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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2016, Vol. 13, No. 3, pp. 125-135

Validation of operational sea surface temperature satellite monitoring products against surface drifter data for the Black Sea during the 2013-2014 cold season

N.V. Mikhailova 1 , T.M. Bayankina 1 , S.V. Motyzhev 1 , M.V. Cryl 1 , A.P. Tolstosheev 1 , E.G. Lunev 1 
1 Marine Hydrophysical Institute RAS, Sevastopol, Russia
Accepted: 26.04.2016
DOI: 10.21046/2070-7401-2016-13-3-125-135
Eight high-resolution operational satellite monitoring products of the Black Sea surface temperature: CMS_L3 (France), CNR (Italy), OSTIA (United Kingdom), CMC (Canada), DMI (Dania), GAMSSA (Australia), ODYSSEA (France), NOAA (USA) have been validated. Measurements in situ were provided by automatic surface free drifting buoys (drifters) of Iridium SVP-BTC80RTC/GPS type. Validation procedure is based on night SST measurements and during the cold season 2013-2014 to avoid errors due to diurnal sea surface temperature warming. The highest accuracy is shown by OSTIA (mean bias -0.14°C, root mean square error 0.24°C), GAMSSA (mean bias -0.05°C, root mean square error 0.28°C), CMC (mean bias 0.06°C, root mean square error 0.30°C). The uncertainties of SST retrievals depend on both retrieval algorithm and environmental conditions. Conditions that cause big errors are the Black Sea hydrological processes such as sea water freshening due to river inflows, ice formation and melting, anomalous atmospheric water vapor vertical distributions and amounts. The effectiveness of cloud detection is of great importance. The failure to recognize some cloud covers leads to admixing of colder cloud top temperatures and, consequently, negative SST bias.
Keywords: Black Sea, operational satellite monitoring, sea surface temperature, drifter, validation, remote sensing errors
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