摘要
利用全国720站逐日降水资料和1968~1996年NCEP/NCAR 2.5°×2.5°月平均资料对陕西省1961~2000年发生的暴雨进行统计分析。结果表明,陕西省暴雨具有明显的时空分布特征,40年陕西共发生762个暴雨日,主要集中在7月份;暴雨日分布从陕北向陕南显著增加,每年均有占全省47.4%~78.9%的站发生暴雨;孟加拉湾低槽和副热带高压是影响陕西暴雨发生发展的主要天气系统,阿拉伯海和孟加拉湾为陕西暴雨的发生提供了水汽源。
NCEP 2.5°×2.5° reanalysis data from 1968 to 1996 and the 720 stations daily precipitation data from 1961 to 2000 are used to analyze Shaanxi rainstorm. The results showed that： Shaanxi heavy rain has obvious time and space distribution characteristics, there are 762 heavy rain days in the last 40 years, mainly concentrates in July, the distribution of rainstorm days significant increases from northern to east- ern, it accounts for 47.4% - 78.9% of the heavy rain day every year. The trough which located in the Bay of Bengal and the subtropical high are the main weather system which affected the development of Shaanxi heavy rain, the water vapor source which affected Shaanxi rainstorm come from the Arabian Sea and the Bay of Bengal.
出处
《安徽农业科学》
CAS
2015年第1期143-145,共3页
Journal of Anhui Agricultural Sciences
关键词
陕西
暴雨
暴雨日
气候背景
Shaanxi
Rainstorm
Heavy rain days
Climate background
作者简介
马晓华（1986-），女，陕西宝鸡人，工程师，硕士，从事短期预报及中尺度暴雨数值模拟研究。
