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The interdecadal variation of Indonesian Throughflow and its mechanism

机译:印尼流量的年代际变化及其机理

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The interdecadal variation of the volume and heat transport of Indonesian Throughflow (ITF) and its mechanism are preliminarily studied on the basis of the updated SODA data. It is found that the interdecadal variation of ITF's volume transport is mainly concentrated in upper 714 m and that of ITF's heat transport is mainly confined to upper 450 m. There is fairly consistent interdecadal variation in the depth-integrated seawater pressure above different depths in the region south of Davao, north ofNew Guinea and southwest of Australia. The depth-integrated pressure difference between northwest of Australia and south of Java has best correspondence with ITF's volume transport on interdecadal time scales. The relation between the wind stress on thePacific and ITF's volume transport on interdecadal time scales is studied based on Island Rule. It is shown that both the wind stress along the zonal lines just south of Australia and the Equator act as the dominant contributors to ITF's volume transport, with the latter dominating the phase of ITF's interdecadal variation. These results indicate that the atmospheric forcing and oceanic adjustment in the tropical region both contribute significantly to the ITF's interdecadal variation.
机译:在更新的SODA数据的基础上,初步研究了印尼流量(ITF)的量和热传输的年代际变化及其机理。研究发现,ITF体积输送的年代际变化主要集中在上部714 m处,而ITF热量输送的年代际变化主要限于450 m以上。在达沃以南,新几内亚以北和澳大利亚西南部,不同深度以上的深度综合海水压力存在相当一致的年代际变化。澳大利亚的西北部与爪哇省南部之间的深度综合压力差与ITF在年代际时间尺度上的体积输运关系最为吻合。基于Island Rule研究了太平洋风应力与ITF在年代际尺度上的体积输运之间的关系。结果表明,澳大利亚南部地带的风应力和赤道都是ITF体积传输的主要因素,后者主导了ITF年代际变化的阶段。这些结果表明,热带地区的大气强迫和海洋调节都对ITF年代际变化做出了重要贡献。

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