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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, 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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