During the 2005 Arctic Yellow River Station expedition, the research on monitoring the movement and mass balance of two glaciers around Ny-Alesund, Austrelovenbreen and Pedersenbreen, which were selected in the 2004 Y...During the 2005 Arctic Yellow River Station expedition, the research on monitoring the movement and mass balance of two glaciers around Ny-Alesund, Austrelovenbreen and Pedersenbreen, which were selected in the 2004 Yellow River Station expedition were conducted. This paper analyzes the feasibility and advantage in using GPS method to monitor the Arctic glaciers＇movement, estimates the precision of first time measured GPS data and discusses the relevant problems in surveying on the Arctic Glaciers with GPS.展开更多
The Laohugou Glacier No. 12 is the largest valley glacier in Qilian Mountains, which is located in northem Qinghai-Tibet Plateau. Movement is the basic characteristic of glaciers, and is also an important distinction ...The Laohugou Glacier No. 12 is the largest valley glacier in Qilian Mountains, which is located in northem Qinghai-Tibet Plateau. Movement is the basic characteristic of glaciers, and is also an important distinction from other terrestrial natural ice. Glacier changes not only reflect climate change, but also play an important role in humanity society. In the arid regions of western China, glaciers are becoming an important water source. We use the GPS receiver （South-Lingrui $82） as data platform with the aid of RTK measurement technology to observe the surface velocity of Laohugou Glacier No. 12. Surface velocity data shows that the maximum value appears at an altitude of 4,750-4,850 m during the period of 2008-2009. During this period, the west branch surface velocity reached 32.6 m per year at an altitude near 4,830 m, the east branch surface velocity reached 32.4 m per year at the altitude near 4,770 m. Comparing the surface velocity data during 2008-2009 with observation results in 1959, the glacier velocity slowed down about 11%.展开更多
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
Studies of movement mechanisms have been carried out in Urumqi Glacier No. 1 for years Four mechanisms have been identified. They are ice deformation, bed deformation, shear faulting and sliding over the bed. The cree...Studies of movement mechanisms have been carried out in Urumqi Glacier No. 1 for years Four mechanisms have been identified. They are ice deformation, bed deformation, shear faulting and sliding over the bed. The creep experiment on polycrystalline ice with impurities and the observation in ice tunnels excavated at the glacier base show that a definite store of impurities is able to significantly increase the deformation of bed composed of ice-laden debris at the temperature between - 1℃ and the melting point The subpolar-type glaciers in China, on the basis of these studies, might be distinguished into three modes whose movement mechanisms differ from each other to a degree according to their scale and the location of the O’C isotherm.展开更多
文摘During the 2005 Arctic Yellow River Station expedition, the research on monitoring the movement and mass balance of two glaciers around Ny-Alesund, Austrelovenbreen and Pedersenbreen, which were selected in the 2004 Yellow River Station expedition were conducted. This paper analyzes the feasibility and advantage in using GPS method to monitor the Arctic glaciers＇movement, estimates the precision of first time measured GPS data and discusses the relevant problems in surveying on the Arctic Glaciers with GPS.
基金supported by the Chinese Key Basic Research Development Project (973) (Grant Number: 2007CB411501)the National Basic Work Program of Chinese Ministry of Science and Technology "Investigation of glacier resources and their variations in China" (Grant number: 2006FY110200)the Self-determination Project of State Key Laboratory of Cryospheric Sciences (Grant number: SKLCS09-04)
文摘The Laohugou Glacier No. 12 is the largest valley glacier in Qilian Mountains, which is located in northem Qinghai-Tibet Plateau. Movement is the basic characteristic of glaciers, and is also an important distinction from other terrestrial natural ice. Glacier changes not only reflect climate change, but also play an important role in humanity society. In the arid regions of western China, glaciers are becoming an important water source. We use the GPS receiver （South-Lingrui $82） as data platform with the aid of RTK measurement technology to observe the surface velocity of Laohugou Glacier No. 12. Surface velocity data shows that the maximum value appears at an altitude of 4,750-4,850 m during the period of 2008-2009. During this period, the west branch surface velocity reached 32.6 m per year at an altitude near 4,830 m, the east branch surface velocity reached 32.4 m per year at the altitude near 4,770 m. Comparing the surface velocity data during 2008-2009 with observation results in 1959, the glacier velocity slowed down about 11%.
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Project supported by the National Natural Science Foundation of China.
文摘Studies of movement mechanisms have been carried out in Urumqi Glacier No. 1 for years Four mechanisms have been identified. They are ice deformation, bed deformation, shear faulting and sliding over the bed. The creep experiment on polycrystalline ice with impurities and the observation in ice tunnels excavated at the glacier base show that a definite store of impurities is able to significantly increase the deformation of bed composed of ice-laden debris at the temperature between - 1℃ and the melting point The subpolar-type glaciers in China, on the basis of these studies, might be distinguished into three modes whose movement mechanisms differ from each other to a degree according to their scale and the location of the O’C isotherm.
