Validation of the GRAPE single view aerosol retrieval for ATSR-2 and insights into the long term global AOD trend over the ocean

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dc.contributor.authorThomas, G. E.
dc.contributor.authorPoulsen, C. A.
dc.contributor.authorSiddans, R.
dc.contributor.authorSayer, Andrew
dc.contributor.authorCarboni, E.
dc.contributor.authorMarsh, S. H.
dc.contributor.authorDean, S. M.
dc.contributor.authorGrainger, R. G.
dc.contributor.authorLawrence, B. N.
dc.date.accessioned2024-04-29T17:01:32Z
dc.date.available2024-04-29T17:01:32Z
dc.date.issued2010-05-26
dc.description.abstractThe Global Retrieval of ATSR Cloud Parameters and Evaluation (GRAPE) project has produced a global data-set of cloud and aerosol properties from the Along Track Scanning Radiometer-2 (ATSR-2) instrument, covering the time period 1995–2001. This paper presents the validation of aerosol optical depths (AODs) over the ocean from this product against AERONET sun-photometer measurements, as well as a comparison to the Advanced Very High Resolution Radiometer (AVHRR) optical depth product produced by the Global Aerosol Climatology Project (GACP). The GRAPE AOD over ocean is found to be in good agreement with AERONET measurements, with a Pearson's correlation coefficient of 0.79 and a best-fit slope of 1.0±0.1, but with a positive bias of 0.08±0.04. Although the GRAPE and GACP datasets show reasonable agreement, there are significant differences. These discrepancies are explored, and suggest that the downward trend in AOD reported by GACP may arise from changes in sampling due to the orbital drift of the AVHRR instruments.
dc.description.sponsorshipThis work was supported by the Natural Environment Research Council (grant numbers NER/T/S/2001/002, NE/B503933/1 and NE/E011187/1). Additional support was provided by the ESA Data User Element project Globaerosol. We also greatfully acknowledge the principal investigators of the AERONET sites utilised by this work, as well as NASA Goddard for making AERONET and GACP data available.
dc.description.urihttps://acp.copernicus.org/articles/10/4849/2010/
dc.format.extent18 pages
dc.genrejournal articles
dc.identifierdoi:10.13016/m2kudt-kkli
dc.identifier.citationThomas, G. E., C. A. Poulsen, R. Siddans, A. M. Sayer, E. Carboni, S. H. Marsh, S. M. Dean, R. G. Grainger, and B. N. Lawrence. “Validation of the GRAPE Single View Aerosol Retrieval for ATSR-2 and Insights into the Long Term Global AOD Trend over the Ocean.” Atmospheric Chemistry and Physics 10, no. 10 (May 26, 2010): 4849–66. https://doi.org/10.5194/acp-10-4849-2010.
dc.identifier.urihttps://doi.org/10.5194/acp-10-4849-2010
dc.identifier.urihttp://hdl.handle.net/11603/33439
dc.language.isoen_US
dc.publisherEGU
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC GESTAR II
dc.rightsCC BY 3.0 DEED Attribution 3.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/deed.en
dc.titleValidation of the GRAPE single view aerosol retrieval for ATSR-2 and insights into the long term global AOD trend over the ocean
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0001-9149-1789

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