Journal
GEOSCIENTIFIC MODEL DEVELOPMENT
Volume 5, Issue 2, Pages 523-533Publisher
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/gmd-5-523-2012
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Funding
- Earth System Modeling (ESM)
- Statoil, Norway
- National 973 Program of China [2010CB950102]
- National Natural Science Foundation of China [40902054]
- Integrated Earth System Approach to Explore Natural Variability and Climate Sensitivity (EARTHCLIM)
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The mid-Pliocene period (3.3 to 3.0 Ma) is known as a warm climate with atmospheric greenhouse gas levels similar to the present. As the climate at this time was in equilibrium with the greenhouse forcing, it is a valuable test case to better understand the long-term response to high levels of atmospheric greenhouse gases. In this study, we use the low resolution version of the Norwegian Earth System Model (NorESM-L) to simulate the pre-industrial and the mid-Pliocene climate. Comparison of the simulation with observations demonstrates that NorESM-L simulates a realistic pre-industrial climate. The simulated mid-Pliocene global mean surface air temperature is 16.7 A degrees C, which is 3.2 A degrees C warmer than the pre-industrial. The simulated mid-Pliocene global mean sea surface temperature is 19.1 A degrees C, which is 2.0 A degrees C warmer than the pre-industrial. The warming is relatively uniform globally, except for a strong amplification at high latitudes.
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