干旱区生态环境知识资源中心(Arid): 干旱区绿洲风环流观测

Arid

	干旱区绿洲风环流观测
其他题名	Observation Study on Wind Circulation over an Arid Oasis in Northwest China
	文莉娟; 吕世华; 陈世强; 奥银焕; 李锁锁; 鲍艳
ISSN	1001-4675
出版年	2007
卷号	24 期号:6 页码:735-740
中文摘要	利用2003年在甘肃省酒泉地区金塔绿洲开展的"绿洲系统能量和水分循环试验"获得的自动站点和系留探空资料,证实了绿洲风环流的存在.观测结果显示:夏季白天在一定高度内绿洲相对于荒漠温度较低,气压较高;随荒漠绿洲热力差异增大,低层将产生由绿洲向四周荒漠辐散的风场,绿洲上的垂直运动以下沉气流为主,探测高度内的荒漠风向也相应地转变为来自绿洲,而同期绿洲探测高度内的风向较为凌乱.尽管观测表明绿洲风确实存在,但在有些时段背景风速较大,由地表热力非均匀激发的局地绿洲风将被大尺度环流掩盖.
英文摘要	Air temperature increase at daytime and its decrease at night over desert are rapider than that over oasis.In this study,the existence of oasis wind circulation is confirmed using the data observed by the automatic weather stations and tethered balloon sounding systems in the "Experiment of Oasis System Energy and Water Cycle" carried out in the Jinta Oasis,Jiuquan Prefecture,Gansu Province in 2003.The observed data reveal that the temperature is lower and the pressure is higher over the oasis than that over the desert within a certain height at daytime in summer.With the increase of thermal difference between the oasis and desert,a low-level wind field diverging from the oasis to the surrounding deserts occurs,the vertical velocity over the oasis is dominated by downward air current,the wind direction within the sounding height over the deserts is accordingly changed to that blowing from the oasis to the deserts,but the wind direction within the sounding height over the oasis is changeable.Although there is an oasis wind circulation,the local oasis breeze induced by surface thermal heterogeneity is concealed by the large-scale circulation because of the high background wind speed sometimes.
中文关键词	绿洲风 ; 局地环流 ; 热力非均匀 ; 荒漠 ; 金塔绿洲 ; 甘肃
英文关键词	oasis breeze local circulation thermal heterogeneity Jinta Oasis Gansu Province
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:3003740
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221008
作者单位	中国科学院寒区旱区环境与工程研究所, 甘肃省干旱气候变化与减灾重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	文莉娟,吕世华,陈世强,等. 干旱区绿洲风环流观测[J]. 中国科学院西北生态环境资源研究院,2007,24(6):735-740.
APA	文莉娟,吕世华,陈世强,奥银焕,李锁锁,&鲍艳.(2007).干旱区绿洲风环流观测.,24(6),735-740.
MLA	文莉娟,et al."干旱区绿洲风环流观测".24.6(2007):735-740.