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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. 2, pp. 201-210

Spatial and temporal variability of reflectance coefficient of Gorky Reservoir waters: results of 2016–2017 expeditions

A.A. Molkov 1 , E.N. Korchemkina 2 , D.V. Kalinskaya 2 , I.A. Kapustin 1 
1 Institute of Applied Physics RAS, Nizhny Novgorod, Russia
2 Marine Hydrophysical Institute RAS, Sevastopol, Russia
Accepted: 19.03.2018
DOI: 10.21046/2070-7401-2018-15-2-201-210
The aim of this work is to analyze the spatial and temporal variability of spectral reflectance coefficient in waters of Gorky Reservoir located on Volga, the main waterway of Central Russia. The Reservoir represents an example of internal freshwater body characterized by regular blue-green algae blooms. The article presents the results of field measurements conducted in summer seasons of 2016–2017 including ship measurements of water column reflectance coefficient, the transparency of the atmosphere and the accompanying measurements of the hydrological and biooptical characteristics necessary for the verification and interpretation of the results. The atmospheric correction of several MODIS satellite images was performed and a satisfactory correspondence between remote and contact measurements of reflectance coefficient spectra was established. Reasons for the discrepancy and the ways of its elimination are discussed. The prospects for further research in order to develop a regional bio-optical algorithm for monitoring the bioproductivity of Gorky reservoir waters using space color scanners are shown.
Keywords: Gorky Reservoir, water reflectance coefficient, regional biooptical algorithm, phytoplankton, chlorophyll-a, blue-green algae, suspended matter, dissolved organic matter
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