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- W577068868 abstract "Glaciers are distributed in Nyainqentanglha Mountains, Himalayas, Tanggula Mountains, Gangdise Mountains, and Hengduan Mountains in southwestern China. Under temperature rise, especially the increasing warming with altitude recorded by 110 stations, ice cores and tree rings in southwestern China, four characteristics of glacier variations occurred during recent decades: the fronts of 32 glaciers and areas of 13 glacial basins have retreated, mass losses of 10 glaciers have been considerable, glacial lakes in six regions have expanded and melt water discharge of four basins has also increased, the typical glacier showed the accelerative ablation. The remarkable regional differences of glacier change in southwestern China may be caused by the two following factors: differences in temperature and precipitation; and differences of glacier location, scale, and frontal altitude. As response to climate change, eight monsoonal temperate glaciers were stationary or advancing between the 1900s–1930s and the 1960s–1980s, and were in retreat from the 1930s to the 1960s and from the 1980s to the present. In a world, it is evident that the glacier retreat stages are in the warm and wet phases, and vice versa. The accumulated mass balance in Hailuogou basin is -10.83 m water equivalent in the past 45 years, an annual mean value of -0.24m water equivalent, and 29 years are negative mass balance year, show that it suffered a sustained mass loss of snow and ice in the period 1959/1960–2003/2004. And what's more, the warming climate has had an impact on the hydrological cycle at glacial area. As the glacier area subject to melting has increased and the ablation season has become longer, the contribution of meltwater to annual river discharge has increased, which can be reflected by the increased runoff in the downstream region of the glacial area of the Yanggongjiang basin during 1979–2003 and Hailuogou basin during 1999–2004, and the mean contribution of the runoff in the downstream region of the glacial area to the whole basin are 35.8% and 54.7%, respectively. The earlier onset of ablation at higher elevation glaciers has resulted in the period of minimum discharge occurring earlier in the year, and seasonal runoff variations are dominated by snow and glacier melt. The increase amplitude of runoff in the downstream region of the glacial area is much stronger than that of precipitation, resulting from the prominent increase of meltwater from glacial region in two basins. As the acceleration of ablation velocity, the lengthening of ablation period, and the extension of ablation area, changes of internal and upper surface morphology also occurred and characterized by many ice clefts, glacier collapses, decrease of thickness, enlargement of glacial caves, and reduction of the size of seracs, providing evidence of the response to climatic warming in recent years. However, it is difficult to discuss the quantitative relationship between climate change and glacier behavior in southwestern China owing to the limited observation in the glacial accumulation areas and the complexity of climate change and glacier dynamic response." @default.
- W577068868 created "2016-06-24" @default.
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- W577068868 date "2014-10-28" @default.
- W577068868 modified "2023-09-26" @default.
- W577068868 title "Glaciers Response to Climate Change in Southwestern China" @default.
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- W577068868 doi "https://doi.org/10.1007/978-3-662-44742-0_7" @default.
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