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DOI	10.1002/hyp.6977
	Preferential exchange rate effect of isotopic fractionation in a melting snowpack
	Zhou, Shiqiao; Nakawo, Masayoshi; Hashimoto, Shigemasa; Sakai, Akiko
通讯作者	Zhou, SQ (通讯作者)
发表日期	2008
ISSN	0885-6087
起始页码	3734
结束页码	3740
卷号	22 期号:18
英文摘要	Stable isotope exchange processes between solid and liquid phases of a natural melting snowpack are investigated in detail by separating the liquid water from snow grains at different depths of the snowpack and collecting the bottom discharge using a lysimeter. In the melting-freezing mass exchange process between the two phases, the theoretical slope of the delta D-delta(18)O line for newly refrozen ice is calculated to be nearly that of pore water. However, based on observations of the isotopic evolution and snow grain coarsening of the snowpack, it is demonstrated that the slope of the delta D-delta(18)O line for newly refrozen ice is equal to that of the original ice. This is proved to be due to preferential water flow in the snowpack, which leads to relatively more deuterium and less oxygen-18 in the mobile water than the immobile water because of the kinetic effect. Higher mass exchange rate in the mobile water region results in excess deuterium in the bulk refrozen ice, compared with the fractionation of uniform fractionation factors and exchange rate. This effect, which is termed the 'preferential exchange rate effect of isotopic fractionation'. is shown to be larger in the lower part than the upper part of the snowpack. Copyright (C) 2008 John Wiley & Sons, Ltd.
关键词	ONE-DIMENSIONAL MODEL STABLE-ISOTOPES DEUTERIUM EXCESS SOLUTE TRANSPORT OXYGEN-ISOTOPE ICE EVOLUTION WATER PRECIPITATION SNOWMELT
英文关键词	snowpack; isotopic fractionation; preferential water flow; snowmelt
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:000259281300014
来源期刊	HYDROLOGICAL PROCESSES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257602
推荐引用方式 GB/T 7714	Zhou, Shiqiao,Nakawo, Masayoshi,Hashimoto, Shigemasa,et al. Preferential exchange rate effect of isotopic fractionation in a melting snowpack[J]. 中国科学院青藏高原研究所,2008,22(18).
APA	Zhou, Shiqiao,Nakawo, Masayoshi,Hashimoto, Shigemasa,&Sakai, Akiko.(2008).Preferential exchange rate effect of isotopic fractionation in a melting snowpack.HYDROLOGICAL PROCESSES,22(18).
MLA	Zhou, Shiqiao,et al."Preferential exchange rate effect of isotopic fractionation in a melting snowpack".HYDROLOGICAL PROCESSES 22.18(2008).