| Autor: |
K. B. Earnshaw, R. S. Lawrence, Ting-I. Wang |
| Rok vydání: |
1979 |
| Předmět: |
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| Zdroj: |
Journal of Applied Meteorology. 18:654-660 |
| ISSN: |
0021-8952 |
| DOI: |
10.1175/1520-0450(1979)018<0654:pamorr>2.0.co;2 |
| Popis: |
Path-averaged terminal velocity distribution of raindrops is determined from the temporal covariance function of signals from two vertically spaced linear optical detectors that respond to raindrop-induced amplitude scintillations of a projected laser beam. The known monotonic relationship between drop size and terminal velocity permits the measured velocity distribution to be converted to path-averaged drop-size distribution and, in turn, to rain rate. The large capture area of the measurements over a 200 m path allows drop-size distribution to be measured in short time intervals. We present measurements of path-averaged rain rate and raindrop size distribution made at 42 s intervals. The terminal velocity distribution during a storm that contained a mixture of rain and hail clearly shows the two-component nature of the precipitation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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