Consistency of aerosols above clouds characterization from A-Train active and passive measurements
International audience This study presents a comparison between the retrieval of optical properties of aerosol above clouds (AAC) from different techniques developed for the A-Train sensors CALIOP/CALIPSO and POLDER/PARASOL. The main objective is to analyse the consistency between the results derive...
Published in: | Atmospheric Measurement Techniques |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2017
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Subjects: | |
Online Access: | https://insu.hal.science/insu-01592349 https://insu.hal.science/insu-01592349/document https://insu.hal.science/insu-01592349/file/amt-10-3499-2017.pdf https://doi.org/10.5194/amt-10-3499-2017 |
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openpolar |
institution |
Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
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] Deaconu, Lucia, Waquet, Fabien Josset, Damien Ferlay, Nicolas Peers, Fanny Thieuleux, François, Ducos, Fabrice Pascal, Nicolas Tanré, Didier, Pelon, Jacques Goloub, Philippe Consistency of aerosols above clouds characterization from A-Train active and passive measurements |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience This study presents a comparison between the retrieval of optical properties of aerosol above clouds (AAC) from different techniques developed for the A-Train sensors CALIOP/CALIPSO and POLDER/PARASOL. The main objective is to analyse the consistency between the results derived from the active and the passive measurements. We compare the aerosol optical thickness (AOT) above optically thick clouds (cloud optical thickness (COT) larger than 3) and their Ångström exponent (AE). These parameters are retrieved with the CALIOP operational method, the POLDER operational polarization method and the CALIOP-based de-polarization ratio method (DRM) – for which we also propose a calibrated version (denominated DRM SODA , where SODA is the Synergized Optical Depth of Aerosols). We analyse 6 months of data over three distinctive regions characterized by different types of aerosols and clouds. Additionally , for these regions, we select three case studies: a biomass-burning event over the South Atlantic Ocean, a Sa-haran dust case over the North Atlantic Ocean and a Siberian biomass-burning event over the North Pacific Ocean. Four and a half years of data are studied over the entire globe for distinct situations where aerosol and cloud layers are in contact or vertically separated. Overall, the regional analysis shows a good correlation between the POLDER and the DRM SODA AOTs when the microphysics of aerosols is dominated by fine-mode particles of biomass-burning aerosols from southern Africa (correlation coefficient (R 2) of 0.83) or coarse-mode aerosols of Saharan dust (R 2 of 0.82). A good correlation between these methods (R 2 of 0.68) is also observed in the global treatment, when the aerosol and cloud layers are separated well. The analysis of detached layers also shows a mean difference in AOT of 0.07 at 532 nm between POLDER and DRM SODA at a global scale. The correlation between the retrievals decreases when a complex mixture of aerosols is expected (R 2 of 0.37) – as in the East Asia region ... |
author2 |
Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) Naval Research Laboratory (NRL) College of Engineering, Mathematics and Physical Sciences Exeter (EMPS) University of Exeter interaction Clouds Aerosols Radiations - ICARE/AERIS Data and Services Center - UMS 2877 (ICARE) Centre National d'Études Spatiales Toulouse (CNES)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) TROPO - 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) Agence National de la Recherche (ANR) ANR-11-LABX-0005,Cappa,Physiques et Chimie de l'Environnement Atmosphérique(2011) |
format |
Article in Journal/Newspaper |
author |
Deaconu, Lucia, Waquet, Fabien Josset, Damien Ferlay, Nicolas Peers, Fanny Thieuleux, François, Ducos, Fabrice Pascal, Nicolas Tanré, Didier, Pelon, Jacques Goloub, Philippe |
author_facet |
Deaconu, Lucia, Waquet, Fabien Josset, Damien Ferlay, Nicolas Peers, Fanny Thieuleux, François, Ducos, Fabrice Pascal, Nicolas Tanré, Didier, Pelon, Jacques Goloub, Philippe |
author_sort |
Deaconu, Lucia, |
title |
Consistency of aerosols above clouds characterization from A-Train active and passive measurements |
title_short |
Consistency of aerosols above clouds characterization from A-Train active and passive measurements |
title_full |
Consistency of aerosols above clouds characterization from A-Train active and passive measurements |
title_fullStr |
Consistency of aerosols above clouds characterization from A-Train active and passive measurements |
title_full_unstemmed |
Consistency of aerosols above clouds characterization from A-Train active and passive measurements |
title_sort |
consistency of aerosols above clouds characterization from a-train active and passive measurements |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://insu.hal.science/insu-01592349 https://insu.hal.science/insu-01592349/document https://insu.hal.science/insu-01592349/file/amt-10-3499-2017.pdf https://doi.org/10.5194/amt-10-3499-2017 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic South Atlantic Ocean |
genre_facet |
North Atlantic South Atlantic Ocean |
op_source |
ISSN: 1867-1381 EISSN: 1867-8548 Atmospheric Measurement Techniques https://insu.hal.science/insu-01592349 Atmospheric Measurement Techniques, 2017, 10 (9), pp.3499 - 3523. ⟨10.5194/amt-10-3499-2017⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-10-3499-2017 insu-01592349 https://insu.hal.science/insu-01592349 https://insu.hal.science/insu-01592349/document https://insu.hal.science/insu-01592349/file/amt-10-3499-2017.pdf doi:10.5194/amt-10-3499-2017 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/amt-10-3499-2017 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
10 |
container_issue |
9 |
container_start_page |
3499 |
op_container_end_page |
3523 |
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1772817727246827520 |
spelling |
ftuniversailles:oai:HAL:insu-01592349v1 2023-07-30T04:05:39+02:00 Consistency of aerosols above clouds characterization from A-Train active and passive measurements Deaconu, Lucia, Waquet, Fabien Josset, Damien Ferlay, Nicolas Peers, Fanny Thieuleux, François, Ducos, Fabrice Pascal, Nicolas Tanré, Didier, Pelon, Jacques Goloub, Philippe Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) Naval Research Laboratory (NRL) College of Engineering, Mathematics and Physical Sciences Exeter (EMPS) University of Exeter interaction Clouds Aerosols Radiations - ICARE/AERIS Data and Services Center - UMS 2877 (ICARE) Centre National d'Études Spatiales Toulouse (CNES)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) TROPO - 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) Agence National de la Recherche (ANR) ANR-11-LABX-0005,Cappa,Physiques et Chimie de l'Environnement Atmosphérique(2011) 2017 https://insu.hal.science/insu-01592349 https://insu.hal.science/insu-01592349/document https://insu.hal.science/insu-01592349/file/amt-10-3499-2017.pdf https://doi.org/10.5194/amt-10-3499-2017 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-10-3499-2017 insu-01592349 https://insu.hal.science/insu-01592349 https://insu.hal.science/insu-01592349/document https://insu.hal.science/insu-01592349/file/amt-10-3499-2017.pdf doi:10.5194/amt-10-3499-2017 info:eu-repo/semantics/OpenAccess ISSN: 1867-1381 EISSN: 1867-8548 Atmospheric Measurement Techniques https://insu.hal.science/insu-01592349 Atmospheric Measurement Techniques, 2017, 10 (9), pp.3499 - 3523. ⟨10.5194/amt-10-3499-2017⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2017 ftuniversailles https://doi.org/10.5194/amt-10-3499-2017 2023-07-16T21:16:40Z International audience This study presents a comparison between the retrieval of optical properties of aerosol above clouds (AAC) from different techniques developed for the A-Train sensors CALIOP/CALIPSO and POLDER/PARASOL. The main objective is to analyse the consistency between the results derived from the active and the passive measurements. We compare the aerosol optical thickness (AOT) above optically thick clouds (cloud optical thickness (COT) larger than 3) and their Ångström exponent (AE). These parameters are retrieved with the CALIOP operational method, the POLDER operational polarization method and the CALIOP-based de-polarization ratio method (DRM) – for which we also propose a calibrated version (denominated DRM SODA , where SODA is the Synergized Optical Depth of Aerosols). We analyse 6 months of data over three distinctive regions characterized by different types of aerosols and clouds. Additionally , for these regions, we select three case studies: a biomass-burning event over the South Atlantic Ocean, a Sa-haran dust case over the North Atlantic Ocean and a Siberian biomass-burning event over the North Pacific Ocean. Four and a half years of data are studied over the entire globe for distinct situations where aerosol and cloud layers are in contact or vertically separated. Overall, the regional analysis shows a good correlation between the POLDER and the DRM SODA AOTs when the microphysics of aerosols is dominated by fine-mode particles of biomass-burning aerosols from southern Africa (correlation coefficient (R 2) of 0.83) or coarse-mode aerosols of Saharan dust (R 2 of 0.82). A good correlation between these methods (R 2 of 0.68) is also observed in the global treatment, when the aerosol and cloud layers are separated well. The analysis of detached layers also shows a mean difference in AOT of 0.07 at 532 nm between POLDER and DRM SODA at a global scale. The correlation between the retrievals decreases when a complex mixture of aerosols is expected (R 2 of 0.37) – as in the East Asia region ... Article in Journal/Newspaper North Atlantic South Atlantic Ocean Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Pacific Atmospheric Measurement Techniques 10 9 3499 3523 |