Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment
The Ice, Atmosphere, Arctic Ocean Observing System (IAOOS) field experiment took place from 2014 to 2019. Over this period, more than 20 instrumented buoys were deployed at the North Pole. Once locked into the ice, the buoys drifted for periods of a month to more than a year. Some of these buoys wer...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00055960 2024-09-15T17:53:57+00:00 Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment Maillard, Julia Ravetta, François Raut, Jean-Christophe Mariage, Vincent Pelon, Jacques 2021-03 electronic https://doi.org/10.5194/acp-21-4079-2021 https://noa.gwlb.de/receive/cop_mods_00055960 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055611/acp-21-4079-2021.pdf https://acp.copernicus.org/articles/21/4079/2021/acp-21-4079-2021.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-21-4079-2021 https://noa.gwlb.de/receive/cop_mods_00055960 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055611/acp-21-4079-2021.pdf https://acp.copernicus.org/articles/21/4079/2021/acp-21-4079-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/acp-21-4079-2021 2024-06-26T04:41:37Z The Ice, Atmosphere, Arctic Ocean Observing System (IAOOS) field experiment took place from 2014 to 2019. Over this period, more than 20 instrumented buoys were deployed at the North Pole. Once locked into the ice, the buoys drifted for periods of a month to more than a year. Some of these buoys were equipped with 808 nm wavelength lidars which acquired a total of 1777 profiles over the course of the campaign. This IAOOS lidar dataset is exploited to establish a novel statistic of cloud cover and of the geometrical and optical characteristics of the lowest cloud layer. The average cloud frequency from April to December over the course of the campaign was 75 %. Cloud occurrence frequencies were above 85 % from May to October. Single layers are thickest in October/November and thinnest in the summer. Meanwhile, their optical depth is maximum in October. On the whole, the cloud base height is very low, with the great majority of first layer bases beneath 120 m. In April and October, surface temperatures are markedly warmer when the IAOOS profile contains at least one low cloud than when it does not. This temperature difference is statistically insignificant in the summer months. Indeed, summer clouds have a shortwave cooling effect which can reach −60 W m−2 and balance out their longwave warming effect. Article in Journal/Newspaper Arctic Ocean North Pole Niedersächsisches Online-Archiv NOA Atmospheric Chemistry and Physics 21 5 4079 4101 |
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article Verlagsveröffentlichung Maillard, Julia Ravetta, François Raut, Jean-Christophe Mariage, Vincent Pelon, Jacques Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment |
topic_facet |
article Verlagsveröffentlichung |
description |
The Ice, Atmosphere, Arctic Ocean Observing System (IAOOS) field experiment took place from 2014 to 2019. Over this period, more than 20 instrumented buoys were deployed at the North Pole. Once locked into the ice, the buoys drifted for periods of a month to more than a year. Some of these buoys were equipped with 808 nm wavelength lidars which acquired a total of 1777 profiles over the course of the campaign. This IAOOS lidar dataset is exploited to establish a novel statistic of cloud cover and of the geometrical and optical characteristics of the lowest cloud layer. The average cloud frequency from April to December over the course of the campaign was 75 %. Cloud occurrence frequencies were above 85 % from May to October. Single layers are thickest in October/November and thinnest in the summer. Meanwhile, their optical depth is maximum in October. On the whole, the cloud base height is very low, with the great majority of first layer bases beneath 120 m. In April and October, surface temperatures are markedly warmer when the IAOOS profile contains at least one low cloud than when it does not. This temperature difference is statistically insignificant in the summer months. Indeed, summer clouds have a shortwave cooling effect which can reach −60 W m−2 and balance out their longwave warming effect. |
format |
Article in Journal/Newspaper |
author |
Maillard, Julia Ravetta, François Raut, Jean-Christophe Mariage, Vincent Pelon, Jacques |
author_facet |
Maillard, Julia Ravetta, François Raut, Jean-Christophe Mariage, Vincent Pelon, Jacques |
author_sort |
Maillard, Julia |
title |
Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment |
title_short |
Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment |
title_full |
Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment |
title_fullStr |
Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment |
title_full_unstemmed |
Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment |
title_sort |
characterisation and surface radiative impact of arctic low clouds from the iaoos field experiment |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/acp-21-4079-2021 https://noa.gwlb.de/receive/cop_mods_00055960 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055611/acp-21-4079-2021.pdf https://acp.copernicus.org/articles/21/4079/2021/acp-21-4079-2021.pdf |
genre |
Arctic Ocean North Pole |
genre_facet |
Arctic Ocean North Pole |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-21-4079-2021 https://noa.gwlb.de/receive/cop_mods_00055960 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055611/acp-21-4079-2021.pdf https://acp.copernicus.org/articles/21/4079/2021/acp-21-4079-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-21-4079-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
5 |
container_start_page |
4079 |
op_container_end_page |
4101 |
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1810430100377698304 |