| タイトル | Gravity waves generated by a tropical cyclone during the STEP tropical field program - A case study |
| 著者（英） | Starr, W.; Gary, B.; Chan, K. R.; Legg, M.; Bowen, S.; Pfister, L.; Kelly, K.; Proffitt, M.; Bui, T. P. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech.|NASA Ames Research Center |
| 発行日 | 1993-05-20 |
| 言語 | eng |
| 内容記述 | Overflights of a tropical cyclone during the Australian winter monsoon field experiment of the Stratosphere-Troposphere Exchange Project (STEP) show the presence of two mesoscale phenomena: a vertically propagating gravity wave with a horizontal wavelength of about 110 km and a feature with a horizontal scale comparable to that of the cyclone's entire cloud shield. The larger feature is fairly steady, though its physical interpretation is ambiguous. The 110-km gravity wave is transient, having maximum amplitude early in the flight and decreasing in amplitude thereafter. Its scale is comparable to that of 100-to 150-km-diameter cells of low satellite brightness temperatures within the overall cyclone cloud shield; these cells have lifetimes of 4.5 to 6 hrs. These cells correspond to regions of enhanced convection, higher cloud altitude, and upwardly displaced potential temperature surfaces. The temporal and spatial distribution of meteorological variables associated with the 110-km gravity wave can be simulated by a slowly moving transient forcing at the anvil top having an amplitude of 400-600 m, a lifetime of 4.5-6 hrs, and a size comparable to the cells of low brightness temperature. |
| NASA分類 | METEOROLOGY AND CLIMATOLOGY |
| レポートNO | 93A41245 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/316968 |
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