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首页> 外文会议>Symposium on Water Resources Systems - Water Availability and Global Change; Jun 30-Jul 11, 2003; Sapporo, Japan >Effect of snow interception on the energy balance above deciduous and coniferous forests during a snowy winter
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Effect of snow interception on the energy balance above deciduous and coniferous forests during a snowy winter

机译：在一个下雪的冬天，积雪对落叶和针叶林上方能量平衡的影响

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摘要

We discuss how snow intercepted by deciduous and coniferous forests affects their water and energy balances. Intensive micrometeorological observations above and below the canopy were carried out in deciduous (DF) and coniferous (CF) forests in the winter of 1996-97 in Sapporo, Hokkaido Island, Japan. Compared with the DF, large amounts of intercepted snow on the canopy of the CF caused a relatively large latent heat flux, which depended on the aerodynamic and canopy resistance. When the intercepted snow on the canopy disappeared from the CF, the sensible and latent heat fluxes were the same at the two sites. Canopy resistance determined the latent heat flux above the DF because the aerodynamic resistance was insignificantly small. The canopy resistance for the DF was correlated with the snow surface temperature. Differences in the amounts of intercepted snow and in the canopy and aerodynamic resistance affected the partition of the input radiative energy above the two canopies. Furthermore, the site of effective energy exchange differed in the CF and DF because the effective energy exchange in the DF occurred at the forest floor.
机译：我们讨论了落叶和针叶林拦截的积雪如何影响它们的水和能量平衡。 1996-97年冬季，在日本北海道岛札幌的落叶（DF）和针叶（CF）森林中进行了冠层上方和下方的密集微气象观测。与DF相比，CF冠层上截留的大量积雪导致相对较大的潜热通量，这取决于空气动力学和冠层阻力。当被遮盖的积雪从CF中消失时，这两个位置的感热通量和潜热通量都相同。顶篷阻力决定了DF上方的潜热通量，因为空气动力学阻力很小。 DF的冠层阻力与雪表面温度相关。截留的雪量，顶篷和空气动力学阻力的差异影响了两个顶篷上方输入辐射能的分配。此外，CF和DF中的有效能量交换位置有所不同，因为DF中的有效能量交换发生在森林地面。

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