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| Titel |
Validation of the GRAPE single view aerosol retrieval for ATSR-2 and insights into the long term global AOD trend over the ocean |
| VerfasserIn |
G. E. Thomas, C. A. Poulsen, R. Siddans, A. M. Sayer, E. Carboni, S. H. Marsh, S. M. Dean, R. G. Grainger, B. N. Lawrence |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 10 ; Nr. 10, no. 10 (2010-05-26), S.4849-4866 |
| Datensatznummer |
250008481
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| Publikation (Nr.) |
 copernicus.org/acp-10-4849-2010.pdf |
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| Zusammenfassung |
The 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. |
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