Polarimetric Radar Characteristics of Melting Hail. Part III: Validation of the Algorithm for Hail Size Discrimination
نویسندگان
چکیده
منابع مشابه
Hail Detection with Polarimetric Radar
Dual-polarization radars typically transmit horizontally and vertically polarized waves and receive polarized backscattered signals. Because illuminated hydrometeors are not spherical, their radar backscatter cross sections are not the same for the two polarizations. Hydrometeor size, shape, orientation, and thermodynamic phase can be inferred from returned signals. Polarimetric hail algorithms...
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Analyses are made of the evolution of selected polarimetric radar data fields during periods immediately preceding the onset of near-surface hail indicators [high reflectivity and low differential reflectivity (Zdr)] in two nonsupercellular northeastern Colorado hailstorms. The primary data were obtained from the 11-cm-wavelength, dual-polarization Colorado State University (CSU)–University of ...
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Coincidental radar measurements and in situ ground-truth observations of large, oblate hail has allowed new insights into the fall mode of oblate hailstones. The effect of the fall mode upon hail-detection algorithms using multi-parameter radar is investigated and discussed, as is the vexed problem of extracting realistic rainfall rates in regions where hail and rain coexist. Observations prese...
متن کاملHail detection methods using radar data
Different methods for hail detection are presented in the seminar. The presented methods use radar reflectivity measurements to determine the occurrence of hail. We compared observations made on meteorological stations, radar derived product developed by Faculty of mathematics and physics (FMF) and radar derived product VIL (Vertically integrated liquid). Comparison is performed for the period ...
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Large hail is regularly observed in Belgium and The Netherlands and is sometimes the cause of severe damage on e.g. crops, greenhouses, roofs and cars. Most severe hail events occur in summer and are associated with intense thunderstorms producing large hail stones. Hail is a very local phenomenon, in time and space, which can not be easily detected with ground observational networks. Due to it...
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ژورنال
عنوان ژورنال: Journal of Applied Meteorology and Climatology
سال: 2016
ISSN: 1558-8424,1558-8432
DOI: 10.1175/jamc-d-15-0203.1