A two‐directional freeze and thaw algorithm for hydrologic and land surface modelling
A two‐directional freeze and thaw algorithm for hydrologic and land surface modelling
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DOI：
10.1029/2004gl019475
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发表时间：
2004-06
影响因子：
5.2
通讯作者：
M. Woo;M. A. Arain;M. Mollinga;S. Yi
中科院分区：
文献类型：
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作者：
M. Woo;M. A. Arain;M. Mollinga;S. Yi
本文提出了一个双向Stefan的解决方案，计算冻结和解冻的土柱。使用一组倒置的方程来驱动土壤从底部冻融是对原始冻融模型的重大改进。使用该算法进行的模拟与从北极，亚北极和冷温带地区的观测数据中插值的0°C等温线进行了很好的比较，这些地区具有不同的霜冻条件，从永久冻土到北美南北梯度的季节性霜冻。将显式冻融参数化纳入水文和陆面模型将能够真实地模拟土壤温度、土壤湿度和径流/渗透，从而模拟高纬度地区的能量、水和温室气体交换过程。
This paper presents a two‐directional Stefan's solution for computing the freeze and thaw of soil columns. Use of an inverted set of equations to drive the soil freeze‐thaw from the bottom is a significant improvement to the original freeze‐thaw model. Simulations using the algorithm compared well with the 0°C isotherm interpolated from observed data at Arctic, Subarctic and cool temperate sites with different frost conditions that range from permafrost to seasonal frost across a north‐south gradient in North America. The incorporation of explicit freeze‐thaw parameterization in hydrologic and land surface models would enable realistic simulation of soil temperature, soil moisture and runoff/infiltration and hence energy, water and greenhouse gas exchange processes in high latitudes.