干旱区生态环境知识资源中心(Arid): 祁连山区春季降雪滴谱特性分析

Arid

	祁连山区春季降雪滴谱特性分析
其他题名	Analyzing the Characteristics of the Snow Size Spectra in the Qilian Mountains in Spring
	赵果; 楚荣忠; 张彤; 贾伟
ISSN	1000-0240
出版年	2009
卷号	31 期号:2 页码:254-261
中文摘要	利用2008年3-4月青海省祁连县黑河流域气象要素及双偏振多普勒雷达降水观测试验中激光扫描滴谱仪获取的雪滴谱资料,选取了有代表性的4个时段的数据,运用最小二乘法对其进行了M-P分布和Г分布拟合分析.结果表明:Г分布可以很好的模拟实际雪滴谱;雪滴谱同雨滴谱一样同样具有多峰的结构;研究了降雪过程微结构参量的演变,讨论了祁连山地区雪滴谱分布的基本特征.计算了≤2 mm雪片对总降雪量的贡献,表明在该地区春季降雪中,小滴对降雪强度的贡献较大,大滴的出现超前于强降雪.得到了适合该地区降雪的Z～R关系.
英文摘要	Under the Watershed Airborne Telemetry Experimental Research, a lot of snow size data were collected from March to April, 2008. The experiment area is located in the northeast of Tibetan Plateau (39.06° N, 100.44° E), at the altitude of 3 002 m a. s. 1. , with a semi-arid mountain forest climate. The instrumentation used is OTT Parsivel Disdrometer made by German, the new generation of Parsivel disdrometer, which is equipped with the latest state of the art optical laser technology. Of all the snow-size data obtained in the area, data of four durations are selected to compute the average distributions for four different snowfall intensities. Characteristics of snow particle size spectra and evolution of microstructure parameters in the mountainous area are analyzed. There is also a multi-peak structure similar to raindrop distribution. Most of peaks appear in the D<2 mm region. M-P distribution and T distribution are developed based on the precipitation data observed in the Qilian Mountains. It is found that Г distribution is better than M-P distribution for fitting the actual distribution. Then the precipitation with snow size less than 2 mm are calculated, showing the smaller drops playing an important role in precipitation and the large drops appearing ahead of a heavy snow. The radar reflectivity is calculated, and the Z～R relations fitting the snowfall in the Qilian Mountains are got.
中文关键词	雪滴谱 ; M-P分布 ; Г分布 ; Z～R关系
英文关键词	snow-size spectrum M-P distribution Г distribution Z～R relation
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:3567837
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/2XILL650/223280
作者单位	中国科学院,寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	赵果,楚荣忠,张彤,等. 祁连山区春季降雪滴谱特性分析[J]. 中国科学院西北生态环境资源研究院,2009,31(2):254-261.
APA	赵果,楚荣忠,张彤,&贾伟.(2009).祁连山区春季降雪滴谱特性分析.,31(2),254-261.
MLA	赵果,et al."祁连山区春季降雪滴谱特性分析".31.2(2009):254-261.