δ18O and Mg/Ca thermometry in planktonic foraminifera: a multi-proxy approach towards tracing coastal upwelling dynamics ...

• Main Authors: Salgueiro, Emilia, Voelker, Antje H L, Martin, Pamela A, Rodrigues, Teresa, Zúñiga, D, Froján, María, de la Granda, Francisco, Villacieros-Robineau, Nicolás, Alonso-Perez, F, Alberto, Ana, Rebotim, Andreia, González-Álvarez, Raquel, Castro, Carmen G, Abrantes, Fatima F
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2019
• Subjects: Alkenone Uk'37 index; Mg/Ca; Planktonic foraminifera; plankton net; seasonal upwelling; δ18O; Perez; Zúñiga
• Online Access: https://dx.doi.org/10.1594/pangaea.910309; https://doi.pangaea.de/10.1594/PANGAEA.910309

Planktonic foraminifera δ18O and Mg/Ca ratios are widely considered as a powerful proxy to reconstruct past seawater-column temperature in coastal upwelling regions. Due to the complexity in the interpretation of planktonic foraminifera δ18O data with respect to past seawater temperatures, temperature determination based on the foraminifera shell Mg/Ca ratio is believed to be more accurate. However, scarce Mg/Ca calibration data exists for coastal upwelling regions, resulting in incoherent results of past seawater reconstructions. The current study along the NW Iberia coastal upwelling system intends to define the best Mg/Ca temperature equation for the most representative species of this region (Neogloboquadrina incompta, Globigerina bulloides and Globorotalia inflata). Seawater temperature from δ18O and Mg/Ca of these three planktonic foraminifera species were compared with the surface sediments alkenone derived SST, and with the in-situ temperatures measured at the depths where these foraminifera species ... : Supplement to: Salgueiro, Emilia; Voelker, Antje H L; Martin, Pamela A; Rodrigues, Teresa; Zúñiga, D; Froján, María; de la Granda, Francisco; Villacieros-Robineau, Nicolás; Alonso-Perez, F; Alberto, Ana; Rebotim, Andreia; González-Álvarez, Raquel; Castro, Carmen G; Abrantes, Fatima F (accepted): δ¹⁸O and Mg/Ca Thermometry in Planktonic Foraminifera: A Multiproxy Approach Toward Tracing Coastal Upwelling Dynamics. Paleoceanography and Paleoclimatology, 35(2) ...