干旱区生态环境知识资源中心(Arid): 利用NCEP再分析资料和新一代天气雷达资料对干旱区一次持续阴雪天气的分析研究

Arid

	利用NCEP再分析资料和新一代天气雷达资料对干旱区一次持续阴雪天气的分析研究
其他题名	Study of a Continual Cloudy-snowy Weather in Arid Area Using NCEP Reanalyzed Data and Doppler Radar Data
	纪晓玲 1; 冯建民 1; 陈晓娟 1; 徐阳春 2; 穆建华 1; 赵蔚 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2010
卷号	30 期号:2 页码:432-438
中文摘要	利用NCEP再分析资料和银川新一代天气雷达资料,对2008年元月中下旬宁夏持续阴雪极端天气进行了环流背景及雷达回波特征分析.分析表明:欧洲阻高的建立与崩溃、里海到巴湖切断低压的维持加深与减弱、东亚大槽的稳定维持、副高的偏北偏强及高原东侧西南气流的存在,为宁夏持续阴雪天气提供了有利的环流背景及较好的水汽条件,低层辐合、高层辐散为降雪天气提供了持续的上升运动,而低层高原低值系统的作用,是造成局地大降雪的主要原因.降雪雷达回波强度一般维持在10～25 dBz,超过30 dBz的回波面积小,回波顶比较平整,顶高普遍在4.0～6.0 km,最高达到7.0 km左右,零速度线有时可表现为明显的 "S"型结构;利用Z-I关系进行雷达定量降水估测对降雪有一定的反演能力.
英文摘要	Based on NCEP reanalyzed data and Yinchuan Doppler Radar data, the circulation background and the characteristics of radar echo of a continual cloudy-snowy weather in Ningxia occurred in the second and last ten-day period in January 2008 was analyzed. The result shows that: the formation and collapse of European blocking high, the maintaining and strengthening and weakening of the cut-off low between the Caspian sea and Balkhash Lake, the stability maintaining of trough in East Asia, the north border of subtropical high is northward and stronger than the normal, and the existence of south-west air-flow over the east Qinghai-Tibet plateau, have provided advantageous circulation background and water vapor condition for the continuance of Ningxia cloudy-snowy weather;the low level convergence and high level divergence have provided persistent ascending motion for snowy weather;nevertheless, the low-level Low-Pressure Systems over Tibetan plateau is the main cause of local-scale heavy snow. The echo reflectivity of snow is usually around 10～25 dBz, area of echo with reflectivity over 30 dBz is small, the echo’s top looks smooth and is around 4.0～6.0 km, the max echo top reaches to 7 km, the zero velocity belt sometimes appears as an distinct "S";the Z-I relationship can be used to estimate the snowfall at a certain extent.
中文关键词	持续阴雪 ; 多普勒雷达 ; 定量估测降水 ; 干旱区
英文关键词	cloudy-snowy weather Doppler Weather Radar quantitative estimation precipitation arid area
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:3843048
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225977
作者单位	1.宁夏气象防灾减灾重点实验室, 宁夏气象防灾减灾重点实验室, 银川, 宁夏 750002, 中国; 2.宁夏气象台, 银川, 宁夏 750002, 中国
推荐引用方式 GB/T 7714	纪晓玲,冯建民,陈晓娟,等. 利用NCEP再分析资料和新一代天气雷达资料对干旱区一次持续阴雪天气的分析研究[J],2010,30(2):432-438.
APA	纪晓玲,冯建民,陈晓娟,徐阳春,穆建华,&赵蔚.(2010).利用NCEP再分析资料和新一代天气雷达资料对干旱区一次持续阴雪天气的分析研究.中国沙漠,30(2),432-438.
MLA	纪晓玲,et al."利用NCEP再分析资料和新一代天气雷达资料对干旱区一次持续阴雪天气的分析研究".中国沙漠 30.2(2010):432-438.