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| Titel |
Critical evaluation of cloud contamination in the MISR aerosol products using MODIS cloud mask products |
| VerfasserIn |
Y. Shi, J. Zhang, J. S. Reid, B. Liu, E. J. Hyer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 6 ; Nr. 7, no. 6 (2014-06-23), S.1791-1801 |
| Datensatznummer |
250115824
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| Publikation (Nr.) |
 copernicus.org/amt-7-1791-2014.pdf |
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| Zusammenfassung |
| Using Terra Moderate Resolution Imaging Spectroradiometer (MODIS)-based cloud
screening methods, the impacts of cloud contamination on
the Terra Multi-angle Imaging Spectroradiometer (MISR) aerosol optical depth
(AOD) product are evaluated.
Based on one year of collocated MISR and MODIS data,
this study suggests that cloud contamination exists in both over-water and over-land
MISR AOD data, with heavier cloud contamination occurring over the high
latitude southern hemispheric oceans. On average globally, this study shows
that thin cirrus cloud contamination introduces a possible ~ 0.01 high
bias for the over-water MISR AOD retrievals. Over the mid- to high-latitude
oceans and Southeast Asia, this number increases to 0.015–0.02. However,
biases much larger than this mean value are found in individual retrievals,
especially in retrievals that are near cloud edges. This study suggests that
cloud-clearing methods using observations from MISR alone, which has only
visible and near-infrared channels, may not be sufficient for all scenarios.
Measurements from MODIS can be applied to assist cloud-clearing of the MISR
aerosol retrievals. Cloud screening algorithms based on multi-sensor
approaches are feasible and should be considered for current and future
satellite aerosol studies. |
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