摘要
利用NCEP/NCAR月平均再分析资料和571站逐日降水资料,探讨了高原夏季风对中国夏季极端降水的影响机制。结果表明:(1)高原夏季风强(弱),东北、黄河河套、华南和四川西部地区夏季极端降水偏少(多),长江流域、南疆、青藏高原东侧边缘地区夏季极端降水偏多(少)。(2)中国东部从北向南呈现出明显纬向带状的"-+-"遥相关型相关分布。(3)中高层环流系统特征、中低层风场特征、水汽输送特征和湿位涡特征是高原夏季风对夏季极端降水影响的物理机制。
By using NCEP/NCAR monthly reanalysis data and the daily precipitation data of 571 stations, the in- fluence mechanism of the plateau summer monsoon for the extreme precipitation in the summer of China are ana- lyzed. The results show that： （ 1 ） In the strong （weak） index years of plateau summer monsoon, it had little （ a lot of） extreme precipitation in Northeast China, Yellow River, South China and the western region of Sichuan in summer, however it had a lot of（little） extreme precipitation in Yangtze River basin, the southern Xinjiang, the eastern edge of Qinghai-Tibetan Plateau region in summer. （2） It showed obvious zonal bands＂ - ＋ -＂ tele- connection pattern correlation distribution from north to south in the east of China. （3）The atmospheric circula- tion system characteristic of middle and high layer, the wind field characteristic of middle and low layer, the wa- ter vapor transport characteristic and the moist potential vorticity characteristic are considered influence physical mechanisms of the plateau summer monsoon for the extreme precipitation in the summer.
出处
《高原气象》
CSCD
北大核心
2018年第1期1-12,共12页
Plateau Meteorology
基金
国家自然科学基金项目(91537214,41275079,41305077,41405069,41505078)
中国民用航空飞行学院重点项目(ZJ2014-02,ZJ2016-02)
中国民用航空飞行学院青年基金项目(Q2018-119)
成都信息工程大学科研项目(J201516,J201518)
关键词
高原季风
极端降水
相关分析
机制
Plateau monsoon
extreme precipitation
related analysis
mechanism
