干旱区生态环境知识资源中心(Arid): 西北半干旱区激光雷达探测卷云几何特征和光学厚度

Arid

	西北半干旱区激光雷达探测卷云几何特征和光学厚度
其他题名	Lidar observations of spatial and temporal variations of cirrus clouds over semi-arid areas in Northwest
	王瑾; 张镭; 王宏斌; 刘瑞金; 周碧; 黄忠伟; 闭建荣; 张北斗; 张武
来源期刊	量子电子学报
ISSN	1007-5461
出版年	2013
卷号	30 期号:1 页码:66-72
中文摘要	为了研究中国西北半干旱区卷云几何特征和光学特性的时空分布特征,我们利用兰州大学半干旱气候与环境观测站(SACOL,35.95°N,104.14°E)的微脉冲激光雷达(MPL-4B)探测卷云过程,分析讨论了卷云的结构、光学性质及其时间变化特征,结果表明,卷云高度分布范围为7-10km,卷云经历了薄-厚-薄的过程,平均厚度为2.00.5km。卷云环境温度在-51~-39℃范围之内。卷云的光学厚度在0.084-1.649之间,光学厚度随几何厚度的增加而增大,平均光学厚度为0.6510.403。多次散射效应对光学厚度大于0.3的卷云影响较大。卷云激光雷达比为1717sr。薄卷云的激光雷达比要比厚卷云的大。光学厚度小于0.3的光学薄卷云出现高度在8.6km以上,环境温度低于-45℃,几何厚度小于1.5km,雷达比分布在5-69 sr。
英文摘要	In order to understand the spatial and temporal variations of cirrus over semi-arid areas in northwest of China, macrophysical and optical characteristics of cirrus clouds were observed by Micro Pulse Lidar (MPL-4B) over Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL, 35.95°N, 104.14°E). The structures and optical properties of the cirrus clouds as well as their spatial and temporal variations are discussed and analyzed. Our results show that cirrus clouds change from thin to thick, observed ranging from 7 to 10km, with a mean thickness of 2.00.5km. During this period, the samples have temperature between -51 and -39℃. The cloud optical depth increases and then decreases with increasing geometrical depth, ranging from 0.084 to 1.649, with a mean value of 0.6510.403. Lidar ratio of cirrus clouds is 1717sr and we have found that lidar ratio of optically thin cirrus is more than that of thick cirrus. Thin cirrus clouds with ambient temperature below -45℃ occurr above 8.6km and its thickness is lower than 1.5km. The lidar ratio of thin cirrus is between 5 and 69sr.
中文关键词	遥感 ; 几何和光学特征 ; 透过率法 ; 卷云
英文关键词	remote sensing geometrical and optical properties transmittance method cirrus clouds
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENGINEERING ELECTRICAL ELECTRONIC
WOS研究方向	Engineering
CSCD记录号	CSCD:4753012
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/2XILL650/229841
作者单位	兰州大学大气科学学院, 半干旱气候变化教育部重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	王瑾,张镭,王宏斌,等. 西北半干旱区激光雷达探测卷云几何特征和光学厚度[J]. 兰州大学,2013,30(1):66-72.
APA	王瑾.,张镭.,王宏斌.,刘瑞金.,周碧.,...&张武.(2013).西北半干旱区激光雷达探测卷云几何特征和光学厚度.量子电子学报,30(1),66-72.
MLA	王瑾,et al."西北半干旱区激光雷达探测卷云几何特征和光学厚度".量子电子学报 30.1(2013):66-72.