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首页> 外文期刊>Journal of Glaciology >A physically based model of the year-round surface energy and mass balance of debris-covered glaciers
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A physically based model of the year-round surface energy and mass balance of debris-covered glaciers

机译：基于物理模型的常年表面覆盖的碎屑冰川的表面能和质量平衡

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摘要

Debris-covered glaciers respond to atmospheric conditions in different ways from debrisfree glaciers, due to the presence of debris at the surface during the ablation season and at the snow/ice interface during the accumulation season. Understanding the response of debris-covered glaciers to a variety of meteorological conditions in a physically sound manner is essential to quantify meltwater discharge and to predict their response to climate change. To tackle this issue, we developed the Crocus- DEB model as an adaptation of the detailed snowpack model Crocus, to simulate the energy and mass balance of debris-covered glaciers, including periods when debris is covered by snow. Crocus-DEB was evaluated with data gathered during a field experiment using artificial debris covering the snowpack at Col de Porte, France, with very good results in terms of conductive heat flux, both at the surface and at the interface between the debris and the underlying dense snow taken as a surrogate for ice, with and without snow overlying the debris. The model was also evaluated using field data from the debriscovered glacier Changri Nup, Nepal, Himalaya. This paper introduces the design of the model, its performance and its ability to explore relationships between model parameters, meteorological conditions and the critical debris thickness.
机译：覆盖碎片的冰川以与无碎片冰川不同的方式对大气条件做出响应，这是由于在消融季节表面存在碎屑，在积聚季节在雪/冰界面处存在碎屑。以物理上合理的方式了解残骸覆盖的冰川对各种气象条件的响应，对于量化融水排放量和预测其对气候变化的响应至关重要。为了解决这个问题，我们开发了Crocus-DEB模型作为对详细的积雪模型Crocus的改编，以模拟覆盖有碎屑的冰川的能量和质量平衡，包括碎屑被雪覆盖的时期。使用在法国科尔德波特的积雪覆盖的人工碎片，在野外实验期间收集的数据对番红花-DEB进行了评估，就碎片和底层之间的表面和界面处的传导热通量而言，都取得了很好的结果积雪被用作冰的替代品，有或没有积雪覆盖在碎屑上。还使用来自尼泊尔喜马拉雅山残骸发现的冰川Changri Nup的现场数据对模型进行了评估。本文介绍了模型的设计，性能以及探索模型参数，气象条件和关键碎片厚度之间关系的能力。

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