Surface waves affect frontogenesis
Journal Article
·
· Journal of Geophysical Research. Oceans
- Brown Univ., Providence, RI (United States)
- Univ. of Colorado, Boulder, CO (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Here, this paper provides a detailed analysis of momentum, angular momentum, vorticity, and energy budgets of a submesoscale front undergoing frontogenesis driven by an upper–ocean, submesoscale eddy field in a Large Eddy Simulation (LES). The LES solves the wave–averaged, or Craik–Leibovich, equations in order to account for the Stokes forces that result from interactions between nonbreaking surface waves and currents, and resolves both submesoscale eddies and boundary layer turbulence down to 4.9 m × 4.9 m × 1.25 m grid scales. It is found that submesoscale frontogenesis differs from traditional frontogenesis theory due to four effects: Stokes forces, momentum and kinetic energy transfer from submesoscale eddies to frontal secondary circulations, resolved turbulent stresses, and unbalanced torque. In the energy, momentum, angular momentum, and vorticity budgets for the frontal overturning circulation, the Stokes shear force is a leading–order contributor, typically either the second or third largest source of frontal overturning. These effects violate hydrostatic and thermal wind balances during submesoscale frontogenesis. The effect of the Stokes shear force becomes stronger with increasing alignment of the front and Stokes shear and with a nondimensional scaling. The Stokes shear force and momentum transfer from submesoscale eddies significantly energize the frontal secondary circulation along with the buoyancy.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1484630
- Report Number(s):
- LA-UR--15-29048
- Journal Information:
- Journal of Geophysical Research. Oceans, Journal Name: Journal of Geophysical Research. Oceans Journal Issue: 5 Vol. 121; ISSN 2169-9275
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Frontogenesis and frontal arrest of a dense filament in the oceanic surface boundary layer
Intermittent Frontogenesis in the Alboran Sea
Langmuir turbulence and filament frontogenesis in the oceanic surface boundary layer
Journal Article
·
Wed Dec 20 23:00:00 EST 2017
· Journal of Fluid Mechanics
·
OSTI ID:1538908
Intermittent Frontogenesis in the Alboran Sea
Journal Article
·
Fri Apr 30 20:00:00 EDT 2021
· Journal of Physical Oceanography
·
OSTI ID:2375559
Langmuir turbulence and filament frontogenesis in the oceanic surface boundary layer
Journal Article
·
Tue Oct 01 00:00:00 EDT 2019
· Journal of Fluid Mechanics
·
OSTI ID:1802437