SST reconstruction from sediment cores M125-55-7/8 ...

• Main Authors: Hou, Alicia Meng Xiao, Bahr, André, Schmidt, Stefan, Strebl, Cornelia, Albuquerque, Ana Luiza Spadano, Chiessi, Cristiano Mazur, Friedrich, Oliver
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2019
• Subjects: Piston corer; M125; Meteor 1986; Alicia; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.905301; https://doi.pangaea.de/10.1594/PANGAEA.905301

The western tropical Atlantic (WTA) supplies warm and saline waters to the upper-limb of the Atlantic Meridional Overturning Circulation (AMOC) and may store excess heat and salinity during periods of AMOC slowdown. Since previous sea surface temperature (SST) reconstructions from the WTA typically focus on the Last Glacial Maximum and the last deglaciation, additional long-term records spanning several glacial-interglacial transitions are needed in order to elucidate the drivers of long-term WTA SST variability. We performed stable isotope and Mg/Ca analyses on the surface-dwelling planktonic foraminifera Globigerinoides ruber(pink) on a sediment core from the southern WTA to reconstruct surface-ocean changes over the past 322 kyr. We evaluate the relative importance of atmospheric pCO2 concentration, AMOC strength, and trade-wind intensity in driving the thermal evolution of the WTA across multiple glacial-interglacial cycles. Our SST record indicates that CO2 is the primary driver of glacial-interglacial ... : Supplement to: Hou, Alicia Meng Xiao; Bahr, André; Schmidt, Stefan; Strebl, Cornelia; Albuquerque, Ana Luiza Spadano; Chiessi, Cristiano Mazur; Friedrich, Oliver (2020): Forcing of western tropical South Atlantic sea surface temperature across three glacial-interglacial cycles. Global and Planetary Change, 188, 103150 ...