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| Titel |
Possible shift of spectral response function of the MODIS 6.8 μm water vapor channel causing a cold bias of 2–3 K |
| VerfasserIn |
B. J. Sohn, B.-R. Kim, S.-S. Lee |
| 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 ; 3, no. 6 ; Nr. 3, no. 6 (2010-12-03), S.1667-1672 |
| Datensatznummer |
250001367
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| Publikation (Nr.) |
 copernicus.org/amt-3-1667-2010.pdf |
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| Zusammenfassung |
| The calibration of the Moderate-resolution Imaging Spectroradiometer (MODIS)
6.8 μm water vapor (WV) channel was assessed by comparing Terra/MODIS
measurements with the WV channel brightness temperatures equivalent to
Infrared Atmospheric Sounding Interferometer (IASI) measurements for June 2007 and December 2007. IASI spectral information was transferred to the
Japanese Multifunctional Transport Satellite (MTSAT)-1R WV channel and then
to the MODIS WV channel. Results indicate that the MODIS WV channel is
biased low by 2–3 K, possibly caused by the shift of the spectral response
function by about +11 cm−1. This finding is particularly important
because the bias of −3 K can cause about +30% relative errors in the
retrieval of upper tropospheric humidity (UTH) over the tropics. In other
words, the current MODIS measurements may result in higher UTH values,
showing relative errors up to +30%. |
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