The Southwest Indian Ocean thermocline dome in CMIP5 models: Historical simulation and future projection

被引:0
|
作者
Xiao-Tong Zheng
Lihui Gao
Gen Li
Yan Du
机构
[1] Ministry of Education,Key Laboratory of Physical Oceanography
[2] and Key Laboratory of Ocean–Atmosphere Interaction and Climate in Universities of Shandong,State Key Laboratory of Tropical Oceanography
[3] Ocean University of China,undefined
[4] Qingdao Collaborative Innovation Center of Marine Science and Technology,undefined
[5] Ocean University of China,undefined
[6] South China Sea Institute of Oceanology,undefined
[7] Chinese Academy of Sciences,undefined
来源
Advances in Atmospheric Sciences | 2016年 / 33卷
关键词
SWIO thermocline dome; Indian Ocean basin mode; global warming; CMIP5; ENSO;
D O I
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中图分类号
学科分类号
摘要
Using 20 models of the Coupled Model Intercomparison Project Phase 5 (CMIP5), the simulation of the Southwest Indian Ocean (SWIO) thermocline dome is evaluated and its role in shaping the Indian Ocean Basin (IOB) mode following El Ni˜no investigated. In most of the CMIP5 models, due to an easterly wind bias along the equator, the simulated SWIO thermocline is too deep, which could further influence the amplitude of the interannual IOB mode. A model with a shallow (deep) thermocline dome tends to simulate a strong (weak) IOB mode, including key attributes such as the SWIO SST warming, antisymmetric pattern during boreal spring, and second North Indian Ocean warming during boreal summer. Under global warming, the thermocline dome deepens with the easterly wind trend along the equator in most of the models. However, the IOB amplitude does not follow such a change of the SWIO thermocline among the models; rather, it follows future changes in both ENSO forcing and local convection feedback, suggesting a decreasing effect of the deepening SWIO thermocline dome on the change in the IOB mode in the future.
引用
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页码:489 / 503
页数:14
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