Holden, P. B.; Edwards, N. R.; Wolff, E. W.; Valdes, P. J. and Singarayer, J. S.
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|DOI (Digital Object Identifier) Link:||http://dx.doi.org/doi:10.1002/jqs.1525|
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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|
|Copyright Holders:||2011 John Wiley & Sons, Ltd|
|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)|
|Depositing User:||Philip Holden|
|Date Deposited:||21 Jun 2011 13:42|
|Last Modified:||24 Nov 2012 21:39|
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