Variations of snow temperature and their influence on snow cover physical parameters in the Western Tianshan Mountains, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2011 > Vol8 No.6

	Variations of snow temperature and their influence on snow cover physical parameters in the Western Tianshan Mountains, China
	Chen Xia ; Wei WenShou ; Liu MingZhe ; Gu GuangQin
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2011-12
卷号	8 期号:6 页码:827–837
关键词	Snow temperature Vertical temperature gradient Optimal fitting function Snow density Western Tianshan Mountains China
ISSN号	1672-6316
通讯作者	Wei, WS (reprint author), China Meteorol Adm, Inst Desert Meteorol, Urumqi 830011, Peoples R China.
英文摘要	This article discussed about snow temperature variations and their impact on snow cover parameters. Automatic temperature recorders were used to sample at 10-minute intervals at the Tianshan Station for Snow-cover and Avalanche Research, Chinese Academy of Sciences. 10-layer snow temperature and the snow cover parameters were measured by the snow property analyzer (Snow Fork) in its Stable period, Interim period and Snow melting period. Results indicate that the amplitude of the diurnal fluctuation in the temperature during Snow melting period is 1.62 times greater than that during Stable period. Time up to the peak temperature at the snow surface lags behind the peak solar radiation by more than 2.5 hours, and lags behind the peak atmospheric temperature by more than 0.2 hours during all three periods. The optimal fitted function of snow temperature profile becomes more complicated from Stable period to Snow melting period. 22 h temperature profiles in Stable period are the optimal fitted by cubic polynomial equation. In Interim period and Snow melting period, temperature profiles are optimal fitted by exponential equation between sunset and sunrise, and by Fourier function when solar radiation is strong. The vertical gradient in the snow temperature reaches its maximum value at the snow surface for three periods. The peak of this maximum value occurs during Stable period, and is 4.46 times greater than during Interim period. The absolute value of temperature gradient is lower than 0.1A degrees C cm(-1) for 30 cm beneath snow surface. Snow temperature and temperature gradient in Stable period similar to Interim period indirectly cause increase (decrease) of snow density mainly by increasing (decreasing) permittivity. While it dramatically increases its water content to change its permittivity and snow density in Snow melting period.
语种	英语
公开日期	2013-08-12
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/5876]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2011_Vol8 No.6
推荐引用方式 GB/T 7714	Chen Xia,Wei WenShou,Liu MingZhe,et al. Variations of snow temperature and their influence on snow cover physical parameters in the Western Tianshan Mountains, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2011,8(6):827–837.
APA	Chen Xia,Wei WenShou,Liu MingZhe,&Gu GuangQin.(2011).Variations of snow temperature and their influence on snow cover physical parameters in the Western Tianshan Mountains, China.JOURNAL OF MOUNTAIN SCIENCE,8(6),827–837.
MLA	Chen Xia,et al."Variations of snow temperature and their influence on snow cover physical parameters in the Western Tianshan Mountains, China".JOURNAL OF MOUNTAIN SCIENCE 8.6(2011):827–837.