We selected four typical glaciers in the Qilian Mountains and investigated their movements and variation using advanced technologies such as remote sensing, photographic measurements, and global positioning systems. T...We selected four typical glaciers in the Qilian Mountains and investigated their movements and variation using advanced technologies such as remote sensing, photographic measurements, and global positioning systems. The velocity of glacier movements in the Qilian Mountains is relatively low, and there has been no significant variation during the past 50 years. Glacier motion has maintained a normal style. The movement velocity of Laohugou Glacier No. 12 presented a decreasing trend （by 48%） from 1960 to 2012. The movement velocity of the Qiyi Glacier also presented a decreasing trend （by 48.1%） from 1958 to 2012; it decreased by 29.4% from 1958 to 1977 and by 26.5% from 1977 to 2012. Therefore, the Qiyi Glacier＇s movement velocity varied greatly over the earlier 20 years （1958 1977）, but presented a small decreasing trend during the latter 30 years （1977-2012）. By comparing the movement velocity variation of these typical glaciers, we determined that the extent of variation was consistent among large glaciers （such as Laohugou Glacier No. 12） and small glaciers （such as the Qiyi Glacier and Yanglonghe Glacier No. 5）, despite their different sizes.展开更多
Glacier shape factors （area, length, and thickness）, climatic factors （annual temperature and precipitation）, mass balance, and other influence factors, of the Qiyi glacier velocity and their intensity were analyz...Glacier shape factors （area, length, and thickness）, climatic factors （annual temperature and precipitation）, mass balance, and other influence factors, of the Qiyi glacier velocity and their intensity were analyzed with the application of the path analysis method during 1958-2007. Results indicate that glacier velocity was mainly influenced by glacier shape, followed by mass balance and climatic conditions. Among the influence factors, glacier area and thickness are most significant, and direct and indirect path coef- ficients are respectively 6.56, 4.71, 19.29 and 13.57. This research provides information for further understanding glacier velocity and its influencing factors.展开更多
基金supported by National Key Project for Basic Research of China,No.2007CB411501National Natural Science Foundation of China,No.4087103+1 种基金International Innovation Partnership Program of the Chinese Academy of Sciences No. CXTD-Z2005-2Knowledge Innovation Project of the Chinese Academy of Sciences No. KZCX2-YW-127
基金supported by CAS(KJZD-EW-G03-04)the Global Change Research Program of China(No.2010CB951404)the National Natural Science Foundation of China(No.41071043)
文摘We selected four typical glaciers in the Qilian Mountains and investigated their movements and variation using advanced technologies such as remote sensing, photographic measurements, and global positioning systems. The velocity of glacier movements in the Qilian Mountains is relatively low, and there has been no significant variation during the past 50 years. Glacier motion has maintained a normal style. The movement velocity of Laohugou Glacier No. 12 presented a decreasing trend （by 48%） from 1960 to 2012. The movement velocity of the Qiyi Glacier also presented a decreasing trend （by 48.1%） from 1958 to 2012; it decreased by 29.4% from 1958 to 1977 and by 26.5% from 1977 to 2012. Therefore, the Qiyi Glacier＇s movement velocity varied greatly over the earlier 20 years （1958 1977）, but presented a small decreasing trend during the latter 30 years （1977-2012）. By comparing the movement velocity variation of these typical glaciers, we determined that the extent of variation was consistent among large glaciers （such as Laohugou Glacier No. 12） and small glaciers （such as the Qiyi Glacier and Yanglonghe Glacier No. 5）, despite their different sizes.
基金supported by the Global Change Research Program of China (2010CB951404)The National Natura Science Foundation of China (41071043)
文摘Glacier shape factors （area, length, and thickness）, climatic factors （annual temperature and precipitation）, mass balance, and other influence factors, of the Qiyi glacier velocity and their intensity were analyzed with the application of the path analysis method during 1958-2007. Results indicate that glacier velocity was mainly influenced by glacier shape, followed by mass balance and climatic conditions. Among the influence factors, glacier area and thickness are most significant, and direct and indirect path coef- ficients are respectively 6.56, 4.71, 19.29 and 13.57. This research provides information for further understanding glacier velocity and its influencing factors.
