长江中下游地区冬季气温变化的时空特征及其与热带OLR的关系

本文根据10个测站1952～1987年和上海近115年1月平均气温资料,研究了长江中下游冬季气温变化的时空特征。分析了冷、暖冬的500 hPa环流特点,并着重分析了同热带OLR的关系。发现长江中下游冷(暖)冬伴随OLR负(正)距平,并同在印尼—菲律宾上升、赤道中太平洋下沉的Walker环流的强弱振动有密切关系。冷(暖)冬同强(弱)Walker环流相联系。

THE TIME-SPACE FEATURE OF THE WINTER TEMPERATURE IN THE MIDDLEAND LOWER REACHES OF THE YANGTZE RIVER AND ITS RELATION TO TROPICAL OLR

According to the Jan. mean temperature data,one coming from ten observatories along the Yangtze River lasting from 1952 to 1987,and the other from Shanghai lasting nearly 115 years,this paper studied the time-space feature of the winter temperature in the middle and lower reaches of the Yangtze River. By analysing the circulation charactor of 500 hPa in cold and warm winter,this paper finds out that in this area cold(warm) winter comes with the negtive (position) departure of OLR, and it has a close relation to strong (weak) vibration of Walker circulation which rise up in Indonisia-Philipines and comes down in the middle Pacific Ocean. Cold(warm) winter is related to strong(weak) Walker circulation.