干旱区生态环境知识资源中心(Arid): 河西走廊入口区下垫面对沙尘天气影响的模拟研究

Arid

	河西走廊入口区下垫面对沙尘天气影响的模拟研究
其他题名	Influence of Underlying Surface on Dust Weather in the Entrance of the Hexi Corridor
	李丹华; 隆霄; 温晓培; 江颖; 孟晓文
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2017
卷号	37 期号:6 页码:1210-1218
中文摘要	在利用常规观测资料统计分析20002011年和沙尘天气多发年河西走廊入口区代表站点春季风速分布特征的基础上,采用区域气候模式(Regcm4.3.5.6)和欧洲中心更新的4DVar同化的ERA-interim资料,分析了河西走廊入口区下垫面类型改变对2007年4月13日一次沙尘天气过程的影响。结果表明:沙尘暴爆发时,河西走廊为风速大值区,风速8~10m·s~(-1);区域气候模式模拟的沙尘特征量与站点观测的沙尘天气分布对比发现,模拟的沙尘区的发展变化能较好地表征这次沙尘天气过程的变化;河西走廊入口区植被由沙漠改为落叶阔叶林后,发生沙尘天气时该地区风速有所减小,减小平均值为3m·s~(-1),且风速越大,减小越明显。不同粒径沙尘的起沙率和沙尘粒子柱含量对下垫面类型改变的响应有所不同,减小量最大分别达到-50mg·m~(-2)·d~(-1)和-50mg·m~(-2),0.01 ~5.0mum粒径沙尘减小范围和强度相差不大,5.0~20mum粒径沙尘由于粒径最大减小最明显,由于模式中考虑的2.5~5.0mum粒径沙尘在大气中所占比例小,减小量级和范围最弱。改变下垫面类型使得起沙率和沙尘粒子柱含量在沙尘天气最强时刻减少最显著。
英文摘要	Based on the analysis of wind speed distribution characteristics in spring during 2000-2011 and the dust weather years in the entrance of Hexi Corridor by usingmeteorological data.Using Regional climate model (Regcm4.3.5.6)and European Center Update 4DVar assimilated ERA-interim data,we analyzed the influence of the change of vegetation cover in the entrance of Hexi Corridor during a dust weather on April 13,2007.The result shows during the sandstorm outbreak,the Hexi Corridor is a large area of wind speed,and the wind speed is 8-10 m·s~(-1);The dust characteristics of the regional climate model simulation are compared with the dust weather distribution observed by the site,the development of simulated sand dust zone can better describe the change of dust weather process;The surface cover in the entrance area of Hexi corridor is changed from desert to deciduous coniferous forest.When sand dust weather occurs,the wind speed in this area decreases,and the magnitude decreases by an average of 3 m·s~(-1) and it’s obvious for larger wind speed.The influence of surface cover change on different particle sizes is different,and the largest reduction of dust emission rate and column content reaches-50 mg·m~(-2)·d~(-1),-50 mg·m~(-2),and it has similar characters of reduction for 0.01-5.0mum;The reduction of 5.0-20mum is the most obvious due to the largest particle size,the decrement of dust emission rate and burden is significant when the duststorm reached its strongest phase.
中文关键词	沙尘天气 ; 河西走廊 ; 地表覆盖改变 ; 起沙率 ; 沙尘粒子柱含量
英文关键词	dust weather Hexi Corridor surface cover change sand emission rate sand column content
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:6118704
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237159
作者单位	兰州大学大气科学学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	李丹华,隆霄,温晓培,等. 河西走廊入口区下垫面对沙尘天气影响的模拟研究[J]. 兰州大学,2017,37(6):1210-1218.
APA	李丹华,隆霄,温晓培,江颖,&孟晓文.(2017).河西走廊入口区下垫面对沙尘天气影响的模拟研究.中国沙漠,37(6),1210-1218.
MLA	李丹华,et al."河西走廊入口区下垫面对沙尘天气影响的模拟研究".中国沙漠 37.6(2017):1210-1218.