台风活动与陕西极端暴雨的相关特征分析
ACTIVITY OF TYPHOONS AND EXTREME RAINSTORMS IN SHANXI PROVINCE
-
摘要: 利用1970~2003年35年间出现在陕西的极端暴雨与近海台风活动的资料,对其进行时空分布统计分析和天气学、动力学诊断以及卫星云图等综合分析,结果表明:两者的相关率接近87%;7、8两个月台风影响最为显著。与华北、东北地区比较,陕西的极端暴雨以远距离影响的台风活动为主。影响台风有两类,一类是台风在台湾岛附近登陆或以北海域活动的,其水汽、能量主要以850hPa层输送尤为明显,这类台风云系与暴雨区之间的晴空区明显。另一类是台风在海南、广东或广西一带登陆或移动,该类水汽、能量主要以700hPa层输送最为显著。当台风在125°E以西,且在13~33°N的范围内活动时,该类台风活动对陕西的强降水作用明显,是造成陕西极端暴雨的一个重要的因素。300hPa高空急流的先兆性对陕西极端暴雨具有一定的预报意义。影响台风的位置与影响云系对极端暴雨落区预报有帮助。Abstract: Based on the data of extreme rainstorms in Shanxi and near-coast typhoon movements in the past 35 years from 1970 to 2003,analyzing the time-space distribution statistics,synoptic meteorology,dynamical diagnosis and cloud image feature,this paper indicates that: the correlation rate is close to 87% and the typhoon influence is most obvious in July and August.Compared to north and northeast China,extreme rainstorms in Shanxi are pivotally influenced by long-distance typhoon movements.There are two kinds of typhoons influencing the rainstorm in Shanxi Province.One makes landfall on or moves around the island of Taiwan which transports large amount of vapor and energy at 850 hPa,and the cloud image between the two regions is featured by cloudless sky.The other is near or makes landfall on Hainan island,Guangdong province or Guangxi province,transporting large amount of vapor and energy at 700 hPa,especially when typhoon is active to the west of 125 °E and within 13~33 °N.This kind of typhoon plays an important role in the rainstorm in Shanxi Province.300-hPa-high jets are of some indication in forecasting extreme rainstorm weather.The cloud image and typhoon's activity are also precursory to the forecasting of extreme rainstorm weather when using the rule and characteristics.
-
Key words:
- Typhoon activity /
- Shanxi province /
- Severe rainstorm /
- correlation analysis
-
[1] 陶诗言.中国之暴雨[M].北京:科学出版社,1980:121-133. [2] 王继志.近百年西北太平洋台风活动[M].北京:海洋出版社,1991:25-100. [3] 蒋尚城.中低纬度系统的相互作用和大范围暴雨[C]//北方天气文集.北京:北京大学出版社,1983:1-10. [4] 卓嘎,谢金南,马镜娴.登陆台风与我国降水的统计关系[J].高原气象,2000,19(2):260-264. [5] 侯建忠.台风与陕西区域性暴雨的关系与环流特征[J].陕西气象,1997(2):5-8. [6] 郁淑华,何光碧,滕家谟.台风对四川盆地西部突发性暴雨影响的数值试验[C]//第10届全国热带气旋科学讨论会论文摘要文集.浙江杭州,1996:176-177. [7] 李江南,王安宇,杨兆礼,等.台风暴雨的研究进展[J].热带气象学报.2003,19(增刊):152-159. [8] 丁治英,张兴强,何金海,等.非纬向高空急流与台风远距中尺度暴雨的研究[J].热带气象学报,2001,17(2):144-145. [9] 杨引明,郑永光,陶祖钰,等.上海热带低压特大暴雨分析[J].热带气象学报,2003,19(4):413-458. [10] 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. [11] 蒋尚城.远距离台风影响西风带特大暴雨的过程模式[J].气象学报,1983,41(2):147-158. [12] 江敦春,党人庆,朱志宏,等.台风暴雨中尺度系统与结构的数值研究[J].热带气象学报,1997,13(2):168-172. [13] 蒋尚城,谢安,谢义炳,等.西太平洋台风与北方暴雨[C]//北方灾害性天气文集.北京:气象出版社,1981:6-10. [14] 蒋尚城,林楠.85年9号台风与辽宁特大暴雨的卫星云图分析[J].北京大学学报(自然科学版),1988,24(3):351-362. [15] 郑秀雅,张廷治,白人海,等.东北暴雨[M].北京:气象出版社,1992:10-152. [16] 《华北暴雨》编写组.华北暴雨[M].北京:气象出版社,1992:10-130. [17] 侯建忠,张弘,杜继稳,等.台风与高原东北侧冷锋暴雨的环境场及云图特征[C]//青藏高原东北侧突发性暴雨分析研究与应用.北京:气象出版社,2005:92-98.
点击查看大图
计量
- 文章访问数: 962
- HTML全文浏览量: 0
- PDF下载量: 1202
- 被引次数: 0