【摘要】 根据青藏高原念青唐古拉峰北坡纳木错流域扎当冰川2007和2008年消融期的物质平衡和气象观测资料,计算了冰川冰和雪的度日因子值,分析了冰川度日因子的时空变化及影响因素.结果表明:扎当冰川雪的度日因子值为5.3mm·d-1·℃-1;不同海拔冰的度日因子在4.0～14.0mm·d-1·℃-1之间,平均为9.2mm·d-1·℃-1.扎当冰川冰的度日因子值随着海拔的升高有所下降,但季节变化规律不明显.利用度日模型对扎当冰川物质平衡进行了模拟,得到2006/2007年度和2007/2008年度该冰川的物质平衡值分别为-534mmw.e.和247mmw.e.,其中2007/2008年度的模拟值接近观测值.更多还原

【Abstract】 Using mass balance and meteorological data in the ablation season in 2007 and 2008 in the Zhadang Glacier on the Nyainqêntanglha Range of Tibetan Plateau,degree-day factors for snow and ice have been calculated,respectively,and their characteristics are analyzed.Degree-day factor is 5.3mm·d-1·℃-1for snow,and 4.0～14.0mm·d-1·℃-1(with an average of 9.2mm·d-1·℃-1) for ice at different altitudes.Degree-day factor for the Zhadang Glacier decreases with altitude increasing;however,there is no significant seasonal change.Mass balance in 2006/2007 and 2007/2008 of the Zhadang Glacier is estimated using degreeday model.The simulated mass balance in 2006/2007 is-534mm w.e.and 247mm w.e.in 2007/2008.The latter approximates to the observation much more.更多还原