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Detailed Reference Information |
McGinnis, D.F., Lorke, A., Wüest, A., Stöckli, A. and Little, J.C. (2004). Interaction between a bubble plume and the near field in a stratified lake. Water Resources Research 40: doi: 10.1029/2004WR003038. issn: 0043-1397. |
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A steady state bubble-plume model is evaluated using full-scale temperature, salinity, and dissolved oxygen data collected in a Swiss lake. The data revealed a plume-generated near-field environment that differed significantly from the ambient far-field water column properties. A near-field torus of reduced stratification developed around the plume, the extent of which is on the same lateral scale as the horizontal dislocations generated by persistent first-mode seiching. The plume fallback water was found to penetrate much deeper than expected, thereby maintaining reduced vertical gradients in the near-field torus. The plume entrains a portion of the fallback water leading to short-circuiting, which generates a complex plume-lake interaction and reduces far-field downwelling relative to the upward plume flow. As the integral plume model incorporates the entrainment hypothesis, it is highly sensitive to the near-field environmental conditions. After identifying appropriate near-field boundary conditions the plume model predictions agree well with the field observations. |
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Abstract |
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Keywords
Oceanography, Physical, Turbulence, diffusion, and mixing processes, Hydrology, Limnology, Hydrology, Reservoirs (surface), Hydrology, Surface water quality, aeration, bubble plume, buoyancy, hypolimnion, oxygen transfer, reservoir |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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