干旱区生态环境知识资源中心(Arid): Holocene ice wedge formation in the Eureka Sound Lowlands, high Arctic Canada

Arid

DOI	10.1017/qua.2020.126
	Holocene ice wedge formation in the Eureka Sound Lowlands, high Arctic Canada
	Campbell-Heaton, Kethra; Lacelle, Denis; Fisher, David; Pollard, Wayne
通讯作者	Lacelle, D (corresponding author), Univ Ottawa, Dept Geog Environm & Geomat, Ottawa, ON K1N 6N5, Canada.
来源期刊	QUATERNARY RESEARCH
ISSN	0033-5894
EISSN	1096-0287
出版年	2021
卷号	102 页码:175-187
英文摘要	Ice wedges are ubiquitous periglacial features in permafrost terrain. This study investigates the timing of ice wedge formation in the Fosheim Peninsula (Ellesmere and Axel Heiberg Islands). In this region, ice wedge polygons occupy similar to 50% of the landscape, the majority occurring below the marine limit in the Eureka Sound Lowlands. Numerical simulations suggest that ice wedges may crack to depths of 2.7-3.6 m following a rapid cooling of the ground over mean winter surface temperatures of -18 degrees C to -38 degrees C, corresponding to the depth of ice wedges in the region. The dissolved organic carbon (DOC)/C1 molar ratios suggest that the DOC in the ice wedges is sourced from snowmelt and not from leaching of the active layer. Based on 32 (14)C(DOC )measurements from 15 ice wedges, the wedges were likely developing between 9000-2500 cal yr BP. This interval also corresponds to the period of peat accumulation in the region, a proxy of increased moisture. Considering that winter air temperatures remained favorable for ice wedge growth throughout the Holocene, the timing of ice wedge formation reflects changes in snowfall. Overall, this study provides the first reconstruction of ice wedge formation from a high Arctic polar desert environment.
英文关键词	Ground ice permafrost radiocarbon dating Arctic
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000675576300014
WOS关键词	DISSOLVED ORGANIC-CARBON ; FOSHEIM PENINSULA ; ELLESMERE-ISLAND ; GROUND ICE ; LAST GLACIATION ; GARRY-ISLAND ; PERMAFROST ; CRACKING ; DOC ; AMS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364437
作者单位	[Campbell-Heaton, Kethra; Lacelle, Denis] Univ Ottawa, Dept Geog Environm & Geomat, Ottawa, ON K1N 6N5, Canada; [Fisher, David] Univ Ottawa, Dept Earth & Environm Sci, Ottawa, ON K1N 6N5, Canada; [Pollard, Wayne] McGill Univ, Dept Geog, Montreal, PQ H3A 0B9, Canada
推荐引用方式 GB/T 7714	Campbell-Heaton, Kethra,Lacelle, Denis,Fisher, David,et al. Holocene ice wedge formation in the Eureka Sound Lowlands, high Arctic Canada[J],2021,102:175-187.
APA	Campbell-Heaton, Kethra,Lacelle, Denis,Fisher, David,&Pollard, Wayne.(2021).Holocene ice wedge formation in the Eureka Sound Lowlands, high Arctic Canada.QUATERNARY RESEARCH,102,175-187.
MLA	Campbell-Heaton, Kethra,et al."Holocene ice wedge formation in the Eureka Sound Lowlands, high Arctic Canada".QUATERNARY RESEARCH 102(2021):175-187.