Peng Qihua, Xie Shang-Ping, Wang Dongxiao, Huang Rui Xin, Chen Gengxin, Shu Yeqiang, Shi Jia-Rui, Liu Wei
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093, USA.
Sci Adv. 2022 Apr 22;8(16):eabj8394. doi: 10.1126/sciadv.abj8394. Epub 2022 Apr 20.
How the ocean circulation changes in a warming climate is an important but poorly understood problem. Using a global ocean model, we decompose the problem into distinct responses to changes in sea surface temperature, salinity, and wind. Our results show that the surface warming effect, a robust feature of anthropogenic climate change, dominates and accelerates the upper ocean currents in 77% of the global ocean. Specifically, the increased vertical stratification intensifies the upper subtropical gyres and equatorial currents by shoaling these systems, while the differential warming between the Southern Ocean upwelling zone and the region to the north accelerates surface zonal currents in the Southern Ocean. In comparison, the wind stress and surface salinity changes affect regional current systems. Our study points a way forward for investigating ocean circulation change and evaluating the uncertainty.
在气候变暖的情况下，海洋环流如何变化是一个重要但却知之甚少的问题。我们使用一个全球海洋模型，将该问题分解为对海表温度、盐度和风变化的不同响应。我们的结果表明，表面变暖效应作为人为气候变化的一个显著特征，在全球77%的海洋中主导并加速了上层洋流。具体来说，垂直分层的增加通过使这些系统变浅而强化了上层亚热带环流和赤道洋流，而南大洋上升流区与北部区域之间的差异变暖加速了南大洋的表面纬向洋流。相比之下，风应力和表面盐度变化影响区域洋流系统。我们的研究为研究海洋环流变化和评估不确定性指明了一条前进的道路。
