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基于最新SODA资料研究了印度尼西亚贯通流(Indonesian throughflow, ITF)体积和热量输运的年代际变化, 并对其机制进行了初步探讨. 结果表明: ITF体积输运年代际变化主要产生在714m以浅, 热量输运的年代际变化主要在450m以浅. Davao南侧、新几内亚岛北侧和澳洲西北侧海域不同深度以上垂向积分海水压力年代际变化较为一致; 澳洲西北侧与Java岛南侧海域的垂直积分压力差与ITF体积输运在年代际尺度上具有最好的对应关系. 基于绕岛环流理论分析了年代际尺度上太平洋风应力与ITF体积输运的关系, 指出澳大利亚南端纬线上和赤道太平洋的纬向风应力积分是ITF年代际变化的主要贡献者, 赤道太平洋的纬向风应力积分决定了ITF年代际变化的相位. 上述结果说明热带海区的大气强迫和海洋调整过程均对ITF年代际变化有重要的贡献.
Based on the latest SODA data, the interdecadal variations of Indonesian throughflow (ITF) volume and heat transport were studied and their mechanisms were discussed. The results show that the interdecadal variations of ITF volume transport mainly occur at shallow depth of 714 m, The interdecadal variation of heat transport mainly occurs at a shallow depth of 450 m. The interdecadal variation of vertical integrated seawater pressure over the depths of Davao, New Guinea and the northwestern coast of Australia is consistent. The northwestern Australia and the south of Java Island The vertical integral pressure difference has the best correspondence with the ITF volumetric transport on the interdecadal scale.Based on the circulation theory of the circumferential island, the relationship between the Pacific wind stress and the ITF volumetric transport is analyzed, and the relationship between the southwestern tip latitude and the equator The zonal wind stress integral in the Pacific is the major contributor to the decadal change in the ITF, and the zonal wind stress integral in the equatorial Pacific determines the decadal phase of the ITF. These results indicate that both the atmospheric forcing and the ocean regulation in the tropics are sensitive to the ITF’s International change has an important contribution.