本文借助二维大气中尺度数值模式,讨论了我国东北地区1月份大兴安岭东坡的焚风与山区地形形状的关系,并定性地绘出了该焚风现象生消的背景条件。

In this paper, a few factors affecting the foehn of the east slope of Daxinganling mountainchain in Northeast China in January are discussed by using the two-dimensional atmospheric meso-scale numerical model. The results show. (1) The leading topographic factor resulting in Daxinganling foehn is the east steep slope of Daxinganling mountainchain. The eastern gentle slope further promotes the development of.Daxinganling foehn. And the small-scale redges can be niglected. (2) The large-scale background conditions are essential for Daxinganling foehn forming. The Daxinganling foehn can not occur when the scorer number (N/U) of the largescale background field is too great or too small.