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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, 2018, Vol. 15, No. 7, pp. 153-162

Spatial variability of primary production and regionalization of the Kara Sea from MODIS-Aqua data

A.B. Demidov 1 , S.V. Sheberstov 1 , V.I. Gagarin 1 
1 Shirshov Institute of Oceanology RAS, Moscow, Russia
Accepted: 29.10.2018
DOI: 10.21046/2070-7401-2018-15-7-153-162
For the first time spatial variability of water column primary production (IPP) and regionalization of the Kara Sea were performed using region-specific models and MODIS-Aqua data. Region-specific empirical IPP and chlorophyll algorithms were developed and verified based on field observations in autumn (predominantly in September and October). On the basis of multiyear (2002–2015) averaged data we assigned six productivity regions in the Kara Sea. Inherent property of Ob and Enisey estua­ries is low (<10 psu) annual averaged surface salinity. Inner (<100 m) and Outer shelf (100–200 m) are influenced by river discharge year round. Alternatively, Southwestern region is under river discharge to a lesser degree. The Northwestern region and Northeastern region coincide with St. Anna trough and Voronin’s trough, respectively. Regionally averaged primary production values ranged from 109 to 264 mgC/m 2 per day that corresponds to mesotrophic level of IPP. Latitudinal and longitudinal zonality in IPP distribution was established in the Kara Sea river discharge region and northern region, respectively.
Keywords: primary production, chlorophyll, spatial variability, remote sensing, regionalization
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