The Determination of Baroclinic Tidal Energy Dissipation and Its Related Diapycnal Diffusivity as the First Step in Estimating the Role of Tidal Effects in the Formation of the Laptev Sea’s Climatic Characteristics
https://doi.org/10.7868/S2073667320040048
Abstract
To determine baroclinic tidal energy dissipation and its related diapycnal diffusivity, we have used a high-resolution version of the 3D finite-element hydrostatic model QUODDY-4, equipped with an indirect means for describing tidal effects. The latters are parameterized in the terms of a corrected (with account for diapycnal diffusion) vertical eddy diffusivity. A diapycnal diffusivity is found from the solution of an auxiliary task on dynamics of internal tidal waves (ITWs). The derived solution shows that the vertical eddy and diapycnal diffusivities have nearby orders of magnitude, that the fields of climatic characteristics in the sea are subjected to quite marked changes due to ITW-induced diapycnal diffusion and that, hence, the conclusion obtained early, concerning an important role of tidal effects in the formation of regional climates of the Barents and Kara Seas remains valid for the Laptev Sea as well.
About the Authors
B. A. Kagan
Shirshov Institute of Oceanology RAS
Russian Federation
Russian Federation
117997, Nahimovsky Pr., 36, Moscow
A. A. Timofeev
Shirshov Institute of Oceanology RAS
Russian Federation
Russian Federation
117997, Nahimovsky Pr., 36, Moscow
References
1. Kagan B.A., Sofina E.V. The spatial variability of the baroclinic tidal energy dissipation and the associated diapycnal diffusion in the Barents Sea. Oceanology. 2015, 55, 20–24. doi:10.1134/S0001437015010075
2. Kagan B.A., Sofina E.V., Timofeev A.A. The Tidal Effect on Climatic Characteristics of the Kara Sea in the Ice-Free Period. Izv. Atmos. Ocean. Phys. 2019, 55, 188–195. doi: 10.1134/S0001433819020087
3. Jayne S.R., St. Laurent L.C. Parameterizing tidal dissipation over rough topography. Geophys. Res. Lett. 2001, 28, 5, 811–814.
4. Mueller M., Haak H., Jungclaus J.H., Suendermann J., Thomas M. The effect of ocean tides on a climate model simulation. Ocean Model. 2010, 35, 4, 304–313.
5. Ip J.T.C., Lynch D.R. QUODDY-3 User’s Manual: Comprehensive coastal circulation simulation using finite elements: Nonlinear prognostic time-stepping model. Report Number NML-95–1, Thayer School of Engineering, Darthmouth College, Hanover, New Hampshire, 1995, 46 p. URL: http://www-nml.dartmouth.edu/Publications/internal_reports/NML-95-1/95-1/Q3_3.ps (дата обращения: 15.10.2020).
6. Environmental Working Group Joint US-Russian Atlas of the Arctic Ocean, Version 1. Oceanography Atlas for the summer period / Ed. by Tanis E., Timokhov L. Boulder, Colorado USA. NSIDC. 1997. doi: 10.7265/N5H12ZX4
7. Padman L., Erofeeva S. A barotropic reverse tidal model for the Arctic Ocean. Geophys. Res. Lett. 2004, 31, L02303. doi: 10.1029/2003GL019003
8. Smagorinsky J. General circulation experiments with the primitive equations. Month. Weather Rev. 1963, 91, 3, 99–164.
9. Mellor G.L., Yamada T. Development of a turbulence closure model for geophysical fluid problems. Rev. Geophys. Space Phys. 1982, 20, 4, 851–875.
10. Osborn T.R. Estimates of the local rate of vertical diffusion from dissipation measurements. J. Phys. Oceanogr. 1980, 10, 1, 83–89.
11. Kagan B.A., Timofeev A.A. Dynamics and energetics of tides in the Laptev Sea: the results of high-resolving modeling of the surface semidiurnal tide M2. Fundamentalnaya i Prikladnaya Gidrofizika. 2020, 13, 1, 15–23. doi: 10.7868/S2073667320010025 (in Russian)
12. Polzin K.L., Toole J.M., Ledwell J.R., Schmitt R.W. Spatial variability of turbulent mixing in the abyssal ocean. Science. 1997, 276, 5309, 93–96.
Review
For citations:
Kagan B.A., Timofeev A.A. The Determination of Baroclinic Tidal Energy Dissipation and Its Related Diapycnal Diffusivity as the First Step in Estimating the Role of Tidal Effects in the Formation of the Laptev Sea’s Climatic Characteristics. Fundamental and Applied Hydrophysics. 2020;13(4):39-49. (In Russ.) https://doi.org/10.7868/S2073667320040048
Views:
160
Email this article 