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Lessa, Douglas Villela de Oliveira; Santos, Thiago Pereira dos; Venancio, Igor Martins; Santarosa, Ana Cláudia Aoki; Santos Junior, Edmundo C; Toledo, Felipe Antonio de L; Costa, Karen B; Albuquerque, Ana Luiza Spadano (2019): Globigerinoides ruber, Globigerina bulloides and MAT derived paleotemperatures for the lasts 772 kyr from cores GL-852 and GL-854 (Santos Basin, Southwest Atlantic) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.901799, Supplement to: Lessa, Douglas Villela de Oliveira; Santos, Thiago Pereira dos; Venancio, Igor Martins; Santarosa, Ana Claudia A; dos Santos Junior, Edmundo C; Toledo, Felipe A L; Costa, Karen B; Albuquerque, Ana Luiza Spadano (2019): Eccentricity-induced expansions of Brazilian coastal upwelling zones. Global and Planetary Change, 179, 33-42, https://doi.org/10.1016/j.gloplacha.2019.05.002

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Abstract:
Expansions of coastal upwelling spots along the Brazilian coast were previously reported for Marine Isotope Stage (MIS) 5, but open questions remain regarding the climatic mechanisms and the periodicity of such changes. Based on two marine sediment cores, we provide evidence for multiple intensifications of the upwelling regime off the Southeast Brazilian margin (SBM) during several interglacials and highlight the major role of eccentricity as the responsible forcing. In addition, we show a two-step change in the upwelling regime across the Mid-Brunhes Event (MBE) and an increase in the amplitude of upwelling variability after this climatic transition. Our findings point to substantial modifications of the upwelling regions during several glacial-interglacial transitions that probably altered the regional marine productivity regime and the carbon budget.
Keyword(s):
Milankovitch cycles; Paleoceanography; Planktonic foraminifera; Pleistocene; Southwest Atlantic Ocean
Coverage:
Median Latitude: -25.108350 * Median Longitude: -43.083350 * South-bound Latitude: -25.200000 * West-bound Longitude: -43.550000 * North-bound Latitude: -25.016700 * East-bound Longitude: -42.616700
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Lessa, DVO; Santos, TP; Venancio, IM et al. (2019): Globigerinoides ruber, Globigerina bulloides and MAT derived paleotemperatures sediment core GL-852 from Santos Basin, Southwest Atlantic. https://doi.org/10.1594/PANGAEA.901796
  2. Lessa, DVO; Santos, TP; Venancio, IM et al. (2019): Globigerinoides ruber, Globigerina bulloides and MAT derived paleotemperatures sediment core GL-854 from Santos Basin, Southwest Atlantic. https://doi.org/10.1594/PANGAEA.901798