摘要
本文根据Ｈｏｓｋｉｎｓ所提出的惯性重力波不稳定判据：Ｒｉ＜ｆ／ζａ，结合湿斜压大气的特点，对１９９６年６月２９日０２时发生在我国东部的一次降水过程进行了分析，得出了下列特征：西南低空急流是降水得以产生所需水汽的载体；对流层下部深厚不稳定层结是对流性降水所必须的热力层结条件；该地区对流层下部满足Ｒｉｓｅ＜ｆ／ζａ，６ｈ后该地区惯性重力波不稳定增长。在充足水汽条件下，该地区发生暴雨。
? In the light of Ri<f/ζa , the criterion of instability for inertial gravitational wave as put forward by Hoskins, and considering the feature of moist barolinic atmosphere, we analyzed a rainfall event occurring in the East of China at 02BLT, 29 June, 1996. The following conclusions are obtained: the SW lower level jet was a main medium of moisture needed for the formation of rainfall event; the unstable stratification in the lower troposphere was a necessary thermal stratification condition for convective precipitation; when the atmosphere of the lower level of troposphere satisfies Rise<f/ζa, the inertial gravitational wave would increase unstably in 6 hours and under the condition of plenty moisture heavy rainfall would occur in these areas.
出处
《黄渤海海洋》
CSCD
1997年第4期38-42,共5页
Journal of Oceanography of Huanghai & Bohai Seas
