冬半年青藏高原及其附近地区15—25天振荡的传播特征  

PROPAGATION FEATURES OF 15—25 DAY OSCILLATION IN THE QINGHAI-XIZANG PLATEAU DURING WINTER TIME

作　　者：孙照渤[1] 李云康[1] 

机构地区：[1]南京气象学院,南京210035

出　　处：《应用气象学报》1993年第A12期26-30,共5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：利用欧洲中期预报中心客观分析资料,分析了冬半年青藏高原及其附近地区15—25天振荡的传播特征.结果表明,15—25天振荡经阿拉伯海附近向东北传播的过程中,在青藏高原附近加强,再经我国东部和日本,向北太平洋传播并减弱.这种振荡表现出波列的传播特点.另外,还分析了15—25天振荡的垂直结构.The propagation features of the 15—25 day oscillations over the Qinghai—XizangPlateau and its vicinity during winter time is analyzed by using the ECMWF analysis da-ta.It is shown that the wavetrain of 15—25 day oscillations propagates from the Arabi-an Sea to North Pacific via the Qinghai—Xizang Plateau,Yellow Sea and Japan area.The wavetrain is enhanced over the Qinghai—Xizang Plateau and its surrounding duringthe course of propagation,and decreased over North Pacific.The 15—25 day oscillationshave the features of standing wave.Further analysis is then made of the vertical struc-ture of the 15—25 day oscillations.

关 键 词：数字滤波 振荡 传播 大气环流 

分 类 号：P434.1[天文地球—大气科学及气象学]