Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations-a case study
International audience During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign, which was conducted in March and April 2007, an optically thin ice cloud was observed south of Svalbard at around 3 km altitude. The microphysical and radiative properties of this particula...
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Online Access: | https://hal.uca.fr/hal-01895911 https://hal.uca.fr/hal-01895911/document https://hal.uca.fr/hal-01895911/file/acp-9-2647-2009.pdf https://doi.org/10.5194/acp-9-2647-2009 |
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ftccsdartic:oai:HAL:hal-01895911v1 2023-05-15T13:11:50+02:00 Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations-a case study Lampert, A Ehrlich, A Dörnbrack, A. Jourdan, O. Gayet, J.-F Mioche, G. Shcherbakov, V. Ritter, C. Wendisch, M. Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Johannes Gutenberg - Universität Mainz (JGU) DLR Institut für Physik der Atmosphäre (IPA) Deutsches Zentrum für Luft- und Raumfahrt Oberpfaffenhofen-Wessling (DLR) Laboratoire de Météorologie Physique (LaMP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) 2009 https://hal.uca.fr/hal-01895911 https://hal.uca.fr/hal-01895911/document https://hal.uca.fr/hal-01895911/file/acp-9-2647-2009.pdf https://doi.org/10.5194/acp-9-2647-2009 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-9-2647-2009 hal-01895911 https://hal.uca.fr/hal-01895911 https://hal.uca.fr/hal-01895911/document https://hal.uca.fr/hal-01895911/file/acp-9-2647-2009.pdf doi:10.5194/acp-9-2647-2009 info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.uca.fr/hal-01895911 Atmospheric Chemistry and Physics, European Geosciences Union, 2009, 9 (8), pp.2647-2661. ⟨10.5194/acp-9-2647-2009⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2009 ftccsdartic https://doi.org/10.5194/acp-9-2647-2009 2021-10-24T05:57:13Z International audience During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign, which was conducted in March and April 2007, an optically thin ice cloud was observed south of Svalbard at around 3 km altitude. The microphysical and radiative properties of this particular sub-visible midlevel cloud were investigated with complementary remote sensing and in situ instruments. Collocated airborne lidar remote sensing and spectral solar radiation measurements were performed at a flight altitude of 2300 m below the cloud base. Under almost stationary atmospheric conditions, the same subvisible midlevel cloud was probed with various in situ sensors roughly 30 min later. From individual ice crystal samples detected with the Cloud Particle Imager and the ensemble of particles measured with the Polar Nephelometer, microphysical properties were retrieved with a bi-modal inversion algorithm. The best agreement with the measurements was obtained for small ice spheres and deeply rough hexagonal ice crystals. Furthermore , the single-scattering albedo, the scattering phase function as well as the volume extinction coefficient and the effective diameter of the crystal population were determined. A lidar ratio of 21(±6) sr was deduced by three independent methods. These parameters in conjunction with the cloud optical thickness obtained from the lidar measurements were used to compute spectral and broadband radiances and ir-radiances with a radiative transfer code. The simulated results agreed with the observed spectral downwelling radiance Correspondence to: A. Lampert (astrid.lampert@awi.de) within the range given by the measurement uncertainty. Furthermore , the broadband radiative simulations estimated a net (solar plus thermal infrared) radiative forcing of the sub-visible midlevel ice cloud of −0.4 W m −2 (−3.2 W m −2 in the solar and +2.8 W m −2 in the thermal infrared wavelength range). Article in Journal/Newspaper albedo Arctic Svalbard Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Lampert ENVELOPE(-62.619,-62.619,-74.545,-74.545) Svalbard Atmospheric Chemistry and Physics 9 8 2647 2661 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Lampert, A Ehrlich, A Dörnbrack, A. Jourdan, O. Gayet, J.-F Mioche, G. Shcherbakov, V. Ritter, C. Wendisch, M. Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations-a case study |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign, which was conducted in March and April 2007, an optically thin ice cloud was observed south of Svalbard at around 3 km altitude. The microphysical and radiative properties of this particular sub-visible midlevel cloud were investigated with complementary remote sensing and in situ instruments. Collocated airborne lidar remote sensing and spectral solar radiation measurements were performed at a flight altitude of 2300 m below the cloud base. Under almost stationary atmospheric conditions, the same subvisible midlevel cloud was probed with various in situ sensors roughly 30 min later. From individual ice crystal samples detected with the Cloud Particle Imager and the ensemble of particles measured with the Polar Nephelometer, microphysical properties were retrieved with a bi-modal inversion algorithm. The best agreement with the measurements was obtained for small ice spheres and deeply rough hexagonal ice crystals. Furthermore , the single-scattering albedo, the scattering phase function as well as the volume extinction coefficient and the effective diameter of the crystal population were determined. A lidar ratio of 21(±6) sr was deduced by three independent methods. These parameters in conjunction with the cloud optical thickness obtained from the lidar measurements were used to compute spectral and broadband radiances and ir-radiances with a radiative transfer code. The simulated results agreed with the observed spectral downwelling radiance Correspondence to: A. Lampert (astrid.lampert@awi.de) within the range given by the measurement uncertainty. Furthermore , the broadband radiative simulations estimated a net (solar plus thermal infrared) radiative forcing of the sub-visible midlevel ice cloud of −0.4 W m −2 (−3.2 W m −2 in the solar and +2.8 W m −2 in the thermal infrared wavelength range). |
author2 |
Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Johannes Gutenberg - Universität Mainz (JGU) DLR Institut für Physik der Atmosphäre (IPA) Deutsches Zentrum für Luft- und Raumfahrt Oberpfaffenhofen-Wessling (DLR) Laboratoire de Météorologie Physique (LaMP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Lampert, A Ehrlich, A Dörnbrack, A. Jourdan, O. Gayet, J.-F Mioche, G. Shcherbakov, V. Ritter, C. Wendisch, M. |
author_facet |
Lampert, A Ehrlich, A Dörnbrack, A. Jourdan, O. Gayet, J.-F Mioche, G. Shcherbakov, V. Ritter, C. Wendisch, M. |
author_sort |
Lampert, A |
title |
Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations-a case study |
title_short |
Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations-a case study |
title_full |
Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations-a case study |
title_fullStr |
Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations-a case study |
title_full_unstemmed |
Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations-a case study |
title_sort |
microphysical and radiative characterization of a subvisible midlevel arctic ice cloud by airborne observations-a case study |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.uca.fr/hal-01895911 https://hal.uca.fr/hal-01895911/document https://hal.uca.fr/hal-01895911/file/acp-9-2647-2009.pdf https://doi.org/10.5194/acp-9-2647-2009 |
long_lat |
ENVELOPE(-62.619,-62.619,-74.545,-74.545) |
geographic |
Arctic Lampert Svalbard |
geographic_facet |
Arctic Lampert Svalbard |
genre |
albedo Arctic Svalbard |
genre_facet |
albedo Arctic Svalbard |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.uca.fr/hal-01895911 Atmospheric Chemistry and Physics, European Geosciences Union, 2009, 9 (8), pp.2647-2661. ⟨10.5194/acp-9-2647-2009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-9-2647-2009 hal-01895911 https://hal.uca.fr/hal-01895911 https://hal.uca.fr/hal-01895911/document https://hal.uca.fr/hal-01895911/file/acp-9-2647-2009.pdf doi:10.5194/acp-9-2647-2009 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-9-2647-2009 |
container_title |
Atmospheric Chemistry and Physics |
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9 |
container_issue |
8 |
container_start_page |
2647 |
op_container_end_page |
2661 |
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