In this study, the interdecadal change in the size of the Indo-Pacific warm pool (IPWP) and its connection with the intensity of the South China Sea summer monsoon (SCSSM) in May are investigated. The results show that the size of the IPWP experienced a marked interdecadal extension in the late 1980s, and its impacts on the SCSSM have also strengthened. Further analyses indicate that interdecadal changes in the connection between the IPWP and SCSSM variations are related to the changes in the atmospheric circulation anomalies over the tropical western Pacific due to the size of the IPWP. During 1951–1986, the IPWP was smaller than the climatologic size, which led to suppressed convection over the tropical western Pacific and easterly anomalies north of the equator. The Philippines and South China Sea (SCS) region was controlled by anomalous anticyclonic circulation, which was not conducive to the formation and development of the SCSSM. In contrast, during 1987–2018, the IPWP exp...

中文翻译：

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自1980年代后期以来，印度太平洋太平洋暖池的年代际延长及其对南海夏季风的影响增强

在这项研究中，调查了印度洋太平洋暖池（IPWP）的年代际变化及其与5月南海夏季风（SCSSM）强度的关系。结果表明，IPWP的规模在1980年代后期经历了年代际扩展，并且对SCSSM的影响也得到了加强。进一步的分析表明，由于IPWP的大小，IPWP和SCSSM变化之间的年代际变化与热带西太平洋大气环流异常的变化有关。在1951年至1986年期间，IPWP小于气候规模，这导致热带西太平洋对流和赤道以北东风异常的对流受到抑制。菲律宾和南海（SCS）地区受到反气旋环流的异常控制，这不利于南海夏季风的形成和发展。相反，在1987-2018年期间，IPWP的...