Sensitivity of Pliocene climate simulations in MRI-CGCM2.3 to respective boundary conditions

• DOI: 10.5194/cp-12-1619-2016
• Publication Date: 2016-08-08T06:00:42Z
• Authors: Youichi Kamae; Kohei Yoshida; Hiroaki Ueda
• Keywords: Paleoclimatology; Forcing (mathematics)

Abstract. Accumulations of global proxy data are essential steps for improving reliability climate model simulations the Pliocene warming climate. In Model Intercomparison Project phase 2 (PlioMIP2), a part project Paleoclimate Modelling 4, boundary forcing have been updated from PlioMIP 1 due to recent advances in understanding oceanic, terrestrial and cryospheric aspects palaeoenvironment. this study, sensitivities newly archived conditions evaluated by set using an atmosphere–ocean coupled general circulation model, MRI-CGCM2.3. The simulated is warmer than pre-industrial 2.4 °C mean, corresponding 0.6 PlioMIP1 simulation identical model. Revised orography, lakes, shrunk ice sheets compared with lead local remote influences including snow sea albedo feedback, poleward heat transport atmosphere ocean that result additional over middle high latitudes. amplified higher-latitude supported qualitatively evidences, but still underestimated quantitatively. Physical processes responsible regional changes should be further addressed future studies under systematic intermodel data–model comparison frameworks.