Wintertime Cyclone Activity and Its Relation to Precipitation over China  

作　　者：CHEN Lei TAN Ben-Kui Nils Gunnar KVAMSTΦ Ola M. JOHANNESSEN 

机构地区：[1]Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University [2]Geophysical Institute, University of Bergen and the Bjerknes Centre for Climate Research [3]Nansen Environmental and Remote Sensing Center [4]Nansen-Zhu International Research Centre,Institute of Atmospheric Physics, Chinese Academy of Sciences [5]Nansen Scientific Society

出　　处：《Atmospheric and Oceanic Science Letters》2013年第5期387-393,共7页大气和海洋科学快报（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2010CB428606);the Chinese Natural Science Foundation Key Project(Grant No.41130962);the Nansen Scientific Society

摘　　要：The authors examined the variability in wintertime cyclone activity and storm tracks and their relation to precipitation over China for the period 1951-2006 using the observational data.Two apparent modes of variability were assumed for the cyclone activity and storm tracks.The first mode describes the oscillation in the strength of the storm tracks in East Asia,which significantly increased since the mid-1980s,whereas the second mode describes a seesaw oscillation in the storm track strength between the Central-Southeast China and northem East Asia.The storm tracks over the Central-Southeast China have increased since the late 1960s.The possible causes for the variation of the cyclone activity and storm tracks are also explored.It is shown that wintertime precipitation,which has increased since the mid-1980s,concentrates in Central-Southeast China.The enhancement may be caused by the first mode of variability of storm tracks,whereas the interannual variability of precipitation may be linked to the second mode of the storm track variability.The authors examined the variability in wintertime cyclone activity and storm tracks and their relation to precipitation over China for the period 1951–2006 using the observational data.Two apparent modes of variability were assumed for the cyclone activity and storm tracks.The first mode describes the oscillation in the strength of the storm tracks in East Asia,which significantly increased since the mid-1980s,whereas the second mode describes a seesaw oscillation in the storm track strength between the Central-Southeast China and northern East Asia.The storm tracks over the Central-Southeast China have increased since the late 1960s.The possible causes for the variation of the cyclone activity and storm tracks are also explored.It is shown that wintertime precipitation,which has increased since the mid-1980s,concentrates in Central-Southeast China.The enhancement may be caused by the first mode of variability of storm tracks,whereas the interannual variability of precipitation may be linked to the second mode of the storm track variability.

关 键 词：CYCLONES PRECIPITATION winter East Asia monsoon 

分 类 号：P426.615[天文地球—大气科学及气象学]