Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073322 |
The rapid yet uneven turnover of Earth's groundwater | |
Befus, Kevin M.1; Jasechko, Scott2; Luijendijk, Elco3; Gleeson, Tom4; Cardenas, M. Bayani5 | |
2017-06-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada; Germany |
英文摘要 | The turnover of groundwater through recharge drives many processes throughout Earth's surface and subsurface. Yet groundwater turnover rates and their relationship to regional climate and geology remain largely unknown. We estimated that over 200x10(6)km(3) of groundwater has recharged since the Last Glacial Maximum (LGM), which is 10 times the volume of global groundwater storage. However, flushing is very unevenly distributed throughout Earth's one million watersheds, with some aquifers turned over thousands of times to others with <1% turnover. The median global groundwater turnover of 53 times since the LGM highlights groundwater's active role in Earth system processes. Incomplete groundwater turnover since the LGM beneath a third of land areas reveals the imprint of relict climate conditions on modern-day groundwater resources. The bulk groundwater turnover calculated here enables better quantification of groundwater's impact in dynamic global water budgets and the transport of nutrients, contaminants, and geologic weathering products. Plain Language Summary The duration groundwater spends in an aquifer sets how long it is sequestered from the rest of the hydrologic cycle, where it can interact with the surrounding matrix and transport dissolved chemicals to and from the land surface. Over geologic timescales, these interactions transform landscapes, affect global climate, and regulate water resource sustainability and quality. We present how much groundwater has recharged since the Last Glacial Maximum and where groundwater on Earth is associated with previous climate conditions. |
英文关键词 | groundwater turnover groundwater flushing groundwater recharge climate change Last Glacial Maximum |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404382600031 |
WOS关键词 | CLIMATE ; RECHARGE ; WATER ; O-18 |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27990 |
专题 | 气候变化 |
作者单位 | 1.Univ Wyoming, Civil & Architectural Engn, Laramie, WY 82071 USA; 2.Univ Calgary, Dept Geog, Calgary, AB, Canada; 3.Georg August Univ Gottingen, Geosci Ctr, Gottingen, Germany; 4.Univ Victoria, Civil Engn, Victoria, BC, Canada; 5.Univ Texas Austin, Dept Geol Sci, Austin, TX USA |
推荐引用方式 GB/T 7714 | Befus, Kevin M.,Jasechko, Scott,Luijendijk, Elco,et al. The rapid yet uneven turnover of Earth's groundwater[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(11). |
APA | Befus, Kevin M.,Jasechko, Scott,Luijendijk, Elco,Gleeson, Tom,&Cardenas, M. Bayani.(2017).The rapid yet uneven turnover of Earth's groundwater.GEOPHYSICAL RESEARCH LETTERS,44(11). |
MLA | Befus, Kevin M.,et al."The rapid yet uneven turnover of Earth's groundwater".GEOPHYSICAL RESEARCH LETTERS 44.11(2017). |
条目包含的文件 | 条目无相关文件。 |
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