Interhemispheric synchrony of the last deglaciation inferred from alkenone palaeothermometry

Edouard Bard, Frauke Rostek and Corinne Sonzogni
Additional contact information
Edouard Bard: CEREGE, Université d'Aix-Marseille III et CNRS-UMR 132, Europôle de I'Arbois
Frauke Rostek: CEREGE, Université d'Aix-Marseille III et CNRS-UMR 132, Europôle de I'Arbois
Corinne Sonzogni: CEREGE, Université d'Aix-Marseille III et CNRS-UMR 132, Europôle de I'Arbois

Nature, 1997, vol. 385, issue 6618, 707-710

Abstract: Abstract The relative timings of the last deglacial warming in the Southern and Northern hemispheres are not well constrained, but are a crucial component in understanding the mechanisms of deglaciation1. A clearer picture of the degree of interhemispheric synchrony has been obscured by a dearth of high-resolution temperature records that can be tied to the absolute calendar timescale. Moreover, the quantification of tropical temperatures during the last glacial cycle is controversial2–8. Here we apply the alkenone method of sea surface temperature reconstruction9,10 to several high-resolution sediment cores recovered from the tropical Indian Ocean between 20° N and 20° S. The inferred initial sea surface temperature warming ∼15,000 calendar years ago at 20° S is in phase with Northern Hemisphere sea (this study) and air11 temperature changes, but lags Antarctic warming12–14 by several millennia. This finding, along with the results of recent modelling studies15,16, provides strong support for the idea that changes in the ocean's global thermohaline circulation were not the only cause of interhemispheric climate teleconnection during the last deglaciation.

Date: 1997
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/385707a0 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:385:y:1997:i:6618:d:10.1038_385707a0

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/385707a0

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().