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首页> 外文期刊>Hydrology research >Estimating soil thaw energy in sub-Alpine tundra at the hillslope scale, Wolf Creek, Yukon Territory, Canada
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Estimating soil thaw energy in sub-Alpine tundra at the hillslope scale, Wolf Creek, Yukon Territory, Canada

机译：估计加拿大育空地区沃尔夫克里克山坡规模下亚寒带苔原的土壤融化能量

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摘要

Accurate representations of subsurface flow in hydrologic models of permafrost terrain during spring thaw require an understanding of soil thaw and soil thaw rates. Field data, including daily photographs for snowcover estimation and meteorological measurements, and measurements of soil thaw depth, soil temperature and soil moisture content, were acquired on an organic-covered hillslope in Granger Basin, Yukon Territory, to quantify relationships between net radiation and soil thaw energy. The infiltration and freezing of meltwater into the soil likely contributes to pre-thaw warming. When this energy (1.82 MJ m~(-2) d~(-1)) is taken into consideration, the daily mean contribution to soil thaw from net radiation is approximately 9%. Accounting for a period of refreezing that occurred during the study period and distributing the energy across the hillslope, the measured and estimated soil thaw depths compared well (R~2 = 0.92 and slope = 1.09). This research contributes to the understanding of active layer development, sheds insight into the role of infiltrating and freezing meltwater on soil thaw and provides an approach for the estimation of soil thaw based on a direct link between surface net radiation and the subsurface energy regime.
机译：在春季融化期间，多年冻土地形的水文模型中地下流量的准确表示需要了解土壤融化和土壤融化速率。在育空地区格兰杰盆地的一个有机覆盖的山坡上获取了现场数据，包括用于积雪估计和气象测量的每日照片，以及对土壤融化深度，土壤温度和土壤水分含量的测量，以量化净辐射与土壤之间的关系解冻能量。融水渗入并冻结到土壤中可能会导致融化前变暖。当考虑该能量（1.82 MJ m〜（-2）d〜（-1））时，净辐射对土壤融化的日平均贡献约为9％。考虑到研究期间发生的重新冻结并将能量分配到整个山坡上，实测和估算的土壤融化深度进行了比较（R〜2 = 0.92和坡度= 1.09）。这项研究有助于了解活动层的发展，深入了解融化水的渗透和冻结对土壤融化的作用，并为基于表面净辐射与地下能量状态之间的直接联系进行土壤融化的估算提供了一种方法。

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