Energy budget comparison of snowmelt rates in a deciduous forest and an open site
Energy budget comparison of snowmelt rates in a deciduous forest and an open site
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落叶林和空地融雪率的能源预算比较
作者：
T. Ohta;T. Hashimoto;H. Ishibashi
落叶林的日融雪速率是开放站点的40-85%。融雪速度的降低是由于森林覆盖区的气象条件不同造成的。太阳辐射、净辐射和风速在森林中的减少尤为明显，两者之间的关系在两个地点都可用线性函数表示。两个站点的融雪速率可以通过能量收支方法进行预测，净辐射是两个站点融雪能量的主要组成部分。在这两个网站之间的差异是由于净辐射差异在许多天，但在特定的气象条件下，在这两个网站的净辐射的依赖减少。在固定气象条件下的参数分析表明，风速、温度和湿度改变了这种依赖关系，因为在强风条件下，森林中风速降低，湍流热交换量减少。
Daily snowmelt rates at a leafless deciduous forest site were 40–85% of those at an open site. Reduced snowmelt rates were caused by a difference in meteorological conditions at the forested site. Solar radiation, net radiation and wind speed were especially reduced in the forest, and relationships between them at the two sites were represented by linear functions. Snowmelt rates at the two sites could be predicted by an energy budget method, and net radiation was the major component in the snowmelt energy at both sites. Differences between snowmelt rates at the two sites were due to net radiation differences over many days, but dependency on net radiation at both sites was reduced under particular meteorological conditions. Parameteric analysis under fixed meteorological conditions indicates that this dependency is changed by wind speed, temperature and humidity, because wind speed is reduced in the forest and decrease of turbulent heat exchange in the forest will be notable under strong wind conditions.