Климатические изменения в Японском море и прилегающих районах в 20-м столетии

The long-term variations and climatic trends of water temperature, dissolved oxygen and silicate concentrations in the Japan Sea deep basins as well as air temperature and precipitation in the adjacent land region are investigated by using observation data for the 20th century. Statistically significant centennial warming trends were revealed mainly in deep water temperature (below 250 m) and in air temperature for all seasons in the southern and eastern land regions adjacent to the Japan Sea. In the bottom layer below 2250 m significant positive potential temperature trend was also revealed, but only for the second half of the 20th century. The swift quasidecadal potential temperature increase from 1984 to 1995 was revealed in the deep and bottom waters. Temperature rising of both 50-years and decadal scale accompanies the vertical stability increase, dissolved oxygen decrease and silicate increase in the deep waters, that point to lower ventilation of deep basins during the mentioned periods of warming.