| タイトル | The effect of latent heat release on synoptic-to-planetary scale wave interactions: Observational study |
| 本文（外部サイト） | http://hdl.handle.net/2060/19900002758 |
| 著者（英） | Greco, Steven; Colucci, Stephen |
| 著者所属（英） | Virginia Univ. |
| 発行日 | 1989-02-01 |
| 言語 | eng |
| 内容記述 | A blocking pattern which formed over eastern North America following the landfall of Hurricane Juan during November 1985 was investigated. It is hypothesize that latent heat released in the Hurricane's rainfall was either directly or indirectly responsible for the large observed 500 mb height rises over eastern Canada during the formation of this block. This idea is evaluated with a diagnostic model for the height tendency field which includes latent heat release as a forcing function. The total column heating is calculated using satellite-derived precipitation estimates. These estimates are qualitatively congruent with observations, but overestimate light rainfall and underestimate heavy rainfall. The calculations reveal that the direct contribution of the heating to the 500 mb height tendency field is small relative to the quasigeostrophic forcing. However, maxima in heating coincide with regions where anticyclonic potential vorticity is generated. Once such region is just upstream of the location of large 500 mb height rises in the incipient block. An indirect role is proposed for the heating in this case. Specifically, anticyclonic potential vorticity is generated near the heating maxima; this vorticity is then advected downstream, forcing the 500 mb heights to rise and the block to develop. |
| NASA分類 | METEOROLOGY AND CLIMATOLOGY |
| レポートNO | 90N12074 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/140020 |
