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Last Interglacial and Early Glacial ENSO

Published online by Cambridge University Press:  20 January 2017

George J. Kukla ,
Amy C. Clement ,
Mark A. Cane ,
Joyce E. Gavin  and
Stephen E. Zebiak
George J. Kukla*
Affiliation:
Lamont-Doherty Earth Observatory, Palisades, New York, 10964
Amy C. Clement
Affiliation:
RSMAS, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida, 33149
Mark A. Cane
Affiliation:
Lamont-Doherty Earth Observatory, Palisades, New York, 10964
Joyce E. Gavin
Affiliation:
Lamont-Doherty Earth Observatory, Palisades, New York, 10964
Stephen E. Zebiak
Affiliation:
International Research Institute for Climate Prediction, Palisades, New York, 10964
*
1To whom correspondence should be addressed. [email protected].
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Abstract

Although the link between insolation and climate is commonly thought to be in the high northern latitudes in summer, our results show that the start of the last glaciation in marine isotope stage (MIS) 5d was associated with a change of insolation during the transitional seasons in the low latitudes. A simplified coupled ocean-atmosphere model shows that changes in the seasonal cycle of insolation could have altered El Niño Southern Oscillation (ENSO) variability so that there were almost twice as many warm ENSO events in the early glacial than in the last interglacial. This indicates that ice buildup in the cooled high latitudes could have been accelerated by a warmed tropical Pacific.

Keywords

ENSOinsolationglacial startequatorial Pacific
Type
Research Article
Information
Quaternary Research , Volume 58 , Issue 1 , July 2002 , pp. 27 - 31
Copyright
University of Washington

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