气候变化领域集成服务门户(CCPortal): Analysing the timing of peak warming and minimum winter sea-ice extent in the Southern Ocean during MIS 5e

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DOI	10.1016/j.quascirev.2019.106134
	Analysing the timing of peak warming and minimum winter sea-ice extent in the Southern Ocean during MIS 5e
	Chadwick M.; Allen C.S.; Sime L.C.; Hillenbrand C.-D.
发表日期	2020
ISSN	0277-3791
卷号	229
英文摘要	The peak of the Last Interglacial, Marine Isotope Stage (MIS) 5e (130–116 ka), provides a valuable ‘process analogue’ for validating the climatic feedbacks and forcings likely active under future anthropogenic warming. Reconstructing exact timings of MIS 5e peak warming and minimum winter sea-ice extent (WSIE) throughout the Southern Ocean (SO) will help to identify the interactions and feedbacks within the ice-ocean system. Here we present a new MIS 5e marine sediment record from the SW Atlantic sector together with 28 published core records (chronologies standardised to the LR04 δ18O benthic stack; Lisiecki and Raymo, 2005) to investigate the timing and sequence of minimum WSIE and peak warming across the SO. Sea-surface temperatures (SSTs) peaked earliest in the Indian (20oE–150oE) and Atlantic (70oW–20oE) sectors, at 128.7 ± 0.8 ka and 127.4 ± 1.1 ka respectively, followed by the Pacific sector (150oE–70oW) at 124.9 ± 3.6 ka. The interval of minimum WSIE for all three sectors occurred within the period from 129–125 ka, consistent with the ∼128 ka sea salt flux minimum in Antarctic ice cores. Minimum WSIE appears to have coincided with peak July insolation at 55 oS, suggesting it could be linked with the mildest winters. The reduced WSIE during MIS 5e would have likely reduced the production of deep- and bottom water masses, inhibiting storage of CO2 in the abyssal ocean and lowering nutrient availability in SO surface waters. Examining a wide spatial range of proxy records for MIS 5e is a critical step forward in understanding climatic interactions and processes that will be active under warmer global temperatures. © 2019 Elsevier Ltd
英文关键词	Interglacial; Palaeoceanography; Sediment cores; Southern Ocean
语种	英语
scopus关键词	Glacial geology; Sea ice; Submarine geology; Surface waters; Timing circuits; Anthropogenic warming; Interglacial; Marine isotope stages; Nutrient availability; Palaeoceanography; Sea surface temperatures; Sediment core; Southern ocean; Oceanography; abyssal zone; anthropogenic effect; climate feedback; climate forcing; global warming; ice core; ice-ocean interaction; interglacial; Last Interglacial; marine isotope stage; marine sediment; nutrient availability; paleoceanography; sea ice; sea salt; sea surface temperature; sediment core; water mass; winter; Indian Sector; Pacific Sector; Southern Ocean
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/151615
作者单位	British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom; Ocean and Earth Science, National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton, SO14 3ZH, United Kingdom
推荐引用方式 GB/T 7714	Chadwick M.,Allen C.S.,Sime L.C.,et al. Analysing the timing of peak warming and minimum winter sea-ice extent in the Southern Ocean during MIS 5e[J],2020,229.
APA	Chadwick M.,Allen C.S.,Sime L.C.,&Hillenbrand C.-D..(2020).Analysing the timing of peak warming and minimum winter sea-ice extent in the Southern Ocean during MIS 5e.Quaternary Science Reviews,229.
MLA	Chadwick M.,et al."Analysing the timing of peak warming and minimum winter sea-ice extent in the Southern Ocean during MIS 5e".Quaternary Science Reviews 229(2020).