Global finestructure estimates of internal wave energy levels and wave-induced mixing from Argo float profiles

Global estimates of internal wave energy levels E (m^2/s^2), turbulent kinetic energy (TKE) dissipation rates epsilon (W/kg), buoyancy frequency N^2 (1/s^2), and vertical diffusivity kappa (m^2/s), averaged in the three depth ranges 300-500 m, 500-1000 m and 1000-2000 m. The estimates are obtained by applying the finestructure method to vertical CTD profiles collected by Argo floats in the ocean's upper 2000 m. The methodology is the same as detailed in Pollmann et al., 2017 („Evaluating the global internal wave model IDEMIX using finestructure methods", J. Phys. Oc.), but compared to the original publication, this data set covers 6 years more of Argo input data (2006-2021). The estimates are binned into 1.5°x1.5° horizontal bins, defined such that E(i,j) is energy representative of the bin bounded by lon(i),lon(i+1),lat(j),lat(j+1).

本数据集提供全球范围内的内波能级E（单位：m²/s²）、湍流动能（Turbulent Kinetic Energy，TKE）耗散率ε（单位：W/kg）、浮力频率N²（单位：1/s²）以及垂直扩散系数κ（单位：m²/s）的估算值，所有参数均在300~500 m、500~1000 m与1000~2000 m三个深度区间内取平均。该估算通过将精细化结构法（finestructure method）应用于Argo浮标（Argo floats）在海洋上层2000 m范围内采集的垂直温盐深（Conductivity-Temperature-Depth，CTD）剖面数据得到。本数据集所采用的方法与Pollmann等人2017年发表的研究（"Evaluating the global internal wave model IDEMIX using finestructure methods"，发表于《物理海洋学杂志（Journal of Physical Oceanography，J. Phys. Oc.）》）一致，但相较于原始研究，本数据集新增了6年的Argo输入数据，时间覆盖范围为2006~2021年。所有估算值均被划分为1.5°×1.5°的水平分箱单元，其中E(i,j)代表以经度lon(i)、lon(i+1)与纬度lat(j)、lat(j+1)为边界的分箱单元对应的内波能级。