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| Titel |
What caused glacial abrupt climate changes? |
| VerfasserIn |
Rubén Banderas Carreño, Jorge Alvarez-Solas, Alexander Robinson, Marisa Montoya |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250096563
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| Publikation (Nr.) |
 EGU/EGU2014-12072.pdf |
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| Zusammenfassung |
| The last glacial period was punctuated by abrupt climate changes that are widely considered
to result from millennial-scale variability of the Atlantic meridional overturning circulation
(AMOC). However, the origin of these AMOC reorganizations remains poorly understood.
The climatic connection between both hemispheres suggested by proxies indicates
that the Southern Ocean (SO) could regulate this variability through changes in
winds and atmospheric CO2 concentration. Here, we investigate this hypothesis by
using a coupled climate model in an experimental setup inspired by proxy data, in
which CO2 and SO wind-stress respond to AMOC variations. The evolution of the
simulated climatic patterns matches the amplitude and timing of the largest events that
occurred during the last glacial period. Our results indicate that glacial abrupt climate
events are part of an internal interhemispheric oscillation and provide an explanation
for the pervasive Antarctic-like climate signal found in proxy records worldwide. |
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