干旱区生态环境知识资源中心(Arid): 河西走廊西部两次极端暴雨事件水汽特征分析

Arid

	河西走廊西部两次极端暴雨事件水汽特征分析
其他题名	Analysis onWater Vapor Characteristics of Two Extreme Rainstorm Events inWestern Gansu Corridor
	陶健红 1; 孔祥伟 2; 刘新伟 2
来源期刊	高原气象
ISSN	1000-0534
出版年	2016
卷号	35 期号:1 页码:107-117
中文摘要	利用常规观测资料、地面自动站雨量资料和NCEP 1° * 1°再分析资料,应用水汽通量诊断分析、后向轨迹模型等方法分析了2012年6月4-5日(简称0605)和2011年6月15-16日(0616)河西走廊西部干旱区两次极端暴雨事件的水汽输送和收支特征。结果表明,高原低涡及其前部弱高压脊共同作用下,在甘肃中西部对流层中层形成的异常偏东气流是河西走廊西部暴雨水汽输送的关键,其将来自孟加拉湾的水汽接力式的输送到河西走廊西部,有利于该地区的水汽辐合;弱高压脊的强度和位置决定了异常偏东气流的强度和最西端延伸的位置,而异常偏东气流的强度和最西端延伸的位置在很大程度上又决定了暴雨水汽的主要来源;两次暴雨过程均存在两路异常的水汽输送,随西风气流的西路水汽输送和绕高原的东路水汽输送,0605过程弱高压脊位置偏东偏弱,异常偏东气流由东向西扩展,最西端达到张掖,较强的西路水汽输送贡献率达到了90.02%,而0616过程弱高压脊位置偏西偏强且在内蒙古西部形成闭合的反气旋环流,异常偏东气流由西向东扩展,最西端位于酒泉西部,较强的东路水汽输送贡献率达到了84.6%;西(东)路水汽输送在对流层低(中)层输入较为显著。
英文摘要	Based on observation and NCEP reanalysis data,using the water vapor flux diagnostic analysis and HYSPLIT model,the water vapor characteristics of two extreme rainstorm events which occurred on 4 5 June 2012 and 15 16 June 2011 in the Western Gansu Corridor arid zone were studied. The results are as follow: The abnormal easterlies in middle troposphere over the central and Western Gansu province resulting from the plateau low vortex and the weak ridge,which is the key of water vapor transport for rainstorm in the Western Gansu Corridor. This abnormal easterlies can transport the water vapor from the bay of Bengal to the western Gansu Corridor in the baton-form,causing water vapor convergence in the region. The intensity and location of weak ridge determine the intensity and location of abnormal easterlies which determine the main water vapor source of rainstorm. Two abnormal water vapor transportation path which included west path and east around the plateau path existed in the two extreme rainstorm events. The intensity and location of weak ridge in the0605 process were weak and eastward shift,and the abnormal easterlies expanded from east to west until it reached Zhangye. Moreover,the west path contributed 90.02% in the total water transport. However,the intensity and location of weak ridge in the0616process were strong and westward shift,forming the anticyclone circulation in western Inner Mongolia,and the abnormal easterlies expanded from west to east,until it reached Jiuquan. The east path contributed 84.6% in the total water vapor transport. Therefore,the west(east)path in the lower(middle) troposphere is more significant.
中文关键词	河西走廊西部极端暴雨 ; 异常偏东气流 ; 水汽输送 ; 水汽收支 ; HYSPLIT轨迹模式
英文关键词	Extreme rainstorm events in Western Gansu Corridor Abnormal easterlies Water vapor transport Water vapor budget HYSPLIT model
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:5660729
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234401
作者单位	1.甘肃省气象局, 兰州, 甘肃 730020, 中国; 2.兰州中心气象台, 兰州, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	陶健红,孔祥伟,刘新伟. 河西走廊西部两次极端暴雨事件水汽特征分析[J],2016,35(1):107-117.
APA	陶健红,孔祥伟,&刘新伟.(2016).河西走廊西部两次极端暴雨事件水汽特征分析.高原气象,35(1),107-117.
MLA	陶健红,et al."河西走廊西部两次极端暴雨事件水汽特征分析".高原气象 35.1(2016):107-117.