The NCEP/NCAR global monthly reanalysis data and the observed precipitation data at 17 stations in the northeastern part of Qinghai-Xizang Plateau about 40 years(1958~1997) are used in this paper.Based on the selected three severe drought years(1962,1995,1997) and three rainy years(1967,1984,1985) in early summer,the 500 hPa potential height fields,u,v vector fields,vorticity fields and the divergence fields over East Asia in early summer are analyzed respectively.The results show that the drought and rainy years in the northeastern part of Qinghai-Xizang Plateau in early summer are related to the circulation patterns at the middle and high latitudes,the differences of physical factors are obviously distinct.
俞亚勋;谢金南;王宝灵.
AN ANALYSIS OF THE 500 HPA CIRCULATION PATTERNS FOR DROUGHT AND RAINY YEARS OF EARLY SUMMER IN THE NORTHEASTERN PART OF QINGHAI-XIZANG PLATEAU. Plateau Meteorology. 2000, 19(1): 43-51