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| Titel |
Deciphering the spatio-temporal complexity of climate change of the last deglaciation: a model analysis |
| VerfasserIn |
D. M. Roche, H. Renssen, D. Paillard, G. Levavasseur |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 7, no. 2 ; Nr. 7, no. 2 (2011-06-09), S.591-602 |
| Datensatznummer |
250004520
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| Publikation (Nr.) |
 copernicus.org/cp-7-591-2011.pdf |
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| Zusammenfassung |
| Understanding the sequence of events occuring during the last major glacial
to interglacial transition (21 ka BP to 9 ka BP) is a challenging task
that has the potential to unveil the mechanisms behind large scale climate
changes. Though many studies have focused on the understanding of the complex
sequence of rapid climatic change that accompanied or interrupted the
deglaciation, few have analysed it in a more theoretical framework with
simple forcings. In the following, we address when and where the first
significant temperature anomalies appeared when using slow varying forcing of
the last deglaciation. We used here coupled transient simulations of the last
deglaciation, including ocean, atmosphere and vegetation components to
analyse the spatial timing of the deglaciation. To keep the analysis in a
simple framework, we did not include freshwater forcings that potentially
cause rapid climate shifts during that time period. We aimed to disentangle the
direct and subsequent response of the climate system to slow forcing and
moreover, the location where those changes are more clearly expressed. In a
data – modelling comparison perspective, this could help understand the
physically plausible phasing between known forcings and recorded climatic
changes. Our analysis of climate variability could also help to distinguish
deglacial warming signals from internal climate variability. We thus are able
to better pinpoint the onset of local deglaciation, as defined by the first
significant local warming and further show that there is a large regional
variability associated with it, even with the set of slow forcings used
here. In our model, the first significant hemispheric warming occurred
simultaneously in the North and in the South and is a direct response to the
obliquity forcing. |
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