Articles | Volume 15, issue 3
Clim. Past, 15, 943–955, 2019
Clim. Past, 15, 943–955, 2019

Research article 27 May 2019

Research article | 27 May 2019

Understanding the mechanisms behind high glacial productivity in the southern Brazilian margin

Rodrigo da Costa Portilho-Ramos et al.

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Short summary
Fossil microorganisms from the last glacial found in marine sediments collected off southern Brazil suggest that more productive austral summer upwelling and more frequent austral winter incursions of nutrient-rich waters from the Plata River boosted regional productivity year-round. While upwelling was more productive due to the higher silicon content from the Southern Ocean, more frequent riverine incursions were modulated by stronger alongshore southwesterly winds.