【摘要】 应用气象、水文加密观测和NECP再分析资料对两个严重影响湖南的热带气旋圣帕、碧利斯进行了对比分析。分析表明:"碧利斯"和"圣帕"影响期间,湖南降水在强度和范围上存在明显差异,"碧利斯"强降水主要位于低压环流的东南侧,在湘东南地区形成致洪暴雨,而"圣帕"降水范围大,湖南大部分地区出现大暴雨,强降水落区具有自东向西移动的特点,且强降水持续时间更长,强度更强。进一步分析发现,"碧利斯"、"圣帕"登陆后低压环流移动路径不同以及结构的差异,且与之相互作用的南海季风强度不同,导致它们在动力结构、水汽辐合强度分布和垂直运动等方面存在明显差异,而这些差异是造成它们不同的强降水分布特征的重要原因。更多还原

【Abstract】 The comparative analysis between "BIILIS" and "SEPAT" which had a sobering effect to Hunan Province was conducted by using the meteorological and hydrographic conventional intensive observational data and NECP reanalyzed data.Results show that the strength and scope of the precipitation brought from Bilis and Sepat had significant differences.The precipitation of Bilis mainly located in the southeast side of the low pressure circulation and induced the rainstorm in the southeast area of Hunan.The scope of the precipitation of SEPAT was widespread,and the area of heavy precipitation moved from east to west and lasted longer than Bilis.Further analysis found that the differences between Bills and SEPAT in moving route,structures and the South China Sea Monsoon intensity revealed obvious discrepancy in dynamic structure,distribution of moistureconvergence intensity and vertical movement.These differences are the important reasons that caused different distribution of their heavy rainfall.更多还原