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Venancio, Igor Martins; Shimizu, Marilia Harumi; Santos, Thiago Pereira dos; Lessa, Douglas O; Dias, Bruna Borba; Chiessi, Cristiano Mazur; Mulitza, Stefan; Kuhnert, Henning; Tiedemann, Ralf; Vahlenkamp, Maximilian; Bickert, Torsten; Belem, Andre L; Sampaio, Gilvan; Albuquerque, Ana Luiza Spadano; Nobre, Carlos (2021): High-resolution SST records derived from planktonic foraminiferal Mg/Ca from the western equatorial Atlantic [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.931646

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Published: 2021-05-18 • DOI registered: 2021-08-17

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Abstract:
Slowdowns of the Atlantic meridional overturning circulation during Heinrich stadials (HS) caused reductions in cross-equatorial heat transport, southward shifts of the Intertropical Convergence Zone and intensification of precipitation over eastern tropical South America. While these changes are well described, the associated spatial sea surface temperature (SST) patterns are still unclear. Here, we analyze proxy data to assess changes in ocean atmosphere interactions during HS over the western South Atlantic. Our SST proxy records show contrasting patterns between the tropical (warming) and the subtropical (no change) western South Atlantic during HS. We propose that the distinct SST behavior in the subtropics was associated with the cloud cover effect of the South Atlantic Convergence Zone over the upper ocean.
Keyword(s):
Atlantic; Brazil; Foraminifera; Heinrich Stadials; ITCZ; Mg/Ca; South America
Supplement to:
Venancio, Igor Martins; Shimizu, Marilia Harumi; Santos, Thiago Pereira dos; Lessa, Douglas O; Dias, Bruna Borba; Chiessi, Cristiano Mazur; Mulitza, Stefan; Kuhnert, Henning; Tiedemann, Ralf; Vahlenkamp, Maximilian; Bickert, Torsten; Belem, Andre L; Sampaio, Gilvan; Albuquerque, Ana Luiza Spadano; Nobre, Carlos (2020): Ocean-atmosphere interactions over the western South Atlantic during Heinrich stadials. Global and Planetary Change, 195, 103352, https://doi.org/10.1016/j.gloplacha.2020.103352
Coverage:
Median Latitude: -1.414167 * Median Longitude: -42.496667 * South-bound Latitude: -1.908333 * West-bound Longitude: -43.401667 * North-bound Latitude: -0.920000 * East-bound Longitude: -41.591667
Date/Time Start: 2012-02-22T15:41:00 * Date/Time End: 2012-02-22T15:41:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets

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Datasets listed in this bundled publication

  1. Venancio, IM; Shimizu, MH; Santos, TP et al. (2021): Mg/Ca-ratios and SST records of sediment core GeoB16202-2. https://doi.org/10.1594/PANGAEA.931644
  2. Venancio, IM; Shimizu, MH; Santos, TP et al. (2021): Mg/Ca-ratios and SST records of sediment core GL-1248. https://doi.org/10.1594/PANGAEA.931645