远距离热带低压影响下山东半岛特大暴雨成因分析
DIAGNOSTIC ANALYSIS OF RAINSTORM IN SHANDONG PENINSULA INFLUENCED BY A FAR-AWAY TROPICAL DEPRESSION
-
摘要: 利用实时气象资料、卫星云图和NCEP 1°×1°再分析资料结合湿位涡的诊断分析,对2006年7月27日位于山东半岛沿海的威海市受远距离热带低压影响发生的特大暴雨过程进行了研究。结果表明:整个过程中主要有三个对流云团活动,高低空急流的耦合作用以及高层的强辐散为云团的产生提供了有利的环境流场;强对流天气发生在锋前暖区内,特大暴雨落区与能量锋区有很好对应;低空正涡度分布与暖平流的输送为山东半岛特大暴雨提供了动力和热力条件;对物理量场与湿位涡湿斜压项MPV2的时空演变分析表明,高、低空急流在不同时段所起的作用对雨强的变化起决定作用,MPV2>0区域始终位于低空急流核的前方。Abstract: Based on the observational data as well as data of satellite,NCEP reanalysis and moist potential vortex,the heavy rainfall event that occurred away from the outer cycle of tropical depression No.0605 on July 27,2006 in Shandong Peninsula is analyzed.The results show that there were three severe convective sector and the storm rainfall mainly distributed in the front of a high-energy area.Positive vorticity component of moist potential vorticity show that the rain intensity change was determined by upper and low level jets,the area of MPV2>0 occurred at the front of the low jet cores.distribution and transportation of warm advection in low levels provided dynamic and thermal conditions for the rainstorm.The spatial-temporal evolvements of physical variable fields and MPV2 as the horizontal
-
[1] 陶祖钰,田佰军,黄伟.9216号台风登陆后的不对称结构和暴雨[J].热带气象学报,1994,10(1):69-77. [2] 李志楠,郑新江,赵亚民,等.9608号台风低压外围暴雨中尺度云团的发生发展[J].热带气象学报,2000,16(4):316-326. [3] 雷小途,陈联寿.热带气旋与中纬度环流系统相互作用的研究进展[J].热带气象学报,2001,17(4):452-461. [4] 侯建忠,王川,鲁渊平,等.台风活动与陕西极端暴雨的相关特征分析[J].热带气象学报,2006,22(4):203-208. [5] 梁军,陈联寿,李英,等.影响辽东半岛的热带气旋降水分析[J].热带气象学报,2006,22(2):41-48. [6] 张少林,龚佃利,陈晓红,等.热带气旋远距离暴雨过程的诊断分析[J].气象,2006,32(4):29-33. [7] 张经珍,侯淑梅,张洪卫,等.中低纬系统相互作用对"99.8"大暴雨的影响[J].气象,2000,26(5):5-6. [8] 赵宇,吴增茂,刘诗军,等.由变性台风环流引发的山东特大暴雨天气的位涡场分析[J].热带气象学报,2005,21(1):33-43. [9] 曹钢锋,张善君,朱官忠,等.山东天气分析与预报[M].北京:气象出版社,1988:168. [10] 孟智勇,徐祥德,陈联寿.卫星亮温资料四维同化方案及其对"7.20"武汉特大暴雨的模拟试验[J].大气科学,2002,26(5):663-675. [11] 郑峰.一次热带风暴外围特大暴雨分析[J].气象,2005,31(4):77-80. [12] 吴国雄,蔡雅萍,唐晓婧.湿位涡和倾斜涡度发展[J].气象学报,1995,53(4):387-404.
点击查看大图
计量
- 文章访问数: 933
- HTML全文浏览量: 0
- PDF下载量: 756
- 被引次数: 0