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First observations of triple-frequency radar Doppler spectra in snowfall: Interpretation and applications

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journal contribution
posted on 24.05.2016, 12:14 by S. Kneifel, P. Kollias, Alessandro Battaglia, J. Leinonen, M. Maahn, H. Kalesse, F. Tridon
The potential of multifrequency Doppler spectra to constrain precipitation microphysics has so far only been exploited for dual-frequency spectra in rain. In this study, we extend the dual-frequency concept to triple-frequency Doppler radar spectra obtained during a snowfall event which included rimed and unrimed snow aggregates. A large selection of spectra obtained from low-turbulence regions within the cloud reveals distinctly different signatures of the derived dual spectral ratios. Due to the third frequency, a characteristic curve can be derived which is almost independent of the underlying particle size distribution and velocity-size relation. This approach provides new opportunities for validating existing and future snow scattering models and reveals how the information content of triple-frequency radar data sets can be further exploited for snowfall studies.

History

Citation

Geophysical Research Letters, 2016, 43 (5), pp. 2225-2233

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

VoR (Version of Record)

Published in

Geophysical Research Letters

Publisher

Wiley for American Geophysical Union (AGU)

issn

0094-8276

eissn

1944-8007

Copyright date

2016

Available date

24/05/2016

Publisher version

http://onlinelibrary.wiley.com/doi/10.1002/2015GL067618/abstract

Language

en