Preprints
https://doi.org/10.5194/acp-2020-1007
https://doi.org/10.5194/acp-2020-1007

  28 Oct 2020

28 Oct 2020

Review status: a revised version of this preprint was accepted for the journal ACP and is expected to appear here in due course.

Sea waves impact on turbulent heat fluxes in the Barents Sea according to numerical modeling

Stanislav Myslenkov1,2,3, Anna Shestakova4, and Dmitry Chechin4,5 Stanislav Myslenkov et al.
  • 1Lomonosov Moscow State University, 119991, Moscow, Russia
  • 2Shirshov Institute of Oceanology RAS, 117997, Moscow, Russia
  • 3Hydrometeorological Research Centre of the Russian Federation, 123242, Moscow, Russia
  • 4A.M.Obukhov Institute of Atmospheric Physics RAS, 119017, Moscow, Russia
  • 5Moscow Institute of Physics and Technology, 119017, Moscow, Russia

Abstract. This paper investigates the impact of sea waves on turbulent heat fluxes in the Barents Sea. The COARE algorithm, meteorological data from reanalysis and wave data from the WW3 wave model results were used. The turbulent heat fluxes were calculated using the modified Charnock parameterization for the roughness length and several parameterizations, which explicitly account for the sea waves parameters. A catalog of storm wave events and a catalog of extreme cold-air outbreaks over the Barents Sea were created and used to calculate heat fluxes during extreme events.

The important role of cold-air outbreaks in the energy exchange of the Barents Sea and the atmosphere is demonstrated. A high correlation was found between the number of cold-air outbreaks days and turbulent fluxes of sensible and latent heat, as well as with the net flux of long-wave radiation averaged over the ice-free surface of the Barents Sea during a cold season.

The differences in the long-term mean values of heat fluxes calculated using different parameterizations for the roughness length are small and are on average 1–3 % of the flux magnitude. Parameterizations of Taylor and Yelland and Oost et al. on average lead to an increase of the magnitude of the fluxes, and the parameterization of Drennan et al. leads to a decrease of the magnitude of the fluxes over the entire sea compared to the Charnock parameterization.

The magnitude of heat fluxes and their differences during the storm wave events exceed the mean values by a factor of 2. However, the effect of explicit accounting for the wave parameters is, on average, small and multidirectional, depending on the used parameterization for the roughness length. In the climatic aspect, it can be argued that the explicit accounting for sea waves in the calculations of heat fluxes can be neglected.

However, during the simultaneously observed storm waves and cold-air outbreaks, the sensitivity of the calculated values of fluxes to the used parameterizations increase along with the turbulent heat transfer increase. In some extreme cases, during storms and cold-air outbreaks, the difference reaches 700 W m−2.

Stanislav Myslenkov et al.

 
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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Stanislav Myslenkov et al.

Stanislav Myslenkov et al.

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