气候变化领域集成服务门户(CCPortal): On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance

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DOI	10.1016/j.quascirev.2019.06.034
	On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance
	Lowe J.; Matthews I.; Mayfield R.; Lincoln P.; Palmer A.; Staff R.; Timms R.
发表日期	2019
ISSN	0277-3791
起始页码	171
结束页码	186
卷号	219
英文摘要	It has long been assumed that the last glacier expansion in the Scottish Highlands, the Loch Lomond Readvance (LLR), resulted from a cold reversal that was broadly coeval with the ‘Younger Dryas’ episode. This view has recently been challenged, with the suggestion that glacier ice had disappeared from Rannoch Moor, one of the main ice accumulation centres in the SW Scottish Highlands, by as early as 12.5 ka, i.e. within the first half of the ‘Younger Dryas’. Here we present new radiocarbon, tephrostratigraphical and pollen-stratigraphical evidence from one of the key sites on Rannoch Moor, the results of an experiment designed to test this hypothesis. Our results not only contradict that concept, but are fully compatible with other evidence from the SW Scottish Highlands that suggests that the LLR glaciers in this area continued to expand until towards the end of the ‘Younger Dryas’ period, and may have persisted in some places after the onset of the Holocene. We consider the possible reasons for this marked divergence in chronology, a matter that is crucial to resolve because the precise timing of the demise of the LLR glaciers has important palaeoclimatic and other implications. In the wider context, we also draw attention to problems with the general use of the term ‘Younger Dryas’ and why we regard the Greenland stratotype unit and term ‘Greenland Stadial 1’ (GS-1) a more secure stratigraphic comparator. © 2019
英文关键词	Bayesian-based age models; Greenland Stadial 1; Last Termination; Pollen stratigraphy; Radiocarbon dating; Tephrochronology
语种	英语
scopus关键词	Stratigraphy; Timing circuits; Wetlands; Age models; Greenland; Last Termination; Radiocarbon dating; Tephrochronology; Lunar surface analysis; Bayesian analysis; interstadial; palynology; pollen; radiocarbon dating; snow accumulation; stratotype; tephrochronology; Younger Dryas; Arctic; Greenland; Highlands; Rannoch Moor; Scotland; United Kingdom
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/151825
作者单位	Centre for Quaternary Research (CQR), Department of Geography, Royal Holloway University of London, Egham, Surrey, TW20 0EX, United Kingdom; Oxford Radiocarbon Accelerator Unit (ORAU), University of Oxford, Dyson Perrins Building, South Parks Road, Oxford, OX1 3QY, United Kingdom
推荐引用方式 GB/T 7714	Lowe J.,Matthews I.,Mayfield R.,等. On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance[J],2019,219.
APA	Lowe J..,Matthews I..,Mayfield R..,Lincoln P..,Palmer A..,...&Timms R..(2019).On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance.Quaternary Science Reviews,219.
MLA	Lowe J.,et al."On the timing of retreat of the Loch Lomond (‘Younger Dryas’) Readvance icefield in the SW Scottish Highlands and its wider significance".Quaternary Science Reviews 219(2019).