Articles | Volume 16, issue 4
https://doi.org/10.5194/cp-16-1245-2020
https://doi.org/10.5194/cp-16-1245-2020
Research article
 | 
16 Jul 2020
Research article |  | 16 Jul 2020

Contrasting late-glacial paleoceanographic evolution between the upper and lower continental slope of the western South Atlantic

Leticia G. Luz, Thiago P. Santos, Timothy I. Eglinton, Daniel Montluçon, Blanca Ausin, Negar Haghipour, Silvia M. Sousa, Renata H. Nagai, and Renato S. Carreira

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Cited articles

Albuquerque, A. L., Meyers, P., Belem, A. L., Turcq, B., Siffedine, A., Mendoza, U., and Capilla, R.: Mineral and elemental indicators of post-glacial changes in sediment delivery and deposition under a western boundary upwelling system (Cabo Frio, southeastern Brazil), Palaeogeogr. Palaeocl., 445, 72–82, https://doi.org/10.1016/j.palaeo.2016.01.006, 2016. 
Arz, H. W., Pätzold, J., and Wefer, G.: The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil, Earth Planet. Sc. Lett., 167, 105–117, https://doi.org/10.1016/S0012-821X(99)00025-4, 1999. 
Arz, H. W., Gerhardt, S., Pätzold, J., and Röhl, U.: Millennial-scale changes of surface- and deep-water flow in the western tropical Atlantic linked to Northern Hemisphere high-latitude climate during the Holocene, Geology, 29, 239–242, https://doi.org/10.1130/0091-7613(2001)029<0239:MSCOSA>2.0.CO;2, 2001. 
Ballalai, J. M., Santos, T. P., Lessa, D. O., Venancio, I. M., Chiessi, C. M., Johnstone, H. J. H., Kuhnert, H., Claudio, M. R., Toledo, F., Costa, K. B., and Albuquerque, A. L. S.: Tracking spread of the Agulhas Leakage into the western South Atlantic and its northward transmission during the Last Interglacial,Paleoceanography and Paleoclimatology, 34, 1744–1760, https://doi.org/10.1029/2019PA003653, 2019. 
Barker, S., Diz, P., Vautravers, M. J., Pike, J., Knorr, G., Hall, I. R., and Broecker, W. S.: Interhemispheric Atlantic seesaw response during the last deglaciation, Nature, 457, 1097–1102, https://doi.org/10.1038/nature07770, 2009. 
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Two sediment cores retrieved from the SE Brazilian continental margin were studied using multiple organic (alkenones) and inorganic (oxygen isotopes in carbonate shells and water) proxies to reconstruct the sea surface temperature (SST) over the last 50 000 years. The findings indicate the formation of strong thermal gradients in the region during the last climate transition, a feature that may become more frequent in the future scenario of global water circulation changes.