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| DOI | 10.1029/2023WR035913 |
| Spatial-Temporal Differentiation of Supra- and Sub-Permafrost Groundwater Contributions to River Runoff in the Eurasian Arctic and Qinghai-Tibet Plateau Permafrost Regions | |
| 发表日期 | 2024 |
| ISSN | 0043-1397 |
| EISSN | 1944-7973 |
| 起始页码 | 60 |
| 结束页码 | 3 |
| 卷号 | 60期号:3 |
| 英文摘要 | Supra- and sub-permafrost groundwater are the two main components of groundwater in permafrost regions. However, due to the lack of groundwater observational data, the spatial-temporal differentiation of these groundwater components in permafrost basins remains unclear. Based on flow data from 17 hydrological stations in five permafrost rivers within the Eurasian Arctic and Qinghai-Tibet Plateau permafrost regions, this study tries to determine the proportion of supra- and sub-permafrost groundwater through the corresponding relationship between baseflow separation and baseflow index. The results showed that the annual average contribution of supra- and sub-permafrost groundwater in river runoff to total streamflow in the Yangtze River source basin was 36.81% and 14.56%, respectively. Correspondingly, the Yellow River source basin was 36.58% and 24.46%, the Ob River basin was 37.05% and 26.83%, the Yenisei River basin was 28.80% and 36.56%, and the Lena River basin was 39.13% and 9.54%. Over the past 50-80 years, the ratio of sub-permafrost groundwater discharge to river runoff and the flux of sub-permafrost groundwater have shown an increasing trend in all study basins, which was significantly affected by air temperature and permafrost area. Relative contribution of supra-permafrost groundwater exhibits a significant positive correlation with precipitation and permafrost area. Air temperature has both positive and negative effects on supra-permafrost groundwater discharge, leading to a rising or falling trend of supra-permafrost groundwater discharge. In the future, it is necessary to further explore the complex effects of groundwater discharge variations on streamflow in permafrost regions under climate warming. |
| 英文关键词 | permafrost; groundwater components; supra-permafrost groundwater; sub-permafrost groundwater; ungauged basins |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
| WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
| WOS记录号 | WOS:001185717900001 |
| 来源期刊 | WATER RESOURCES RESEARCH
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/289080 |
| 作者单位 | Chinese Academy of Sciences; Institute of Mountain Hazards & Environment, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Sichuan University |
| 推荐引用方式 GB/T 7714 | . Spatial-Temporal Differentiation of Supra- and Sub-Permafrost Groundwater Contributions to River Runoff in the Eurasian Arctic and Qinghai-Tibet Plateau Permafrost Regions[J],2024,60(3). |
| APA | (2024).Spatial-Temporal Differentiation of Supra- and Sub-Permafrost Groundwater Contributions to River Runoff in the Eurasian Arctic and Qinghai-Tibet Plateau Permafrost Regions.WATER RESOURCES RESEARCH,60(3). |
| MLA | "Spatial-Temporal Differentiation of Supra- and Sub-Permafrost Groundwater Contributions to River Runoff in the Eurasian Arctic and Qinghai-Tibet Plateau Permafrost Regions".WATER RESOURCES RESEARCH 60.3(2024). |
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