Characterization of Arctic mixed phase clouds at regional and small scales
International audience Previous observations suggest that Mixed Phase Clouds (MPC) occur frequently in the Arctic and often persist for many days due to a combination of local processes (microphysical and radiative for instance) and larger scale meteorological conditions. These low-level liquid cont...
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ftclermontuniv:oai:HAL:insu-01448602v1 2023-05-15T14:41:24+02:00 Characterization of Arctic mixed phase clouds at regional and small scales Jourdan, Olivier Mioche, Guillaume Delanoë, Julien Gourbeyre, Christophe Dupuy, Régis Schwarzenboeck, Alfons Laboratoire de météorologie physique (LaMP) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) manchester, United Kingdom 2016-07-25 https://hal-insu.archives-ouvertes.fr/insu-01448602 en eng HAL CCSD insu-01448602 https://hal-insu.archives-ouvertes.fr/insu-01448602 17th International Conference on Clouds and Precipitation 2016 https://hal-insu.archives-ouvertes.fr/insu-01448602 17th International Conference on Clouds and Precipitation 2016, Jul 2016, manchester, United Kingdom [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/conferenceObject Conference papers 2016 ftclermontuniv 2023-03-14T23:59:50Z International audience Previous observations suggest that Mixed Phase Clouds (MPC) occur frequently in the Arctic and often persist for many days due to a combination of local processes (microphysical and radiative for instance) and larger scale meteorological conditions. These low-level liquid containing clouds exert a large influence on the surface radiative fluxes and feedbacks on Arctic climate. However, understanding the spatial phase distribution within MPC remains a challenge.In this study, the MPC macrophysical and microphysical properties are investigated at a regional scale using CloudSat and CALIPSO observations (2007-2010) and at smaller scale with airborne in situ measurements performed in the Svalbard region.Results show that MPCs have a mean frequency of occurrence ranging from 30% (end of winter) to 55% (in autumn) in the Arctic. In the Svalbard region, the frequencies of occurrence are significantly higher with values ranging from 45% to 60%. MPCs are especially located at low altitudes, below 3000m, where their occurrence reaches 90%, particularly in winter, spring and autumn. Moreover, results highlight that MPCs are statistically more frequent over open sea than sea ice or land. These observations also allow us to assess how already performed small scale airborne measurements are representative of the variety of clouds encountered in the Arctic. In situ measurements (44 vertical profiles obtained during ASTAR, POLARCAT, SORPIC) are statistically analyzed to derive representative profiles of MPC microphysical and optical properties (optical depth, liquid/water fraction, ice crystals habit). These analyses should contribute to a better understanding of processes occurring in arctic MPC. Conference Object Arctic Sea ice Svalbard HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) Arctic Svalbard |
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Open Polar |
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HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) |
op_collection_id |
ftclermontuniv |
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] Jourdan, Olivier Mioche, Guillaume Delanoë, Julien Gourbeyre, Christophe Dupuy, Régis Schwarzenboeck, Alfons Characterization of Arctic mixed phase clouds at regional and small scales |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience Previous observations suggest that Mixed Phase Clouds (MPC) occur frequently in the Arctic and often persist for many days due to a combination of local processes (microphysical and radiative for instance) and larger scale meteorological conditions. These low-level liquid containing clouds exert a large influence on the surface radiative fluxes and feedbacks on Arctic climate. However, understanding the spatial phase distribution within MPC remains a challenge.In this study, the MPC macrophysical and microphysical properties are investigated at a regional scale using CloudSat and CALIPSO observations (2007-2010) and at smaller scale with airborne in situ measurements performed in the Svalbard region.Results show that MPCs have a mean frequency of occurrence ranging from 30% (end of winter) to 55% (in autumn) in the Arctic. In the Svalbard region, the frequencies of occurrence are significantly higher with values ranging from 45% to 60%. MPCs are especially located at low altitudes, below 3000m, where their occurrence reaches 90%, particularly in winter, spring and autumn. Moreover, results highlight that MPCs are statistically more frequent over open sea than sea ice or land. These observations also allow us to assess how already performed small scale airborne measurements are representative of the variety of clouds encountered in the Arctic. In situ measurements (44 vertical profiles obtained during ASTAR, POLARCAT, SORPIC) are statistically analyzed to derive representative profiles of MPC microphysical and optical properties (optical depth, liquid/water fraction, ice crystals habit). These analyses should contribute to a better understanding of processes occurring in arctic MPC. |
author2 |
Laboratoire de météorologie physique (LaMP) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Jourdan, Olivier Mioche, Guillaume Delanoë, Julien Gourbeyre, Christophe Dupuy, Régis Schwarzenboeck, Alfons |
author_facet |
Jourdan, Olivier Mioche, Guillaume Delanoë, Julien Gourbeyre, Christophe Dupuy, Régis Schwarzenboeck, Alfons |
author_sort |
Jourdan, Olivier |
title |
Characterization of Arctic mixed phase clouds at regional and small scales |
title_short |
Characterization of Arctic mixed phase clouds at regional and small scales |
title_full |
Characterization of Arctic mixed phase clouds at regional and small scales |
title_fullStr |
Characterization of Arctic mixed phase clouds at regional and small scales |
title_full_unstemmed |
Characterization of Arctic mixed phase clouds at regional and small scales |
title_sort |
characterization of arctic mixed phase clouds at regional and small scales |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal-insu.archives-ouvertes.fr/insu-01448602 |
op_coverage |
manchester, United Kingdom |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Sea ice Svalbard |
genre_facet |
Arctic Sea ice Svalbard |
op_source |
17th International Conference on Clouds and Precipitation 2016 https://hal-insu.archives-ouvertes.fr/insu-01448602 17th International Conference on Clouds and Precipitation 2016, Jul 2016, manchester, United Kingdom |
op_relation |
insu-01448602 https://hal-insu.archives-ouvertes.fr/insu-01448602 |
_version_ |
1766313186495037440 |