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Institut für Physik der Atmosphäre Effect of Drop Oscillations on Polarimetric Radar Parameters Martin Hagen & Miklós Szakáll.

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Presentation on theme: "Institut für Physik der Atmosphäre Effect of Drop Oscillations on Polarimetric Radar Parameters Martin Hagen & Miklós Szakáll."— Presentation transcript:

1 Institut für Physik der Atmosphäre Effect of Drop Oscillations on Polarimetric Radar Parameters Martin Hagen & Miklós Szakáll

2 Institut für Physik der Atmosphäre Measurement of drop shapes by Miklós Szakáll (Uni Mainz) Observations in good agreement with the observations by Beard and Chung

3 Institut für Physik der Atmosphäre Oscillations of rain drops Rain drops oscillate, i.e. axis ratio varies about ± Example: drop 3.5 mm - - -circle 3.5 mm equilibrium shape 55 Hz !!

4 Institut für Physik der Atmosphäre Effect of oscillations on radar parameters Distribution of axis ratio during oscillations ? uniform Gaussian harmonic

5 Institut für Physik der Atmosphäre Effect of oscillations on radar parameters (λ 5.45 cm) depends on assumption about distribution of oscillation differences only visible in Mie resonance regime Z HH ZDR KDP Mie resonance regime static: no oscillation


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