玉林6月份降水异常及其环流形势分析-气象研究与应用

文章信息/Info

Title:: Analysis on precipitation anomalies in June and the circulation characteristic in Yulin

Author(s):: Chen Ming-lu¹; 2; Zhi Hai¹; 1. Nanjing Information Engineering University, Nanjing Jiangsu 210044;
2. Yulin Municipal Meteorological Service, Yulin Guangxi 537000

摘要:: 利用1961~2013年玉林地区五个台站6月份降水资料及NCEP/NCAR月平均再分析资料,分析了玉林地区6月降水的异常及其环流形势特征。结果表明:玉林地区6月降水年际变化明显,总的降水趋势变化不明显;降水异常偏多年,南亚高压和西太平洋副高都偏弱,500hPa垂直运动偏强,高层辐散和低层辐合增强,低层水汽通量辐合增强,都有利于降水的发生;少雨年则相反。

Abstract:: Based on the precipitation data of five stations in Yulin from 1961 to 2013 in June and NCEP/NCAR monthly average reanalysis data, the precipitation anomaly and its circulation characteristics of Yulin in June were analyzed. The results show that the precipitation interannual variability in June of Yulin is obvious, while a general trend of precipitation change is not obvious; In rainfall years, both of South Asia high pressure and the western Pacific subtropical high are weak, partial vertical 500 hpa movement is strong, high-level divergence and low-level convergence and low-level moisture flux convergence become stronger, which are conducive to the occurrence of precipitation; but in little rain, the circulation characteristic is opposite.