Session: Warm Climates (Mid-Holocene, Last interglacial, Deep-time, Pliocene)
Author: Ilana Wainer / email@example.com / University of Sao Paulo (Brazil)
Co-author: GABRIEL PONTES, UNIVERSITY OF SAO PAULO (BRAZIL);
The dominant modes of large-scale climate variability, based on sea surface temperature (SST), extend over large areas of the globe. SST-based modes have direct influence over Tropical Variability. In this work we show preliminary results for the SST-based modes of climate variability for the WAIS-free Pliocene Atlantic, Pacific and Indian oceans relative to the Pre-Industrial climate and 20th century HADISST observations. The mid-Pliocene warmer climate has been attributed to elevated CO2 concentration in the atmosphere, which makes it a perfect analogue for studying the climate at the end of the 21st century. It is the last period of Earth’s history with increased concentrations of atmospheric CO2 and global mean temperatures. Here we present the Pliocene modes of variability in the Pacific and Atlantic using a simulation of the mid-Pliocene Warm Period run with the Community Climate System Model version 4 developed at the National Center for Atmospheric Research (CCSM4-NCAR). The preliminary results show the possible changes in the variability modes in an ice-free WAIS world compares to the 20th C warming.