Optimizing CALIPSO saharan dust retrievals
We demonstrate improvements in CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) dust extinction retrievals over northern Africa and Europe when corrections are applied regarding the Saharan dust lidar ratio assumption, the separation of the dust portion in detected dust m...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2013
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Online Access: | http://hdl.handle.net/2117/21999 https://doi.org/10.5194/acp-13-12089-2013 |
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ftupcatalunyair:oai:upcommons.upc.edu:2117/21999 |
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Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
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ftupcatalunyair |
language |
English |
topic |
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental Radar meteorology Air quality -- Measurement Mineral dust Artificial satellites in remote sensing Infrared radiation Atmospheric aerosols GEOBASE Subject Index: aerosol CALIPSO detection method dust lidar MODIS optical depth optimization spatial variation Regional Index: Africa Europe Sahara Radarmeteorologia Aire -- Qualitat -- Mesurament Pols mineral Satèl·lits artificials en teledetecció Raigs infraroigs Aerosols atmosfèrics |
spellingShingle |
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental Radar meteorology Air quality -- Measurement Mineral dust Artificial satellites in remote sensing Infrared radiation Atmospheric aerosols GEOBASE Subject Index: aerosol CALIPSO detection method dust lidar MODIS optical depth optimization spatial variation Regional Index: Africa Europe Sahara Radarmeteorologia Aire -- Qualitat -- Mesurament Pols mineral Satèl·lits artificials en teledetecció Raigs infraroigs Aerosols atmosfèrics Amiridis, Vassilis Wandinger, Ulla Marinou, E. Giannakaki, E. Tsekeri, A. Basart Alpuente, Sara Kazadzis, Stylianos Gkikas, A. Taylor, M. Baldasano Recio, José María Ansmann, Albert Optimizing CALIPSO saharan dust retrievals |
topic_facet |
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental Radar meteorology Air quality -- Measurement Mineral dust Artificial satellites in remote sensing Infrared radiation Atmospheric aerosols GEOBASE Subject Index: aerosol CALIPSO detection method dust lidar MODIS optical depth optimization spatial variation Regional Index: Africa Europe Sahara Radarmeteorologia Aire -- Qualitat -- Mesurament Pols mineral Satèl·lits artificials en teledetecció Raigs infraroigs Aerosols atmosfèrics |
description |
We demonstrate improvements in CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) dust extinction retrievals over northern Africa and Europe when corrections are applied regarding the Saharan dust lidar ratio assumption, the separation of the dust portion in detected dust mixtures, and the averaging scheme introduced in the Level 3 CALIPSO product. First, a universal, spatially constant lidar ratio of 58 sr instead of 40 sr is applied to individual Level 2 dust-related backscatter products. The resulting aerosol optical depths show an improvement compared with synchronous and collocated AERONET (Aerosol Robotic Network) measurements. An absolute bias of the order of -0.03 has been found, improving on the statistically significant biases of the order of -0.10 reported in the literature for the original CALIPSO product. When compared with the MODIS (Moderate-Resolution Imaging Spectroradiometer) collocated aerosol optical depth (AOD) product, the CALIPSO negative bias is even less for the lidar ratio of 58 sr. After introducing the new lidar ratio for the domain studied, we examine potential improvements to the climatological CALIPSO Level 3 extinction product: (1) by introducing a new methodology for the calculation of pure dust extinction from dust mixtures and (2) by applying an averaging scheme that includes zero extinction values for the nondust aerosol types detected. The scheme is applied at a horizontal spatial resolution of 1 × 1 for ease of comparison with the instantaneous and collocated dust extinction profiles simulated by the BSC-DREAM8b dust model. Comparisons show that the extinction profiles retrieved with the proposed methodology reproduce the well-known model biases per subregion examined. The very good agreement of the proposed CALIPSO extinction product with respect to AERONET, MODIS and the BSC-DREAM8b dust model makes this dataset an ideal candidate for the provision of an accurate and robust multiyear dust climatology over northern Africa and Europe Postprint ... |
author2 |
Universitat Politècnica de Catalunya. Departament de Projectes d'Enginyeria Universitat Politècnica de Catalunya. MTA - Modelització i Tecnologia Ambiental |
format |
Article in Journal/Newspaper |
author |
Amiridis, Vassilis Wandinger, Ulla Marinou, E. Giannakaki, E. Tsekeri, A. Basart Alpuente, Sara Kazadzis, Stylianos Gkikas, A. Taylor, M. Baldasano Recio, José María Ansmann, Albert |
author_facet |
Amiridis, Vassilis Wandinger, Ulla Marinou, E. Giannakaki, E. Tsekeri, A. Basart Alpuente, Sara Kazadzis, Stylianos Gkikas, A. Taylor, M. Baldasano Recio, José María Ansmann, Albert |
author_sort |
Amiridis, Vassilis |
title |
Optimizing CALIPSO saharan dust retrievals |
title_short |
Optimizing CALIPSO saharan dust retrievals |
title_full |
Optimizing CALIPSO saharan dust retrievals |
title_fullStr |
Optimizing CALIPSO saharan dust retrievals |
title_full_unstemmed |
Optimizing CALIPSO saharan dust retrievals |
title_sort |
optimizing calipso saharan dust retrievals |
publishDate |
2013 |
url |
http://hdl.handle.net/2117/21999 https://doi.org/10.5194/acp-13-12089-2013 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/316210/EU/Building Capacity for a Centre of Excellence for EO-based monitoring of Natural Disasters/BEYOND info:eu-repo/grantAgreement/EC/FP7/262254/EU/Aerosols, Clouds, and Trace gases Research Infrastructure Network/ACTRIS info:eu-repo/grantAgreement/EC/FP7/247492/EU/Aerosol and Cloud Influence on global surface UV irradiance retrieved from satellite sensors/ACI-UV info:eu-repo/grantAgreement/EC/FP7/300515/EU/Global mapping of aerosol properties using neural network inversions of ground and satellite based data/AEROMAP Amiridis, V. [et al.]. Optimizing CALIPSO saharan dust retrievals. "Atmospheric chemistry and physics", 13 Desembre 2013, vol. 13, núm. 23, p. 12089-12106. 1680-7316 http://hdl.handle.net/2117/21999 doi:10.5194/acp-13-12089-2013 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access |
op_doi |
https://doi.org/10.5194/acp-13-12089-2013 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
13 |
container_issue |
23 |
container_start_page |
12089 |
op_container_end_page |
12106 |
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1810451510154231808 |
spelling |
ftupcatalunyair:oai:upcommons.upc.edu:2117/21999 2024-09-15T17:35:19+00:00 Optimizing CALIPSO saharan dust retrievals Amiridis, Vassilis Wandinger, Ulla Marinou, E. Giannakaki, E. Tsekeri, A. Basart Alpuente, Sara Kazadzis, Stylianos Gkikas, A. Taylor, M. Baldasano Recio, José María Ansmann, Albert Universitat Politècnica de Catalunya. Departament de Projectes d'Enginyeria Universitat Politècnica de Catalunya. MTA - Modelització i Tecnologia Ambiental 2013-12-13 18 p. application/pdf http://hdl.handle.net/2117/21999 https://doi.org/10.5194/acp-13-12089-2013 eng eng info:eu-repo/grantAgreement/EC/FP7/316210/EU/Building Capacity for a Centre of Excellence for EO-based monitoring of Natural Disasters/BEYOND info:eu-repo/grantAgreement/EC/FP7/262254/EU/Aerosols, Clouds, and Trace gases Research Infrastructure Network/ACTRIS info:eu-repo/grantAgreement/EC/FP7/247492/EU/Aerosol and Cloud Influence on global surface UV irradiance retrieved from satellite sensors/ACI-UV info:eu-repo/grantAgreement/EC/FP7/300515/EU/Global mapping of aerosol properties using neural network inversions of ground and satellite based data/AEROMAP Amiridis, V. [et al.]. Optimizing CALIPSO saharan dust retrievals. "Atmospheric chemistry and physics", 13 Desembre 2013, vol. 13, núm. 23, p. 12089-12106. 1680-7316 http://hdl.handle.net/2117/21999 doi:10.5194/acp-13-12089-2013 Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental Radar meteorology Air quality -- Measurement Mineral dust Artificial satellites in remote sensing Infrared radiation Atmospheric aerosols GEOBASE Subject Index: aerosol CALIPSO detection method dust lidar MODIS optical depth optimization spatial variation Regional Index: Africa Europe Sahara Radarmeteorologia Aire -- Qualitat -- Mesurament Pols mineral Satèl·lits artificials en teledetecció Raigs infraroigs Aerosols atmosfèrics Article 2013 ftupcatalunyair https://doi.org/10.5194/acp-13-12089-2013 2024-07-25T10:54:03Z We demonstrate improvements in CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) dust extinction retrievals over northern Africa and Europe when corrections are applied regarding the Saharan dust lidar ratio assumption, the separation of the dust portion in detected dust mixtures, and the averaging scheme introduced in the Level 3 CALIPSO product. First, a universal, spatially constant lidar ratio of 58 sr instead of 40 sr is applied to individual Level 2 dust-related backscatter products. The resulting aerosol optical depths show an improvement compared with synchronous and collocated AERONET (Aerosol Robotic Network) measurements. An absolute bias of the order of -0.03 has been found, improving on the statistically significant biases of the order of -0.10 reported in the literature for the original CALIPSO product. When compared with the MODIS (Moderate-Resolution Imaging Spectroradiometer) collocated aerosol optical depth (AOD) product, the CALIPSO negative bias is even less for the lidar ratio of 58 sr. After introducing the new lidar ratio for the domain studied, we examine potential improvements to the climatological CALIPSO Level 3 extinction product: (1) by introducing a new methodology for the calculation of pure dust extinction from dust mixtures and (2) by applying an averaging scheme that includes zero extinction values for the nondust aerosol types detected. The scheme is applied at a horizontal spatial resolution of 1 × 1 for ease of comparison with the instantaneous and collocated dust extinction profiles simulated by the BSC-DREAM8b dust model. Comparisons show that the extinction profiles retrieved with the proposed methodology reproduce the well-known model biases per subregion examined. The very good agreement of the proposed CALIPSO extinction product with respect to AERONET, MODIS and the BSC-DREAM8b dust model makes this dataset an ideal candidate for the provision of an accurate and robust multiyear dust climatology over northern Africa and Europe Postprint ... Article in Journal/Newspaper Aerosol Robotic Network Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge Atmospheric Chemistry and Physics 13 23 12089 12106 |