Sea surface temperature estimates and alkenone C37:4 abundances in ODP Site 145-882 and 177-1090 ...

• Main Authors: Martínez‐García, Alfredo, Rosell-Melé, Antoni, McClymont, Erin L, Gersonde, Rainer, Haug, Gerald H
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2010
• Subjects: Composite Core; Piston corer BGR type; Leg145; Leg177; ANT-XI/2; Joides Resolution; Polarstern; International Polar Year 2007-2008 IPY; Ocean Drilling Program ODP; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Antarc*; Antarctic; International Polar Year; IPY
• Online Access: https://dx.doi.org/10.1594/pangaea.771708; https://doi.pangaea.de/10.1594/PANGAEA.771708

The cold upwelling 'tongue' of the eastern equatorial Pacific is a central energetic feature of the ocean, dominating both the mean state and temporal variability of climate in the tropics and beyond. Recent evidence for the development of the modern cold tongue during the Pliocene-Pleistocene transition has been explained as the result of extratropical cooling that drove a shoaling of the thermocline. We have found that the sub-Antarctic and sub-Arctic regions underwent substantial cooling nearly synchronous to the cold tongue development, thereby providing support for this hypothesis. In addition, we show that sub-Antarctic climate changed in its response to Earth's orbital variations, from a subtropical to a subpolar pattern, as expected if cooling shrank the warm-water sphere of the ocean and thus contracted the subtropical gyres. ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...