摘要
根据太行山区多年的气候统计资料，分析了太行山区焚风的气候特征，并利用数值模式模拟了地形的热力强迫效应和动力影响机制对焚风形成和发展的影响。模拟结果清楚地再现了太行山焚风的气候特征，并揭示出焚风的决定性影响因子及下垫面热力强迫过程的修正作用，指出太行山东坡陡峭的阶梯状下沉地形强迫引起的过山气流，从次临界向超临界状态转换是焚风形成的根本原因。下垫面加热过程削弱了焚风的强度。
In this article,we use many years of climatic statistic data to analyse the fohn characters in Taihang mountain areas,and set up a two-dimensional numerical model to simulate the influence of topographic thermal-dynamic effects on the formation and development of the fohn The modelling results clearly show the climatic characters of foen in Taihang mountain and reveal its governing factors as well as modification affect caused by surface thermal effect,point out that the steep stepped terrain in east slope of Taihang mountain is the basic reason to cause fohn in this area It forces airflow to change from subcritical to supercritical condition and thus cause strong downslope wind Surface heating weakens the fohn strength,while,cooling makes it strong
出处
《高原气象》
CSCD
北大核心
1995年第4期443-450,共8页
Plateau Meteorology
