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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.
Based on the data of mass balance and meteorological observation during the ablation period of 2007 and 2008 at the Nam Co Lake glacier in the Nam Co Basin, on the northern slope of the Nyainqenqentanglt of the Qinghai-Tibet Plateau, the values of the diurnal values of glacier ice and snow were calculated. The results showed that the daily value of snow in Jadang Glacier was 5.3mm · d-1 · ℃ -1, the daily factor of ice at different altitudes was between 4.0 ~ 14.0mm · d-1 · ℃ -1, Average 9.2 mm · d-1 · ℃ -1 .The latitude and longitude factor of glacier ice in Zadan decreased with the elevation, but the seasonal variation was not obvious.Using daily degree model, The simulation results show that the material balance values for the glaciers in 2006/2007 and 2007/2008 are -534mmw.e. and 247mmw.e., respectively. The simulated values in 2007/2008 are close to the observed values.