Some aspects of energy balance and ablation of Storglaciaren, northern Sweden
Some aspects of energy balance and ablation of Storglaciaren, northern Sweden
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DOI：
10.1080/04353676.1996.11880458
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发表时间：
1996-08
影响因子：
1.5
通讯作者：
R. Hock;B. Holmgren
中科院分区：
文献类型：
--
作者：
R. Hock;B. Holmgren
20世纪70年代后半期和90年代，在Storglaciaren上进行了综合性冰川气象实验。 1994 年 7 月和 8 月的 40 天期间，表面能量平衡是根据冰川气象站获得的测量值计算得出的。将作为热平衡方程中的残差获得的熔化速率与气候站附近的烧蚀仪和烧蚀桩的测量结果进行比较。平均而言，净辐射和湍流通量的贡献分别约为三分之二和三分之一。在有浓雾或降水的日子里，计算出的融化能量被大大低估。能量平衡对表面粗糙度的选择极其敏感。风速对数剖面的粗糙度长度比温度的粗糙度长度高两个数量级。
A comprehensive glacio-meteorological experiment was conducted on Storglaciaren in both the second half of the 1970s and in the 1990s. For a 40 day period in July and August 1994, the surface energy balance was calculated from measurements obtained by a meteorological station on the glacier. Melt rates obtained as residuals in the heat balance equation were compared to measurements with ablatographs and ablation stakes in the vicinity of the climate station. On average, the contributions of the net radiation and the turbulent fluxes were roughly two thirds and one third, respectively. Calculated melt energy was considerably underestimated on days characterized by dense fog or precipitation. The energy balance was extremely sensitive to the choice of surface roughness. The roughness length for the logarithmic profile of wind speed was higher than the roughness length for temperature by two orders of magnitude.