摘要
利用中尺度数值模式(ARPS模式)研究了湿气流过山脉地形和地形降水的产生机制。研究结果表明,地形降水是水汽、气流和地形相互作用而形成的。小山脉地形降水主要发生在山脉的迎风坡,表现出典型的迎风降水和背风雨影特征。而回流降水天气是湿气流过大的山脉地形的产物,大的山脉地形有利于风切变临界层的产生,地形降水并不只是简单的上坡降水,还有背风回流和背风波降水机制。
The moist air current crossing over the higher mountains and the forming of the reversal flow at the lower layer in the lee of the mountain are investigated with the advanced regional prediction system （ARPS）. The results show that the trend and elevation of the mountain range are the most important factors in the influence of terrains on weather and climate, and the mountain plays a positive role in the reversal flow weather. The effects of moisture are apparent on the forming of the blocked reversal flow in the upslope and the reversal flow in the lee of the mountain. It is suggested that the precipitation mechanism should include the lee precipitation mechanism for the lee reversal flow, except the upslope precipitation, especially for the moist airflow over higher mountain.
出处
《气象》
CSCD
北大核心
2006年第5期10-15,共6页
Meteorological Monthly
关键词
数值试验
迎风降水
背风雨影
背风回流降水
山脉地形
numerical simulation mountain upslope precipitation lee reversal precipitation rain shadow
