A numerical study of Stokes drift and thermal effects on the oceanic mixed layer

Numerical experiments using hybrid coordinate ocean model (HYCOM) are designed to quantify the effects of wind wave-induced Coriolis-Stokes forcing (CSF) on mixed layer (ML) dynamics in a global context. CSF calculated by the wave parameters simulated by using the WaveWatch III (WW3) model is introduced as a new driving force for HYCOM. The results show that noticeable influence on ocean circulation in ML can be caused by CSF. Over most of the global oceans the direction of Stokes transport is different from that of the change in current transport caused by CSF. This is not unusual because CSF is normal to Stokes drift. However, the CSF-caused change in current transport and the wave-induced Stokes transport have the same magnitude. The seasonal variabilities of mixed layer temperature (MLT) and mixed layer depth (MLD) caused by CSF are analyzed, and the possible relationship between them is also given.

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Application of New Parameterizations for Atmospheric Boundary Layer and Oceanic Mixed Layer to Coupled Hurricane Modeling

10.21236/ada629932 ◽

2003 ◽

Author(s):

Shuyi S. Chen ◽

William M. Frank ◽

John C. Wyngaard

Keyword(s):

Boundary Layer ◽

Atmospheric Boundary Layer ◽

Mixed Layer ◽

Oceanic Mixed Layer

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A numerical study on the role of atmospheric forcing on mixed layer depth variability in the Bay of Bengal using a regional ocean model

Ocean Dynamics ◽

10.1007/s10236-021-01475-8 ◽

2021 ◽

Author(s):

Sumit Dandapat ◽

Arun Chakraborty ◽

Jayanarayanan Kuttippurath ◽

Chirantan Bhagawati ◽

Radharani Sen

Keyword(s):

Mixed Layer ◽

Bay Of Bengal ◽

Numerical Study ◽

Mixed Layer Depth ◽

Ocean Model ◽

Atmospheric Forcing ◽

Layer Depth ◽

Regional Ocean Model

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On leakage of energy from turbulence to internal waves in the oceanic mixed layer

Ocean Dynamics ◽

10.1007/s10236-006-0100-3 ◽

2007 ◽

Vol 57 (2) ◽

pp. 151-156 ◽

Cited By ~ 5

Author(s):

Lakshmi H. Kantha ◽

Carol Anne Clayson

Keyword(s):

Internal Waves ◽

Mixed Layer ◽

Oceanic Mixed Layer

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On the numerical study of thermohydrodynamics and biochemistry of inland water bodies

10.5194/egusphere-egu21-13335 ◽

2021 ◽

Author(s):

Daria Gladskikh ◽

Evgeny Mortikov ◽

Victor Stepanenko

Keyword(s):

Mixed Layer ◽

Numerical Study ◽

Three Dimensional ◽

Water Bodies ◽

Dimensional Model ◽

Three Dimensional Model ◽

One Dimensional ◽

Lake Model ◽

Upper Mixed Layer ◽

The One

The study of thermodynamic and biochemical processes of inland water objects using one- and three-dimensional RANS numerical models was carried out both for idealized water bodies and using measurements data. The need to take into account seiche oscillations to correctly reproduce the deepening of the upper mixed layer in one-dimensional (vertical) models is demonstrated. We considered the one-dimensional LAKE model [1] and the three-dimensional model [2, 3, 4] developed at the Research Computing Center of Moscow State University on the basis of a hydrodynamic code combining DNS/LES/RANS approaches for calculating geophysical turbulent flows. The three-dimensional model was supplemented by the equations for calculating biochemical substances by analogy with the one-dimensional biochemistry equations used in the LAKE model. The effect of mixing processes on the distribution of concentration of greenhouse gases, in particular, methane and oxygen, was studied.The work was supported by grants of the RF President&#8217;s Grant for Young Scientists (MK-1867.2020.5, MD-1850.2020.5) and by the RFBR (19-05-00249, 20-05-00776).&#160;1. Stepanenko V., Mammarella I., Ojala A., Miettinen H., Lykosov V., Timo V. LAKE 2.0: a model for temperature, methane, carbon dioxide and oxygen dynamics in lakes // Geoscientific Model Development. 2016. V. 9(5). P. 1977&#8211;2006. 2. Mortikov E.V., Glazunov A.V., Lykosov V.N. Numerical study of plane Couette flow: turbulence statistics and the structure of pressure-strain correlations // Russian Journal of Numerical Analysis and Mathematical Modelling. 2019. 34(2). P. 119-132. 3. Mortikov, E.V. Numerical simulation of the motion of an ice keel in stratified flow // Izv. Atmos. Ocean. Phys. 2016. V. 52. P. 108-115. 4. Gladskikh D.S., Stepanenko V.M., Mortikov E.V. On the influence of the horizontal dimensions of inland waters on the thickness of the upper mixed layer // Water Resourses. 2021.V. 45, 9 pages. (in press)&#160;

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Oceanic wave-balanced surface fronts and filaments

Journal of Fluid Mechanics ◽

10.1017/jfm.2013.348 ◽

2013 ◽

Vol 730 ◽

pp. 464-490 ◽

Cited By ~ 40

Author(s):

James C. McWilliams ◽

Baylor Fox-Kemper

Keyword(s):

Mixed Layer ◽

Stokes Drift ◽

Surface Gravity Wave ◽

Initial Flow ◽

Coriolis Forces ◽

Flow Perturbation ◽

Front Shape ◽

Oceanic Wave ◽

Mixed Layers ◽

Layer Deformation

AbstractA geostrophic, hydrostatic, frontal or filamentary flow adjusts conservatively to accommodate a surface gravity wave field with wave-averaged, Stokes-drift vortex and Coriolis forces in an altered balanced state. In this altered state, the wave-balanced perturbations have an opposite cross-front symmetry to the original geostrophic state; e.g. the along-front flow perturbation is odd-symmetric about the frontal centre while the geostrophic flow is even-symmetric. The adjustment tends to make the flow scale closer to the deformation radius, and it induces a cross-front shape displacement in the opposite direction to the overturning effects of wave-aligned down-front and up-front winds. The ageostrophic, non-hydrostatic, adjusted flow may differ from the initial flow substantially, with velocity and buoyancy perturbations that extend over a larger and deeper region than the initial front and Stokes drift. The largest effect occurs for fronts that are wider than the mixed layer deformation radius and that fill about two-thirds of a well-mixed surface layer, with the Stokes drift spanning only the shallowest part of the mixed layer. For even deeper mixed layers, and especially for thinner or absent mixed layers, the wave-balanced adjustments are not as large.

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