南岭局地小地形背风坡增雾作用的分析

Effects of Micro-Terrain in Nanling Mountains on Fog Intension over Leeward Slopes

对南岭地区乐昌站和乳源站1968—1998年31年的雾日气候资料进行了统计分析,对比分析发现,在背风坡雾产生的日数明显较多,即南岭地区存在显著的小地形背风坡雾现象。同时,利用CSU-RAMS中尺度数值模式进一步研究局地小地形背风坡雾的作用,模拟结果表明,小地形动力作用对背风坡雾有重要影响。

The climatic character of 31-year fog in Lechang and Ruyuan is statistically analyzed. The results show that the fog is considerably influenced by local micro-topography, and the day numbers of lee fog occurrence obviously increase. At the same time, by means of CSU-RAMS model, the effect of local micro-topography on lee side fog is further studied. The simulated results show that the dynamic function of micro-topography to lee side fog has important action, and the forming and developing of the lee side fog are to gain some dynamic profits from local micro-topography.