Simplification of heat balance calculation and its application to the glacier runoff from the July 1st Glacier in northwest China since the 1930s
Simplification of heat balance calculation and its application to the glacier runoff from the July 1st Glacier in northwest China since the 1930s
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DOI：
10.1002/hyp.7187
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发表时间：
2009-02
影响因子：
3.2
通讯作者：
A. Sakai;K. Fujita;M. Nakawo;T. Yao
中科院分区：
文献类型：
--
作者：
A. Sakai;K. Fujita;M. Nakawo;T. Yao
山区冰川融水自古以来就是西北干旱区重要的水资源。对冰川表面热平衡计算的气象要素进行了简化，目的是模拟7月1日冰川在几十年内的流量波动。通过估算降水的相对湿度和向下的太阳辐射，冰川的热平衡计算可以仅使用日温度和降水，这是很容易获得的。使用上述方法计算2002年融化季节的日流量比使用传统的正度-日（PDD）因子方法得到更好的模拟结果。（假定在任何特定时期，冰川的消融与该时期熔点以上的日平均气温之和成正比。）
Since ancient times meltwater from glaciers in mountain zones has been an important water resource in the arid region of northwest China. Meteorological elements for heat balance calculations at the glacier surface were simplified with the aim of simulating discharge fluctuations from the July 1st Glacier over a span of decades. By estimating relative humidity and downward solar radiation from precipitation, heat balance calculations at the glacier can be made using only daily temperature and precipitation, which are easily obtainable. Calculations of daily discharge using the above method during the melting season in 2002 produced a better simulation than those using the conventional positive degree‐day (PDD) factor method. (The ablation of glacier during any particular period is assumed to be proportional to the sum of daily mean temperatures above the melting point during that period.)