2024-03-28T11:49:00Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00039504
2022-04-27T09:09:40Z
160:1252
160:5286
3:62:5298:5302
Sensitivity of Pliocene climate simulations in MRI-CGCM2.3 to respective boundary conditions
釜江, 陽一
植田, 宏昭
Kamae, Youichi
Yoshida, Kohei
Ueda, Hiroaki
© Author(s) 2016. CC Attribution 3.0 License.
Accumulations of global proxy data are essential steps for improving reliability of climate model simulations for the Pliocene warming climate. In the Pliocene Model Intercomparison Project phase 2 (PlioMIP2), a part project of the Paleoclimate Modelling Intercomparison Project phase 4, boundary forcing data have been updated from the PlioMIP phase 1 due to recent advances in understanding of oceanic, terrestrial and cryospheric aspects of the Pliocene palaeoenvironment. In this study, sensitivities of Pliocene climate simulations to the newly archived boundary conditions are evaluated by a set of simulations using an atmosphere–ocean coupled general circulation model, MRI-CGCM2.3. The simulated Pliocene climate is warmer than pre-industrial conditions for 2.4 °C in global mean, corresponding to 0.6 °C warmer than the PlioMIP1 simulation by the identical climate model. Revised orography, lakes, and shrunk ice sheets compared with the PlioMIP1 lead to local and remote influences including snow and sea ice albedo feedback, and poleward heat transport due to the atmosphere and ocean that result in additional warming over middle and high latitudes. The amplified higher-latitude warming is supported qualitatively by the proxy evidences, but is still underestimated quantitatively. Physical processes responsible for the global and regional climate changes should be further addressed in future studies under systematic intermodel and data–model comparison frameworks.
Copernicus Publications
2016-08
eng
journal article
http://hdl.handle.net/2241/00144171
https://tsukuba.repo.nii.ac.jp/records/39504
10.5194/cp-12-1619-2016
1814-9324
Climate of the past
12
8
1619
1634
https://tsukuba.repo.nii.ac.jp/record/39504/files/CP_12-8.pdf
application/pdf
2.1 MB
2016-10-24