气候变化领域集成服务门户(CCPortal): Contrasting climate change impact on river flows from high-altitude catchments in the Himalayan and Andes Mountains

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DOI	10.1073/pnas.1606526113
	Contrasting climate change impact on river flows from high-altitude catchments in the Himalayan and Andes Mountains
	Ragettli S.; Immerzeel W.W.; Pellicciotti F.
发表日期	2016
ISSN	0027-8424
起始页码	9222
结束页码	9227
卷号	113 期号:33
英文摘要	Mountain ranges are the world's natural water towers and provide water resources for millions of people. However, their hydrological balance and possible future changes in river flow remain poorly understood because of high meteorological variability, physical inaccessibility, and the complex interplay between climate, cryosphere, and hydrological processes. Here, we use a state-of-the art glacio-hydrological model informed by data from high-altitude observations and the latest climate change scenarios to quantify the climate change impact on water resources of two contrasting catchments vulnerable to changes in the cryosphere. The two study catchments are located in the Central Andes of Chile and in the Nepalese Himalaya in close vicinity of densely populated areas. Although both sites reveal a strong decrease in glacier area, they show a remarkably different hydrological response to projected climate change. In the Juncal catchment in Chile, runoff is likely to sharply decrease in the future and the runoff seasonality is sensitive to projected climatic changes. In the Langtang catchment in Nepal, future water availability is on the rise for decades to come with limited shifts between seasons. Owing to the high spatiotemporal resolution of the simulations and process complexity included in the modeling, the response times and the mechanisms underlying the variations in glacier area and river flow can be well constrained. The projections indicate that climate change adaptation in Central Chile should focus on dealing with a reduction in water availability, whereas in Nepal preparedness for flood extremes should be the policy priority.
英文关键词	Climate change; Glaciers; High-altitude water cycle; Hydrological modeling; River flow
语种	英语
scopus关键词	water; altitude; Article; catchment; Chile; climate change; cryosphere; glacier; hydrology; Nepal; priority journal; river; runoff; seasonal variation; water flow; water supply; altitude; ice cover; river; season; water flow; Altitude; Chile; Climate Change; Hydrology; Ice Cover; Nepal; Rivers; Seasons; Water Movements
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158902
作者单位	Ragettli, S., AInstitute of Environmental Engineering, ETH Zurich, Zurich, 8093, Switzerland; Immerzeel, W.W., Department of Physical Geography, Utrecht University, Utrecht, TC, Netherlands; Pellicciotti, F., Department of Geography, Northumbria University, Newcastle upon Tyne, NE1 8ST, United Kingdom
推荐引用方式 GB/T 7714	Ragettli S.,Immerzeel W.W.,Pellicciotti F.. Contrasting climate change impact on river flows from high-altitude catchments in the Himalayan and Andes Mountains[J],2016,113(33).
APA	Ragettli S.,Immerzeel W.W.,&Pellicciotti F..(2016).Contrasting climate change impact on river flows from high-altitude catchments in the Himalayan and Andes Mountains.Proceedings of the National Academy of Sciences of the United States of America,113(33).
MLA	Ragettli S.,et al."Contrasting climate change impact on river flows from high-altitude catchments in the Himalayan and Andes Mountains".Proceedings of the National Academy of Sciences of the United States of America 113.33(2016).