Calculating ice melt beneath a debris layer using meteorological data
Calculating ice melt beneath a debris layer using meteorological data
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DOI：
10.3189/172756506781828584
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发表时间：
2006
影响因子：
3.4
通讯作者：
L. Nicholson;D. Benn
中科院分区：
文献类型：
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作者：
L. Nicholson;D. Benn
摘要亚碎屑冰消融的广义数值模型比预测径流和冰川对气候变化响应的经验方法更可取，因为经验方法具有场地特异性，并且强烈依赖于测量期间的条件。我们提出了一个修改后的表面能量平衡模型来计算融化下的表面碎片层每日平均气象变量。尽管有许多简化，该模型表现良好，模拟的熔化率给出了一个很好的匹配观察到的熔化率，这表明该模型可以产生可靠的估计数分米厚的碎片层下的烧蚀率。这是对以前的模型的有益改进，以前的模型不适用于厚的碎片覆盖层。
Abstract Generalized numerical models of sub-debris ice ablation are preferable to empirical approaches for predicting runoff and glacier response to climate change, as empirical methods are site-specific and strongly dependent upon the conditions prevailing during the measurement period. We present a modified surface energy-balance model to calculate melt beneath a surface debris layer from daily mean meteorological variables. Despite numerous simplifications, the model performs well and modelled melt rates give a good match to observed melt rates, suggesting that this model can produce reliable estimates of ablation rate beneath debris layers several decimetres thick. This is a useful improvement on previous models which are inappropriate for thick debris cover.