Ding Yuewen, Lin Pengfei, Liu Hailong, Wu Bo, Li Yuanlong, Chen Lin, Zhang Lei, Hu Aixue, Wang Yiming, Yao Yiyun, Zhao Bowen, Bai Wenrong, Han Weiqing
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing, 100029, China.
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
Nat Commun. 2024 May 25;15(1):4458. doi: 10.1038/s41467-024-48900-2.
The impact of interbasin linkage on the weather/climate and ecosystems is significantly broader and profounder than that of only appearing in an individual basin. Here, we reveal that a decadal linkage of sea surface temperature (SST) has emerged between western Australian coast and western-central tropical Pacific since 1985, associated with continuous intensification of decadal variabilities (8-16 years). The rapid SST changes in both tropical Indian Ocean and Indo-Pacific warm pool in association to greenhouse gases and volcanoes are emerging factors resulting in enhanced decadal co-variabilities between these two regions since 1985. These SST changes induce enhanced convection variability over the Maritime Continent, leading to stronger easterlies in the western-central tropical Pacific during the warm phase off western Australian coast. The above changes bring about cooling in the western-central tropical Pacific and strengthened Leeuwin Current and anomalous cyclonic wind off western Australian coast, and ultimately resulting in enhanced coupling between these two regions. Our results suggest that enhanced decadal interbasin connections can offer further understanding of decadal changes under future warmer conditions.
跨流域联系对天气/气候和生态系统的影响比仅出现在单个流域的影响要广泛和深刻得多。在此，我们揭示自1985年以来，澳大利亚西部海岸与热带中太平洋西部之间出现了海表温度（SST）的年代际联系，这与年代际变率（8 - 16年）的持续增强有关。热带印度洋和印太暖池与温室气体和火山相关的快速海表温度变化是自1985年以来导致这两个区域年代际协变增强的新出现因素。这些海表温度变化导致海洋大陆上空对流变率增强，使得在澳大利亚西部海岸暖期时热带中太平洋西部东风加强。上述变化导致热带中太平洋西部变冷，以及澳大利亚西部海岸的李厄温海流增强和异常气旋风，最终导致这两个区域之间的耦合增强。我们的结果表明，增强的年代际跨流域联系有助于进一步理解未来变暖条件下的年代际变化。
