Tuesday 13rd June 2006
Laboratoire de Météorologie Dynamique / ENS
Room 316, 3rd floor, TAO Dept.
24 rue Lhomond
75252 PARIS CEDEX 05

Seminar on Singular Vectors and Moist Physics
by Martin EHRENDORFER, Institute of Meteorology and Geophysics (Univ. of Innsbruck, Austria)

Résumé

Singular vectors (SVs) are known in meteorology as the perturbation structures that maximize a quadratic error measure while evolving over an optimization time interval subject to an initial constraint. In this talk, SVs are discussed that have been determined for 12 hour forecasts using a regional mesoscale model that includes various moist physical processes, for various initial-time and final-time norms. The final-time norms used are the usual total-energy norm as well as a measure of the squared perturbed rate of precipitation. Most importantly, results indicate that both norms are sensitive to initial perturbations of both moisture and dynamical fields. Results discussed imply that as much attention must be paid to moisture analysis as to the analysis of dynamical fields.

For more information: G. Lapeyre (G. Lapeyre email)

Link to presentation: pdf file

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