气候变化领域集成服务门户(CCPortal): Could promontories have restricted sea-glacier penetration into marine embayments during Snowball Earth events?

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DOI	10.5194/tc-11-1141-2017
	Could promontories have restricted sea-glacier penetration into marine embayments during Snowball Earth events?
	Campbell A.J.; Massarano B.; Waddington E.D.; Warren S.G.
发表日期	2017
ISSN	19940416
卷号	11 期号:3
英文摘要	During the Neoproterozoic (∼1000-550 Ma), Earth experienced several climate excursions of extreme cold, often referred to as the Snowball Earth events. During these periods, thick flowing ice, referred to as sea glaciers, covered the entire planet's oceans. In addition, there is evidence that photosynthetic eukaryotic algae survived during these periods. With thick sea glaciers covering the oceans, it is uncertain where these organisms survived. One hypothesis is that these algae survived in marine embayments hydrologically connected to the global ocean, where the flow of sea glacier could be resisted. In order for an embayment to act as a refugium, the invading sea glacier must not completely penetrate the embayment. Recent studies have shown that straight-sided marine embayments could have prevented full sea-glacier penetration under a narrow range of climate conditions suitable for the Snowball Earth events. Here we test whether promontories, i.e., headlands emerging from a side shoreline, could further restrict sea-glacier flow. We use an ice-flow model, suitable for floating ice, to determine the flow of an invading sea glacier. We show that promontories can expand the range of climate conditions allowing refugia by resisting the flow of invading sea glaciers. © Author(s) 2017.
学科领域	alga; bay; climate conditions; Earth; eukaryote; extreme event; glacier dynamics; ice flow; marine environment; paleoceanography; paleoecology; Proterozoic; range expansion; refugium; sea ice; survival; algae; Eukaryota
语种	英语
scopus关键词	alga; bay; climate conditions; Earth; eukaryote; extreme event; glacier dynamics; ice flow; marine environment; paleoceanography; paleoecology; Proterozoic; range expansion; refugium; sea ice; survival; algae; Eukaryota
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119399
作者单位	Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States; Astrobiology Program, University of Washington, Seattle, WA, United States; School of Surveying, University of Otago, Dunedin, New Zealand; Pacific Science Center, Seattle, WA, United States
推荐引用方式 GB/T 7714	Campbell A.J.,Massarano B.,Waddington E.D.,et al. Could promontories have restricted sea-glacier penetration into marine embayments during Snowball Earth events?[J],2017,11(3).
APA	Campbell A.J.,Massarano B.,Waddington E.D.,&Warren S.G..(2017).Could promontories have restricted sea-glacier penetration into marine embayments during Snowball Earth events?.Cryosphere,11(3).
MLA	Campbell A.J.,et al."Could promontories have restricted sea-glacier penetration into marine embayments during Snowball Earth events?".Cryosphere 11.3(2017).