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| Titel |
The terrestrial response to climatic instability during the latter stages of Marine Isotope Stage 11: Examples from Britain |
| VerfasserIn |
J. Sherriff, D. Schreve, I. Candy, A. Palmer |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250066111
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| Zusammenfassung |
| The advent of high resolution marine and ice core records spanning Marine Isotope Stage 11
(c. 425-360 ka BP) reveal evidence for more complexity associated with the interglacial than
previously demonstrated. Broadly, the pattern consists of: a) an early warming associated
with Termination V, b) a main temperate phase, with maximum warmth occurring later in
comparison with other interglacials, and c) a series of stadial-interstadial events associated
with the progressive decline into MIS 10. Whilst the main phase of MIS 11 has
received a lot of attention regarding its potential role as an analogue for the current
interglacial, the pattern of climate change associated with the latter stages has received
less interest. Furthermore, the understanding of how these changes translate into
terrestrial response is difficult, due to the fragmentary nature of many terrestrial
archives.
In Britain, there are a number of sites correlated to MIS 11, including a series of long
lacustrine records, of which the upper parts, associated with the latter stages of the
interglacial, have received little attention. Those deposits which have been studied, however,
have revealed evidence for at least one stadial-interstadial event during this period (Ashton et
al., 2008, Coope and Kenward, 2007). This poster explores these terrestrial archives of MIS
11 in Britain, and discusses how they can be used to understand landscape evolution and
sub-stage climatic variability during the latter stages this interglacial. Particular focus will be
placed upon the lacustrine record of Marks Tey, eastern England, which has the potential to
be the longest and most continuous record of MIS 11 from western Europe. Data is
presented from the upper part of the lake sequence, with the preliminary results from 1)
sedimentological, 2) stable isotopic and 3) micromorphological investigation. These results
will be discussed in terms of understanding the climatic signature of MIS 11 in
terrestrial records, and the implications for lacustrine sedimentation during this
period.
References
Ashton, N., Lewis, S.G., Parfitt, S.A., Penkman, K.E.H. and Coope, G.R., (2008) New
evidence for complex climate change in MIS 11 from Hoxne, Suffolk, UK. Quaternary
Science Reviews, 27, (7-8), pp. 652-668.
Coope, G.R. and Kenward, H.K., (2007), Evidence from coleopteran assemblages for a
short but intense cold interlude during the latter part of the MIS11 Interglacial from Quinton,
West Midlands, UK. Quaternary Science Reviews, 26, (25-28), pp. 3276-3285. |
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