Topographic steering of dense overflows: Laboratory experiments with V-shaped ridges and canyons

Deep-Sea Research Part I: Oceanographic Research Papers

Volumn 55, Issue 8, 2008, Pages 1021-1034

  Darelius, E ^a,b  

^a UNIVERSITY OF BERGEN   (Norway)

^b BJERKNES CENTRE FOR CLIMATE RESEARCH   (Norway)

Author keywords

Dense plumes; Density current; Ekman transport; Laboratory experiments; Secondary circulation; Topographic steering

Indexed keywords

DOPPLER EFFECT; EXPERIMENTS; EXTRACTIVE METALLURGY; GRAVITATIONAL EFFECTS; GRAVITY WAVES; OFFSHORE OIL WELL PRODUCTION; VELOCIMETERS;

ANALYTICAL MODELLING; CROSS-CUTTING; DENSE LAYER; DENSE PLUMES; DENSE WATERS; DENSITY CURRENT; DOWNSLOPE; DOWNSLOPE FLOWS; DYNAMICAL REGIMES; EKMAN LAYERS; EKMAN TRANSPORT; GRAVITY CURRENTS; LABORATORY EXPERIMENTS; LASER-DOPPLER VELOCIMETER; REDUCED GRAVITY; RETURN FLOW; SECONDARY CIRCULATION; TOPOGRAPHIC STEERING; TRANSPORT CAPACITIES; VERTICAL VELOCITIES; VOLUME FLUX;

GRAVITATION;

CANYON; CIRCULATION; DENSITY CURRENT; EKMAN TRANSPORT; EXPERIMENTAL STUDY; LABORATORY METHOD; NUMERICAL MODEL; TOPOGRAPHY;

EID: 47149090523     PISSN: 09670637     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.dsr.2008.04.008     Document Type: Article

References (36)

1. Arneborg L., Fiekas V., Umlauf L., and Burchard H. Gravity current dynamics and entrainment-a process study based on observations int the Arkona basin. Journal of Physical Oceanography 37 (2007) 2094-2113
2. Baines P.G., and Condie S. Observations and modelling of antarctic downslope flows: a review. In: Jacobs S.S., and Weiss R.F. (Eds). Ocean, Ice, and Atmosphere-Interaction at the Antarctic Continental Margin vol. 75 (1998), AGU, Washington D.C
3. Borenäs K.M., and Lundberg P.A. On the deep-water flow through the Faroe Bank Channel. Journal of Geophysical Research-Oceans 93 C2 (1988) 1281-1292
4. Cenedese C., Whitehead J.A., Ascarelli T.A., and Ohiwa M. A dense current flowing down a sloping bottom in a rotating fluid. Journal of Physical Oceanography 34 1 (2004) 188-203
5. Chapman D.C., and Gawarkiewicz G. Offshore transport of dense shelf water in the presence of a submarine-canyon. Journal of Geophysical Research-Oceans 100 C7 (1995) 13373-13387
6. Cushman-Roisin B. Introduction to Geophyscial Fluid Dynamics (1994), Prentice-Hall, Upper Saddle River, NJ
7. Cushman-Roisin B., and Malacic V. Bottom Ekman pumping with stress-dependent eddy viscosity. Journal of Physical Oceanography 27 9 (1997) 1967-1975
8. Darelius E., and Wåhlin A. Downward flow of dense water leaning on a submarine ridge. Deep-Sea Research I 56 7 (2007) 1173-1188
9. Darelius, E., Smedsrud, L., Østerhus, S., Foldvik, A., Gammelsrød, T., 2008. On the structure and variability of the Filchner Overflow plume. Tellus A, in review.
10. Davies P., Wåhlin A., and Guo Y. Laboratory and analytical model studies of the FBC deep water outflow. Journal of Physical Oceanography 36 7 (2006) 1348-1364
11. Ezer T. Topographic influence on overflow dynamics: idealized numerical simulations and the Faroe Bank Channel overflow. Journal of Geophysical Research 111 C02002 (2006)
12. Foldvik A., Gammelsrød T., Østerhus S., Fahrbach E., Rohardt G., Schrøder M., Nicholls K.W., Padman L., and Woodgate R.A. Ice shelf water overflow and bottom water formation in the southern Weddell Sea. Journal of Geophysical Research-Oceans 109 C2 (2004)
13. Garrett C. Frictional processes in straits. Deep-Sea Research II 51 4-5 (2004) 393-410
14. Geyer F., Østerhus S., Hansen B., and Quadfasel D. Observations of highly regular oscillations in the overflow plume downstream of the Faroe Bank Channel. Journal of Geophysical Research 111 C12020 (2006)
15. Hogg N.G. Hydraulic control and flow separation in a multi-layered fluid with applications to the Vema Channel. Journal of Physical Oceanography 13 4 (1983) 695-708
16. Jiang L., and Garwood R.W. Effects of topographic steering and ambient stratification on overflows on continental slopes: a model study. Journal of Geophysical Research-Oceans 103 C3 (1998) 5459-5476
17. Johnson G.C., and Ohlsen D.R. Frictionally modified rotating hydraulic channel exchange and ocean outflows. Journal of Physical Oceanography 24 1 (1994) 66-78
18. Johnson G.C., and Sanford T.B. Secondary circulation in the Faroe Bank Channel Outflow. Journal of Physical Oceanography 22 8 (1992) 927-933
19. Kämpf J. Impact of multiple submarine channels on the descent of dense water at high latitudes. Journal of Geophysical Research-Oceans 105 C4 (2000) 8753-8773
20. Kämpf J. Cascading-driven upwelling in submarine canyons at high latitudes. Journal of Geophysical Research-Oceans 110 C2 (2005)
21. Mauritzen C., Price J., Sanford T., and Torres D. Circulation and mixing in the Faroese Channels. Deep-Sea Research I 52 6 (2005) 883-913
22. Ott M.W., Dewey R., and Garrett C. Reynolds stresses and secondary circulation in a stratified rotating shear flow. Journal of Physical Oceanography 32 11 (2002) 3249-3268
23. Perlin A., Moum J.N., Klymak J.M., Levine M.D., Boyd T., and Kosro P.M. Organization of stratification, turbulence, and veering in bottom Ekman layers. Journal of Geophysical Research-Oceans 112 C5 (2007)
24. Price J., and Baringer M. Outflows and deep-water production by marginal seas. Progress in Oceanography 33 3 (1994) 161-200
25. Saunders P.M. Cold outflow from the Faroe Bank Channel. Journal of Physical Oceanography 20 1 (1990) 29-43
26. Sellschopp J., Arneborg L., Knoll M., Fiekas V., Gerdes F., Burchard H., Lass H.U., Mohrholz V., and Umlauf L. Direct observations of a medium-intensity inflow into the Baltic Sea. Continental Shelf Research 26 19 (2006) 2393-2414
27. Sherwin T.J., and Turrell W.R. Mixing and advection of a cold water cascade over the Wyville Thomson Ridge. Deep-Sea Research I 52 8 (2005) 1392-1413
28. Sherwin, T., Griffiths, C., Inall, M., Turrell, W., 2008. Quantifying the overflow across the Wyville Thomson Ridge into the Rockall Trough. Deep-Sea Research I, in press, doi:10.1016/j.dsr.2007.12.006.
29. Smith P.C. A streamtube model for bottom boundary currents in the ocean. Deep-Sea Research 22 (1975)
30. Tanaka K., and Akitomo K. Baroclinic instability of density current along a sloping bottom and the associated transport process. Journal of Geophysical Research-Oceans 106 C2 (2001) 2621-2638
31. Umlauf L., Arneborg L., Burchard H., Fiekas V., Lass H.U., Mohrholz V., and Prandke H. The transverse structure of turbulence in a rotating gravity current. Geophysical Reserach Letters 34 (2007)
32. Vilibic I., Grbec B., and Supic N. Dense water generation in the North Adriatic in 1999 and its recirculation along the Jabuka Pit. Deep-Sea Research I 51 11 (2004) 1457-1474
33. Wåhlin A.K. Topographic steering of dense currents with application to submarine canyons. Deep-Sea Research I 49 2 (2002) 305-320
34. Wåhlin A.K. Downward channeling of dense water in topographic corrugations. Deep-Sea Research I 51 4 (2004) 577-590
35. Wåhlin A.K., and Walin G. Downward migration of dense bottom currents. Environmental Fluid Mechanics 1 (2001) 257-259
36. Wåhlin, A.K., Darelius, E., Cenedese, C., Lane-Serff, G., 2008. Laboratory observations of enhanced entrainment in dense overflows in the presence of submarine canyons and ridges. Deep-Sea Research I, in press, doi:10.1016/j.dsr.2008.02.007.