东亚冬、夏季风的年代际振荡及其对夏季西太平洋副高和贵州降水的影响

Vibration Between Years of Dry & Wet Monsoons in East Asia And TheirInfluence to subtropical High Pressure And Rainfall in Guizhou Province

主要研究了东亚冬、夏季风不同长度的年代际振荡特点及其对夏季百太平洋副高和贵州降水的影响。分析表明：冬季风与赤道东太平洋海温存在着大体一致的约３０年左右年代际振荡，７０年代末发生突变；夏季风与青藏高原位势高度存在着大体一致的约２０年左右的年代际振荡，６０年代末和８０年代末发生突变。由于冬、夏季风不同长度的年代际振荡，它们同位相增阶段夏季西太平洋副高位置容易偏北，贵州降水偏少；它们同位相减弱阶段夏季西太平洋副高易偏南，贵州降水偏多；但它们反位相组合时夏季西太平洋副高位置偏北、偏南的机会及贵州降水偏少、偏多几乎均等。

This paper mainly studies the features of vibration between years with different lengths for dry& wet monsoons in east Asia, and its influence to subtropical high pressure in west Pacific Ocean and rainfall in.Guizhou province in summer. The analysis shows that vibration between years with a length of about 30 yearsexists in dry monsoon and water temperature of the equator in east Pacific Ocean and it had sudden change in theend of 1970s, While vibration between years with a length of about 20 years exists in Qinzhang Plateau potentialaltitude of wet monsoon and it had not sudden change in the ends of 1960s and 1980s. When the two vibrationsincrease in same phase period, the location of subtropical high pressure in west Pacific is often in north side insummer, less rainfall is in Guizhou, While they weakens in same phase period, the location is often in southside and more rainfall is in Guizhou. But When they compose in reverse phase period, the location distributionin north or south side high pressure is almost equal and more or less rainfall distribution in Guizhou is also almostequal.