World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Tidal Forcing, Energetics, and Mixing Near the Yermak Plateau : Volume 11, Issue 2 (27/03/2015)

By Fer, I.

Click here to view

Book Id: WPLBN0004020254
Format Type: PDF Article :
File Size: Pages 18
Reproduction Date: 2015

Title: Tidal Forcing, Energetics, and Mixing Near the Yermak Plateau : Volume 11, Issue 2 (27/03/2015)  
Author: Fer, I.
Volume: Vol. 11, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Müller, M., Peterson, A. K., & Fer, I. (2015). Tidal Forcing, Energetics, and Mixing Near the Yermak Plateau : Volume 11, Issue 2 (27/03/2015). Retrieved from

Description: Geophysical Institute, University of Bergen, Bergen, Norway. The Yermak Plateau (YP), located northwest of Svalbard in Fram Strait, is the final passage for the inflow of warm Atlantic Water into the Arctic Ocean. The region is characterized by the largest barotropic tidal velocities in the Arctic Ocean. Internal response to the tidal flow over this topographic feature locally contributes to mixing that removes heat from the Atlantic Water. Here, we investigate the tidal forcing, barotropic-to-baroclinic energy conversion rates, and dissipation rates in the region using observations of oceanic currents, hydrography, and microstructure collected on the southern flanks of the plateau in summer 2007, together with results from a global high-resolution ocean circulation and tide model simulation. The energetics (depth-integrated conversion rates, baroclinic energy fluxes and dissipation rates) show large spatial variability over the plateau and are dominated by the luni-solar diurnal (K1) and the principal lunar semidiurnal (M2) constituents. The volume-integrated conversion rate over the region enclosing the topographic feature is approximately 1 GW and accounts for about 50% of the M2 and approximately all of the K1 conversion in a larger domain covering the entire Fram Strait extended to the North Pole. Despite the substantial energy conversion, internal tides are trapped along the topography, implying large local dissipation rates. An approximate local conversion–dissipation balance is found over shallows and also in the deep part of the sloping flanks. The baroclinic energy radiated away from the upper slope is dissipated over the deeper isobaths. From the microstructure observations, we inferred lower and upper bounds on the total dissipation rate of about 0.5 and 1.1 GW, respectively, where about 0.4–0.6 GW can be attributed to the contribution of hot spots of energetic turbulence. The domain-integrated dissipation from the model is close to the upper bound of the observed dissipation, and implies that almost the entire dissipation in the region can be attributed to the dissipation of baroclinic tidal energy.

Tidal forcing, energetics, and mixing near the Yermak Plateau

Chapman, D. C.: Enhanced subinertial diurnal tides over isolated topographic features, Deep-Sea Res., 36, 815–824, 1989.; Alford, M. H., Cronin, M. F., and Klymak, J. M.: Annual cycle and depth penetration of wind-generated near-inertial internal waves at Ocean Station Papa in the northeast Pacific, J. Phys. Oceanogr., 42, 889–909, 2012.; Allen, S. E. and Thomson, R. E.: Bottom-trapped subinertial motions over midocean ridges in a stratified rotating fluid, J. Phys. Oceanogr., 23, 566–581, 1993.; Amante, C. and Eakins, B.: ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24. National Geophysical Data Center, NOAA, 2009.; Brink, K. H.: The effect of stratification on seamount-trapped waves, Deep-Sea Res. A., 36, 825–844, 1989.; Chen, C., Gao, G., Qi, J., Proshutinsky, A., Beardsley, R. C.and Kowalik, Z., Lin, H., and Cowles, G.: A new high-resolution unstructured-grid finite-volume Arctic Ocean model (AO-FVCOM): an application for tidal studies, J. Geophys. Res., 114, C08017, doi:10.1029/2008JC004941, 2009.; D'Asaro, E. A. and Morison, J. H.: Internal waves and mixing in the Arctic Ocean, Deep-Sea Res., 39, S459–S484, 1992.; Egbert, G. D. and Ray, R. D.: Significant dissipation of tidal energy in the deep ocean inferred from satellite altimeter data, Nature, 405, 775–778, 2000.; Eriksen, C. C.: Implications of ocean bottom reflection for internal wave spectra and mixing, J. Phys. Oceanogr., 15, 1145–1156, 1985.; Falahat, S. and Nycander, J.: On the generation of bottom-trapped internal tides, J. Phys. Oceanogr., 45, 526–545, doi:10.1175/JPO-D-14-0081.1, 2014.; Fer, I.: Scaling turbulent dissipation in an Arctic fjord, Deep-Sea Res. II, 53, 77–95, 2006.; Fer, I. and Sundfjord, A.: Observations of upper ocean boundary layer dynamics in the marginal ice zone, J. Geophys. Res., 112, C04012, doi:10.1029/2005JC003428, 2007.; Fer, I., Skogseth, R., and Geyer, F.: Internal waves and mixing in the Marginal Ice Zone near the Yermak Plateau, J. Phys. Oceanogr., 40, 1613–1630, 2010.; Foreman, M. G. G., Cherniawsky, J. Y., and Ballantyne, V. A.: Versatile harmonic tidal analysis: improvements and applications, J. Atmos. Ocean. Technol., 26, 806–817, doi:10.1175/2008jtecho615.1, 2009.; Garrett, C. and Kunze, E.: Internal tide generation in the deep ocean, Annu. Rev. Fluid Mech., 39, 57–87, 2007.; Gascard, J. C., Richez, C., and Roaualt, C.: New insights on large-scale oceanography in Fram Strait: the West Spitsbergen Current, in: Arctic oceanography, marginal ice zones and continental shelves, edited by: Smith Jr., W. O. and Grebmeier, J., vol. 49, chap. 5, 131–182, AGU, Washington D.C., USA, 1995.; Hunkins, K.: Anomalous diurnal tidal currents on the Yermak Plateau, J. Mar. Res., 44, 51–69, 1986.; Huthnance, J. M.: On the diurnal tidal currents over Rockall Bank, Deep-Sea Res., 21, 23–35, 1974.; Huthnance, J. M.: Large tidal currents near Bear Island and related tidal energy losses from the North Atlantic, Deep-Sea Res., 28A, 51–70, 1981.; Johnston, T. M. S. and Rudnick, D. L.: Trapped diurnal internal tides, propagating semidiurnal internal tides, and mixing estimates in the California Current System from sustained glider observations, 2006–2012, Deep-Sea Res. II, 112, 61–78, doi:10.1016/j.dsr2.2014.03.009, 2014.; Jungclaus, J. H., Keenlyside, N., Botzet, M., Haak, H., Luo, J. J., Latif, M., Marotzke, J., Mikolajewicz, U., and Roeckner, E.: Ocean circulation and tropical variability in the coupled model ECHAM5/MPI-OM, J. Clim., 19, 3952–3972, doi:10.1175/JCLI3827.1, 2006.; Kagan, B. A. and


Click To View

Additional Books

  • Dynamics of Turbulent Western Boundary C... (by )
  • The Mediterranean Sea System: a Review a... (by )
  • Salinity-induced Mixed and Barrier Layer... (by )
  • Investigation of Saline Water Intrusions... (by )
  • Meris-based Ocean Colour Classification ... (by )
  • Salinity in the Sicily Channel Corrobora... (by )
  • Stability and Forcing of the Iceland-far... (by )
  • An Improved Method for the Determination... (by )
  • Modeling the Effects of Size on Patch Dy... (by )
  • An Operational Implementation of the Ghe... (by )
  • Seasonality of Intermediate Waters Hydro... (by )
  • Consequences of Artificial Deepwater Ven... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.