气候变化领域集成服务门户(CCPortal): The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf

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DOI	10.1038/s41467-021-23093-0
	The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf
	Krisch S.; Hopwood M.J.; Schaffer J.; Al-Hashem A.; Höfer J.; Rutgers van der Loeff M.M.; Conway T.M.; Summers B.A.; Lodeiro P.; Ardiningsih I.; Steffens T.; Achterberg E.P.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Approximately half of the freshwater discharged from the Greenland and Antarctic Ice Sheets enters the ocean subsurface as a result of basal ice melt, or runoff draining via the grounding line of a deep ice shelf or marine-terminating glacier. Around Antarctica and parts of northern Greenland, this freshwater then experiences prolonged residence times in large cavities beneath floating ice tongues. Due to the inaccessibility of these cavities, it is unclear how they moderate the freshwater associated supply of nutrients such as iron (Fe) to the ocean. Here, we show that subglacial dissolved Fe export from Nioghalvfjerdsbrae (the ‘79°N Glacier’) is decoupled from particulate inputs including freshwater Fe supply, likely due to the prolonged ~162-day residence time of Atlantic water beneath Greenland’s largest floating ice-tongue. Our findings indicate that the overturning rate and particle-dissolved phase exchanges in ice cavities exert a dominant control on subglacial nutrient supply to shelf regions. © 2021, The Author(s).
语种	英语
scopus关键词	fresh water; ice; iron; trace element; basal ice; discharge; dissolved matter; drainage; floating ice; grounding line; ice shelf; iron; melting; runoff; Article; glacier; Greenland; macronutrient; melting point; season; water residence time; Antarctica; Arctic; Greenland; Greenland Ice Sheet
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251439
作者单位	GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Escuela de Ciencias del Mar, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; College of Marine Science, University of South Florida, St Petersburg, FL, United States; Department of Chemistry, University of Lleida – Agrotecnio-Cerca Centre, Lleida, Spain; NIOZ Royal Netherlands Institute for Sea Research, Utrecht University, Den Burg, Texel, Netherlands
推荐引用方式 GB/T 7714	Krisch S.,Hopwood M.J.,Schaffer J.,et al. The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf[J],2021,12(1).
APA	Krisch S..,Hopwood M.J..,Schaffer J..,Al-Hashem A..,Höfer J..,...&Achterberg E.P..(2021).The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf.Nature Communications,12(1).
MLA	Krisch S.,et al."The 79°N Glacier cavity modulates subglacial iron export to the NE Greenland Shelf".Nature Communications 12.1(2021).