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《Journal of Chengdu University of Information Technology》 2010-06
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The influence of the Activities in Atmospheric Circulation at the Southern Hemisphere on the Precipition Water in YunNan Area in Flood Season

LI Zi-yi1,2,YAN Hua-sheng1,LI Gou-ping2(1.School of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China;2.Department of Atmospheric Sciences,University of Yunnan,Kunming 650091,China)  
124 precipitation station data of Yunnan in June-August at 1948-2006 years and monthly re-analysis data from NCEP/NCAR was adopted to figure out the average precipitation materials of Yunnan in the 46 years and the annual mean of 100hPa and 500hPa potential height in Jan-May at 1948-2006 years.After doing decomposing by EOF on the average precipitation data of Yunnan monthly,make a relevant analysis with first main weight field and the Southern Hemisphere 100hPa and 500hPa high field data.It is 95% that the significance is correlated with examining,and the works was done to find out several significant factors which have prominent connection with precipitation materials of Yunnan at Southern Hemisphere in JJA.The result indicates that there is a prominent influence between the atmospheric circulation in Southern Hemisphere and the precipitation water of Yunnan in flood season,and these factors move from the South Pole of January to the low latitude or the west wind belt of the Southern Hemisphere month by month;One obvious conversely change characteristic which like the seesaw between the Antarctic Zone land and the middle latitudes was found in April and May.
【Fund】: 国家自然科学基金资助项目(41075072)
【CateGory Index】: P461
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