Surface Kinetic Energy Distributions in the Global Oceans From a High‐Resolution Numerical Model and Surface Drifter Observations
Surface Kinetic Energy Distributions in the Global Oceans From a High‐Resolution Numerical Model and Surface Drifter Observations
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DOI：
10.1029/2019gl083074
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发表时间：
2019-08
影响因子：
5.2
通讯作者：
Xiaolong Yu;A. Ponte;S. Elipot;D. Menemenlis;E. Zaron;R. Abernathey
中科院分区：
文献类型：
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作者：
Xiaolong Yu;A. Ponte;S. Elipot;D. Menemenlis;E. Zaron;R. Abernathey
将1/48°全球海洋模拟的表面动能及其作为频率和位置函数的分布与全球分布的15，329个表面漂流物观测的每小时分辨率估计的表面动能进行了比较。这些分布遵循类似的模式，具有主导的低频分量和明确定义的潮汐和近惯性峰值。定量差异被确定为赤道附近（因子2）和近惯性频率（因子3）的低频能量不足以及模型半日频率（因子4）的能量过剩。由于其每小时的分辨率和近全球的空间覆盖范围，表面漂移阵列是一个宝贵的工具，以评估在观测系统模拟实验中使用的潮汐分辨高分辨率海洋模拟的真实性。模型和漂流数据之间的偏见的来源进行了讨论，并为今后的工作突出相关的线索。
The surface kinetic energy of a 1/48° global ocean simulation and its distribution as a function of frequency and location are compared with the one estimated from 15,329 globally distributed surface drifter observations at hourly resolution. These distributions follow similar patterns with a dominant low‐frequency component and well‐defined tidal and near‐inertial peaks globally. Quantitative differences are identified with deficits of low‐frequency energy near the equator (factor 2) and at near‐inertial frequencies (factor 3) and an excess of energy at semidiurnal frequencies (factor 4) for the model. Owing to its hourly resolution and its near‐global spatial coverage, the array of surface drifters is an invaluable tool to evaluate the realism of tide‐resolving high‐resolution ocean simulations used in observing system simulation experiments. Sources of bias between model and drifter data are discussed, and associated leads for future work highlighted.