气候变化领域集成服务门户(CCPortal): Meltwater Intrusions Reveal Mechanisms for Rapid Submarine Melt at a Tidewater Glacier

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DOI	10.1029/2019GL085335
	Meltwater Intrusions Reveal Mechanisms for Rapid Submarine Melt at a Tidewater Glacier
	Jackson R.H.; Nash J.D.; Kienholz C.; Sutherland D.A.; Amundson J.M.; Motyka R.J.; Winters D.; Skyllingstad E.; Pettit E.C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:2
英文摘要	Submarine melting has been implicated as a driver of glacier retreat and sea level rise, but to date melting has been difficult to observe and quantify. As a result, melt rates have been estimated from parameterizations that are largely unconstrained by observations, particularly at the near-vertical termini of tidewater glaciers. With standard coefficients, these melt parameterizations predict that ambient melting (the melt away from subglacial discharge outlets) is negligible compared to discharge-driven melting for typical tidewater glaciers. Here, we present new data from LeConte Glacier, Alaska, that challenges this paradigm. Using autonomous kayaks, we observe ambient meltwater intrusions that are ubiquitous within 400 m of the terminus, and we provide the first characterization of their properties, structure, and distribution. Our results suggest that ambient melt rates are substantially higher (×100) than standard theory predicts and that ambient melting is a significant part of the total submarine melt flux. We explore modifications to the prevalent melt parameterization to provide a path forward for improved modeling of ocean-glacier interactions. ©2019. The Authors.
英文关键词	Glaciers; Melting; Parameterization; Sea level; autonomous kayaks; Discharge driven; fjord; Glacier retreat; plumes; Sea level rise; Standard theories; Tidewater glaciers; Submarines; fjord; glacier retreat; melting; meltwater; plume; sea level change; subglacial deposit; subglacial environment; tidewater glacier; underwater environment; Alaska; LeConte Glacier; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170828
作者单位	Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Department of Natural Sciences, University of Alaska Southeast, Juneau, AK, United States; Department of Earth Sciences, University of Oregon, Eugene, OR, United States; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States
推荐引用方式 GB/T 7714	Jackson R.H.,Nash J.D.,Kienholz C.,et al. Meltwater Intrusions Reveal Mechanisms for Rapid Submarine Melt at a Tidewater Glacier[J],2020,47(2).
APA	Jackson R.H..,Nash J.D..,Kienholz C..,Sutherland D.A..,Amundson J.M..,...&Pettit E.C..(2020).Meltwater Intrusions Reveal Mechanisms for Rapid Submarine Melt at a Tidewater Glacier.Geophysical Research Letters,47(2).
MLA	Jackson R.H.,et al."Meltwater Intrusions Reveal Mechanisms for Rapid Submarine Melt at a Tidewater Glacier".Geophysical Research Letters 47.2(2020).