Multimodel assessment of water scarcity under climate change
文献类型：SCI/SSCI论文
| 作者 | Schewe J. ; Heinke J. ; Gerten D. ; Haddeland I. ; Arnell N. W. ; Clark D. B. ; Dankers R. ; Eisner S. ; Fekete B. M. ; Colon-Gonzalez F. J. ; Gosling S. N. ; Kim H. ; Liu X. C. ; Masaki Y. ; Portmann F. T. ; Satoh Y. ; Stacke T. ; Tang Q. H. ; Wada Y. ; Wisser D. ; Albrecht T. ; Frieler K. ; Piontek F. ; Warszawski L. ; Kabat P. |
| 发表日期 | 2014 |
| 关键词 | climate impacts hydrological modeling Inter-Sectoral Impact Model Intercomparison Project future food-production model description bias correction river runoff resources availability vulnerability uncertainty scenarios trends |
| 英文摘要 | Water scarcity severely impairs food security and economic prosperity in many countries today. Expected future population changes will, in many countries as well as globally, increase the pressure on available water resources. On the supply side, renewable water resources will be affected by projected changes in precipitation patterns, temperature, and other climate variables. Here we use a large ensemble of global hydrological models (GHMs) forced by five global climate models and the latest greenhouse-gas concentration scenarios (Representative Concentration Pathways) to synthesize the current knowledge about climate change impacts on water resources. We show that climate change is likely to exacerbate regional and global water scarcity considerably. In particular, the ensemble average projects that a global warming of 2 degrees C above present (approximately 2.7 degrees C above preindustrial) will confront an additional approximate 15% of the global population with a severe decrease in water resources and will increase the number of people living under absolute water scarcity (< 500 m(3) per capita per year) by another 40% (according to some models, more than 100%) compared with the effect of population growth alone. For some indicators of moderate impacts, the steepest increase is seen between the present day and 2 degrees C, whereas indicators of very severe impacts increase unabated beyond 2 degrees C. At the same time, the study highlights large uncertainties associated with these estimates, with both global climate models and GHMs contributing to the spread. GHM uncertainty is particularly dominant in many regions affected by declining water resources, suggesting a high potential for improved water resource projections through hydrological model development. |
| 出处 | Proceedings of the National Academy of Sciences of the United States of America |
| 卷 | 111 |
| 期 | 9 |
| 页 | 3245-3250 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0027-8424 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29631]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Schewe J.,Heinke J.,Gerten D.,et al. Multimodel assessment of water scarcity under climate change. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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