美國QPE的最新發展 NCAR/EOL 李文兆博士 2014
課時列表
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1 Recent Development of QPE in the United States (00:00:00)
1 The Colorado Flood of 2013 (11-13 September) (00:03:44)
1 How Much Rain (00:10:02)
1 Typical Z-R relationship dramatically underestimated the rainfall (00:12:39)
1 Radar Estimated Rainfall (00:14:51)
1 Total Precipitation (00:17:24)
1 So why such an unusual heavy rain event with small rain drops (00:18:21)
1 GOES Water Vapor and 500 hPa Heights/Vorticity Movie Loop: 9-13 September 2013 (00:20:13)
1 Can such a rare event be forecast by operational NWP (00:20:57)
1 38 hour Loop of Denver KFTG Radar Reflectivity (00:21:56)
1 Examples showing that the small scale convergent wind features dictate where the heavy rainfall regions will occur. (00:22:25)
1 PECAN domain (00:23:07)
1 Dual-pol QPE algorithms use a variety of relationships to compute precipitation rate from radar variables. (00:24:50)
1 Some hybrid QPE algorithms are based on rules and decision thresholds (00:26:09)
1 Alternative approach – use hydrometeor classification to select the appropriate rate relationship (00:27:17)
1 The NCAR PID algorithm classifies the scatterertype using fuzzy logic applied to the dual-polarization fields. (00:27:28)
1 Radar-based 24-hour QPE vs gauge-measured statistics 2015/05/17 – 2015/07/16 (00:28:03)
1 Beam blockage algorithm (00:29:19)
1 QPE (00:30:13)
1 DIAL Principles (00:30:42)
1 Gen 4 Performance (00:35:22)
1 Gen 4 Performance in PECAN (00:36:58)
1 Scatterplots (00:39:06)
1 Scatterplots (00:39:14)
1 Overview of VDRAS (00:39:17)
1 Mesoscale processes revealed by VDRAS analysis (00:39:31)
1 Schematic summary (00:40:07)
1 Water Cycle Modeling and Prediction within the WRF-Hydro System (00:41:12)
1 Water Cycle Modeling and Prediction within the WRF-Hydro System (00:41:32)
1 QPE Uncertainty (00:42:20)
1 QPE Uncertainty (00:42:53)
1 Summary (00:43:07)
1 Thank you for your attention (00:44:23)