DOI: 10.1002/2015GL063846
论文题名: Heat sources for glacial ice melt in a west Greenland tidewater outlet glacier fjord: The role of subglacial freshwater discharge
作者: Bendtsen J. ; Mortensen J. ; Lennert K. ; Rysgaard Sø.
刊名: Geophysical Research Letters
ISSN: 0094-9189
EISSN: 1944-8920
出版年: 2015
卷: 42, 期: 10 起始页码: 4089
结束页码: 4095
语种: 英语
英文关键词: buoyant plume
; calving glacier
; ice-ocean interaction
; subglacial discharge
Scopus关键词: Heat transfer
; Melting
; Oceanography
; Sea level
; Buoyant plume
; Freshwater discharge
; Global sea level rise
; Greenland Ice Sheet
; Ice-ocean interactions
; Melt-water discharges
; Ocean heat transport
; Surface salinities
; Ice
; energy balance
; fjord
; freshwater input
; glacier mass balance
; heat source
; heat transfer
; ice-ocean interaction
; iceberg calving
; melting
; plume
; sea level change
; tidewater glacier
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: The melting of tidewater outlet glaciers from the Greenland Ice Sheet contributes significantly to global sea level rise. Accelerated mass loss is related to melt processes in front of calving glaciers, yet the role of ocean heat transports is poorly understood. Here we present the first direct measurements from a subglacial plume in front of a calving tidewater outlet glacier. Surface salinity in the plume corresponded to a meltwater content of 7%, which is indicative of significant entrainment of warm bottom water and, according to plume model calculations, significant ice melt. Energy balance of the area near the glacier showed that ice melt was mainly due to ocean heat transport and that direct plume-associated melt was only important in periods with high meltwater discharge rates of ∼100 m3 s-1. Ocean mixing outside of the plume area was thus the primary heat source for melting glacier ice. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931572574&doi=10.1002%2f2015GL063846&partnerID=40&md5=3def6ba2bbc79b89899bf7920ba6ac9b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8805
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: Arctic Research Centre, Aarhus University, Aarhus, Denmark
Recommended Citation:
Bendtsen J.,Mortensen J.,Lennert K.,et al. Heat sources for glacial ice melt in a west Greenland tidewater outlet glacier fjord: The role of subglacial freshwater discharge[J]. Geophysical Research Letters,2015-01-01,42(10).