气候变化领域集成服务门户(CCPortal): Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition

CCPortal

DOI	10.5194/tc-13-2023-2019
	Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition - Implications for Oldest Ice
	Sutter J.; Fischer H.; Grosfeld K.; Karlsson N.B.; Kleiner T.; Van Liefferinge B.; Eisen O.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2023
结束页码	2041
卷号	13 期号:7
英文摘要	The international endeavour to retrieve a continuous ice core, which spans the middle Pleistocene climate transition ca. 1.2-0.9 Myr ago, encompasses a multitude of field and model-based pre-site surveys. We expand on the current efforts to locate a suitable drilling site for the oldest Antarctic ice core by means of 3-D continental ice-sheet modelling. To this end, we present an ensemble of ice-sheet simulations spanning the last 2 Myr, employing transient boundary conditions derived from climate modelling and climate proxy records. We discuss the imprint of changing climate conditions, sea level and geothermal heat flux on the ice thickness, and basal conditions around previously identified sites with continuous records of old ice. Our modelling results show a range of configurational ice-sheet changes across the middle Pleistocene transition, suggesting a potential shift of the West Antarctic Ice Sheet to a marine-based configuration. Despite the middle Pleistocene climate reorganisation and associated ice-dynamic changes, we identify several regions conducive to conditions maintaining 1.5 Myr (million years) old ice, particularly around Dome Fuji, Dome C and Ridge B, which is in agreement with previous studies. This finding strengthens the notion that continuous records with such old ice do exist in previously identified regions, while we are also providing a dynamic continental ice-sheet context. © 2019 Author(s).
学科领域	boundary condition; climate modeling; climate variation; heat flux; ice core; ice sheet; modeling; Pleistocene; proxy climate record; sea level change; Antarctic Ice Sheet; Antarctica; Dome Concordia; Dome Fuji; East Antarctica; West Antarctic Ice Sheet; West Antarctica
语种	英语
scopus关键词	boundary condition; climate modeling; climate variation; heat flux; ice core; ice sheet; modeling; Pleistocene; proxy climate record; sea level change; Antarctic Ice Sheet; Antarctica; Dome Concordia; Dome Fuji; East Antarctica; West Antarctic Ice Sheet; West Antarctica
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118854
作者单位	Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27568, Germany; Climate and Environmental Physics, Physics Institute, Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland; Laboratoire de Glaciologie, Université Libre de Bruxelles, CP 160/03, Avenue F.D. Roosevelt 50, Brussels, 1050, Belgium; Department of Geosciences, University of Bremen, Bremen, Germany; Norwegian Polar Institute Fram Centre, Tromsø, 9296, Norway
推荐引用方式 GB/T 7714	Sutter J.,Fischer H.,Grosfeld K.,et al. Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition - Implications for Oldest Ice[J],2019,13(7).
APA	Sutter J..,Fischer H..,Grosfeld K..,Karlsson N.B..,Kleiner T..,...&Eisen O..(2019).Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition - Implications for Oldest Ice.The Cryosphere,13(7).
MLA	Sutter J.,et al."Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition - Implications for Oldest Ice".The Cryosphere 13.7(2019).