DOI: 10.1002/2016GL070170
论文题名: The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords
作者: Carroll D. ; Sutherland D.A. ; Hudson B. ; Moon T. ; Catania G.A. ; Shroyer E.L. ; Nash J.D. ; Bartholomaus T.C. ; Felikson D. ; Stearns L.A. ; Noël B.P.Y. ; van den Broeke M.R.
刊名: Geophysical Research Letters
ISSN: 0094-8594
EISSN: 1944-8325
出版年: 2016
卷: 43, 期: 18 起始页码: 9739
结束页码: 9748
语种: 英语
英文关键词: fjord
; Greenland Ice Sheet
; modeling
; outlet glacier
; physical oceanography
; submarine melt
Scopus关键词: Glaciers
; Models
; Oceanography
; Submarines
; Equivalent depth
; Fjord
; Glacier geometry
; Greenland Ice Sheet
; Ocean stratification
; Physical oceanography
; Plume structure
; Upwelling plume
; Ice
英文摘要: Meltwater from the Greenland Ice Sheet often drains subglacially into fjords, driving upwelling plumes at glacier termini. Ocean models and observations of submarine termini suggest that plumes enhance melt and undercutting, leading to calving and potential glacier destabilization. Here we systematically evaluate how simulated plume structure and submarine melt during summer months depends on realistic ranges of subglacial discharge, glacier depth, and ocean stratification from 12 Greenland fjords. Our results show that grounding line depth is a strong control on plume-induced submarine melt: deep glaciers produce warm, salty subsurface plumes that undercut termini, and shallow glaciers produce cold, fresh surface-trapped plumes that can overcut termini. Due to sustained upwelling velocities, plumes in cold, shallow fjords can induce equivalent depth-averaged melt rates compared to warm, deep fjords. These results detail a direct ocean-ice feedback that can affect the Greenland Ice Sheet. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990200031&doi=10.1002%2f2016GL070170&partnerID=40&md5=e69ff99b26c32a05039413e21a99f741
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9557
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth Sciences, University of Oregon, Eugene, OR, United States
Recommended Citation:
Carroll D.,Sutherland D.A.,Hudson B.,et al. The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords[J]. Geophysical Research Letters,2016-01-01,43(18).