Empirical Models for Predicting Water and Heat Flow Properties of Permafrost Soils
Empirical Models for Predicting Water and Heat Flow Properties of Permafrost Soils
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DOI：
10.1029/2020gl087646
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发表时间：
2020-06
影响因子：
5.2
通讯作者：
M. O'Connor;M. Cardenas;S. Ferencz;Yue Wu;B. Neilson;Jingyi Chen;G. Kling
中科院分区：
文献类型：
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作者：
M. O'Connor;M. Cardenas;S. Ferencz;Yue Wu;B. Neilson;Jingyi Chen;G. Kling
北极的变暖和融化正在促进富碳永久冻土和土壤中的地球化学过程和水文运输，将碳转移到地表沃茨或大气中。水文和生态地球化学的影响解冻是具有挑战性的预测与北极土壤水力和热性能的稀疏信息。我们开发了经验和统计模型的土壤性质的三个主要地层中的浅，季节性融化的土壤以上的永久冻土在阿拉斯加的研究面积约7,500平方公里。该模型表明，土壤垂直分层和水力特性是可预测的植被覆盖和坡度的基础上。我们还表明，不同的水力和热性能的每一个土层可以预测单独从容重。这些发现填补了北极地区地图稀少差距，并使土壤特性的区域插值对于确定未来的水文响应和融化的永久冻土中碳的命运至关重要。
Warming and thawing in the Arctic are promoting biogeochemical processing and hydrologic transport in carbon‐rich permafrost and soils that transfer carbon to surface waters or the atmosphere. Hydrologic and biogeochemical impacts of thawing are challenging to predict with sparse information on arctic soil hydraulic and thermal properties. We developed empirical and statistical models of soil properties for three main strata in the shallow, seasonally thawed soils above permafrost in a study area of ~7,500 km2 in Alaska. The models show that soil vertical stratification and hydraulic properties are predictable based on vegetation cover and slope. We also show that the distinct hydraulic and thermal properties of each soil stratum can be predicted solely from bulk density. These findings fill the gap for a sparsely mapped region of the Arctic and enable regional interpolation of soil properties critical for determining future hydrologic responses and the fate of carbon in thawing permafrost.