globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2590
论文题名:
The global volume and distribution of modern groundwater
作者: Gleeson T.; Befus K.M.; Jasechko S.; Luijendijk E.; Cardenas M.B.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:2
起始页码: 161
结束页码: 164
语种: 英语
Scopus关键词: age determination ; continental crust ; data assimilation ; data set ; global change ; global perspective ; groundwater ; hydrological cycle ; numerical model ; recharge ; spatial distribution ; tritium ; volume ; vulnerability ; water resource
英文摘要: Groundwater is important for energy and food security, human health and ecosystems. The time since groundwater was recharged-or groundwater age-can be important for diverse geologic processes, such as chemical weathering, ocean eutrophication and climate change. However, measured groundwater ages range from months to millions of years. The global volume and distribution of groundwater less than 50 years old-modern groundwater that is the most recently recharged and also the most vulnerable to global change-are unknown. Here we combine geochemical, geologic, hydrologic and geospatial data sets with numerical simulations of groundwater and analyse tritium ages to show that less than 6% of the groundwater in the uppermost portion of Earth's landmass is modern. We find that the total groundwater volume in the upper 2 km of continental crust is approximately 22.6 million km3, of which 0.1-5.0 million km3 is less than 50 years old. Although modern groundwater represents a small percentage of the total groundwater on Earth, the volume of modern groundwater is equivalent to a body of water with a depth of about 3m spread over the continents. This water resource dwarfs all other components of the active hydrologic cycle. © 2016 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106073
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Department of Civil Engineering, University of Victoria, Victoria, BC, Canada; Department of Civil Engineering, McGill University, Montreal, QC, Canada; Department of Geological Sciences, University of Texas at Austin, Austin, TX, United States; Department of Geography, University of Calgary, Calgary, AB, Canada; Geoscience Centre, Georg-August-Universität Göttingen, Göttingen, Germany

Recommended Citation:
Gleeson T.,Befus K.M.,Jasechko S.,et al. The global volume and distribution of modern groundwater[J]. Nature Geoscience,2016-01-01,9(2)
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