Hadley环流强度与中国东部气温的相关分析  

Correlation analysis between Hadley circulation intensity and temperature in the eastern China

作　　者：王玉 黄丽芬[2] 谢建兴 张青[3] 

机构地区：[1]永安市气象局,福建永安366000 [2]福建省气象台,福建福州350001 [3]浙江省气象服务中心,浙江杭州310017

出　　处：《气象与环境学报》2013年第6期49-55,共7页Journal of Meteorology and Environment

基　　金：福建省气象局2010年度青年课题(2010Q07)资助

摘　　要：利用NCEP/NCAR再分析月平均风场资料和国家气候中心提供的中国160个气象站月平均气温资料,选用质量流函数计算方法描述平均经圈环流,以环流中心值大小表征其强度,分析1951—2010年Hadley环流强度趋势变化及其与中国东部气温的关系。结果表明:质量流函数能较好地表征平均经圈环流特征,且环流中心值大小能实际反映环流强度。近60 a来,冬季北半球Hadley环流强度呈线性增强的趋势;夏季南半球Hadley环流强度在20世纪80年代初发生了由减弱趋势转变为显著增强趋势的年代际转折。中国东部大部分地区气温的年代际变化能较好地被Hadley环流强度变化解释,二者呈正相关,但显著相关区域随季节变化有所不同。Based on the mean monthly wind field reanalysis data from the NCEP/NCAR and temperature data at 160 weather stations provided by the national climate center from 1951 to 2010 ,the mass stream function scheme and circulation center value were used to analyze Hadley circulation intensity changes and their relations with tem- perature in the eastern China. The results show that the mean meridian circulation can well be described by the mass stream function, and circulation center value can represent its intensity vividly. The winter Hadley intensity in the northern hemisphere has a linear increasing trend in the past 60 years, while the summer Hadley intensity in the southern hemisphere has a turning point of inter-decadal change from decreasing trend to increasing trend in the early of 1980s. The inter-decadal change of temperature in the eastern China could be explained well by changes of Hadley circulation intensity. Both relationships are positive, while they are different with the change of seasons in the significant correlation areas.

关 键 词：质量流函数 平均经圈环流 气温 

分 类 号：P468[天文地球—大气科学及气象学]