Entropy versus APE production: on the buoyancy power input in the oceans energy cycle
Tailleux, R. G. J. (2010) Entropy versus APE production: on the buoyancy power input in the oceans energy cycle. Geophysical Research Letters, 37. L22603. ISSN 0094-8276
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To link to this item DOI: 10.1029/2010GL044962
This letter argues that the current controversy about whether Wbuoyancy, the power input due to the surface buoyancy fluxes, is large or small in the oceans stems from two distinct and incompatible views on how Wbuoyancy relates to the volume-integrated work of expansion/contraction B. The current prevailing view is that Wbuoyancy should be identified with the net value of B, which current theories estimate to be small. The alternative view, defended here, is that only the positive part of B, i.e., the one converting internal energy into mechanical energy, should enter the definition of Wbuoyancy, since the negative part of B is associated with the non-viscous dissipation of mechanical energy. Two indirect methods suggest that by contrast, the positive part of B is potentially large.