DOI: 10.1029/2018JC013982
Scopus记录号: 2-s2.0-85050362094
论文题名: A New Bathymetry for the Southeastern Filchner-Ronne Ice Shelf: Implications for Modern Oceanographic Processes and Glacial History
作者: Rosier S.H.R. ; Hofstede C. ; Brisbourne A.M. ; Hattermann T. ; Nicholls K.W. ; Davis P.E.D. ; Anker P.G.D. ; Hillenbrand C.-D. ; Smith A.M. ; Corr H.F.J.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 7 起始页码: 4610
结束页码: 4623
语种: 英语
英文关键词: Antarctica
; bathymetry
; ice shelf
; seismics
; tides
英文摘要: The Filchner-Ronne Ice Shelf, the ocean cavity beneath it, and the Weddell Sea that bounds it, form an important part of the global climate system by modulating ice discharge from the Antarctic Ice Sheet and producing cold dense water masses that feed the global thermohaline circulation. A prerequisite for modeling the ice sheet and oceanographic processes within the cavity is an accurate knowledge of the sub-ice sheet bedrock elevation, but beneath the ice shelf where airborne radar cannot penetrate, bathymetric data are sparse. This paper presents new seismic point measurements of cavity geometry from a particularly poorly sampled region south of Berkner Island that connects the Filchner and Ronne ice shelves. An updated bathymetric grid formed by combining the new data with existing data sets reveals several new features. In particular, a sill running between Berkner Island and the mainland could alter ocean circulation within the cavity and change our understanding of paleo-ice stream flow in the region. Also revealed are deep troughs near the grounding lines of Foundation and Support Force ice streams, which provide access for seawater with melting potential. Running an ocean tidal model with the new bathymetry reveals large differences in tidal current velocities, both within the new gridded region and further afield, potentially affecting sub-ice shelf melt rates. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113584
Appears in Collections: 气候减缓与适应
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作者单位: British Antarctic Survey, Cambridge, United Kingdom; Now at Geography and Environmental Sciences, Northumbria University, Newcastle, United Kingdom; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Akvaplan-niva AS, Tromsø, Norway
Recommended Citation:
Rosier S.H.R.,Hofstede C.,Brisbourne A.M.,et al. A New Bathymetry for the Southeastern Filchner-Ronne Ice Shelf: Implications for Modern Oceanographic Processes and Glacial History[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(7)