Stefan Mulitza1, Cristiano Mazur Chiessi2, Enno Schefuß1, Jörg Lippold3, David Wichmann4, Benny Antz4, Andreas Mackensen5, André Paul1, Matthias Prange1, Kira Rehfeld6, Martin Werner5, Torsten Bickert1, Norbert Frank4, Henning Kuhnert1, Jean Lynch‐Stieglitz7, Rodrigo Costa Portilho-Ramos8,1, André Oliveira Sawakuchi8, Michael Schulz1, Tilmann Schwenk1, Ralf Tiedemann5, Maximilian Vahlenkamp1, Yancheng Zhang1
1MARUM – Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
2School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, Brazil
3Institute of Earth Sciences, University of Heidelberg, Heidelberg, Germany
4Institute of Environmental Physics, University of Heidelberg, Heidelberg, Germany
5Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
6Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
7School of Earth and Atmospheric Sciences Georgia Institute of Technology Atlanta Georgia USA
8Institute of Geosciences, University of São Paulo, São Paulo, Brazil
Tóm tắt
AbstractChanges 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.
