Synchronous and proportional deglacial changes in Atlantic meridional overturning and northeast Brazilian precipitation.

Mulitza, Stefan, Chiessi, Cristiano M., Schefuß, Enno, Lippold, Jörg, Wichmann, David, Antz, Benny, Mackensen, Andreas, Paul, André, Prange, Matthias, Rehfeld, Kira, Werner, Martin, Bickert, Torsten, Frank, Norbert, Kuhnert, Henning, Lynch-Stieglitz, Jean, Portilho-Ramos, Rodrigo C., Sawakuchi, André O., Schulz, Michael, Schwenk, Tilmann, Tiedemann, Ralf, Vahlenkamp, Maximilian and Zhang, Yancheng (2017) Synchronous and proportional deglacial changes in Atlantic meridional overturning and northeast Brazilian precipitation. Open Access Paleoceanography, 32 (6). pp. 622-633. DOI 10.1002/2017PA003084.

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Abstract

Changes in heat transport associated with fluctuations in the strength of the Atlantic meridional overturning circulation (AMOC) are widely considered to affect the position of the Intertropical Convergence Zone (ITCZ), but the temporal immediacy of this teleconnection has to date not been resolved. Based on a high‐resolution marine sediment sequence over the last deglaciation, we provide evidence for a synchronous and near‐linear link between changes in the Atlantic interhemispheric sea surface temperature difference and continental precipitation over northeast Brazil. The tight coupling between AMOC strength, sea surface temperature difference, and precipitation changes over northeast Brazil unambiguously points to a rapid and proportional adjustment of the ITCZ location to past changes in the Atlantic meridional heat transport.

Document Type: Article
Keywords: Atlantic meridional overturning circulation; Intertropical Convergence Zone; deglaciation; continental precipitation; northeast Brazil; sea surface temperature
Research affiliation: AWI
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1002/2017PA003084
ISSN: 0883-8305
Projects: PalMod in-kind, REKLIM
Date Deposited: 12 Sep 2018 12:52
Last Modified: 23 Sep 2019 19:17
URI: http://oceanrep.geomar.de/id/eprint/44259

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