The global climate is closely linked to heat distribution, and the ocean circulation plays an essential role in this interhemispheric exchange. Palaeoceanographic data allow to contextualize the ongoing and projected changes in Earth's energy budget within a long-term temporal framework providing scenarios of boundary conditions of the ocean-atmosphere system substantially different from those in the present. Although the circulation of the western South Atlantic tightly controls the meridional heat and salt transport, our knowledge about its long-term past changes is still fragmented and sparse. While many studies focused their attention on the last glacial and deglaciation periods, Holocene studies mostly lack of an integrated analysis from the subtropical and midlatitude regions.
Here, selected regionally distributed paleoceanographic records along the western South Atlantic between 27° and 39°S are analyzed for AMS 14C and stable oxygen isotope data in order to perform a paleoceanographic and paleoclimatic reconstruction of the region during the Holocene. Bayesian age models were ran on all the analyzed cores. For sediment core GeoB2701-3 we used the ages originally published in Hendry et al. (2012, doi:10.1130/G32779.1); for sediment core GeoB6211-1/2 we used the ages originally published in Chiessi et al. (2008, doi:10.1130/G24979A.1), Razik et al. (2013, doi:10.1016/j.palaeo.2012.12.022) and Chiessi et al. (2014, doi: 10.1016/j.palaeo.2013.12.005); for sediment core GeoB13862-1 we used the ages originally published in Voigt et al. (2013, doi:10.1016/j.margeo.2013.05.002); for sediment core GeoB6308-1/3 we used the ages originally published by Lantzsch et al. (2014, doi:10.1016/j.yqres.2014.01.003) and Voigt et al. (2015, doi:10.1002/2014PA002677); for sediment core GeoB2806-4 we used the ages originally published by García Chapori and Laprida (2021, doi:10.1111/let.12416); and for core SHN-T295 we performed the analyses on the samples obtain during campaign Stable isotopic analyses were performed on benthic foraminifera from four cores. For sediment core GeoB2701-3 we used the data originally published in Pereira et al. (2018, doi:10.1029/2018PA003406); for sediment core GeoB6211-1/2 we performed the analyses on the samples obtain during the campaign M46/2; for sediment core GeoB2806-4 we performed the analyses on the samples obtain during the campaign M29/2; and for core SHN-T295 we performed the analyses on the samples obtain during the campaign "Coring 2002" (RV Puerto Deseado; Argentina).
