| タイトル | Doppler radar observations of the three-dimensional turbulent structure of a quasi-steady thunderstorm |
| 著者（英） | Cotton, W. R.; Knupp, K. R. |
| 著者所属（英） | Colorado State Univ. |
| 発行日 | 1980-01-01 |
| 言語 | eng |
| 内容記述 | The spatial patterns and temporal evolution of Doppler radar-inferred turbulence within a quasi-steady, left-moving thunderstorm are reported. An organized downdraft circulation was observed, which maintained a persistent, continuously-propagating, anticyclonic and turbulent updraft. The updrafts attained peak speeds of 25 m/s, and maximum estimated reflectivity factors exhibited peak magnitudes of 50-55 dBZ. Mechanical and buoyant production appeared to be the primary generators of turbulence, although buoyancy generation may have also significantly contributed, since turbulent and dynamic entrainment into the vertically accelerating updraft was appreciable below the strongest turbulent activity at 7 km. Patterns of the radial shears of radial velocity exhibited a significant decrease in strength and areal coverage as the storm weakened, which is attributed to decreased activity of large turbulent eddies and the diminution of large-scale mean wind gradients produced by vertical exchanges of horizontal momentum and strong updraft gradients. |
| NASA分類 | METEOROLOGY AND CLIMATOLOGY |
| レポートNO | 82A10255 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/413525 |
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