影响大兴安岭焚风的几个因子  

FACTORS AFFECTING DAXINGANLING FOEHN

作　　者：齐瑛[1] 傅抱璞[1] 

机构地区：[1]南京大学大气科学系

出　　处：《地理研究》1992年第3期16-21,共6页Geographical Research

基　　金：国家自然科学基金(49175243)

摘　　要：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 Da-xinganling 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.

关 键 词：大兴安岭 焚风 地形 

分 类 号：P425.52[天文地球—大气科学及气象学]