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度日模型通过正积温将冰雪消融和气温有效的联系到一起,模型中的关键参数是度日因子,即为正积温对应时段内的消融量.根据唐古拉山冬克玛底冰川2008年的实测资料,计算得到夏季消融期内冰川上的度日因子,并分析其空间变化规律.雪度日因子平均值为8.5mm.℃-1.d-1,大冬克玛底冰川雪冰混融度日因子和冰度日因子从海拔5330～5520m分别为4.5～9.6mm.℃-1.d-1和8.7～11.6mm.℃-1.d-1;小冬克玛底雪冰混融度日因子和冰度日因子从海拔5460～5710m分别为4.4～14.6mm.℃-1.d-1和9.9～16.1mm.℃-1.d-1.度日因子随海拔升高而递增,可能是随海拔增加,温度降低而太阳辐射增强所致.局地气候,地形等其它因素也使得度日因子在空间上的分布存在差异.
Degree-day model through the positive integration of ice melting and air temperature effectively linked, the key parameter in the model is the degree of Japan factor, that is, the positive temperature during the corresponding period of ablation volume. According to Tanggula winter Kemadi glacier in 2008 measured Data, and calculate the daily diurnal factor of glacier during the summer ablation period, and analyze the spatial variation law.The snow daily factor is 8.5mm.C -1 d -1, Degree-day factor and ice degree day factor from the elevation of 5330 ~ 5520m were 4.5 ~ 9.6mm. ℃ -1.d-1 and 8.7 ~ 11.6mm. ℃ -1.d-1; The daily and ice degrees daily factors ranged from 4.4 to 14.6 mm. ℃ -1.d-1 and from 9.9 to 16.1 mm. ℃ -1 d-1 respectively from 5460 to 5710 m. The daily factor increased with altitude, It may be due to the increase of altitude, the decrease of temperature and the increase of solar radiation.The local climate, terrain and other factors also make the spatial and temporal distribution of degrees and days differ.