Yang Young-Min, Park Jae-Heung, An Soon-Il, Yeh Sang-Wook, Zhu Zhiwei, Liu Fei, Li Juan, Lee June-Yi, Wang Bin
Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology, Nanjing, 210044, China.
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China.
Nat Commun. 2022 Jul 8;13(1):3978. doi: 10.1038/s41467-022-31676-8.
Over the past half a century, both the Indian Ocean (IO) and the North Atlantic Ocean (NA) exhibit strong warming trends like a global mean surface temperature (SST). Here, we show that not only simply as a result of increased greenhouse gases, but the IO-NA interaction through atmospheric teleconnection boosts up their warming trends. Climate model simulations demonstrate that the IO warming increases the NA SST by enhancing the longwave radiation through atmospheric teleconnection, subsequently, the warmer NA SST-induced atmospheric teleconnection leads to IO warming by reducing evaporative cooling with weakened surface winds. This two-way interaction (i.e., IO-NA warming chain) acts as positive feedback that reinforces warming over both ocean basins. The Pacific Ocean is partly involved in this warming chain as a modulator in an interdecadal timescale. These results highlight the importance of understanding ocean-basin interactions that may provide a more accurate future projection of warming.
在过去的半个世纪里，印度洋（IO）和北大西洋（NA）都呈现出与全球平均表面温度（SST）类似的强烈变暖趋势。在此，我们表明，印度洋 - 北大西洋的变暖趋势不仅是温室气体增加的简单结果，而且通过大气遥相关的印度洋 - 北大西洋相互作用加剧了它们的变暖趋势。气候模型模拟表明，印度洋变暖通过大气遥相关增强长波辐射，从而增加北大西洋的海表温度，随后，北大西洋海表温度升高引起的大气遥相关通过减弱表面风减少蒸发冷却导致印度洋变暖。这种双向相互作用（即印度洋 - 北大西洋变暖链）起到正反馈作用，加强了两个海洋盆地的变暖。太平洋在年代际时间尺度上作为一个调节器部分参与了这个变暖链。这些结果凸显了理解海洋盆地相互作用的重要性，这可能为未来变暖提供更准确的预测。
