Mg/Ca-derived temperature estimates for ODP Site 202-1236

• Main Authors: Ronge, Thomas A, Nürnberg, Dirk, Tiedemann, Ralf
• Format: Dataset
• Language: English
• Published: PANGAEA 2018
• Subjects: 202-1236A; 202-1236B; 202-1236C; AGE; AWI_Paleo; Calculated from Mg/Ca ratios (Anand et al.; 2003); Calculated from Mg/Ca ratios (Groeneveld and Chiessi; 2011); Depth; composite; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Globorotalia inflata; Magnesium/Calcium ratio; Globorotalia tumida; Joides Resolution; Leg202; Mixed layer temperature; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Photic Zone temperature; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Sample code/label; Sea surface temperature; annual mean; South Pacific Ocean; SPP1158; Trilobatus sacculifer; Manganese/Calcium ratio; Antarc*; Antarctic; Foraminifera*; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.896166; https://doi.org/10.1594/PANGAEA.896166

Here we use Mg/Ca temperature estimates from subsurface and thermocline dwelling foraminifera to reconstruct the meridional Plio‐Pleistocene evolution of the Southeast Pacific thermocline, in relation to atmospheric circulation changes. Our data indicate a change in the thermocline, responding to the northward displacement of the Intertropical Convergence Zone/South Pacific High system between ~3.8 and 3.5 Ma. After 3.5 Ma, we record a second major phase of thermocline shoaling, which points to the ITCZ/SPH‐system movement toward its modern position along with the gradual cooling of the Northern Hemisphere and its associated glaciation.