Martinez-Garcia, Alfredo; Rosell-Melé, Antoni; McClymont, Erin L; Gersonde, Rainer; Haug, Gerald H (2010): Sea surface temperature estimates and alkenone C37:4 abundances in ODP Site 145-882 and 177-1090. doi:10.1594/PANGAEA.771708,
Supplement to: Martinez-Garcia, A et al. (2010): Subpolar Link to the Emergence of the Modern Equatorial Pacific Cold Tongue. Science, 328(5985), 1550-1553, doi:10.1126/Science.1184480
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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.
Median Latitude: -11.814592 * Median Longitude: 61.812058 * South-bound Latitude: -42.913617 * West-bound Longitude: 8.899817 * North-bound Latitude: 50.363300 * East-bound Longitude: 167.599800
Date/Time Start: 1992-08-05T00:00:00 * Date/Time End: 1997-12-25T00:00:00
145-882 * Latitude: 50.363300 * Longitude: 167.599800 * Date/Time Start: 1992-08-05T00:00:00 * Date/Time End: 1992-08-08T00:00:00 * Elevation: -3255.0 m * Penetration: 668.7 m * Recovery: 692.1 m * Location: North Pacific Ocean * Campaign: Leg145 * Basis: Joides Resolution * Device: Composite Core (COMPCORE) * Comment: 71 cores; 668.7 m cored; 0 m drilled; 103.5% recovery
177-1090 * Latitude: -42.913617 * Longitude: 8.899817 * Date/Time: 1997-12-25T00:00:00 * Elevation: -3701.6 m * Penetration: 936.4 m * Recovery: 874.9 m * Location: South Atlantic Ocean * Campaign: Leg177 * Basis: Joides Resolution * Device: Composite Core (COMPCORE) * Comment: 101 cores; 936.4 m cored; 0 m drilled; 93.4% recovery
PS2489-2 (PS28/256) * Latitude: -42.873300 * Longitude: 8.973300 * Date/Time: 1993-12-15T22:58:00 * Elevation: -3794.0 m * Penetration: 15 m * Recovery: 12.84 m * Location: Agulhas Ridge * Campaign: ANT-XI/2 (PS28) * Basis: Polarstern * Device: Piston corer (BGR type) (KL) * Comment: 13 core sections: 0-0.88, 0.88-1.87, 1.87-2.87, 2.87-3.86, 3.86-4.86, 4.86-5.86, 5.86-6.86, 6.86-7.86, 7.86-8.84, 8.84-9.84, 9.84-10.84, 10.84-11.84, 11.84-12.84 m