Estimation of Rainfall Based on the Results of Polarimetric Echo Classification
- 1 September 2008
- journal article
- Published by American Meteorological Society in Journal of Applied Meteorology and Climatology
- Vol. 47 (9), 2445-2462
- https://doi.org/10.1175/2008jamc1753.1
Abstract
The quality of polarimetric radar rainfall estimation is investigated for a broad range of distances from the polarimetric prototype of the Weather Surveillance Radar-1988 Doppler (WSR-88D). The results of polarimetric echo classification have been integrated into the study to investigate the performance of radar rainfall estimation contingent on hydrometeor type. A new method for rainfall estimation that capitalizes on the results of polarimetric echo classification (EC method) is suggested. According to the EC method, polarimetric rainfall relations are utilized if the radar resolution volume is filled with rain (or rain and hail), and multiple R(Z) relations are used for different types of frozen hydrometeors. The intercept parameters in the R(Z) relations for each class are determined empirically from comparisons with gauges. It is shown that the EC method exhibits better performance than the conventional WSR-88D algorithm with a reduction by a factor of 1.5–2 in the rms error of 1-h rainfall estimates up to distances of 150 km from the radar.Keywords
This publication has 39 references indexed in Scilit:
- Local Random Errors in Tipping-Bucket Rain Gauge MeasurementsJournal of Atmospheric and Oceanic Technology, 2003
- Radar observations of the kinematic, microphysical, and precipitation characteristics of two MCSs in TRMM LBAJournal of Geophysical Research: Solid Earth, 2002
- Experiments in Rainfall Estimation with a Polarimetric Radar in a Subtropical EnvironmentJournal of Applied Meteorology and Climatology, 2002
- Polarimetric Doppler Weather RadarPublished by Cambridge University Press (CUP) ,2001
- The Oklahoma Mesonet: A Technical OverviewJournal of Atmospheric and Oceanic Technology, 1995
- Identification of Vertical Profiles of Radar Reflectivity for Hydrological Applications Using an Inverse Method. Part I: FormulationJournal of Applied Meteorology and Climatology, 1995
- Optimization of Multiparameter Radar Estimates of RainfallJournal of Applied Meteorology and Climatology, 1993
- Error Structure of Multiparameter Radar and Surface Measurements of Rainfall. Part III: Specific Differential PhaseJournal of Atmospheric and Oceanic Technology, 1990
- A Differential Reflectivity Radar Hall Measurement Technique: Observations during the Denver Hailstorm of 13 June 1984Journal of Atmospheric and Oceanic Technology, 1990
- Relation between Measured Radar Reflectivity and Surface RainfallMonthly Weather Review, 1987