Temperature reconstruction for the Mid-Pleistocene Transition based on deep-dwelling foraminifera of IODP Site339-U1385 ...

• Main Authors: Bahr, André, Kaboth, Stefanie, Hodell, David A, Zeeden, Christian, Fiebig, Jens, Friedrich, Oliver
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2017
• Subjects: Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.882374; https://doi.pangaea.de/10.1594/PANGAEA.882374

The mid-Pleistocene Transition (MPT; approx. 1.2-0.7 Ma), is characterized by growing Northern Hemisphere ice sheets and the shift from a 41 kyr to a 100 kyr glacial-interglacial cyclicity. Concomitant to the growth of large ice sheets, atmospheric and oceanic circulation pattern have changed. One key feature of the North Atlantic is the wind-driven Subtropical Gyre, a major provider of heat and moisture for continental Europe. Here, we investigate changes in the strength and spatial configuration of the Subtropical Gyre during the MPT and its impact on the continental moisture balance.To reconstruct Subtropical Gyre dynamics, we conducted conducted paired d18O and Mg/Ca analyses on the deep-dwelling foraminifera Globorotalia inflata from Iberian Margin Site U1385 yielding thermocline temperature (Ttherm) variability between 1400-500 ka at the eastern boundary of the Subtropical Gyre.Long-term trends of Ttherm at Site U1385 oppose the North Atlantic climatic evolution of progressively intensified glacials ... : Supplement to: Bahr, André; Kaboth, Stefanie; Hodell, David A; Zeeden, Christian; Fiebig, Jens; Friedrich, Oliver (2018): Oceanic heat pulses fueling moisture transport towards continental Europe across the mid-Pleistocene transition. Quaternary Science Reviews, 179, 48-58 ...