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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, 2016, Vol. 13, No. 3, pp. 114-124

Study of the cycles of phytoplankton blooms in the Baltic Sea from Aqua MODIS data

N.V. Evtushenko 1 , S.V. Sheberstov 1 
1 P.P. Shirshov Institute of Oceanology RAS, Moscow, Russia
Accepted: 07.05.2016
DOI: 10.21046/2070-7401-2016-13-3-114-124
The cycles of the blooms in the Baltic Sea were studied by using satellite data from Aqua MODIS sensor from 2003 to 2014. Chlorophyll concentration derived from satellite data was used as the bloom parameter. Three regions in the Baltic Sea were considered: the central and south-eastern parts and the Gulf of Finland. The calculation was made using regional algorithms verified according to the in-situ measurements. The algorithms were applied to daily-averaged L3 remote sensing reflectances Rrs; the resulting chlorophyll concentrations were averaged for each of the regions, and then smoothed using moving average method. For the central and southeastern region, 3 periods of bloom were found: in spring, in summer and in autumn; for the Gulf of Finland, the autumn bloom is not typical. Comparison of chlorophyll concentration time series for each region during 2003–2014 with data for every year separately allowed to reveal the maximum and minimum seasonal values during plankton blooms. The factors were examined that influence the identified cyclical phytoplankton blooms, such as sea surface temperature, wind speed, nitrogen, and phosphorus concentration. Probable causes of the revealed distribution of chlorophyll in three regions of the Baltic Sea were established.
Keywords: Baltic Sea, satellite data, phytoplankton, chlorophyll concentration
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