Energetics of a developing wave in the westerlies

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Lejenäs, Harald (2011)
  • Publisher: Co-Action Publishing
  • Journal: Tellus A (issn: 1600-0870, eissn: 0280-6495)
  • Related identifiers: doi: 10.3402/tellusa.v25i1.9641
  • Subject:
    arxiv: Physics::Fluid Dynamics | Physics::Atmospheric and Oceanic Physics

The terms expressing conversion between eddy kinetic and zonal kinetic energy and between eddy available and eddy kinetic energy are studied, in order to establish the contribution of barotropic and baroclinic processes respectively to the increase of eddy kinetic energy in an amplifying disturbance. After specification of initial fields the tendencies at time t = 0 are solved analytically using the quasi-geostrophic equations of motion and the ?-equation. Comparisons between this method, which depends on the specification of initial fields, and the ordinary eigen-value method are made, and it is found that the results are similar. The problem of solving the combined barotropic-baroclinic case is complicated using the eigen-value method, but investigation of the initial tendencies of the energy conversion terms gives an insight into this problem in an easy way.DOI: 10.1111/j.2153-3490.1973.tb01591.x
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