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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, 2017, Vol. 14, No. 5, pp. 209-220

Spatial spectra of sea surface temperature and chlorophyll “a” concentration fields in the marginal seas of the northwest Pacific Ocean

T.I. Kleshcheva 1 , M.S. Permyakov 1, 2 , P.A. Salyuk 1, 3 , I.A. Golik 1 
1 V.I.Il`ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Russia
2 Far Eastern Federal University, Vladivostok, Russia
3 Adm. G.I. Nevelskoy Maritime State University, Vladivostok, Russia
Accepted: 01.06.2017
DOI: 10.21046/2070-7401-2017-14-5-209-220
From shipborne fluorometer data and data of Aqua MODIS (Moderate Resolution Imaging Spectroradiometer) for the period of 2003–2004, spatial spectra of the fluctuations of sea surface temperature (SST) and chlorophyll “a” concentration (Chl) fields were obtained in some areas of marginal seas of the northwest Pacific Ocean. The SST spectra slopes calculated from ship and satellite data varied from –2.2 to –3.1 and from –1.6 to –2.9, respectively, at scales from 4 to 160 km and were in the range of values predicted by the theories of the quasi-geostrophic turbulence. It was noted that the SST MODIS spectra were flatter compared to the ship ones, while the discrepancy between their slopes was slight, about 20 % on the average. In the wavelength range from 4 to 160 km the slopes of Chl spectra estimated according to shipborne measurements were close to –1 and consistent with theoretical estimates for the spectrum of phytoplankton. It was shown that the Chl MODIS spectra in the specified range of scales fell off about 2 times faster on the average than the ship spectra due to spatial smoothing of satellite measurements and estimates of chlorophyll “a” concentrations by the bio-optical algorithms.
Keywords: sea surface temperature, chlorophyll “a” concentration, spectra, shipborne fluorometer, remote sensing, tracer
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