西太平洋西北海域海温与北半球大气环流相互作用的统计分析

THE STATISTICS ANALYSIS OF THE INTERACTION BETWEEN SEA-SURFACE TEMPERATURE IN NORTH-WEST PACIFIC AND 500hPa SUBTROPICAL HIGH IN WEST PACIFIC AND POLAR VOTEX

海洋与大气相互作用及其对天气气候影响的研究工作已取得了一些令人满意的成果。研究表明,海洋异常信号,不仅存在于全球热带的温面温度、气压、风和云量以及洋流强度等气象要素场中,而且反映在世界许多地区的大气环流和气候年际变化中。

In this paper, the relation of sea-surface temperature in north-west Pacific and 500 hPa subtropical high in west Pacific and polar votex is studied by using the typical correlation method. The principal resuits are obtained as follows:(1) The lag correlation time of sea-surface temperature is 2 and 9 months. When the lag time is about 9 months, intensity and displacement of subtropical high in west Pacific and intensity of polar votex exert an influence on sea-surface temperature. The sea-surface temperature is in good correlation with subtropical high in west Pacific when lag time is about 2 months.(2) At the same time, interaction exists between displacement of ridge line, intensity in subtropical high and intensity of polar votex and the sea-surface temperature. There is a ma-ximun interaction between region I, region II and ridge line of subtropical high in west Pacific. Intensity of 500 hPa polar votex exhibits a far correlation with sea-surface temperature in the region III. It is clear that tropical atmospheric circulation exerts direct influence on sea-surface temperature in regions I and II.(3) It is also found that the lag correlation time of atmospheric circulation is about 1 month and 3 to 6 months. Sea-surface temperature influences the subtropical high in west Pacific and intensity of polar votex when lag time is about 3 to 6 months. Close correlation of sea-surface temperature, in the reigons I and III with subtropical high exists in west pacific.