The Nowcasting of Precipitation during Sydney 2000: An Appraisal of the QPF Algorithms
| Autor: | Chris G. Collier, Clive Pierce, Michael Sleigh, Neil Fox, Alan Seed, Elizabeth E. Ebert, Cynthia K. Mueller, Norman Donaldson, Rita D. Roberts, James W. Wilson |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Weather and Forecasting. 19:7-21 |
| ISSN: | 1520-0434 0882-8156 |
| Popis: | Statistical and case study–oriented comparisons of the quantitative precipitation nowcasting (QPN) schemes demonstrated during the first World Weather Research Programme (WWRP) Forecast Demonstration Project (FDP), held in Sydney, Australia, during 2000, served to confirm many of the earlier reported findings regarding QPN algorithm design and performance. With a few notable exceptions, nowcasting algorithms based upon the linear extrapolation of observed precipitation motion (Lagrangian persistence) were generally superior to more sophisticated, nonlinear nowcasting methods. Centroid trackers [Thunderstorm Identification, Tracking, Analysis and Nowcasting System (TITAN)] and pattern matching extrapolators using multiple vectors (Auto-nowcaster and Nimrod) were most reliable in convective scenarios. During widespread, stratiform rain events, the pattern matching extrapolators were superior to centroid trackers and wind advection techniques (Gandolf, Nimrod). There is some limited case study and s... |
| Databáze: | OpenAIRE |
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