SPATIAL-TEMPORAL MULTIYEAR CHANGES IN THE CONCENTRATION OF CHLOROPHYLL-A OF PHYTOPLANKTON IN THE NORTHWESTERN COASTAL ZONE OF THE SEA OF JAPAN

Abstract

Nerhyto-pelagicals (the coastal zone) is where life is abundant. Phytoplankton development supports the productivity of all subsequent trophic links of a marine ecosystem. Phytoplankton «blooming» takes place in the coastal zones due tor terrogenic and biogenic materials supplied by rivers. To study the spatial-temporal dynamics of phytoplankton chlorophyll-a in the coastal zone of the northwest of the Sea of Japan, we are employed two approaches: landscape-bionomic zoning and space monitoring. The first one is based on the theory suggested by K.M. Petrov. According to it, the regional features of phytoplankton «blooming» in the coastal are regarded with account for three vectors of changes in natural conditions – vertical, latitudinal and azonal. The second approach is based on remote sensing data available due to the operation of the polar-orbital satellite ''Aqua'', NASA. The satellite data, i.e. space images, allow to compare sea surface temperature with chlorophyll concentration based on numerical data obtained with the MODIS-Aqua spectroradiometer in 2013 through 2022. The key feature of present study is the joint use of the two approaches for delineating of regularities of changes in landscape-bionomic environmental conditions and in remote data on temperature and chlorophyll levels in the coastal zone of the northwest of the Sea of Japan.