摘要
本文采用非稳态具有内热源的一维温度场数学模型描述雪层内部的温度分布状况及其变化规律.根据多年的观测资料和实验研究结果.首先确定影响雪层温度状况外部因素的作用机理和变化形式,最后给出了数学模型的解析解并与实测数据进行了比较验证,取得了比较满意结果。
A mathematical model is proposed to simulate the spatial and temporal variations ofsnow temperatudre. The model is based on the non-steady one-dimensional heat-conduc-tion equation with internal heat source. It gives the change in time of the internal tempera-ture of the snow as it responds to varing surface temperature and periodic solar radiation.Verificiation of the model is accomplished by comparing the calculated results with ob-served data. Although the model presented seems too complex for application, and somcdefects need improving, it may be considered as a useful tool to investigate various physicalprocesses in snow. One of the advantage offered by this model is, it not only permits aquantitative descripkion of temperature regime in snow, but also relates it to external condi-tions. This allows a better understanding of relationshop between the thermal regine of thesnow cover and external atmospheric conditions, from a theoretical perspective.
出处
《干旱区地理》
CSCD
北大核心
1991年第4期48-55,共8页
Arid Land Geography
