北半球位势高度场的遥相关及其数值试验  

TELECONNECTION PATTERNS OF 500 hPa CIRCULATION AND THEIR GCM NUMERICAL EXPERIMENT

作　　者：章基嘉[1] 叶正青[1] 彭世球[1] 

机构地区：[1]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10-16,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：利用1971—1990年逐旬500hPa 位势高度场格点资料,按 Wallace 等(1981)给出的遥相关型指数公式,计算出北半球5种遥相关型的特征指数.对每一型制作了合成平均图和合成差值图,分析各种遥相关型的特征.然后,利用 OSU—AGCM 加进不同海区的 SST 距平值作为非绝热加热,通过数值试验探讨外源强迫对遥相关形成的作用.Five kinds of teleconnection pattern indexes (TPI) of dekad mean circulation on500hPa level in the Northern Hemisphere are calculated for the period of 1971—1990 byusing the data set from NMC (Beijing).In order to confirm the meaning of TPI,a se-ries of composite difference circulation charts for each season have been calculated.andanalysed.To reveal the periodicity of each TPI,the power spectrum has been calculatedfrom the time series of these indexes.Finally,a series of numerical experiments in termsof OSU—AGCM with anomalous diabatic heating in various tropical regions of both Pa-cific and Atlantic Oceans have been made.

关 键 词：位势高度场 遥相关 数值试验 

分 类 号：P448[天文地球—大气科学及气象学]