Permafrost dynamics and their hydrologic impacts over the Russian Arctic drainage basin
Permafrost is an important component in hydrological processes because changes in runoff over the Arctic drainage basin cannot be well explained by changes in precipitation-related variables. However, current understanding of the influences of permafrost on hydrological dynamics is insufficient. Thi...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-08-01
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| Series: | Advances in Climate Change Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674927821000538 |
| _version_ | 1828923649088815104 |
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| author | Kang Wang Tingjun Zhang Daqing Yang |
| author_facet | Kang Wang Tingjun Zhang Daqing Yang |
| author_sort | Kang Wang |
| collection | DOAJ |
| description | Permafrost is an important component in hydrological processes because changes in runoff over the Arctic drainage basin cannot be well explained by changes in precipitation-related variables. However, current understanding of the influences of permafrost on hydrological dynamics is insufficient. This study investigated historical variations in permafrost conditions and their potential hydrologic effects over the Russian Arctic drainage basin. The results show that soil temperature (at 0.40 m below surface) has increased about 1.4 °C over the Ob, 1.5 °C over the Yenisei, and 1.8 °C over the Lena River basin from 1936 through 2013, possibly resulted in a significant thawing of permafrost. Rapid active layer changes have occurred since the 1970s. The volume of the active layer increased by 28, 142, and 228 km3 over the Ob, Yenisei, and Lena basins, respectively, since the 1970s. Melting ground ice caused by deepening active layer may be a limited contribution to annual runoff. Runoff during freeze season (October–April) showed significant positive correlations (p < 0.05) to active layer thickness in the Yenisei and Lena basins while negative correlation (p > 0.05) in the Ob basin. These results imply that, in basins with high permafrost coverage, a deeper active layer increased soil water storage capacity and perhaps contribute to an increase in winter runoff. |
| first_indexed | 2024-12-13T22:41:51Z |
| format | Article |
| id | doaj.art-4baa6bd0d0314b349df679e8686b9338 |
| institution | Directory Open Access Journal |
| issn | 1674-9278 |
| language | English |
| last_indexed | 2024-12-13T22:41:51Z |
| publishDate | 2021-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Advances in Climate Change Research |
| spelling | doaj.art-4baa6bd0d0314b349df679e8686b93382022-12-21T23:28:49ZengKeAi Communications Co., Ltd.Advances in Climate Change Research1674-92782021-08-01124482498Permafrost dynamics and their hydrologic impacts over the Russian Arctic drainage basinKang Wang0Tingjun Zhang1Daqing Yang2School of Geographic Sciences, East China Normal University, Shanghai, 200241, ChinaMOE Key Laboratory of Western China's Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; University Cooperation for Polar Research (UCPR), Beijing, 100875, China; Corresponding author. MOE Key Laboratory of Western China's Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.Watershed Hydrology and Ecology Division, Environment and Climate Change Canada, Victoria, BC V8W 3R4, CanadaPermafrost is an important component in hydrological processes because changes in runoff over the Arctic drainage basin cannot be well explained by changes in precipitation-related variables. However, current understanding of the influences of permafrost on hydrological dynamics is insufficient. This study investigated historical variations in permafrost conditions and their potential hydrologic effects over the Russian Arctic drainage basin. The results show that soil temperature (at 0.40 m below surface) has increased about 1.4 °C over the Ob, 1.5 °C over the Yenisei, and 1.8 °C over the Lena River basin from 1936 through 2013, possibly resulted in a significant thawing of permafrost. Rapid active layer changes have occurred since the 1970s. The volume of the active layer increased by 28, 142, and 228 km3 over the Ob, Yenisei, and Lena basins, respectively, since the 1970s. Melting ground ice caused by deepening active layer may be a limited contribution to annual runoff. Runoff during freeze season (October–April) showed significant positive correlations (p < 0.05) to active layer thickness in the Yenisei and Lena basins while negative correlation (p > 0.05) in the Ob basin. These results imply that, in basins with high permafrost coverage, a deeper active layer increased soil water storage capacity and perhaps contribute to an increase in winter runoff.http://www.sciencedirect.com/science/article/pii/S1674927821000538PermafrostActive layerHydrologic responseArcticRussia |
| spellingShingle | Kang Wang Tingjun Zhang Daqing Yang Permafrost dynamics and their hydrologic impacts over the Russian Arctic drainage basin Advances in Climate Change Research Permafrost Active layer Hydrologic response Arctic Russia |
| title | Permafrost dynamics and their hydrologic impacts over the Russian Arctic drainage basin |
| title_full | Permafrost dynamics and their hydrologic impacts over the Russian Arctic drainage basin |
| title_fullStr | Permafrost dynamics and their hydrologic impacts over the Russian Arctic drainage basin |
| title_full_unstemmed | Permafrost dynamics and their hydrologic impacts over the Russian Arctic drainage basin |
| title_short | Permafrost dynamics and their hydrologic impacts over the Russian Arctic drainage basin |
| title_sort | permafrost dynamics and their hydrologic impacts over the russian arctic drainage basin |
| topic | Permafrost Active layer Hydrologic response Arctic Russia |
| url | http://www.sciencedirect.com/science/article/pii/S1674927821000538 |
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