Flux-profile relationships: Difference between revisions
From Glossary of Meteorology
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#<div class="definition"><div class="short_definition">An equation that relates the vertical [[turbulent flux]] of a quantity to the shape or slope of the [[vertical profile]] of the [[mean value]] of that quantity, usually applied in the [[surface layer]] of the [[atmospheric boundary layer]].</div><br/> <div class="paragraph">For example, in the surface layer the [[wind speed]] increases approximately logarithmically with height, at a rate that depends on the [[friction velocity]] ''u''<sub>*</sub> and the [[Obukhov length]] ''L''. Because both these last two variables depend on surface fluxes, it is possible to find these fluxes from measurements of the mean wind [[profile]], a technique that can be easier and less costly than measuring the fluxes directly.</div><br/> </div> | #<div class="definition"><div class="short_definition">An equation that relates the vertical [[turbulent flux]] of a quantity to the shape or slope of the [[vertical profile]] of the [[mean value|mean value]] of that quantity, usually applied in the [[surface layer]] of the [[atmospheric boundary layer]].</div><br/> <div class="paragraph">For example, in the surface layer the [[wind speed]] increases approximately logarithmically with height, at a rate that depends on the [[friction velocity]] ''u''<sub>*</sub> and the [[Obukhov length]] ''L''. Because both these last two variables depend on surface fluxes, it is possible to find these fluxes from measurements of the mean wind [[profile]], a technique that can be easier and less costly than measuring the fluxes directly.</div><br/> </div> | ||
#<div class="definition"><div class="short_definition"><br/>''Same as'' [[universal functions]].</div><br/> </div> | #<div class="definition"><div class="short_definition"><br/>''Same as'' [[universal functions]].</div><br/> </div> | ||
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Latest revision as of 16:59, 25 April 2012
flux-profile relationships
- An equation that relates the vertical turbulent flux of a quantity to the shape or slope of the vertical profile of the mean value of that quantity, usually applied in the surface layer of the atmospheric boundary layer.
For example, in the surface layer the wind speed increases approximately logarithmically with height, at a rate that depends on the friction velocity u* and the Obukhov length L. Because both these last two variables depend on surface fluxes, it is possible to find these fluxes from measurements of the mean wind profile, a technique that can be easier and less costly than measuring the fluxes directly.
Same as universal functions.
