Majority of global river flow sustained by groundwater
文献类型：期刊论文
| 作者 | Xie, Jiaxin2,3,5; Liu, Xiaomang3; Jasechko, Scott1; Berghuijs, Wouter R.4; Wang, Kaiwen3; Liu, Changming3; Reichstein, Markus5,6; Jung, Martin5; Koirala, Sujan5 |
| 刊名 | NATURE GEOSCIENCE
 |
| 出版日期 | 2024-07-19 |
| 卷号 | N/A |
| DOI | 10.1038/s41561-024-01483-5 |
| 产权排序 | 1 |
| 文献子类 | Article ; Early Access |
| 英文摘要 | Groundwater-sustained baseflow is a vital source of river flow, especially during dry seasons. The proportion of river flow sustained by baseflow-the baseflow index-is essential for assessing fluvial nutrient cycling and contaminant transport. However, the global baseflow index remains highly uncertain, with current Earth system model simulations ranging from 12% to 94%. Here we estimate the global baseflow index to be 59% +/- 7% based on an emergent constraint approach, which integrates 50 Earth system models with baseflow indices derived from streamflow observations in 15,567 basins. Our observational constraint indicates that at least 21% +/- 3% of precipitation recharges groundwater, which is approximately double the figure reported in the Sixth Assessment Report of the United Nations Intergovernmental Panel on Climate Change. Thus, our research suggests a more active role of groundwater in the global water cycle than most Earth system models currently simulate. We present evidence that the considerable disagreement in simulated baseflow stems from unrealistic and varied model representations of infiltration, aquifer structure and groundwater dynamics. These processes should be prioritized so that models can capture active groundwater-river connections. Groundwater supplies about 59% of global river flow, suggesting a larger contribution of groundwater to the global water cycle than currently appreciated, according to an analysis integrating estimates from models and observations. |
| WOS关键词 | COMMUNITY LAND MODEL ; BASE-FLOW ; EMERGENT CONSTRAINTS ; AUTOMATED TECHNIQUES ; WATER-RESOURCES ; TECHNICAL NOTE ; STREAMFLOW ; SENSITIVITY ; SEPARATION ; INDEX |
| WOS研究方向 | Geology |
| WOS记录号 | WOS:001272944300001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/206146]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Liu, Xiaomang |
| 作者单位 | 1.Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA USA 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 4.Free Univ Amsterdam, Dept Earth Sci, Amsterdam, Netherlands 5.Max Planck Inst Biogeochem, Dept Biogeochem Integrat, Jena, Germany 6.ELLIS Unit Jena, Jena, Germany |
| 推荐引用方式 GB/T 7714 | Xie, Jiaxin,Liu, Xiaomang,Jasechko, Scott,et al. Majority of global river flow sustained by groundwater[J]. NATURE GEOSCIENCE,2024,N/A. |
| APA | Xie, Jiaxin.,Liu, Xiaomang.,Jasechko, Scott.,Berghuijs, Wouter R..,Wang, Kaiwen.,...&Koirala, Sujan.(2024).Majority of global river flow sustained by groundwater.NATURE GEOSCIENCE,N/A. |
| MLA | Xie, Jiaxin,et al."Majority of global river flow sustained by groundwater".NATURE GEOSCIENCE N/A(2024). |
入库方式： OAI收割
来源：地理科学与资源研究所
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