干旱区生态环境知识资源中心(Arid): 甘肃短时强降水天气若干环境参数特征分析

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	甘肃短时强降水天气若干环境参数特征分析
其他题名	Short-time heavy precipitation characteristics of several environmental parameters of Gansu Province
	付双喜 1; 何金梅 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2015
卷号	38 期号:3 页码:469-477
中文摘要	利用甘肃省2005-2013年81个气象站逐时降水量、2012-2013年全省区域站雨量及部分探空资料,分析甘肃省短时强降水天气地域分布及环境参数特征,结果表明∶(1)甘肃省短时强降水天气全省均有出现,但主要出现在河东地区,以庆阳北部和陇南居多。(2)合成T-LogP图上各站低层有暖平流、高层有冷平流;平凉(20∶00)、武都(08∶00、20∶00)温湿曲线呈明显漏斗状。(3)短时强降水出现时,K指数、SI指数、CAPE、CIN、各特殊层的高度、静力稳定度及各层的温度露点差在不同区域均表现出不同的特征。上述结果为短时强降水的短时或短期潜势预报可提供参考。
英文摘要	Based on the hourly precipitation data from 2005 to 2013 of 81 local weather stations,precipitation data of all regional stations and data of four sounding stations(Yuzhong,Hezuo,Wudu,Pingliang)from 2012 to 2013 in Gansu province,we analyzed the short-time severe precipitation spatial distribution and environmental parameters characters. The results show that even though the short-time severe precipitation may occur in the whole area of Gansu province,Hedong region,especially at Longnan area and the north of Qingyang area,is the main heavy-rain area. In arid Hexi area,the rainstorms occur fewer times but usually cause great natural disasters and make heavy losses that we should pay more attention to the severe precipitation forecast. Synthesis T-LogP graph shows that warm advection in lower level and cold advection in higher level at all weather stations. The obviously funnel-shaped temperature-humidity curve on Pingliang(20∶00)and Wudu(08∶00,20∶00)reflect the upside dry and underside wet atmosphere stratification with lower lifting condensation level. There is a positive atmospheric instabilities power areas on all T-LogP except for Pingliang(08∶00)and Hezuo(20∶00). That K≥35 ℃ and SI≤2 ℃ at Pingliang station,K≥40 ℃ and SI≤0 ℃ at Wudu station can be regarded properly as one of the short-time severe local precipitation weather forecast index. When most short-time severe precipitation happens, at the same time CAPE≤500 J·kg~(-1),CIN≤100 J·kg~(-1)(CIN≤200 J·kg~(-1) in Yuzhong station). The altitude of 0 ℃ and -20 ℃ in short-time severe precipitation weather is approximately 1km higher than in hailstorm weather. The K index,SI index,CAPE,CIN and Height,static stability and dew point temperature difference appears various characters at different layers. We believe the above results may be very helpful for forecaster in short-time severe precipitation weather forecasting.
中文关键词	短时强降水 ; T-LogP图 ; 环境参数
英文关键词	short-time heavy precipitation T-LogP environmental parameters
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5446648
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232653
作者单位	1.甘肃省人工影响天气办公室, 兰州, 甘肃 730020, 中国; 2.甘肃省气象服务中心, 兰州, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	付双喜,何金梅. 甘肃短时强降水天气若干环境参数特征分析[J],2015,38(3):469-477.
APA	付双喜,&何金梅.(2015).甘肃短时强降水天气若干环境参数特征分析.干旱区地理,38(3),469-477.
MLA	付双喜,et al."甘肃短时强降水天气若干环境参数特征分析".干旱区地理 38.3(2015):469-477.