Wave breaking on turbulent energy budget in the ocean surface mixed layer

Qun Sun; Changlong Guan; Jinbao Song

doi:10.1007/s00343-008-0009-4

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Wave breaking on turbulent energy budget in the ocean surface mixed layer

Updated：2023-05-16

- Wave breaking on turbulent energy budget in the ocean surface mixed layer
- Journal of Oceanology and Limnology Vol. 26, Issue 1, Pages: 9-13(2008)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. Physical Oceanography Laboratory Ocean University of China
- Author bio：
- Funds：
- DOI：10.1007/s00343-008-0009-4
  CLC：
- Published：2008
- Accepted：
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Sun, Q., Guan, C. & Song, J. Wave breaking on turbulent energy budget in the ocean surface mixed layer., Chin. J. Ocean. Limnol. 26, 9–13 (2008). https://doi.org/10.1007/s00343-008-0009-4
DOI：

Sun, Q., Guan, C. & Song, J. Wave breaking on turbulent energy budget in the ocean surface mixed layer., Chin. J. Ocean. Limnol. 26, 9–13 (2008). https://doi.org/10.1007/s00343-008-0009-4 DOI：

摘要

Abstract

As an important physical process at the air-sea interface

wave movement and breaking have a significant effect on the ocean surface mixed layer (OSML). When breaking waves occur at the ocean surface

turbulent kinetic energy (TKE) is input downwards

and a sublayer is formed near the surface and turbulence vertical mixing is intensively enhanced. A one-dimensional ocean model including the Mellor-Yamada level 2.5 turbulence closure equations was employed in our research on variations in turbulent energy budget within OSML. The influence of wave breaking could be introduced into the model by modifying an existing surface boundary condition of the TKE equation and specifying its input. The vertical diffusion and dissipation of TKE were effectively enhanced in the sublayer when wave breaking was considered. Turbulent energy dissipated in the sublayer was about 92.0% of the total depth-integrated dissipated TKE

which is twice higher than that of non-wave breaking. The shear production of TKE decreased by 3.5% because the mean flow fields tended to be uniform due to wave-enhanced turbulent mixing. As a result

a new local equilibrium between diffusion and dissipation of TKE was reached in the wave-enhanced layer. Below the sublayer

the local equilibrium between shear production and dissipation of TKE agreed with the conclusion drawn from the classical law-of-the-wall (Craig and Banner

1994).

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references

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