Holden, P. B.; Edwards, N. R.; Wolff, E. W.; Valdes, P. J. and Singarayer, J. S.
(2011).
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| DOI (Digital Object Identifier) Link: | http://dx.doi.org/doi:10.1002/jqs.1525 |
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| Google Scholar: | Look up in Google Scholar |
Abstract
The complex cyclical nature of Pleistocene climate, driven by the evolving orbital configuration of the Earth, is well known but not well understood. A major climatic transition took place at the Mid-Brunhes Event (MBE), ~430 ka BP after which the amplitude of the ~100 ka climate oscillations increased, with substantially warmer interglacials, including periods warmer than the present. Recent modelling has indicated that whilst the timing of these Warmer-than-Present-Transient (WPT) events is consistent with southern warming due to a deglaciation-forced slowdown of Atlantic Meridional Overturning Circulation, the magnitude of warming requires a local amplification, for which a candidate is the feedback of significant West Antarctic Ice Sheet (WAIS) retreat. We here extend this argument, based on the absence of WPTs in the early ice-core record (450 to 800 ka BP), to hypothesise that the MBE could be a manifestation of decreased WAIS stability, triggered by ongoing subglacial erosion.
| Item Type: | Journal Article |
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| Copyright Holders: | 2011 John Wiley & Sons, Ltd |
| ISSN: | 1099-1417 |
| Funders: | NERC |
| Extra Information: | The definitive version is available at www3.interscience.wiley.com |
| Keywords: | Mid-Brunhes Event; West Antarctic ice sheet; interglacials; glacial cycles; GENIE |
| Academic Unit/Department: | Science > Environment, Earth and Ecosystems |
| Interdisciplinary Research Centre: | Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR) |
| Item ID: | 28967 |
| Depositing User: | Philip Holden |
| Date Deposited: | 21 Jun 2011 13:42 |
| Last Modified: | 24 Nov 2012 21:39 |
| URI: | http://oro.open.ac.uk/id/eprint/28967 |
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