Simulation of snowmelt in a subarctic spruce woodland: 1. Tree model
Simulation of snowmelt in a subarctic spruce woodland: 1. Tree model
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DOI：
10.1029/2000wr900094
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发表时间：
2000-08
影响因子：
5.4
通讯作者：
M. Woo;Mark A. Giesbrecht
中科院分区：
文献类型：
--
作者：
M. Woo;Mark A. Giesbrecht
亚北极云杉树下的融雪的模拟模型，利用与融化，冠层的几何形状，经验函数和系数从现场获得的物理过程。该模型允许详细研究一棵树对雪消融的微观模式的影响。模拟结果与从树干向外两个方向延伸的沿着断面测得的日积雪深度进行了比较。辐射是融化总能量的主要组成部分，树冠增强了雪面的长波辐射平衡。强烈的不对称性融化速率之间的不同方位角内和超越树冠模拟，可以解释的融雪过程中，由于存在树的强度变化。
A model is presented for the simulation of snowmelt under a subarctic spruce tree, making use of the physical processes associated with melt, the geometry of the canopy, and empirical functions and coefficients obtained from the field. This model allows detailed study of the effect of a tree on the micropattern of snow ablation. Simulated results compare well with the daily snow depths measured along transects that extend in two directions outward from the tree trunk. Radiation represents the principal component of the total melt energy, and the tree canopy enhances the longwave radiation balance for the snow surface. Strong asymmetry in melt rates among different azimuths within and beyond the tree canopy is simulated and can be explained by the changing intensities of the snowmelt processes due to the presence of a tree.