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| 1 | The Southwest Indian Ocean Thermocline Dome in CMIP5 Models:Historical Simulation and Future Projection显示文摘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. | Xiao-Tong ZHENG Lihui GAO Gen LI Yan DU | 2016 | Advances in Atmospheric Sciences2016，33，4： | 1 |
| 2 | 4个代表站点的珊瑚δ^(18)O数据对热带印度洋气候变率的反演能力分析显示文摘珊瑚中的δ^(18)O含量可以高精度地记录热带海洋中的气候变率及气候变化信息,从而弥补器测观测时间长度有限的缺陷,为反演过去长期的气候状况提供了可能。热带印度洋的气候模态通过海气相互作用影响周边区域甚至全球的气候,具有重要的研究意义。本文对比分析了1880—1999年间热带印度洋4个站点(肯尼亚、坦桑尼亚、塞舌尔、明打威)的珊瑚δ^(18)O数据,研究了其对热带印度洋气候的反演情况。结果显示,珊瑚δ^(18)O对海表温度(sea surface temperature,SST)的长期变化趋势反演良好,珊瑚δ^(18)O与局地SST在季节循环中保持一致,且在低温季节对SST的变化更为敏感。此外,4个站点的珊瑚δ^(18)O对印度洋海盆模态(Indian Ocean Basin Mode,IOBM)和印度洋偶极子模态(Indian Ocean Dipple Mode,IODM)有一定的表征能力,并且δ^(18)O记录的热带印度洋年际变率受年代际变率调制。本文的研究结果表明,珊瑚δ^(18)O数据对于了解古气候时期热带印度洋气候变率具有重要的指示意义,但同时也需要综合考虑不同站点的信息来完整地反映印度洋在历史时期的气候变化情况。 | 陈云帆 陈天然 龙上敏 陈泽生 杜岩 | 2022 | 热带海洋学报2022，41，1： | 0 |
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