基于Argo轨迹资料反演热带太平洋中层流场条带状结构特征

发布时间：2018-05-02 16:50

本文选题：热带太平洋 + 中层流场　；参考：《热带海洋学报》2017年04期

【摘要】：利用Argo浮标的轨迹资料估算热带太平洋中层纬向流场的条带状结构以及其变化特征。相较于传统温盐地转流算法,基于Argo轨迹资料的反演算法的优势在于不受零参考面的选取以及赤道地转平衡失效的局限。结果表明:在赤道太平洋海域,中层(1000dbar)纬向流场在南北半球都具有条带状分布,强流分布在赤道附近海域;在远离赤道海域,北半球(9°N、13°N、18°N)有相对赤道较弱的东向流动,而南半球东向流动相对更弱,没有同北半球一样明显的东向急流。此外,热带太平洋中层流场的时间变化特征较为复杂:近赤道流的变化以季节尺度为主,而远离赤道的流则逐渐演变为多时间尺度下的变化,海洋Rossby波的调整起到主导作用。
[Abstract]:The strip-like structure of the mid-zonal current field in the tropical Pacific Ocean and its variation characteristics are estimated by using the track data of the Argo buoy. Compared with the traditional warm salt geostrophic flow algorithm, the advantage of the inversion algorithm based on Argo trajectory data is that it is not limited by the selection of zero reference plane and the failure of equatorial geostrophic balance. The results show that in the equatorial Pacific Ocean, the zonal current field in the middle layer is zonal distribution in the northern and southern hemispheres, and the strong current is distributed in the sea near the equator, while in the northern hemisphere there is a weaker eastward flow than the equator in the waters far away from the equator (9 掳N ~ (13) 掳N ~ (18 掳N). The eastward current of the Southern Hemisphere is weaker than that of the Northern Hemisphere. In addition, the characteristics of the temporal variation of the middle current in the tropical Pacific are more complicated: the variation of the near equatorial current is mainly on the seasonal scale, while that of the current far away from the equator is gradually changing to the change of multiple time scales, and the adjustment of ocean Rossby waves plays a leading role.
【作者单位】：热带海洋环境国家重点实验室(中国科学院南海海洋研究所);中国科学院大学;中国科学院三亚深海科学与工程研究所;
【基金】：国家自然科学基金项目(41525019、41521005) 国家海洋局“全球变化与海气相互作用”专项(GASI-IPOVAI-02) 中国科学院先导专项项目(XDA11010000)~~
【分类号】：P714;P731.21

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