Scattering layer statistics from space borne GLAS observations
International audience Cloud and aerosol layers detected by the space borne Geoscience Laser Altimeter System (GLAS) are used to derive statistics of clear and almost clear atmospheres, the latter defined to be those with some scattering material but total optical thickness less than 0.2. Such stati...
Published in: | Geophysical Research Letters |
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Online Access: | https://hal.archives-ouvertes.fr/hal-03121129 https://hal.archives-ouvertes.fr/hal-03121129/document https://hal.archives-ouvertes.fr/hal-03121129/file/2005GL023825.pdf https://doi.org/10.1029/2005GL023825 |
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ftccsdartic:oai:HAL:hal-03121129v1 2023-05-15T13:48:19+02:00 Scattering layer statistics from space borne GLAS observations Bréon, F.M. O'Brien, D. M. Spinhirne, J. D. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Department of Atmospheric Science Fort Collins Colorado State University Fort Collins (CSU) NASA Goddard Space Flight Center (GSFC) 2005-11 https://hal.archives-ouvertes.fr/hal-03121129 https://hal.archives-ouvertes.fr/hal-03121129/document https://hal.archives-ouvertes.fr/hal-03121129/file/2005GL023825.pdf https://doi.org/10.1029/2005GL023825 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GL023825 hal-03121129 https://hal.archives-ouvertes.fr/hal-03121129 https://hal.archives-ouvertes.fr/hal-03121129/document https://hal.archives-ouvertes.fr/hal-03121129/file/2005GL023825.pdf doi:10.1029/2005GL023825 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-03121129 Geophysical Research Letters, American Geophysical Union, 2005, 32 (22), pp.L22802. ⟨10.1029/2005GL023825⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2005 ftccsdartic https://doi.org/10.1029/2005GL023825 2021-12-19T00:32:37Z International audience Cloud and aerosol layers detected by the space borne Geoscience Laser Altimeter System (GLAS) are used to derive statistics of clear and almost clear atmospheres, the latter defined to be those with some scattering material but total optical thickness less than 0.2. Such statistics are needed to evaluate the potential coverage of NASA's forthcoming Orbital Carbon Observatory. The global fraction of clear cases is approximately 15%, with large scale spatial structures similar to those found by passive sensors. The spatial distribution of almost clear cases is similar to that for clear, with global fraction approximately 20%. The mean altitude of optically thin scattering layers is generally below one kilometer, indicating that they are composed mostly of boundary layer aerosol rather than high altitude cloud. The spatial correlation function of clear cases is accurately reproduced by the analytical function F(d) = exp[−(d/d0)0.5], where d0 is a correlation scale length. Between 60N and 60S, d0 shows little zonal variation, and its average value is 320 km. Over the Arctic d0 falls to 250 km, but rises to 450 km over the Antarctic. Article in Journal/Newspaper Antarc* Antarctic Arctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Arctic The Antarctic Geophysical Research Letters 32 22 n/a n/a |
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 |
[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] Bréon, F.M. O'Brien, D. M. Spinhirne, J. D. Scattering layer statistics from space borne GLAS observations |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience Cloud and aerosol layers detected by the space borne Geoscience Laser Altimeter System (GLAS) are used to derive statistics of clear and almost clear atmospheres, the latter defined to be those with some scattering material but total optical thickness less than 0.2. Such statistics are needed to evaluate the potential coverage of NASA's forthcoming Orbital Carbon Observatory. The global fraction of clear cases is approximately 15%, with large scale spatial structures similar to those found by passive sensors. The spatial distribution of almost clear cases is similar to that for clear, with global fraction approximately 20%. The mean altitude of optically thin scattering layers is generally below one kilometer, indicating that they are composed mostly of boundary layer aerosol rather than high altitude cloud. The spatial correlation function of clear cases is accurately reproduced by the analytical function F(d) = exp[−(d/d0)0.5], where d0 is a correlation scale length. Between 60N and 60S, d0 shows little zonal variation, and its average value is 320 km. Over the Arctic d0 falls to 250 km, but rises to 450 km over the Antarctic. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Department of Atmospheric Science Fort Collins Colorado State University Fort Collins (CSU) NASA Goddard Space Flight Center (GSFC) |
format |
Article in Journal/Newspaper |
author |
Bréon, F.M. O'Brien, D. M. Spinhirne, J. D. |
author_facet |
Bréon, F.M. O'Brien, D. M. Spinhirne, J. D. |
author_sort |
Bréon, F.M. |
title |
Scattering layer statistics from space borne GLAS observations |
title_short |
Scattering layer statistics from space borne GLAS observations |
title_full |
Scattering layer statistics from space borne GLAS observations |
title_fullStr |
Scattering layer statistics from space borne GLAS observations |
title_full_unstemmed |
Scattering layer statistics from space borne GLAS observations |
title_sort |
scattering layer statistics from space borne glas observations |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.archives-ouvertes.fr/hal-03121129 https://hal.archives-ouvertes.fr/hal-03121129/document https://hal.archives-ouvertes.fr/hal-03121129/file/2005GL023825.pdf https://doi.org/10.1029/2005GL023825 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-03121129 Geophysical Research Letters, American Geophysical Union, 2005, 32 (22), pp.L22802. ⟨10.1029/2005GL023825⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GL023825 hal-03121129 https://hal.archives-ouvertes.fr/hal-03121129 https://hal.archives-ouvertes.fr/hal-03121129/document https://hal.archives-ouvertes.fr/hal-03121129/file/2005GL023825.pdf doi:10.1029/2005GL023825 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2005GL023825 |
container_title |
Geophysical Research Letters |
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32 |
container_issue |
22 |
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1766249094061228032 |