大气科学2013，Vol.37Issue(4)：881-890,10.DOI:10.3878/j.issn.1006-9895.2012.12072
东亚副热带急流的空间结构及其与中国冬季气温的关系
Spatial Structure of East Asia Subtropical Jet Stream and Its Relation with Winter Air Temperature in China
摘要
Abstract
The spatial structure of the East Asia jet (EAJ) and its relation to the winter temperature in China is analyzed by using NCEP/NCAR monthly reanalysis data from 1950 to 2012 and daily air temperature data from 542 station in China.The results show that the subtropical jet is divided into tubular and irregular structures.The jet's volume becomes largest in winter,and its vertical thickness ranges from 500 hPa to 100 hPa.In summer,the jet was just visible at 200 hPa,and its volume was smallest.The jet tube runs from southwest to northeast in autumn,winter,and spring but from west to east in summer.The meridional movement of the mean axes,which represents the greatest wind speed from 500 hPa to 100 hPa,is not synchronous.The wind axes at low levels are always north of the high ones in spring and autumn.The vertical motions below each part of the EAJ differ and vary seasonally.In addition,the strength of the winter EAJ,especially the middle part,is correlated with the winter temperature in China.When the middle part of the EAJ is strong,the winter temperature in most parts of China might be low.关键词
东亚副热带急流/空间结构/中国冬季气温Key words
East Asia subtropical jet/ Spatial structure/ Winter temperature in China分类
天文与地球科学引用本文复制引用
姚慧茹,李栋梁..东亚副热带急流的空间结构及其与中国冬季气温的关系[J].大气科学,2013,37(4):881-890,10.基金项目
国家重点基础研究发展计划(973计划)项目2013CB956004,2011年度高等学校博士学科点专项科研基金资助课题(博导类)20113228110003,公益性行业(气象)科研专项GYHY201006038,国家科技支撑计划项目2009BAC51B02,江苏高校优势学科建设工程资助项目PAPD （973计划）
