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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ftccsdartic:oai:HAL:insu-02942456v1 2023-05-15T14:58:37+02:00 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) Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) 2020 https://hal-insu.archives-ouvertes.fr/insu-02942456 https://hal-insu.archives-ouvertes.fr/insu-02942456/document https://hal-insu.archives-ouvertes.fr/insu-02942456/file/acp-2020-918.pdf https://doi.org/10.5194/acp-2020-918 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-2020-918 insu-02942456 https://hal-insu.archives-ouvertes.fr/insu-02942456 https://hal-insu.archives-ouvertes.fr/insu-02942456/document https://hal-insu.archives-ouvertes.fr/insu-02942456/file/acp-2020-918.pdf doi:10.5194/acp-2020-918 info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal-insu.archives-ouvertes.fr/insu-02942456 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2020, pp.(Under Review). ⟨10.5194/acp-2020-918⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.5194/acp-2020-918 2020-12-23T23:10:50Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Arctic Ocean North Pole |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
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) Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - 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 |
2020 |
url |
https://hal-insu.archives-ouvertes.fr/insu-02942456 https://hal-insu.archives-ouvertes.fr/insu-02942456/document https://hal-insu.archives-ouvertes.fr/insu-02942456/file/acp-2020-918.pdf https://doi.org/10.5194/acp-2020-918 |
geographic |
Arctic Arctic Ocean North Pole |
geographic_facet |
Arctic Arctic Ocean North Pole |
genre |
Arctic Arctic Ocean North Pole |
genre_facet |
Arctic Arctic Ocean North Pole |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal-insu.archives-ouvertes.fr/insu-02942456 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2020, pp.(Under Review). ⟨10.5194/acp-2020-918⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-2020-918 insu-02942456 https://hal-insu.archives-ouvertes.fr/insu-02942456 https://hal-insu.archives-ouvertes.fr/insu-02942456/document https://hal-insu.archives-ouvertes.fr/insu-02942456/file/acp-2020-918.pdf doi:10.5194/acp-2020-918 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-2020-918 |
_version_ |
1766330750377918464 |