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: Event label; Sample code/label; Depth, composite; AGE; Globorotalia inflata, Magnesium/Calcium ratio; Mixed layer temperature; Trilobatus sacculifer, Manganese/Calcium ratio; Sea surface temperature, annual mean; Globorotalia tumida, Magnesium/Calcium ratio; Photic Zone temperature; Drilling/drill rig; DSDP/ODP/IODP sample designation; Calculated from Mg/Ca ratios Groeneveld and Chiessi, 2011; Calculated from Mg/Ca ratios Anand et al., 2003; Leg202; Joides Resolution; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Arctic; Antarctic; Pacific; Antarc*; Foraminifera*; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.896166; https://doi.pangaea.de/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. ...