Intercomparisons of SMS Wind Sets: A Study Using Rapid-Scan Imagery
| Autor: | David Suchman, Gregory Johnson |
|---|---|
| Rok vydání: | 1980 |
| Předmět: | |
| Zdroj: | Monthly Weather Review. 108:1672-1688 |
| ISSN: | 1520-0493 0027-0644 |
| DOI: | 10.1175/1520-0493(1980)108<1672:ioswsa>2.0.co;2 |
| Popis: | In this study, the effect of variations in the time and space resolutions of satellite images on satellite-derived drift winds is examined. Rapid-scan satellite data are used as a basis for computing cloud-tracked wind fields over the south central United States on three synoptically different days in 1978. Winds from 30, 15, 6 and 3 min intervals are produced, discussed and compared. The latter includes examination of flow patterns, comparisons of mean and standard deviation values for speed and direction, and a discussion of operator observations. Low-level clouds are tracked on three separate days, the cirrus level is tracked on two separate days. Nearly 10 times as many low cloud winds were computed on days of rapid cloud growth and dissipation using a 3 min interval rather than the conventional 30 min interval; spatial coverage of vectors was also significantly greater. The difference in the number of cloud winds was less pronounced on days with longer cloud lifetimes. Cirrus clouds, with li... |
| Databáze: | OpenAIRE |
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