| 理查逊数和晴空颠簸的关系 |
| |
| 引用本文： | 钟中,张金善.理查逊数和晴空颠簸的关系[J].气象科学,1996,16(1):56-62. |
| |
| 作者姓名： | 钟中 张金善 |
| |
| 作者单位： | 空军气象学院(钟中)，南京水利科学研究院(张金善) |
| |
| 摘 要： | 对切变气流中重力内波的稳定性进行了数值计算，结果表明，判别晴空颠是否发生的临界Ｒｉ数随波长，层结稳定度和基本气流变强度的不同而有所变化，预报业务中用Ｒｉ〈０．２５作为预报晴空的指标易出现空报。
|
| 关 键 词： | 理查逊数 重力内波 不稳定 晴空颠簸 大气 |
THE RELATIONSHIPS BETWEEN RICHARDSON NUMBER AND CLEAR AIR TURBULENCE |
| |
| Zhong Zhong.THE RELATIONSHIPS BETWEEN RICHARDSON NUMBER AND CLEAR AIR TURBULENCE[J].Scientia Meteorologica Sinica,1996,16(1):56-62. |
| |
| Authors: | Zhong Zhong |
| |
| Institution: | Zhong Zhong(Air Force Institute of Meteorology)Zhang Jinsban(Nanjing Hydraulic Research Institute) |
| |
| Abstract: | In this paper, theoretical calculations of the stability of inner-gravity waves on shearing basic flow are made. The results show that the critical Richardson number,which is a criterion whether the clear air turbulence (CAT) appears, changes with wave length, stratification stability and basic flow shear, it is less than 0. 25 for the wave length less than 100 km. The area of predicted CAT with general index Ri<0. 25 may have no one occurred in operational forecastings. |
| |
| Keywords: | Richardson number Inner-gravity wave instability Clear air turbulence |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《气象科学》浏览原始摘要信息 |
| 点击此处可从《气象科学》下载免费的PDF全文 |
