Precipitation
12 important questions on Precipitation
Bergeron-Findeisen process (cold)
Which three factors, determine the raindrop size distribution?
Precipitation is a result from
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Requirements for rain gauge set up (WMO)
- Close to earth's surface
- prevent wind-induced errors
- splashing may become problem
- not too close to buildings
- difficult to find good location in urban areas
- prevent vandalism or damage due to animals
- autumatic rain gauges require good maintenance
How is radar used to detect rainfall?
Name some of the sources of error with radar
- Overshooting
- propagation conditions
- nonuniform vertical profile
- attenuation
- hail effects
- sea clutter
- windmills
- wet radome
- calibration
- insects
- birds
- interference
- aircraft
- chaff
- shielding
- ground clutter
What is a consequence of snow and overshooting with radar?
What are dual-pol radars?
GPM IMERG product
- 30 min resolution in time; 0.1 resolution in space
- covers 60 S - 60 N; freely available
- but on average roughly one satellite overpass per 1.5 h
What is a variogram?
How are variagram models characterized?
Give three factors which cause differences between rainfall measured with radar and microwave links.
- Radar measures large volume, microwave link measures over path (=smaller volume)
- radar measures at high altitude when far away from radar. Microwave links are established between towers and thus closer to land surface.
- measurement eros differ between radar and microwave links
The question on the page originate from the summary of the following study material:
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