| タイトル | Buffering of stratospheric circulation by changing amounts of tropical ozone - A Pinatubo case study |
| 著者（英） | Toon, O. B.; Kinne, S.; Prather, M. J. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1992-10-02 |
| 言語 | eng |
| 内容記述 | Stratospheric aerosol from Mount Pinatubo heated the tropical lower stratosphere by about 0.3 K/day mainly due to absorption of terrestrial infrared radiation. This heating was dissipated by: (1) an observed increase in stratospheric temperatures, which enhanced the radiation cooling; (2) additional mean upward motion, observed for the aerosol cloud, which led to adiabatic cooling; and (3) reductions in ozone concentrations resulting from enhanced upward motions. Each of these processes operated on a different time scale: maximum temperatures were observed after about 90 days; maximum ozone losses of about -1.5 ppm occurred after 140 days when the enhanced vertical velocities effectively lifted the ozone profile by about 2 km. We believe this shows that ozone plays an important role in buffering vertical motion in the tropical lower stratosphere, and hence the residual Brewer Dobson circulation of the whole stratosphere. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 93A10383 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/322947 |
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