Hadley环流强度与中国东部气温的相关分析

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个气象站的月平均气温资料，选用质量流函数计算方法描述平均经圈环流，用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形象地反映环流强度。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很好地被Hadley环流强度变化解释，二者呈正相关关系，但显著相关区域随季节变化有所不同。

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

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.