度日模型与简化型能量平衡模型的时空推广性分析——以乌鲁木齐河源1号冰川为例

Analyses on Transferability of Degree-Day Model and Simple Energy Balance Model— in Case of Urumqi Glacier No.1

以乌鲁木齐河源1号冰川为试验对象,对目前在区域尺度广为应用的2种物质平衡模型度日模型(DDM)与简化型能量平衡模型(s EBM)在时间与空间上的推广性进行分析。结果表明,在试验设定的条件下,s EBM唯有时间推广性较好,而DDM的时空推广性皆较差。通过理论分析得到相同的结论,且发现冰川表面气温直减率与降水垂直梯度取值的准确性,对提升2种模型的空间推广性具有重要意义。

With Urumqi Glacier No. 1 （ UG1 ） as the experimental object,the transferability in space and time of Degree-Day Model （DDM） and simple Energy Balance Model （sEBM） ,was analyzed respectively. The results indicated that the temporal transferability of sEBM is satisfying, while its spatial transferability is bad ; for DDM, transferability is bad both in space and time. The similar conclusions were obtained by theoretical analysis ,the accuracy of the glacier surface temperature lapse rate and precipitation vertical gradient value was also found. It is of great signifi- cance to improve the spatial transferability of the two models.