科研之友
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摘要
The special geographic position and natural environment make it more difficult to explore the glacial volume variation in Qinghai-Tibetan Plateau Interior Area than in the other glaciated regions. However, glaciers are one of the most important sources of water and one of the key indicators of climate changes, whose volume change information is pressing to know. In this paper, we make a preliminary study on the glacial volume variation from 1970 to 2000 in the Qinghai-Tibetan Plateau Interior Area, applying the statistical model between glacier volume and area and the data of glacier catalogue, existing research output about glacier area change and the extracted glacier variation information based RS and GIS by ourselves. The result shows that glacier volume has lost about 36. 25 km(3) in the past 30 years since 1970 in the Qinghai-Tibetan Plateau Interior Area, but it decreases more slowly than the average shrinking of the glaciers in the whole High-Asia. Then we analyze the characteristics of glacial volume change for 6 sub-catchments, and it is found that there are some large regional disparities. Among the 6 sub-catchments, the 5Z3 area has the largest glacier volume loss, and the percentage of area changes is -11. 19%, while the least loss area is 5Z1 and its retreat rate is only -0. 79%. The similar changes among all the 6 sub-catchments are that the volume shrink rate is greater than the area shrinking rate. The temperature and precipitation are considered to play main role in the change of glaciers for each sub-catchment. Finally, we discuss the ecological environment impact caused by the glacial volume change.
- 出版日期2014-5
