DOI: 10.1002/2017JC013464
Scopus记录号: 2-s2.0-85044943415
论文题名: Influence of Barrier Wind Forcing on Heat Delivery Toward the Greenland Ice Sheet
作者: Fraser N.J. ; Inall M.E.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 2513
结束页码: 2538
语种: 英语
英文关键词: Arctic oceanography
; fjord circulation
; hydrodynamic modeling
; shelf exchange
Scopus关键词: fjord
; freshwater input
; hydrodynamics
; ice-ocean interaction
; internal wave
; modeling
; oceanography
; overturn
; seasonal variation
; shelf dynamics
; warm water
; water mass
; wind forcing
; Arctic
; Greenland
; Greenland Ice Sheet
; Kangerlussuaq Fjord
英文摘要: A high-resolution numerical hydrodynamic model of Kangerdlugssuaq Fjord and the adjacent southeast Greenland shelf region was constructed in order to investigate the dynamics of fjord-shelf exchange. Recent studies have suggested that rapid exchange flows, driven by along-shelf barrier wind events, are the dominant agent of exchange between fjord and shelf. These events are prone to occur during the winter, when freshwater forcing is minimal and observations of the fjord interior are scarce. Subglacial freshwater discharge was held at zero, so that any buoyancy-driven overturning circulation was driven by melting alone. The model described a geostrophically balanced background flow transporting water masses between the fjord mouth and the glacier terminus, indicating that rotational effects are of order-one importance. Barrier wind events were found to trigger coastally trapped internal wave activity within fjord, temporarily enhancing exchange and vertical mixing, and causing warm water to oscillate in the along-fjord direction. These internal waves were also found to enhance the background flow via Stokes' drift. Heat delivery through the fjord mouth was smaller than that recorded in summer observations, however the system is more effective at delivering this heat to the head of the fjord. There exists the potential for wintertime melting at the ice-ocean interface to be significant to the same order as summertime melting. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114175
Appears in Collections: 气候减缓与适应
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作者单位: Scottish Association for Marine Science, Scottish Marine Institute, Oban, United Kingdom; Department of Geosciences, University of Edinburgh, Grant Institute, Edinburgh, United Kingdom
Recommended Citation:
Fraser N.J.,Inall M.E.. Influence of Barrier Wind Forcing on Heat Delivery Toward the Greenland Ice Sheet[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)