ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2020, Vol. 17, No. 4, pp. 29-37

Regionally adapted algorithm for the recovery of chlorophyll a concentration for the Black Sea, analysis of the reasons for the difference between satellite and contact data

R.R. Stanichnaya 1 , S.V. Stanichny 1 , E.G. Arashkevich 2 
1 Marine Hydrophysical Institute RAS, Sevastopol, Russia
2 Shirshov Institute of Oceanology RAS, Moscow, Russia
Accepted: 10.07.2020
DOI: 10.21046/2070-7401-2020-17-4-29-37
The paper proposes a regression method for correcting standard chlorophyll a concentration data of the MODIS-Aqua satellite sensor for the Black Sea. Regression coefficients are obtained by compa­ring satellite and contact measurements for the northeastern Black Sea for 2006–2017. Two formulas for satellite data correction are considered: linear and logarithmic. The resulting estimation error in both cases was 0.1 mg/m3 in the concentration range up to 1 mg/m3. The reasons of possible difference of satellite and contact measurements related to spatial inhomogeneity of chlorophyll a concentration on scale of about 1 km (area of averaging of satellite sensor), nonsynchronous measurements leading to displacement of spatial structures in presence of currents, as well as with possible change of chlorophyll a concentration with depth in the zone of signal formation of optical radiometers (~0–10 m) are considered.
Keywords: chlorophyll, remote sensing, in situ data, regional algorithm, Black Sea
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