric Chemistry and Physics 23 2 1677 1685 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Mace, Gerald G. Benson, Sally Humphries, Ruhi Gombert, Peter M. Sterner, Elizabeth Natural marine cloud brightening in the Southern Ocean |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
The number of cloud droplets per unit volume (N d ) is a fundamentally important property of marine boundary layer (MBL) liquid clouds that, at constant liquid water path, exerts considerable controls on albedo. Past work has shown that regional N d has a direct correlation to marine primary productivity (PP) because of the role of seasonally varying, biogenically derived precursor gases in modulating secondary aerosol properties. These linkages are thought to be observable over the high-latitude oceans, where strong seasonal variability in aerosol and meteorology covary in mostly pristine environments. Here, we examine N d variability derived from 5 years of MODIS Level 2-derived cloud properties in a broad region of the summer eastern Southern Ocean and adjacent marginal seas. We demonstrate latitudinal, longitudinal and temporal gradients in N d that are strongly correlated with the passage of air masses over high-PP waters that are mostly concentrated along the Antarctic Shelf poleward of 60°S. We find that the albedo of MBL clouds in the latitudes south of 60°S is significantly higher than similar liquid water path (LWP) clouds north of this latitude. |
author |
Mace, Gerald G. Benson, Sally Humphries, Ruhi Gombert, Peter M. Sterner, Elizabeth |
author_facet |
Mace, Gerald G. Benson, Sally Humphries, Ruhi Gombert, Peter M. Sterner, Elizabeth |
author_sort |
Mace, Gerald G. |
title |
Natural marine cloud brightening in the Southern Ocean |
title_short |
Natural marine cloud brightening in the Southern Ocean |
title_full |
Natural marine cloud brightening in the Southern Ocean |
title_fullStr |
Natural marine cloud brightening in the Southern Ocean |
title_full_unstemmed |
Natural marine cloud brightening in the Southern Ocean |
title_sort |
natural marine cloud brightening in the southern ocean |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1958432 https://www.osti.gov/biblio/1958432 https://doi.org/10.5194/acp-23-1677-2023 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
http://www.osti.gov/servlets/purl/1958432 https://www.osti.gov/biblio/1958432 https://doi.org/10.5194/acp-23-1677-2023 doi:10.5194/acp-23-1677-2023 |
op_doi |
https://doi.org/10.5194/acp-23-1677-2023 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
23 |
container_issue |
2 |
container_start_page |
1677 |
op_container_end_page |
1685 |
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1772818936957501440 |