The total energy flux leaving the ocean's mixed layer

Link:
Autor/in:
Erscheinungsjahr:
2016
Medientyp:
Text
Schlagworte:
  • Circulation/Dynamics
  • Eddies
  • Fluxes
  • Inertia-gravity waves
  • Ocean circulation
  • Turbulence
  • Wind stress
  • Wind effects
  • Wind power
  • Horizontal fluxes
  • Inertia gravity waves
  • Near-inertial waves
  • Ocean general circulation models
  • Spatial structure
  • Transient fluctuations
  • Oceanography
  • air-sea interaction
  • energy flux
  • gravity wave
  • inertia
  • large eddy simulation
  • oceanic circulation
  • turbulence
  • wind stress
Beschreibung:
  • The total energy flux leaving the ocean's spatially and seasonally varying mixed layer is estimated using a global ?1/10° ocean general circulation model. From the total wind-power input of 3.33 TW into near-inertial waves (0.35 TW), subinertial fluctuations (0.87 TW), and the time-mean circulation (2.11 TW), 0.92 TW leave the mixed layer, with 0.04 TW (11.4%) due to near-inertial motions, 0.07 TW (8.04%) due to subinertial fluctuations, and 0.81 TW (38.4%) due to time-mean motions. Of the 0.81 TW from the time-mean motions, 0.5 TW result from the projection of the horizontal flux onto the sloped bottom of the mixed layer. This projection is negligible for the transient fluxes. The spatial structure of the vertical flux is determined principally by the wind stress curl. The mean and subinertial fluxes leaving the mixed layer are approximately 40%-50% smaller than the respective fluxes across the Ekman layer according to the method proposed by Stern. The fraction related to transient fluctuations tends to decrease with increasing depth of the mixed layer and with increasing strength of wind stress variability. © 2016 American Meteorological Society.
  • The total energy flux leaving the ocean's spatially and seasonally varying mixed layer is estimated using a global ?1/10° ocean general circulation model. From the total wind-power input of 3.33 TW into near-inertial waves (0.35 TW), subinertial fluctuations (0.87 TW), and the time-mean circulation (2.11 TW), 0.92 TW leave the mixed layer, with 0.04 TW (11.4%) due to near-inertial motions, 0.07 TW (8.04%) due to subinertial fluctuations, and 0.81 TW (38.4%) due to time-mean motions. Of the 0.81 TW from the time-mean motions, 0.5 TW result from the projection of the horizontal flux onto the sloped bottom of the mixed layer. This projection is negligible for the transient fluxes. The spatial structure of the vertical flux is determined principally by the wind stress curl. The mean and subinertial fluxes leaving the mixed layer are approximately 40%-50% smaller than the respective fluxes across the Ekman layer according to the method proposed by Stern. The fraction related to transient fluctuations tends to decrease with increasing depth of the mixed layer and with increasing strength of wind stress variability.
Lizenz:
  • info:eu-repo/semantics/openAccess
Quellsystem:
Forschungsinformationssystem der UHH

Interne Metadaten
Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/32e8478b-05b0-47ac-af89-d873ec451d99