Based on observed mass balance and meteorological data since September 2008 and ablation data by the expedition team of Tibetan plateau from June to August 1982 at Baishui （白水） Glacier No. 1 region, we analyzed th...Based on observed mass balance and meteorological data since September 2008 and ablation data by the expedition team of Tibetan plateau from June to August 1982 at Baishui （白水） Glacier No. 1 region, we analyzed the spatial and temporal changes of degree-day factor （DDF） of the Baishui Glacier No. 1 following the changes of space, time, and temperature, which lays a theoretical foundation to establish DDF model. The results indicate that the melting DDF of ice showed a significant downward trend with rising temperatures, and larger value of DDF only appeared at low temperature conditions. A larger value of DDF appeared in the high altitude areas, and as altitude rises, the value of DDF increased. The snow DDF is lower than the DDF of ice, and the DDF is higher in temperate glaciers than those in other glaciers. The melting DDF of snow has a more obvious seasonal variation than the melting DDF of ice.展开更多
基金supported by the National Basic Research Program of China (No.2007CB411201)the National Natural Science Foundation of China (Nos.40971019,J0630966)+3 种基金the Special Grant for Postgraduate Research,Innovation and Practicethe West Light Foundation of Chinese Academy of Sciences (No.O828A11001)the Fund from the State Key Laboratory of Cryospheric Sciencesthe Fund from Lijiang City Government
文摘Based on observed mass balance and meteorological data since September 2008 and ablation data by the expedition team of Tibetan plateau from June to August 1982 at Baishui （白水） Glacier No. 1 region, we analyzed the spatial and temporal changes of degree-day factor （DDF） of the Baishui Glacier No. 1 following the changes of space, time, and temperature, which lays a theoretical foundation to establish DDF model. The results indicate that the melting DDF of ice showed a significant downward trend with rising temperatures, and larger value of DDF only appeared at low temperature conditions. A larger value of DDF appeared in the high altitude areas, and as altitude rises, the value of DDF increased. The snow DDF is lower than the DDF of ice, and the DDF is higher in temperate glaciers than those in other glaciers. The melting DDF of snow has a more obvious seasonal variation than the melting DDF of ice.
