Seasonal variability of the upper ocean on meso- and submesoscales is investigated in the framework of the quasi-normal scale elimination theory, or QNSE. The longitudinal and transverse velocity spectra in this theory have a bi-component structure comprised of the Coriolis and Kolmogorov-like branches that are identified with meso- and submesoscales, respectively. For the former, spectral amplitudes are determined by the Coriolis parameter, f, while for the latter, the amplitudes are quantified in terms of the energy flux, π_ε, proceeding from larger to smaller scales. This flux can be identified with the effective submesoscale dissipation. The Kolmogorov and Coriolis subranges are delineated at a length scale L_c that marks a crossover between the respective spectra. The theoretical spectra agree well with those obtained in many observational campaigns. In phase with the seasonal variations of the intensities of instabilities and turbulence, the magnitudes of π_ε and L_c increase in winter and decrease in summer. Mirroring these changes, the bi-component structure of the kinetic energy spectra changes with seasons and renders meaningless the characterization of their seasonal variability in terms of a single slope. The theoretical results are validated against the data collected in Oleander, LatMix and North-Western Pacific observations.

在准正尺度消灭理论（QNSE）的框架内，研究了中，亚中尺度上的上层海洋的季节变化。在该理论中，纵向和横向速度谱具有双组分结构，该结构由科里奥利（Coriolis）和柯尔莫哥洛夫（Kolmogorov）样分支组成，分别用中尺度和亚尺度确定。对于前者，频谱幅值由科里奥利参数，F确定，而对于后者来说，振幅被在能量通量，来定量π _ε，从较大前进到较小尺度。该通量可以通过有效的亚中尺度耗散来识别。以长度刻度L _c描绘了Kolmogorov和Coriolis子范围这标志着各个光谱之间的交叉。理论光谱与在许多观测活动中获得的光谱非常吻合。在具有不稳定性和湍流，的大小的强度的季节性变化相π _ε和大号_Ç在夏季，冬季和减小增加。反映这些变化，动能谱的双组分结构随季节而变化，从而使它们的季节变化特性（以单一斜率表示）变得毫无意义。该理论结果根据在夹竹桃，LatMix和西北太平洋观测中收集的数据进行了验证。