| Effect of climatic change on snowmelt runoffs in mountainous regions of inland rivers in Northwestern China |
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| 基金项目： | 中国科学院资助项目;高比容电子铝箔的研究开发与应用项目 |
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| 摘 要： | Snow is one of the most active natural elements of snow cover through its high albedo, variation of the the cryosphere on the earth surface. Its unique proper- snow cover distribution and frozen soils in regional ties, such as areal extent, surface albedo, and snow scales not only affect local climate and environments, depth are important parameters in global energy bal- but also feedback to large-scale, or even global cli- ance models. On global and terrestrial scales, a large matic change th…
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| 收稿时间： | 9 December 2004 |
| 修稿时间： | 11 April 2005 |
Effect of climatic change on snowmelt runoffs in mountainous regions of inland rivers in Northwestern China |
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| Authors: | WANG Jian LI Shuo |
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| Institution: | 1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
2. College of Geography, Nanjing Normal University, Nanjing 210097, China |
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| Abstract: | Climatic change has significant impacts on snow cover in mid-latitude mountainous regions, in the meantime, spatial and temporal
changes of snow cover and snowmelt runoffs are considered as sensitive indicators for climatic change. In this study, the
upper Heihe Watershed in the Qilian Mountains was selected as a typical area affected by snow cover and snowmelt runoffs in
northwestern China. The changes in air temperatures, precipitation, snowfall and spring snowmelt runoffs were analyzed for
the period from 1956 to 2001. The results indicate that climatic warming was apparent, particularly in January and February,
but precipitation just fluctuated without a clear trend. The possible changes of snowmelt runoffs in the upper Heihe watershed
in response to a warming of 4°C were simulated using Snowmelt Runoff Model (SRM) based on the degree-day factor algorithm.
The results of the simulation indicate that a forward shifting of snow melting season, an increase in water flows in earlier
melting season, and a decline in flows in later melting season would occur under a 4°C warming scenario. |
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| Keywords: | climatic changes snowmelt runoff SRM model upper Heihe Watershed simulating |
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