期刊
ADVANCES IN ATMOSPHERIC SCIENCES
卷 33, 期 4, 页码 433-441出版社
SCIENCE PRESS
DOI: 10.1007/s00376-015-5184-6
关键词
global warming; equatorial Pacific SST warming pattern; multi-model ensemble; CMIP5
资金
- National Basic Research Program of China [2014CB953903, 2012CB955604]
- National Natural Science Foundation of China [41575088, 41461164005]
Based on the historical and RCP8.5 runs of the multi-model ensemble of 32 models participating in CMIP5, the present study evaluates the formation mechanisms for the patterns of changes in equatorial Pacific SST under global warming. Two features with complex formation processes, the zonal El NiEeno-like pattern and the meridional equatorial peak warming (EPW), are investigated. The climatological evaporation is the main contributor to the El NiEeno-like pattern, while the ocean dynamical thermostat effect plays a comparable negative role. The cloud-shortwave-radiation-SST feedback and the weakened Walker circulation play a small positive role in the El NiEeno-like pattern. The processes associated with ocean dynamics are confined to the equator. The climatological evaporation is also the dominant contributor to the EPW pattern, as suggested in previous studies. However, the effects of some processes are inconsistent with previous studies. For example, changes in the zonal heat advection due to the weakened Walker circulation have a remarkable positive contribution to the EPW pattern, and changes in the shortwave radiation play a negative role in the EPW pattern.
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