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.
First observations of triple-frequency radar Doppler spectra in snowfall: Interpretation and applications / Kneifel, S.; Kollias, P.; Battaglia, A.; Leinonen, J.; Maahn, M.; Kalesse, H.; Tridon, F.. - In: GEOPHYSICAL RESEARCH LETTERS. - ISSN 0094-8276. - 43:5(2016), pp. 2225-2233. [10.1002/2015GL067618]
|Titolo:||First observations of triple-frequency radar Doppler spectra in snowfall: Interpretation and applications|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1002/2015GL067618|
|Appare nelle tipologie:||1.1 Articolo in rivista|