气候变化领域集成服务门户(CCPortal): Structure, salinity and isotopic composition of multi-year landfast sea ice in Nella Fjord, Antarctica

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DOI	10.1016/j.coldregions.2007.03.005
	Structure, salinity and isotopic composition of multi-year landfast sea ice in Nella Fjord, Antarctica
	Tang, Shulin; Qin, Dahe; Ren, Jiawen; Kang, Jiancheng; Li, Zhijun
发表日期	2007
ISSN	0165-232X
起始页码	170
结束页码	177
卷号	49 期号:2
英文摘要	The structural, salinity and stable oxygen-isotopic properties of multi-year landfast sea-ice samples collected from Nella Fjord, East Antarctica were used to determine the ice formation process and the fractional contribution of snow, in both snow ice and superimposed ice, to the total sea-ice thickness. The textural analysis of the sea-ice cores revealed a general structure of a granular surface layer, horizontal c-axis in the columnar ice and, in some cases, a buried granular-ice layer at depth between two columnar-ice layers. The textural and isotopic properties of the ice core samples indicate that thermodynamic mechanisms alone are responsible for the development of the multi-year fast ice in the region investigated. Superimposed ice contributed 5% to the ice thickness at some sites. Using a mid-range isotopic criterion to distinguish between snow ice and frazil ice in the granular layers, we estimate that snow-ice layers contributed 38% of the total ice thickness in the samples. The actual fraction of snow in the granular-ice layers in different cores was from 1% to 24% of the total sea-ice thickness. (C) 2007 Elsevier B.V All rights reserved.
英文关键词	structure; salinity; delta O-18 composition; multi-year sea ice; landfast sea ice; Antarctic
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158685
作者单位	Tang, SL (corresponding author), Chinese Acad Sci, CAREERI, Key Lab Cryosphere & Environm, Lanzhou 730000, Gansu, Peoples R China.
推荐引用方式 GB/T 7714	Tang, Shulin,Qin, Dahe,Ren, Jiawen,et al. Structure, salinity and isotopic composition of multi-year landfast sea ice in Nella Fjord, Antarctica[J],2007,49(2).
APA	Tang, Shulin,Qin, Dahe,Ren, Jiawen,Kang, Jiancheng,&Li, Zhijun.(2007).Structure, salinity and isotopic composition of multi-year landfast sea ice in Nella Fjord, Antarctica.COLD REGIONS SCIENCE AND TECHNOLOGY,49(2).
MLA	Tang, Shulin,et al."Structure, salinity and isotopic composition of multi-year landfast sea ice in Nella Fjord, Antarctica".COLD REGIONS SCIENCE AND TECHNOLOGY 49.2(2007).