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ISSN 1006-9895

CN 11-1768/O4

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LICOM3.0中太平洋北赤道逆流的模拟偏差分析
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中国科学院大气物理研究所

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国家重点研发专项2016YFC1401401和2016YFC1401601,自然科学基金面上项目41576025和41776030的共同资助


The Simulation bias Analysis of Pacific North Equatorial Countercurrent in LICOM3.0
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Chinese Academy of Sciences Institute of Atmospheric Physics

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    摘要:

    本文用CORE-IAF(Coordinated Ocean-ice Reference Experiments - Interannual Forcing)外强迫场分别强迫LICOM3(LASG/IAP Climate System Ocean Model Version 3)和POP2(Parallel Ocean Program version 2)两个海洋模式,并分析了这两个模式中太平洋北赤道逆流(NECC)的模拟结果。我们发现LICOM3和POP2模拟的NECC强度均弱于实测,这和Sun等人(2019)的研究结果一致,也进一步证明了海洋模式中NECC偏弱是外强迫场CORE-IAF造成的,海表风应力及对应的风应力旋度是海洋模式准确模拟NECC的最主要因子。同时,我们也分析了NECC的模拟在动力机制上的差别,这里的动力强迫项包括风应力项,平流项和余项。我们发现模式的外强迫场虽然相同(CORE-IAF),但是两个模式中各动力强迫项(风应力项,平流项和余项)对NECC模拟的影响并不完全相同。

    Abstract:

    In this study, the CORE-IAF (Coordinated Ocean-ice Reference Experiments - Interannual Forcing ) dataset is used to force two ocean models: LICOM3 (LASG/IAP Climate System Ocean Model Version 3) and POP2 (Parallel Ocean Program version 2). The North Equatorial Countercurrent (NECC) simulated by these two models has been found weaker than the observation. These results are consistent with the findings of Sun et al (2019), which further suggests that the surface wind stress and its curl is the most important forcing term for correctly simulating the NECC in ocean models. At the same time, the differences in NECC dynamical mechanisms between LICOM3 and POP2 are also analyzed, including the wind stress, advection and other terms. In spite of the same CORE-IAF dataset is used to force these two ocean models, the influences of dynamical forcing terms (the wind stress, advection and other terms) are not exactly same.

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  • 收稿日期:2019-03-02
  • 最后修改日期:2019-05-30
  • 录用日期:2019-07-04
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