干旱区生态环境知识资源中心(Arid): 西北干旱区夏季大气边界层逆温强度和高度的频率密度研究

Arid

	西北干旱区夏季大气边界层逆温强度和高度的频率密度研究
其他题名	Studies on Frequency Density of Inversion Intensity and Height of Atmospheric Boundary Layer in Arid Region of Northwest China
	赵建华; 张强; 王胜; 段海霞
来源期刊	高原气象
ISSN	1000-0534
出版年	2013
卷号	32 期号:2 页码:377-386
中文摘要	利用敦煌干旱区陆气相互作用外场加强观测试验数据,分析了夏季干旱区边界层高度、逆温层逆温强度以及频率密度的特征。结果表明,虚位温垂直变化的极值可以确定对流边界层(CBL)、稳定边界层(SBL)和残留层顶(RLT)的高度。夏季敦煌干旱区CBL、SBL和RLT的高度平均为2.09km、594m和3.53km,三者逆温层强度(Deltatheta_(v,zi))平均为0.084~0.088K.(10m)~(-1)。CBL高度基本遵从均匀分布,SBL和RLT高度分别遵从显著的伽玛分布和极值分布,三者的Deltatheta_(v,zi)均遵从显著的伽玛分布。CBL高度与Deltatheta_(v,zi)的联合频率密度在0.05≤Deltatheta_(v,zi)≤0.1K.(10m)~(-1)的线状区域中最大,SBL高度与Deltathetav,zi的联合频率密度在SBL高度<1km、Deltatheta_(v,zi)=0.1K.(10m)~(-1)和0.025K.(10m)~(-1)附近的两区域中较大,RLT高度与Deltatheta_(v,zi)的联合频率密度则在RLT高度等于3.5km附近且Deltatheta_(v,zi)=0.11或Deltatheta_(v,zi)=0.06~0.08K.(10m)~(-1)的区域中较大。
英文摘要	The height of the (CBL) in arid region was found to access 4 km in summer. Based on the intensified observational data for land-atmosphere interaction field experiment performed in a typical arid region, namely Dunhuang, Gansu Province, the characteristics of the atmospheric boundary, the inversion-layer intensity and its frequency density in arid region of Northwest China are studied using the statistical methods. The extreme value of vertical change of virtual potential temperature is used to determine the heights of convective boundary layer (CBL), stable boundary layer(SBL) and the top of residual layer(RLT). The results show that the averaged heights of CBL, SBL and RLT are 2.09 km, 594 m and 3.53 km, respectively, and their intensities (Deltatheta_(v, zi)) of inversion layers present obvious diurnal variations that is in 0.084~0.088 K (10 m)~(-1)on average. The heights of SBL and RLT satisfy very significant Gamma distribution and extreme-value distribution, respectively, both with maximal frequencies are located separately below 1 km height and near 3.8 km height while the height of CBL shows a uniform distribution in the range of 0~4 km on the whole. All of the Deltatheta_(v, zi) of three obeys significant Gamma distribution. Joint frequent densities of the height and the Deltatheta_(v, zi) demonstrate that CBL tends to have Deltatheta_(v, zi) within [0.025, 0.1] K·(10 m)~(-1) regardless of how much CBL height is, SBL tends to have its height less than 1 km and its Deltatheta_(v, zi) neighboring on 0.1 K·(10 m)~(-1) and 0.025 K·(10 m)~(-1), and RLT tends to have its heights in the vicinity of 3.5 km and its Deltatheta_(v, zi) equal to 0.1 or 0.06~0.08 K·(10 m)~(-1).
中文关键词	大气边界层 ; 逆温强度 ; 频率密度 ; 西北干旱区
英文关键词	Atmospheric boundary layer Intensity of inversion layer Frequency density Arid area of Northwest China
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:4825735
来源机构	中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229681
作者单位	中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾开放实验室, 兰州, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	赵建华,张强,王胜,等. 西北干旱区夏季大气边界层逆温强度和高度的频率密度研究[J]. 中国气象局兰州干旱气象研究所,2013,32(2):377-386.
APA	赵建华,张强,王胜,&段海霞.(2013).西北干旱区夏季大气边界层逆温强度和高度的频率密度研究.高原气象,32(2),377-386.
MLA	赵建华,et al."西北干旱区夏季大气边界层逆温强度和高度的频率密度研究".高原气象 32.2(2013):377-386.