Herbert, Timothy D.; Peterson, Laura Cleaveland; Lawrence, Kira T.; Liu Zhonghui (2010): Tropical ocean temperatures over the past 3.5 million years. American Association for the Advancement of Science, Washington, DC, United States, Science, 328 (5985), 1530-1534, georefid:2010-079022

Abstract:

Determining the timing and amplitude of tropical sea surface temperature (SST) change is an important part of solving the puzzle of the Plio-Pleistocene ice ages. Alkenone-based tropical SST records from the major ocean basins show coherent glacial-interglacial temperature changes of 1 degrees to 3 degrees C that align with (but slightly lead) global changes in ice volume and deep ocean temperature over the past 3.5 million years. Tropical temperatures became tightly coupled with benthic delta (super 18) O and orbital forcing after 2.7 million years. We interpret the similarity of tropical SST changes, in dynamically dissimilar regions, to reflect "top-down" forcing through the atmosphere. The inception of a strong carbon dioxide-greenhouse gas feedback and amplification of orbital forcing at approximately 2.7 million years ago connected the fate of Northern Hemisphere ice sheets with global ocean temperatures since that time.

Coverage:

West: -90.4906 East: 122.0000 North: 60.0000 South: -57.0000

West: NaN East: NaN North: NaN South: NaN