Difference between revisions of "Baroclinic instability"

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<div class="definition"><div class="short_definition">A [[hydrodynamic instability]] arising from the existence of a [[meridional]]  temperature [[gradient]] (and hence vertical [[shear]] of the mean flow and a [[thermal wind]]) in an  [[atmosphere]] in [[quasigeostrophic equilibrium]] and possessing [[static stability]].</div><br/> <div class="paragraph">For reasonable values of the atmospheric parameters, the [[wavelength]] of maximum instability  corresponds to that of a [[synoptic-scale]] disturbance. Such a system may be interpreted as converting  [[potential energy]] of the [[basic flow]] into [[kinetic energy]] of the unstable [[perturbation]].</div><br/> </div><div class="reference">Holton, J. R. 1992. An Introduction to Dynamic Meteorology. 3d edition, Academic Press, . 228&ndash;264. </div><br/>  
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<div class="definition"><div class="short_definition">A [[hydrodynamic instability]] arising from the existence of a [[meridional]]  temperature [[gradient]] (and hence vertical [[shear]] of the mean flow and a [[thermal wind]]) in an  [[atmosphere]] in [[quasigeostrophic equilibrium]] and possessing [[static stability]].</div><br/> <div class="paragraph">For reasonable values of the atmospheric parameters, the [[wavelength]] of maximum instability  corresponds to that of a [[synoptic scale|synoptic-scale]] disturbance. Such a system may be interpreted as converting  [[potential energy]] of the [[basic flow]] into [[kinetic energy]] of the unstable [[perturbation]].</div><br/> </div><div class="reference">Holton, J. R. 1992. An Introduction to Dynamic Meteorology. 3d edition, Academic Press, . 228&ndash;264. </div><br/>  
 
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Latest revision as of 16:28, 25 April 2012



baroclinic instability

A hydrodynamic instability arising from the existence of a meridional temperature gradient (and hence vertical shear of the mean flow and a thermal wind) in an atmosphere in quasigeostrophic equilibrium and possessing static stability.

For reasonable values of the atmospheric parameters, the wavelength of maximum instability corresponds to that of a synoptic-scale disturbance. Such a system may be interpreted as converting potential energy of the basic flow into kinetic energy of the unstable perturbation.

Holton, J. R. 1992. An Introduction to Dynamic Meteorology. 3d edition, Academic Press, . 228–264.