[1]周万福,肖宏斌,孙安平,等.祁连地形云与垂直风的关系[J].山地学报,2012,(06):641.
　ZHOU Wanfu,XIAO Hongbin,SUN Anping,et al.The Relation between Orographic Cloud and 　Vertical Wind in Qilian[J].Mountain Research,2012,(06):641.
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祁连地形云与垂直风的关系()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2012年06期
页码:
641
栏目:
山地学报
出版日期:
2012-01-01

文章信息/Info

Title:
The Relation between Orographic Cloud and 　Vertical Wind in Qilian
作者:
周万福;肖宏斌;孙安平;张国庆;校瑞香;
1.青海省气象科学研究所，西宁 青海810001；
2.青海省气象局，西宁 青海810001
Author(s):
ZHOU Wanfu; XIAO Hongbin; SUN Anping; ZHANG Guoqing; XIAO Ruixiang
1.Meteorological Institute of Qinghai Province，Xining 810001，China； 　　
2.Qinghai Province Weather Modification Office，Xining 81000，China
关键词:
祁连山; 三轴风速仪; 地形云
Keywords:
Qilian mountain; UVW anemometer; orographic cloud
分类号:
P463
文献标志码:
A
摘要:
利用2007-07-12至2007-08-19的地面观测资料和三轴风速仪资料,对祁连地形云的形成与垂直风速之间的关系进行了分析。按照地形云形成的天气背景,将其分为5类过程进行了分析,结果表明:降水量和低云量以及气层的抬升(三轴风垂直分量W)有着密切的关系。当该地区主导风向为西南风时,W为正值(气层抬升),低云量增加,此时有降水或降水强度较大;该地区主导风向为东北风时,W为负值(气层下降),低云量减少,此时无降水或降水强度较小;多数情况下,降水发生在主导风向为西南风时,降水时间与W开始抬升时刻相差1～2 h。另外,湍流强度的垂直分量变化也与降水有很明显的关系。一般情况下,湍流强度的垂直分量比较大...
Abstract:
Using UVW anemometer and surface observation data on July to August in 2007, analyzed the relation between formation of orographic cloud and vertical wind in south of Qilian Mountain region. According to the reason of formation of orographic cloud, we classified the weather background to be five types. The result showed: there are a nearly relation among the precipitation and low clouds amount and air current lifting (W: vertical component of UVW anemometer). While the W is positive value(air current ascending), the dominating wind is southwest wind and low clouds amount is increased. Whereas the W is negative (air current descending), the dominating wind is northeast wind and low clouds amount is decreasing. A great number of precipitation occurred in period of time that dominating wind is southwest wind and W is positive value. In most cases, there are 1 to 2 hours between rainfall time and the original ascending time of W. In addition，there are an obvious relation between the variation of turbulence intensity and precipitation. Usually there are more low clouds amount and precipitation while the W was larger. Contrary, there are less low clouds amount and precipitation while the W was smaller. The time that was rainfall or later 1 to 2 hours rainfall, the W was larger U and V. The reason of this precipitation maybe happened low clouds or high clouds which formed by orographic cloud.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2012-05-25；改回日期(Accepted) : 2012-07-25。
基金项目（Foundation item）：国家自然科学基金重大项目《西北地形云结构及生长机理研究》资助。\[Supply by Natural Science Foundation of major projects“Research of Northwest Landscape Structure and Growth Mechanism of Cloud”．\]
作者简介（Biography）：周万福（1976-），男，青海西宁人，硕士，高级工程师，主要从事大气物理与大气探测工作。\[Zhou Wanfu(1976-)，male, senior engineer, master，major in atmospheric physics.\]E-mail：zhouwanfu@sina.com
更新日期/Last Update: 1900-01-01