【摘要】 本文使用了一维非定常热力方程对夜间大气边界层热力结构进行了数值模拟.结果表明:(1)当天气形势变化平稳时,平坦地区夜间边界层热力结构的变化主要受到湍流与辐射传输作用的影响.(2)由于地-气之间热量传输的相互调整作用,使低层湍流变温率与地面温度变率之间表现为有相同周期的变化. 文中通过该模式的计算结果与复杂地形的实验资料的对比,研究了平流作用对温度垂直分布的影响.更多还原

【Abstract】 By using one-dimensional, nonsteady state thermodynamie equations, the thermal structure in the nocturnal atmospheric boundary layer is numerically simulated. The main results are as follow:(1) The variations of the thermal structure in the nocturnal atmospheric boundary layer over the flat terrain, when the weather situation is slowly changed, are mainly affected by turbulence and radiation transfer.(2) There are the same cycles in the lower layer turbulent temperature variability and the surface temperature variability as a result of heat transfers between the earth and air.Finally, the effects of advection on the vertieal distribution of temperature are discussed by comparing the computed results from the model with the experimental data under complex orographie conditions.更多还原