气候变化领域集成服务门户(CCPortal): Highly branched isoprenoids reveal onset of deglaciation followed by dynamic sea-ice conditions in the western Amundsen Sea; Antarctica

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DOI	10.1016/j.quascirev.2019.106103
	Highly branched isoprenoids reveal onset of deglaciation followed by dynamic sea-ice conditions in the western Amundsen Sea; Antarctica
	Lamping N.; Müller J.; Esper O.; Hillenbrand C.-D.; Smith J.A.; Kuhn G.
发表日期	2020
ISSN	0277-3791
卷号	228
英文摘要	The Amundsen Sea drainage sector of the West Antarctic Ice Sheet (WAIS) is widely regarded as a candidate for triggering potential WAIS collapse. The grounded ice sheet drains into the Amundsen Sea Embayment and is thereby buttressed by its fringing ice shelves, which have thinned at an alarming rate. Satellite-based observations additionally reveal a considerable long-term decrease in sea-ice cover in the Amundsen Sea over the last two decades although the long-term significance of this trend is unclear due to the short instrumental record since the 1970s. In this context, investigations of past sea-ice conditions are crucial for improving our understanding of the influence that sea-ice variability has on the adjacent marine environment as well as any role it plays in modulating ice shelf and ice sheet dynamics. In this study, we apply novel organic geochemical biomarker techniques to a marine sediment core from the western Amundsen Sea shelf in order to provide a valuable long-term perspective on sea-ice conditions and the retreat of the Getz Ice Shelf during the last deglaciation. We analysed a specific biomarker lipid called IPSO25 alongside a phytoplankton biomarker and sedimentological parameters and additionally applied diatom transfer functions for reconstructing palaeo sea-ice coverage. This multi-proxy data set reveals a dynamic behaviour of the Getz Ice Shelf and sea-ice cover during the deglaciation following the last ice age, with potential linkages to inter-hemispheric seesaw climate patterns. We further apply and evaluate the recently proposed PIPSO25 approach for semi-quantitative sea-ice reconstructions and discuss potential limitations. © 2019 The Authors
英文关键词	Antarctica; HBIs; IPSO25; Marine biomarkers; Palaeoclimatology; Quaternary; Sea ice; West Antarctic Ice Sheet
语种	英语
scopus关键词	Biomarkers; Glaciers; Submarine geology; Antarctica; HBIs; IPSO25; Palaeoclimatology; Quaternary; West antarctic ice sheets; Sea ice; deglaciation; ice cover; ice sheet; ice shelf; isoprenoid; marine environment; marine sediment; Quaternary; sea ice; sediment core; Amundsen Sea; Antarctic Ice Sheet; Antarctica; Antarctica; Getz Ice Shelf; Southern Ocean; West Antarctic Ice Sheet; West Antarctica; Bacillariophyta
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/151636
作者单位	Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Am Alten Hafen 26, Bremerhaven, 27568, Germany; Department of Geosciences, University of Bremen, Klagenfurter Straße, Bremen, 28359, Germany; Marum - Center for Marine Environmental Sciences, Leobener Straße 8, Bremen, 28359, Germany; British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom
推荐引用方式 GB/T 7714	Lamping N.,Müller J.,Esper O.,et al. Highly branched isoprenoids reveal onset of deglaciation followed by dynamic sea-ice conditions in the western Amundsen Sea; Antarctica[J],2020,228.
APA	Lamping N.,Müller J.,Esper O.,Hillenbrand C.-D.,Smith J.A.,&Kuhn G..(2020).Highly branched isoprenoids reveal onset of deglaciation followed by dynamic sea-ice conditions in the western Amundsen Sea; Antarctica.Quaternary Science Reviews,228.
MLA	Lamping N.,et al."Highly branched isoprenoids reveal onset of deglaciation followed by dynamic sea-ice conditions in the western Amundsen Sea; Antarctica".Quaternary Science Reviews 228(2020).