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| Titel |
In situ autonomous optical radiometry measurements for satellite ocean color validation in the Western Black Sea |
| VerfasserIn |
G. Zibordi, F. Mélin, J.-F. Berthon, M. Talone |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 11, no. 2 ; Nr. 11, no. 2 (2015-03-26), S.275-286 |
| Datensatznummer |
250117177
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| Publikation (Nr.) |
 copernicus.org/os-11-275-2015.pdf |
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| Zusammenfassung |
| The accuracy of primary satellite ocean color data products from the Moderate
Resolution Imaging Spectroradiometer on-board Aqua (MODIS-A) and the
Visible/Infrared Imager/Radiometer Suite (VIIRS) is investigated in the
Western Black Sea using in situ measurements from the Gloria site included in
the ocean color component of the Aerosol Robotic Network (AERONET-OC). The
analysis is also extended to an additional well-established AERONET-OC site
in the northern Adriatic Sea characterized by optically complex coastal
waters exhibiting similarities to those observed at the Gloria site. Results
from the comparison of normalized water-leaving radiance LWN
indicate biases of a few percent between satellite-derived and in situ data
at the center wavelengths relevant for the determination of chlorophyll a
concentrations (443–547 nm, or equivalent). Remarkable is the consistency
between the annual cycle determined with time series of satellite-derived and
in situ LWN ratios at these center wavelengths. Contrarily, the
differences between in situ and satellite-derived LWN are
pronounced at the blue (i.e., 412 nm) and red (i.e., 667 nm, or equivalent)
center wavelengths, confirming difficulties in confidently applying
satellite-derived radiometric data from these spectral regions for
quantitative analysis in optically complex waters. |
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