干旱区生态环境知识资源中心(Arid): 河套干旱区夏季晴天与阴雨天大气边界层特征对比分析

Arid

	河套干旱区夏季晴天与阴雨天大气边界层特征对比分析
其他题名	Atmospheric boundary layer characteristics of the different weather in summer over Hetao Arid Region
	崔洋 1; 常倬林 2; 王澄海 3; 桑建人 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2016
卷号	39 期号:2 页码:309-316
中文摘要	利用2013年7月1~31日气象站常规、探空观测资料和K/LLX802J型机动式边界层风廓线雷达加密观测试验资料,对河套干旱区夏季典型晴天和阴雨天大气边界层的结构特征进行了对比分析。结果表明:(1)河套干旱区夏季晴天边界层高度一般在1 644.3~3 024.5 m之间,平均为2 309.4 m;阴雨天一般在494.2~2 187.5 m之间,平均为1 457.2 m;该地区夏季晴天最大边界层厚度为3 024.5 m。(2)河套干旱区夏季边界层,晴天位温在700 m以下随高度增加显著增大,递增率平均为0.76 ℃·(100 m)~(-1);阴雨天易在50~1 500 m之间出现多层悬空位温逆温现象,位温随高度递增率平均为0.51 ℃·(100 m)~(-1)。在700 m以下大气位温随高度递增率晴天比阴雨天大,700 m以上则是阴雨天比晴天大。(3)河套干旱区夏季晴天和阴雨天边界层比湿随高度总体上均呈减小趋势;边界层平均比湿晴天为4.88~9.13 g·kg~(-1),阴雨天为6.64~12.35 g·kg~(-1),阴雨天比晴天高;阴雨天在地面到1 500 m之间易出现多层悬空逆湿现象。(4)河套干旱区夏季边界层平均风速晴天为3.0 m·s~(-1),阴雨天为3.85 m·s~(-1);晴天100 m以下近地层风速随高度递增速率平均为1.30 m·s~(-1)·(100 m)~(-1),阴雨天为1.35 m·s~(-1)·(100 m)~(-1)。离地500 m高度以上边界层主要吹偏东风和偏南风,晴天和阴雨天分别易在离地100 m和400 m以下发生风速、风向切变。
英文摘要	Using the daily meteorological data of the ground and sounding observation of 16 stations,and the tenminute observational data of the mobile boundary layer wind profile radar(Airda K/LLX802J)in July 2013 in Ningxia Province,China,the atmospheric boundary layer structural characteristics of the sunny and rainy days in summer at Hetao arid region are analyzed with the statistical methods. The results show as follows:(1)The atmospheric boundary layer height is generally from 1 644.3 to 3 024.5 m in the summer sunny days,with an average of 2 309.4 m. In contrast,it is from 494.2 to 2 187.5 m in the summer rainy days,with an average of 1 457.2 m. The maximum atmospheric boundary layer thickness of Hetao arid region in the summer sunny day is 3 024.5 m, which is 900 m smaller than that of Dunhuang Gobi region.(2)In the summer sunny days,the potential temperature of Hetao arid region increases obviously with the rise of height in the atmospheric boundary layer below 700 m,which average increasing rate is 0.76 ℃·(100 m)~(-1). Meanwhile,the multi-layer temperature inversion frequently occurs in the atmospheric boundary layer from 50 to 1 500 m in the summer rainy days. The average increasing rate of potential temperature with height-rising is 0.51 ℃·(100 m)~(-1) in the summer rainy days. Below the 700 m atmospheric boundary layer,the potential temperature increasing rate of the sunny days is bigger than that of the rainy days. But above the 700 m atmospheric boundary layer,the potential temperature increasing rate of sunny days is smaller than that of the rainy days.(3)The atmospheric boundary layer specific humidity decreases with the rising of height both in the sunny and rainy days in Hetao arid region in summer. The summer boundary layer mean specific humidity of Hetao arid region is generally 4.88-9.13 g·kg~(-1) in the sunny days,and 6.64- 12.35 g·kg~(-1) in the rainy days. At the meantime,it is more prone to appear multi-layer humidity inversion below the 1 500 m atmospheric boundary layers in the summer rainy days.(4)The atmospheric boundary layer average wind speed of Hetao arid region is 3.0 m·s~(-1) in summer sunny days,but 3.85 m·s~(-1) in the summer rainy days. The average wind speed increasing rate of the atmospheric surface layer at the region is 1.30 m·s~(-1)·(100 m)~(-1) with the altitude in summer sunny days,but 1.35 m·s~(-1)·(100 m)~(-1) in summer rainy days. In summer,the atmospheric boundary layer above 500 m mainly prevail the easterly and southerly winds at Hetao arid region. At the same time,the wind speed and direction shear often occurs in the atmospheric boundary layer below 100 m in the summer sunny days,and below 400 m in the summer rainy days. The results of the paper are helpful to reveal and understand the summer atmospheric boundary layer structural characteristics and changes at Hetao arid region,and also have a positive significance to promote the development of the boundary layer parameterization scheme in weather numerical model at Hetao arid area.
中文关键词	河套干旱区 ; 大气边界层 ; 夏季晴天 ; 夏季阴雨天 ; 风廓线雷达
英文关键词	Hetao arid region atmospheric boundary layer summer sunny day summer rainy day wind profile radar
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:5684799
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/2XILL650/234235
作者单位	1.宁夏气候中心, 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; 3.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	崔洋,常倬林,王澄海,等. 河套干旱区夏季晴天与阴雨天大气边界层特征对比分析[J]. 兰州大学,2016,39(2):309-316.
APA	崔洋,常倬林,王澄海,&桑建人.(2016).河套干旱区夏季晴天与阴雨天大气边界层特征对比分析.干旱区地理,39(2),309-316.
MLA	崔洋,et al."河套干旱区夏季晴天与阴雨天大气边界层特征对比分析".干旱区地理 39.2(2016):309-316.