Regression coefficients of thermal gradients in northwestern Europe during the last glacial–Holocene transition using beetle MCR data

Witte, Henk; Coope, G. Russell; Lemdahl, Geoffrey; Lowe, John J.

doi:10.1002/(sici)1099-1417(199809/10)13:5<435::aid-jqs409>3.0.co;2-w

Cited by 37 publications

(14 citation statements)

References 50 publications

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“…Several Lateglacial sites in the UK have yielded important data pertinent to our understanding of climate change through this period, generally indicating a stadial mean July temperature of c. 8-10 C at sea level (Witte et al, 1998;Brooks & Birks, 2000) and winter temperatures no warmer than c. -13.5 C (Witte et al, 1998).…”

supporting

confidence: 61%

High-resolution numerical simulation of Younger Dryas glaciation in Scotland

Golledge

Hubbard

Sugden

2008

Quaternary Science Reviews

116

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We use a 500 m resolution three-dimensional thermomechanical ice -sheet model forced by a scaled GRIP temperature pattern to retrodict the extent of glaciers during the Younger Dryas episode in Scotland. Using empirical data from sources spanning half a century we systematically perturb temperature depression, precipitation distribution, and the amount of basal sliding to identify the parameter space that most closely reproduces the glacier margins identified from field investigations. Arithmetic comparison of predicted ice cover with empirical glacier extent enables mismatch to be quantified and an 'optimum fit' timeslice to be identified. This 'best-fit' scenario occurs with a maximum mean annual temperature depression from present of 10 C and steep eastward and northward gradients imposed on a modern precipitation distribution, coupled with restricted basal sliding. Even small deviations around these values produce considerably less well-fitting glacier configurations, suggesting that only a narrow range of optimal parameterisation exists. Mismatch between modelled and empirically reconstructed glacier extents occurs as a consequence of local conditions not accommodated by the model, such as wind-blown snow accumulation and lake (loch) bathymetry, and where geological evidence is equivocal. At the domain scale, however, our simulation suggests that inception of Scottish glaciers occurs rapidly, and leads to a coherent ice cap within 400 years of initial climatic cooling. According to our model, the ice cap begins to decay relatively early in the stadial, probably as a result of increasing aridity leading to net thinning and recession of many of its margins, with final and catastrophic collapse of the ice cap occurring largely within a century.

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supporting

confidence: 61%

High-resolution numerical simulation of Younger Dryas glaciation in Scotland

Golledge

Hubbard

Sugden

2008

Quaternary Science Reviews

116

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“…As a result, ground drainage during cold stage summer months may not have been that different from present as temperatures were still well above freezing (Coope and Lemdahl, 1995). In contrast, low winter temperatures (Witte et al, 1998) A partial reversal of this occurred following extensive prehistoric forest clearance, perhaps with a similar rapid response.…”

Section: Collins Et Al Kennet Floodplainmentioning

confidence: 99%

Floodplain environmental change during the Younger Dryas and Holocene in Northwest Europe: Insights from the lower Kennet Valley, south central England

Collins¹,

Worsley²,

Keith-Lucas³

et al. 2006

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The widespread application of the Mangerud et al chronostratigraphic scheme and its associated terminology, even in regions or areas for which it was never originally intended (see Wohlfarth Secondly, the climatic changes themselves, which are frequently used to define the boundaries of the "Bølling", "Allerød", and "Younger Dryas" intervals in regional stratigraphic schemes, appear to have been diachronous across northwestern Europe Witte et al 1998). This, of course, calls into question the assumption that stratigraphic boundaries defined on the basis of climatic change are synchronous over large areas.…”

Section: Introductionmentioning

confidence: 97%

Radiocarbon Dating the Last Glacial-Interglacial Transition (Ca. 14–9¹⁴C Ka Bp) in Terrestrial and Marine Records: The Need for New Quality Assurance Protocols

Lowe¹,

Walker²

2000

Radiocarbon

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ABSTRACT. The publication during the 1990s of Greenland ice-core records spanning the transition from the Last Cold Stage to the present interglacial (ca. 14-9 14 C ka BP) presented new challenges to scientists working on marine and terrestrial sequences from this important time interval. In particular, there is now an overriding imperative to increase the levels of precision by which events during this period can be dated and correlated. We review some of the problems commonly encountered when using radiocarbon dating for these purposes, and consider some of the new approaches that will be required if this dating method is to provide a basis for a high precision chronology for the last glacial-interglacial transition.

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Regression coefficients of thermal gradients in northwestern Europe during the last glacial–Holocene transition using beetle MCR data

Cited by 37 publications

References 50 publications

High-resolution numerical simulation of Younger Dryas glaciation in Scotland

High-resolution numerical simulation of Younger Dryas glaciation in Scotland

Floodplain environmental change during the Younger Dryas and Holocene in Northwest Europe: Insights from the lower Kennet Valley, south central England

Radiocarbon Dating the Last Glacial-Interglacial Transition (Ca. 14–9¹⁴C Ka Bp) in Terrestrial and Marine Records: The Need for New Quality Assurance Protocols

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Regression coefficients of thermal gradients in northwestern Europe during the last glacial–Holocene transition using beetle MCR data

Cited by 37 publications

References 50 publications

High-resolution numerical simulation of Younger Dryas glaciation in Scotland

High-resolution numerical simulation of Younger Dryas glaciation in Scotland

Floodplain environmental change during the Younger Dryas and Holocene in Northwest Europe: Insights from the lower Kennet Valley, south central England

Radiocarbon Dating the Last Glacial-Interglacial Transition (Ca. 14–914C Ka Bp) in Terrestrial and Marine Records: The Need for New Quality Assurance Protocols

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Product

Resources

About

Radiocarbon Dating the Last Glacial-Interglacial Transition (Ca. 14–9¹⁴C Ka Bp) in Terrestrial and Marine Records: The Need for New Quality Assurance Protocols