Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment
International audience 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....
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ftinsu:oai:HAL:insu-02942456v2 2023-11-05T03:39:23+01:00 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 TROPO - 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) 2021 https://insu.hal.science/insu-02942456 https://insu.hal.science/insu-02942456v2/document https://insu.hal.science/insu-02942456v2/file/acp-21-4079-2021.pdf https://doi.org/10.5194/acp-21-4079-2021 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-21-4079-2021 insu-02942456 https://insu.hal.science/insu-02942456 https://insu.hal.science/insu-02942456v2/document https://insu.hal.science/insu-02942456v2/file/acp-21-4079-2021.pdf doi:10.5194/acp-21-4079-2021 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://insu.hal.science/insu-02942456 Atmospheric Chemistry and Physics, 2021, 21 (5), pp.4079-4101. ⟨10.5194/acp-21-4079-2021⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2021 ftinsu https://doi.org/10.5194/acp-21-4079-2021 2023-10-11T16:33:42Z International audience 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 1805 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. Cloud frequency is globally at 75%, 5 and 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 cover is very low, with the great majority of first layer bases beneath 120 m. In the shoulder seasons, 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 10 effect. Article in Journal/Newspaper Arctic Arctic Ocean North Pole Institut national des sciences de l'Univers: HAL-INSU Atmospheric Chemistry and Physics 21 5 4079 4101 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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] 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 |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience 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 1805 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. Cloud frequency is globally at 75%, 5 and 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 cover is very low, with the great majority of first layer bases beneath 120 m. In the shoulder seasons, 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 10 effect. |
author2 |
TROPO - 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 |
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 |
HAL CCSD |
publishDate |
2021 |
url |
https://insu.hal.science/insu-02942456 https://insu.hal.science/insu-02942456v2/document https://insu.hal.science/insu-02942456v2/file/acp-21-4079-2021.pdf https://doi.org/10.5194/acp-21-4079-2021 |
genre |
Arctic Arctic Ocean North Pole |
genre_facet |
Arctic Arctic Ocean North Pole |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://insu.hal.science/insu-02942456 Atmospheric Chemistry and Physics, 2021, 21 (5), pp.4079-4101. ⟨10.5194/acp-21-4079-2021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-21-4079-2021 insu-02942456 https://insu.hal.science/insu-02942456 https://insu.hal.science/insu-02942456v2/document https://insu.hal.science/insu-02942456v2/file/acp-21-4079-2021.pdf doi:10.5194/acp-21-4079-2021 |
op_rights |
http://creativecommons.org/licenses/by-nc/ 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 |
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4079 |
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