| 论文题目： | Potential role of permafrost thaw on increasing Siberian river discharge |
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| 第一作者： | Wang Ping; Huang Qiwei; Pozdniakov Sergey P.; Liu Shiqi; Ma Ning etc. |
| 联系作者： | |
| 发表年度： | 2021 |
| 摘 要： | Despite the increasing Siberian river discharge, the sensitivity of streamflow to climate forcing/permafrost thawing is poorly quantified. Based on the Budyko framework and superposition principles, we detected and attributed the changes in streamflow regimes for the three great Siberian rivers (Ob, Yenisei, and Lena) during 1936-2019. Over the past 84 years, streamflow of Ob, Yenisei and Lena has increased by similar to 7.7%, 7.4% and 22.0%, respectively. Intensified precipitation induced by a warming climate is a major contributor to increased annual streamflow. However, winter streamflow appears to be particularly sensitive to temperature. Whilst rising temperature can reduce streamflow via evapotranspiration, it can enhance groundwater discharge to rivers due to permafrost thawing. Currently, every 1 degrees C rise in temperature likely leads to 6.1%-10.5% increase in groundwater discharge, depending on the permafrost condition. For permafrost-developed basins, the contribution to increased streamflow from thawing permafrost will continue to increase in the context of global warming. |
| 英文摘要： | Despite the increasing Siberian river discharge, the sensitivity of streamflow to climate forcing/permafrost thawing is poorly quantified. Based on the Budyko framework and superposition principles, we detected and attributed the changes in streamflow regimes for the three great Siberian rivers (Ob, Yenisei, and Lena) during 1936-2019. Over the past 84 years, streamflow of Ob, Yenisei and Lena has increased by similar to 7.7%, 7.4% and 22.0%, respectively. Intensified precipitation induced by a warming climate is a major contributor to increased annual streamflow. However, winter streamflow appears to be particularly sensitive to temperature. Whilst rising temperature can reduce streamflow via evapotranspiration, it can enhance groundwater discharge to rivers due to permafrost thawing. Currently, every 1 degrees C rise in temperature likely leads to 6.1%-10.5% increase in groundwater discharge, depending on the permafrost condition. For permafrost-developed basins, the contribution to increased streamflow from thawing permafrost will continue to increase in the context of global warming. |
| 刊物名称： | ENVIRONMENTAL RESEARCH LETTERS |
| 全文链接： | |
| 论文类别： | SCI |
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