Authors: YaMin Hu YiHui Ding
Publish Date: 2010/04/21
Volume: 55, Issue: 11, Pages: 1077-1083
Abstract
By using BCC RegCM 10 RegCM for short from Beijing Climate Center BCC China Meteorological Administration CMA the Meiyu season characters over the YangtzeHuaihe region during 1991–2005 are simulated The major conclusions of this study may be summarized as the following 1 RegCM can reproduce the interannual variation and the spatial distribution of the summertime precipitation and temperature in the YangtzeHuaihe region 2 By use of a generalized Meiyu criterion and in accordance with modelcalculated precipitation and temperature the Meiyu onset and ending date have been determined Compared with the observation RegCM can simulate the interannual variation of the YangtzeHuaihe Meiyu with preferable capability for most of the normal Meiyu years such as 1995 1997 2000 2001 2002 and 2004 especially for the rich Meiyu years of 1996 1998 and 1999 3 In terms of the average simulation for the recent 15 years the timings of onset and ending of Meiyu occur on June 1 and July 13 respectively which are earlier than the climatological observation For duration Meiyu persists for 32 d 3 d shorter than the observation The index of Meiyu intensity is 245 while the climatological one is 300 Therefore RegCM is capable of simulating the climatological Meiyu duration and intensity while the capability of simulating the onset and ending date of Meiyu still needs to be improved
Keywords: