Inter-Basin Teleconnection of the Atlantic Multidecadal Oscillation and Interdecadal Pacific Oscillation in Modulating the Decadal Variation in Winter SST in the South China Sea

作者：Shiqiang Yao, Min Qiu, Yanyan Wang, Zhaoyun Wang, Guosheng Zhang, Wenjing Dong, Yimin Zhang, Ruili Sun · 发表于：Journal of Marine Science and Engineering · 年份：2025 · DOI：10.3390/jmse13122355 · 被引用次数：3 · 研究领域：Climate variability and models、Oceanographic and Atmospheric Processes、Tropical and Extratropical Cyclones Research

The South China Sea (SCS) sea surface temperature (SST) plays a crucial modulating effect on the climate of East Asia. While the interannual variability of South China Sea SST has been extensively examined, the decadal-scale linkages and underlying physical mechanisms between South China Sea SST and the three major ocean basins (the Atlantic, Pacific, and Indian Oceans) remain inadequately comprehended. To fill the gap, the study investigates the decadal variability of winter SST in the SCS during 1940–2023, utilizing long-term observational datasets and methods such as empirical orthogonal function decomposition, regression analysis, and teleconnections analysis. The first dominant mode of this decadal variability is characterized by basin-warming across the SCS, which is mainly driven by the Atlantic Multidecadal Oscillation (AMO, r = 0.62, p < 0.05). Specifically, the AMO imposes its remote influence on the SCS through three distinct pathways: the tropical Pacific pathway, the North Pacific pathway, and the tropical Indian Ocean pathway. These pathways collectively trigger an anomalous cyclone in the western North Pacific and SCS, and further induce basin-wide SST warming via a positive feedback that includes SST, sea level pressure, cloud cover, and longwave radiation. The second leading mode of SCS winter SST decadal variability displays a north–south dipole pattern, which is positively correlated with the Interdecadal Pacific Oscillation (IPO, r1 = 0.85, p1 < 0.05...