期刊
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷 335, 期 -, 页码 61-70出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.palaeo.2011.01.027
关键词
Blue-ice moraine; West Antarctic Ice Sheet; Geomorphology; Last Glacial cycle
资金
- UK Natural Environment Research Council
- NERC [NE/F014260/1] Funding Source: UKRI
- Natural Environment Research Council [NE/F014260/1] Funding Source: researchfish
We present a hypothesis that best explains cosmogenic isotope data on blue-ice moraines in the Heritage Range, West Antarctica. The age of the moraines implies that they, and the related ice-sheet surface with which they are associated, have persisted on the flanks of nunataks throughout at least the last interglacial/glacial cycle. The implication is that although the West Antarctic: Ice Sheet (WAIS) may have fluctuated in thickness during glacial cycles, the central dome has remained intact for at least 200 kyr and possibly even for 400 kyr. Such a finding, if substantiated, would contribute to our understanding of the sensitivity of the WAIS to climate change. Further it would be a powerful geomorphic constraint on models of the past behaviour of the ice sheet during glacial cycles and thus those predicting the future of the ice sheet in a warming world. (c) 2011 Elsevier B.V. All rights reserved.
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