Retrieval of spectral aerosol optical thickness over land using ocean color sensors MERIS and SeaWiFS
For the determination of aerosol optical thickness (AOT) Bremen AErosol Retrieval (BAER) has been developed. Method and main features on the aerosol retrieval are described together with validation and results. The retrieval separates the spectral aerosol reflectance from surface and Rayleigh path r...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00027871 2023-05-15T13:06:35+02:00 Retrieval of spectral aerosol optical thickness over land using ocean color sensors MERIS and SeaWiFS von Hoyningen-Huene, W. Yoon, J. Vountas, M. Istomina, L. G. Rohen, G. Dinter, T. Kokhanovsky, A. A. Burrows, J. P. 2011-02 electronic https://doi.org/10.5194/amt-4-151-2011 https://noa.gwlb.de/receive/cop_mods_00027871 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00027826/amt-4-151-2011.pdf https://amt.copernicus.org/articles/4/151/2011/amt-4-151-2011.pdf eng eng Copernicus Publications Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-4-151-2011 https://noa.gwlb.de/receive/cop_mods_00027871 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00027826/amt-4-151-2011.pdf https://amt.copernicus.org/articles/4/151/2011/amt-4-151-2011.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2011 ftnonlinearchiv https://doi.org/10.5194/amt-4-151-2011 2022-02-08T22:48:29Z For the determination of aerosol optical thickness (AOT) Bremen AErosol Retrieval (BAER) has been developed. Method and main features on the aerosol retrieval are described together with validation and results. The retrieval separates the spectral aerosol reflectance from surface and Rayleigh path reflectance for the shortwave range of the measured spectrum of top-of-atmosphere reflectance for wavelength less than 0.670 μm. The advantage of MERIS (Medium Resolution Imaging Spectrometer on the Environmental Satellite – ENVISAT – of the European Space Agency – ESA) and SeaWiFS (Sea viewing Wide Field Sensor on OrbView-2 spacecraft) observations is the availability of several spectral channels in the blue and visible range enabling the spectral determination of AOT in 7 (or 6) channels (0.412–0.670 μm) and additionally channels in the NIR, which can be used to characterize the surface properties. A dynamical spectral surface reflectance model for different surface types is used to obtain the spectral surface reflectance for this separation. The normalized differential vegetation index (NDVI), taken from the satellite observations, is the model input. Further surface bi-directional reflectance distribution function (BRDF) is considered by the Raman-Pinty-Verstraete (RPV) model. Spectral AOT is obtained from aerosol reflectance using look-up-tables, obtained from radiative transfer calculations with given aerosol phase functions and single scattering albedos either from aerosol models, given by model package "optical properties of aerosol components" (OPAC) or from experimental campaigns. Validations of the obtained AOT retrieval results with data of Aerosol Robotic Network (AERONET) over Europe gave a preference for experimental phase functions derived from almucantar measurements. Finally long-term observations of SeaWiFS have been investigated for 11 year trends in AOT. Western European regions have negative trends with decreasing AOT with time. For the investigated Asian region increasing AOT have been found. Article in Journal/Newspaper Aerosol Robotic Network Niedersächsisches Online-Archiv NOA Atmospheric Measurement Techniques 4 2 151 171 |
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article Verlagsveröffentlichung von Hoyningen-Huene, W. Yoon, J. Vountas, M. Istomina, L. G. Rohen, G. Dinter, T. Kokhanovsky, A. A. Burrows, J. P. Retrieval of spectral aerosol optical thickness over land using ocean color sensors MERIS and SeaWiFS |
topic_facet |
article Verlagsveröffentlichung |
description |
For the determination of aerosol optical thickness (AOT) Bremen AErosol Retrieval (BAER) has been developed. Method and main features on the aerosol retrieval are described together with validation and results. The retrieval separates the spectral aerosol reflectance from surface and Rayleigh path reflectance for the shortwave range of the measured spectrum of top-of-atmosphere reflectance for wavelength less than 0.670 μm. The advantage of MERIS (Medium Resolution Imaging Spectrometer on the Environmental Satellite – ENVISAT – of the European Space Agency – ESA) and SeaWiFS (Sea viewing Wide Field Sensor on OrbView-2 spacecraft) observations is the availability of several spectral channels in the blue and visible range enabling the spectral determination of AOT in 7 (or 6) channels (0.412–0.670 μm) and additionally channels in the NIR, which can be used to characterize the surface properties. A dynamical spectral surface reflectance model for different surface types is used to obtain the spectral surface reflectance for this separation. The normalized differential vegetation index (NDVI), taken from the satellite observations, is the model input. Further surface bi-directional reflectance distribution function (BRDF) is considered by the Raman-Pinty-Verstraete (RPV) model. Spectral AOT is obtained from aerosol reflectance using look-up-tables, obtained from radiative transfer calculations with given aerosol phase functions and single scattering albedos either from aerosol models, given by model package "optical properties of aerosol components" (OPAC) or from experimental campaigns. Validations of the obtained AOT retrieval results with data of Aerosol Robotic Network (AERONET) over Europe gave a preference for experimental phase functions derived from almucantar measurements. Finally long-term observations of SeaWiFS have been investigated for 11 year trends in AOT. Western European regions have negative trends with decreasing AOT with time. For the investigated Asian region increasing AOT have been found. |
format |
Article in Journal/Newspaper |
author |
von Hoyningen-Huene, W. Yoon, J. Vountas, M. Istomina, L. G. Rohen, G. Dinter, T. Kokhanovsky, A. A. Burrows, J. P. |
author_facet |
von Hoyningen-Huene, W. Yoon, J. Vountas, M. Istomina, L. G. Rohen, G. Dinter, T. Kokhanovsky, A. A. Burrows, J. P. |
author_sort |
von Hoyningen-Huene, W. |
title |
Retrieval of spectral aerosol optical thickness over land using ocean color sensors MERIS and SeaWiFS |
title_short |
Retrieval of spectral aerosol optical thickness over land using ocean color sensors MERIS and SeaWiFS |
title_full |
Retrieval of spectral aerosol optical thickness over land using ocean color sensors MERIS and SeaWiFS |
title_fullStr |
Retrieval of spectral aerosol optical thickness over land using ocean color sensors MERIS and SeaWiFS |
title_full_unstemmed |
Retrieval of spectral aerosol optical thickness over land using ocean color sensors MERIS and SeaWiFS |
title_sort |
retrieval of spectral aerosol optical thickness over land using ocean color sensors meris and seawifs |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/amt-4-151-2011 https://noa.gwlb.de/receive/cop_mods_00027871 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00027826/amt-4-151-2011.pdf https://amt.copernicus.org/articles/4/151/2011/amt-4-151-2011.pdf |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-4-151-2011 https://noa.gwlb.de/receive/cop_mods_00027871 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00027826/amt-4-151-2011.pdf https://amt.copernicus.org/articles/4/151/2011/amt-4-151-2011.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/amt-4-151-2011 |
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Atmospheric Measurement Techniques |
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4 |
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2 |
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151 |
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171 |
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1766012195163865088 |