Inter-hemispheric asymmetry in the early Pleistocene Pacific warm pool

• Published in: Geophysical Research Letters
• Main Authors: Russon, T., Elliot, M., Sadekov, A., Cabioch, Guy, Correge, T., De Deckker, Patrick
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: American Geophysical Union
• Subjects: Keywords: Coral sea; Hadley cells; Pacific warm pool; Pleistocene; Sea surface temperatures; Warm pools; Atmospheric temperature; Surface reconstruction; Lakes; asymmetry; paleoceanography; planktonic foraminifera; reconstruction; sea surface temperatu; Pacific; Planktonic foraminifera
• Online Access: http://hdl.handle.net/1885/53847; https://doi.org/10.1029/2010GL043191; https://openresearch-repository.anu.edu.au/bitstream/1885/53847/5/Inter-hemispheric_asymmetry.pdf.jpg; https://openresearch-repository.anu.edu.au/bitstream/1885/53847/7/01_Russon_Inter-hemispheric_asymmetry_in_2010.pdf.jpg

The position of the southern boundary of the Pacific warm pool is shown to have been stable since the early Pleistocene, based upon a planktic foraminiferal Mg/Ca-derived reconstruction of subtropical sea surface temperature in the Coral Sea. This contrasts with previous reconstructions showing warm pool contraction from the north and east and means that the early Pleistocene warm pool was more hemispherically asymmetric than its present configuration. The latter was not established until ∼1Ma, supporting a strengthening of the northern Hadley Cell, which was not replicated in its southern counterpart, prior to the Mid-Pleistocene Transition.