摘要
利用中国气象局提供的1978—2007年全国753站的逐日降水资料和NCEP/NCAR提供的逐日再分析资料,从区域整体角度讨论并划定了近30年(1978—2007年)江淮流域梅雨的入、出梅时间,并在此基础上研究了梅雨各主要特征量的变化规律。结果表明,近30年江淮地区梅雨的各重要参数均具有显著的年际变化特征;入、出梅时间与梅期长度和梅雨量有密切关系,但入梅时间和出梅时间几乎是独立的;入梅早晚年同期大气环流存在明显的差异,副热带夏季风的强弱和推进快慢对入梅的早晚有重要影响。
Based on the NCEP/NCAR daily reanalysis data during 1978--2007 and the daily precipitation from the China Meteorological Administration, the onset and ending of regional Meiyu over Yangtze-Huaihe River Valley is defined from a regional integration viewpoint. The variation characteristics of the main parameters of Meiyu are studied. Results show that the important parameters associated with Meiyu have features of interannual variations. The onset and ending of regional Meiyu are closely related to the duration and the amount of plum rain. The onset date is independent on the ending date. The contemporaneous general circulation is obviously different between the Meiyu early onset and late onset years. The intensity of subtropical summer monsoon and its advancement speed play an important role in the Meiyu onset.
出处
《热带气象学报》
CSCD
北大核心
2012年第5期749-756,共8页
Journal of Tropical Meteorology
基金
国家科技支撑计划课题(2009BAC51B01)
高校博士点新教师基金课题(20093228120001)
江苏省气象科研基金(KM201207)
上海市气象局局校合作科研项目"副热带季风系统监测诊断技术开发"
江苏省"青蓝工程"共同资助
关键词
江淮梅雨
划分标准
年际变化
大气环流
Meiyu over Yangtze-Huaihe River Valley
determination criterion
interannual change
general circulation
