DOI: 10.1016/j.gloplacha.2016.04.009
论文题名: The influence of continental shelf bathymetry on Antarctic Ice Sheet response to climate forcing
作者: Bart P.J. ; Mullally D. ; Golledge N.R.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2016
卷: 142 起始页码: 87
结束页码: 95
语种: 英语
英文关键词: Antarctic Ice Sheet
; Overdeepened
; Parallel Ice Sheet Model
; Shelf bathymetry
Scopus关键词: Ablation
; Bathymetry
; Climate models
; Electric grounding
; Glacial geology
; Glaciers
; Antarctic ice sheets
; Climate forcings
; Continental shelves
; Grounding line
; Ice sheet models
; Last glacial cycles
; Middle Miocene
; Overdeepened
; Ice
英文摘要: We investigated whether shelf-depth changes would have influenced Antarctic Ice Sheet (AIS) response to climate forcing using the Parallel Ice Sheet Model (PISM). The simulations confirm that this would have indeed been the case. For the last-glacial-cycle (LGC) type forcing we prescribed, a modern-like polar AIS surrounded by shallow and intermediate bathymetries experiences rapid grounding-line advance early during the transition from interglacial to glacial forcing. This is in contrast to our baseline simulation of AIS response on the currently overdeepened bathymetry, which showed the expected gradual advance of grounding lines to the same climatic forcing. In the simulation, the more-positive mass balance for the shallower bathymetry is primarily a result of significantly lower calving fluxes from smaller-area ice shelves. On the basis of these results, we suggest that shelf bathymetry is an important boundary condition that should be considered when reconstructing AIS behavior since at least the middle Miocene. We note that caution should be used when applying these concepts because the particular way in which AIS mass balance is altered by shelf depth changes depends on how the changes in accumulation and ablation at the marine terminations combine with accumulation and ablation on land. © 2016 Elsevier B.V.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84970024720&doi=10.1016%2fj.gloplacha.2016.04.009&partnerID=40&md5=ee7601b5988fc5e9d287f397f95eb1c1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11668
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Department of Geology and Geophysics, Louisiana State University, Howe-Russell-Kniffen Geoscience Complex, E235, Baton Rouge, LA, United States
Recommended Citation:
Bart P.J.,Mullally D.,Golledge N.R.. The influence of continental shelf bathymetry on Antarctic Ice Sheet response to climate forcing[J]. Global and Planetary Change,2016-01-01,142.