北半球平流层下部气温的准两年周期振荡  

THE QUASI-BIENNIAL OSCILLATION OF TEMPERATURE IN THE LOWER STRATOSPHERE OF THE NORTHERN HEMISPHERE

作　　者：吴洪宝[1] 章基嘉[2] 艾丽坤[1] 

机构地区：[1]南京气象学院气象系,南京210044 [2]中国气象科学研究院,北京100081

出　　处：《应用气象学报》1993年第A12期17-23,共7页Journal of Applied Meteorological Science

基　　金：<长期天气预报理论和方法研究>项目

摘　　要：由分析1966—1985年北半球30hPa 月平均气温资料得出,中纬地区气温准两年周期振荡比低纬地区更清楚,平均周期26.3月,振幅约2.8℃,振荡的峰和谷值都出现在冬季.中纬气温和赤道上空纬向风的准两年振荡之间位相配合密切,中纬气温准两年振荡的峰与赤道上空10hPa 为东风,70hPa 为西风的位相一致,谷则有相反的位相.它们的这种准两年周期振荡是通过平均经圈环流相联系的.强烈的火山喷发能影响气温的准两年周期振荡.Based on the analyses of the data set of the temperature at 30hPa level over theNorthern Hemisphere for the period of 1966—1985,it is found that the QBO of tempera-ture in the lower stratosphere is stronger in middle latitudes than in low latitudes.Themean period is 26.3 months and its amplitude is 2.8℃.All peaks and valleys of theQBO of temperature appeared in the winter.There is a considerable phase relationshipbetween temperature anomalies in middle latitudes and zonal wind over the equator,thepeaks(valleys)of the QBO of temperature anomalies in middle latitudes appear when thezonal wind over the equator is easterly (westerly) at 10 hPa level and westerly(easterly) at 70 hPa level.The QBO of temperature in middle latitudes and zonal windon the equator is associated with QBO of the meridional circulations between middle andlow latitudes.The QBO of temperature can be influenced the by strong volcanic erup-tion.

关 键 词：平流层 气温 准两年振荡 北半球 

分 类 号：P423.1[天文地球—大气科学及气象学]