摘要
采用浙江省常规自动站、MICAPS资料和NCEP/NCAR1.0°×1.0°资料对2010年浙江梅汛期进行分析。结果表明:(1)2010年是浙江近几年来比较典型的梅汛期降水年份,梅雨量较常年偏多,暴雨过程频繁;(2)500 hPa双阻形势的稳定维持,有利于浙江梅汛期的持续性降水,5次强降水过程700hPa、850 hPa都配合中纬度低压槽和切变线;(3)梅雨前期100 hPa南压高压呈西部型,梅雨中期由西部型转为东部型,梅雨后期呈带状型分布,南亚高压与西太平洋副高有着相向而行的移动路径;(4)阿拉伯海和印度的西风气流和西平洋副高南侧的偏东气流为暴雨区提供水汽来源,东路、中路和西路三支冷空气发挥了重要作用,主要雨带位于高空急流的右侧和低空急流的左侧。
Using the conventional meteorological data,MICAPS data and reanalyzed 1.0°×1.0° grid data of NCEP/ NCAR,The circulation characteristic of Meiyu rainstorm in ZheJiang province during 2010 has been analyzed. The main results are as follows： （1） 2010 was relatively typical Meiyu year in recent years,the accumulated rainfall was much more than that in average years, the processes of heavy rain were much more frequent.（2）The double-blocking high type maintained at 500 hPa was useful for long-time rainy day. In the six systematic intense rainstorm processes during the whole Meiyu period, the middle latitude trough and shear line were found at 700 hpa and 850 hpa. （3） The South Asia high at 100 hPa was western type in the prophase of Meiyu period, but it was eastern type in the middle stage. In the later stage, it was zonal type. The South Asia high had opposite path with the Western Pacific subtropical high. （4）The vapor sources of heavy rain area were provided with the west winds coming from Arabian Sea and India, it also provide with the east winds on the south side of the western pacific subtropical high. Three paths including the east, the middle and the west cold airs had played an important role in rainstorm, the heavy rain area was located on the left side of the low-level jet and on the right side of the upper-level jet.
出处
《科技通报》
北大核心
2012年第1期34-38,50,共6页
Bulletin of Science and Technology
基金
浙江省气象灾害强度分县实时排序评估业务建设
浙江省气象局重点科技专项(2008ZD12)
关键词
梅汛期
强降水
环流特征
Meiyu, strong precipitation,circulation characteristic
