气候变化领域集成服务门户(CCPortal): Exploring the ingredients required to successfully model the placement; generation; and evolution of ice streams in the British-Irish Ice Sheet

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DOI	10.1016/j.quascirev.2019.105915
	Exploring the ingredients required to successfully model the placement; generation; and evolution of ice streams in the British-Irish Ice Sheet
	Gandy N.; Gregoire L.J.; Ely J.C.; Cornford S.L.; Clark C.D.; Hodgson D.M.
发表日期	2019
ISSN	0277-3791
卷号	223
英文摘要	Ice stream evolution is a major uncertainty in projections of the future of the Greenland and Antarctic Ice sheets. Accurate simulation of ice stream evolution requires an understanding of a number of “ingredients” that control the location and behaviour of ice stream flow. Here, we test the influence of geothermal heat flux, grid resolution, and bed hydrology on simulated ice streaming. The palaeo-record provides snapshots of ice stream evolution, with a particularly well constrained ice sheet being the British-Irish Ice Sheet (BIIS). We implement a new basal sliding scheme coupled with thermo-mechanics into the BISICLES ice sheet model, to simulate the evolution of the BIIS ice streams. We find that the simulated location and spacing of ice streams matches well with the empirical reconstructions of ice stream flow in terms of position and direction when simple bed hydrology is included. We show that the new basal sliding scheme allows the accurate simulation for the majority of BIIS ice streams. The extensive empirical record of the BIIS has allowed the testing of model inputs, and has helped demonstrate the skill of the ice sheet model in simulating the evolution of the location, spacing, and migration of ice streams through millennia. Simulated ice streams also prompt new empirical mapping of features indicative of streaming in the North Channel region. Ice sheet model development has allowed accurate simulation of the palaeo record, and allows for improved modelling of future ice stream behaviour. © 2019 The Authors
英文关键词	Basal hydrology; British-Irish Ice Sheet; Ice sheet modelling; Ice streams; Model-data intercomparison
语种	英语
scopus关键词	Geothermal energy; Glacial geology; Glaciers; Heat flux; Ice control; Location; Stream flow; Well spacing; Antarctic ice sheets; British-Irish ice sheet; Grid resolution; Ice sheet modelling; Ice sheet models; Ice streams; Intercomparisons; Thermo-mechanics; Ice; hydrology; ice sheet; ice stream; numerical model; simulation; spacing; streamflow; Atlantic Ocean; Irish Sea; North Channel [Irish Sea]
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151725
作者单位	School of Earth and Environment, The University of Leeds, Leeds, LS2 9JT, United Kingdom; Department of Geography, The University of Sheffield, Sheffield, S10 2TN, United Kingdom; Department of Geography, Swansea University, Swansea, SA2 8PP, United Kingdom
推荐引用方式 GB/T 7714	Gandy N.,Gregoire L.J.,Ely J.C.,et al. Exploring the ingredients required to successfully model the placement; generation; and evolution of ice streams in the British-Irish Ice Sheet[J],2019,223.
APA	Gandy N.,Gregoire L.J.,Ely J.C.,Cornford S.L.,Clark C.D.,&Hodgson D.M..(2019).Exploring the ingredients required to successfully model the placement; generation; and evolution of ice streams in the British-Irish Ice Sheet.Quaternary Science Reviews,223.
MLA	Gandy N.,et al."Exploring the ingredients required to successfully model the placement; generation; and evolution of ice streams in the British-Irish Ice Sheet".Quaternary Science Reviews 223(2019).