Structure of water during the feeding migration period of the Pacific squid in the Sea of Japan according to satellite data

According to the sea surface temperature archive for 2018-2023, reconstructed from satellite data AQUA, TERRA (MODIS spectroradiometer), with a spatial resolution of 1 km, obtained and processed at the Center for Collective Use of the Regional Satellite Monitoring of the Environment, Far Eastern Branch of the Russian Academy of Sciences, thermal and dynamic water conditions in the northwestern part of the Sea of Japan and the areas of longline (jigger) fishing for Pacific squid in the Sea of Japan are considered. Analysis of satellite materials made it possible to identify hydrological elements of the thermal structure in the field of the spatial distribution of ocean surface temperature, in which Pacific squid fishing was successfully carried out. First of all, the formation of TC fishing areas depends on the development or weakening of the branches of the Tsushima and Primorsky currents, and the presence of mesoscale eddy structures in their waters. In most cases, TC accumulations are confined to areas of eddy upwelling. Maximum catches are concentrated on the periphery of subtropical anticyclonic eddies bordering subarctic waters. If the eddy had a spiral structure, then the clusters are mainly concentrated in the center of the eddy. If the influx of subtropical waters took the form of a mushroom-shaped current, then large catches were mainly observed in the current jet and in the zone of anticyclonic and cyclonic eddy of the dipole. In the frontal zone of subtropical and subarctic waters, squid fishing areas were located on the warm side of the Subarctic (Polar) front.