Estimates of Arctic land surface temperatures during the early Pliocene from two novel proxies

Csank, Adam Z; Tripati, Aradhna K; Patterson, William P; Eagle, Robert A; Rybczynski, Natalia; Ballantyne, Ashley P.; Eiler, John M

doi:10.1016/j.epsl.2011.02.030

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Estimates of Arctic land surface temperatures during the early Pliocene from two novel proxies

Author(s): Adam Z. Csank , Aradhna K. Tripati , William P. Patterson , Robert A. Eagle , Natalia Rybczynski , Ashley P. Ballantyne , John M. Eiler

Publication date Created: April 2011

Publication date (Print): April 2011

Journal: Earth and Planetary Science Letters

Publisher: Elsevier BV

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Cenozoic deep-Sea temperatures and global ice volumes from Mg/Ca in benthic foraminiferal calcite

Lear, Elderfield, Wilson (2000)

A deep-sea temperature record for the past 50 million years has been produced from the magnesium/calcium ratio (Mg/Ca) in benthic foraminiferal calcite. The record is strikingly similar in form to the corresponding benthic oxygen isotope (delta(18)O) record and defines an overall cooling of about 12 degrees C in the deep oceans with four main cooling periods. Used in conjunction with the benthic delta(18)O record, the magnesium temperature record indicates that the first major accumulation of Antarctic ice occurred rapidly in the earliest Oligocene (34 million years ago) and was not accompanied by a decrease in deep-sea temperatures.