气候变化领域集成服务门户(CCPortal): Regional modeling of the Shirase drainage basin, East Antarctica: Full Stokes vs. shallow ice dynamics

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DOI	10.5194/tc-11-2213-2017
	Regional modeling of the Shirase drainage basin, East Antarctica: Full Stokes vs. shallow ice dynamics
	Seddik H.; Greve R.; Zwinger T.; Sugiyama S.
发表日期	2017
ISSN	19940416
卷号	11 期号:5
英文摘要	A hierarchy of approximations of the force balance for the flow of grounded ice exists, ranging from the most sophisticated full Stokes (FS) formulation to the most simplified shallow ice approximation (SIA). Both are implemented in the ice flow model Elmer/Ice, and we compare them by applying the model to the East Antarctic Shirase drainage basin. First, we apply the control inverse method to infer the distribution of basal friction with FS. We then compare FS and SIA by simulating the flow of the drainage basin under present-day conditions and for three scenarios 100 years into the future defined by the SeaRISE (Sea-level Response to Ice Sheet Evolution) project. FS reproduces the observed flow pattern of the drainage basin well, in particular the zone of fast flow near the grounding line, while SIA generally overpredicts the surface velocities. As for the transient scenarios, the ice volume change (relative to the constant-climate control run) of the surface climate experiment is nearly the same for FS and SIA, while for the basal sliding experiment (halved basal friction), the ice volume change is ∼ 30% larger for SIA than for FS. This confirms findings of earlier studies that, in order to model ice sheet areas containing ice streams and outlet glaciers with high resolution and precision, careful consideration must be given to the choice of a suitable force balance. © of Author(s) 2017.
学科领域	drainage basin; flow pattern; glacier; glacier flow; ice flow; ice sheet; ice stream; volume change; Antarctica; East Antarctica; Shirase Glacier
语种	英语
scopus关键词	drainage basin; flow pattern; glacier; glacier flow; ice flow; ice sheet; ice stream; volume change; Antarctica; East Antarctica; Shirase Glacier
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119331
作者单位	Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-ku, Sapporo, 060-0819, Japan; CSC-IT Center for Science, P.O. Box 405, Espoo, 02101, Finland
推荐引用方式 GB/T 7714	Seddik H.,Greve R.,Zwinger T.,et al. Regional modeling of the Shirase drainage basin, East Antarctica: Full Stokes vs. shallow ice dynamics[J],2017,11(5).
APA	Seddik H.,Greve R.,Zwinger T.,&Sugiyama S..(2017).Regional modeling of the Shirase drainage basin, East Antarctica: Full Stokes vs. shallow ice dynamics.Cryosphere,11(5).
MLA	Seddik H.,et al."Regional modeling of the Shirase drainage basin, East Antarctica: Full Stokes vs. shallow ice dynamics".Cryosphere 11.5(2017).