Thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the Qinghai–Tibet Plateau
Abstract Both the inflow and outflow of supra‐permafrost water to lakes play important roles in the hydrologic process of thermokarst lakes. The accompanying thermal effects on the adjacent permafrost are required for assessing their influences on the development of thermokarst lakes. For these purp...
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crwiley:10.1002/hyp.11193 2024-09-15T17:34:49+00:00 Thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the Qinghai–Tibet Plateau You, Yanhui Yu, Qihao Pan, Xicai Wang, Xinbin Guo, Lei Wu, Qingbai China Postdoctoral Science Foundation 2017 http://dx.doi.org/10.1002/hyp.11193 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.11193 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.11193 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 31, issue 13, page 2429-2437 ISSN 0885-6087 1099-1085 journal-article 2017 crwiley https://doi.org/10.1002/hyp.11193 2024-08-20T04:16:18Z Abstract Both the inflow and outflow of supra‐permafrost water to lakes play important roles in the hydrologic process of thermokarst lakes. The accompanying thermal effects on the adjacent permafrost are required for assessing their influences on the development of thermokarst lakes. For these purposes, the lake water level, temperature dynamics, and supra‐permafrost water flow of a lake were monitored on the Qinghai‐Tibet Plateau. In addition, the spatial and temporal variation of the active layer thickness and permafrost distribution around the lake were investigated by combining ground penetrating radar, electrical resistivity tomography, and borehole temperature monitoring. The results revealed that the yearly unfrozen supra‐permafrost water flow around the lake lasted approximately 5 months. The temperature and water level measurements during this period indicate that the lake water was recharged by relatively colder supra‐permafrost water from the north‐western lakeshore and was discharged through the eastern lakeshore. This process, accompanied by heat exchange with the underlying permafrost, might cause a directional difference of the active layer thickness and permafrost characteristics around the lake. Specifically, the active layer thickness variation was minimal, and the ice‐rich permafrost was found adjacent to the lakeshore along the recharge groundwater pathways, whereas a deeper active layer and ice‐poor permafrost were observed close to the lakeshore from which the warm lake water was discharged. This study suggests that the lateral flow of warm lake water can be a major driver for the rapid expansion of thermokarst lakes and provides clues for evaluating the relationships between the thermokarst expansion process and climate warming. Article in Journal/Newspaper Active layer thickness Ice permafrost Thermokarst Wiley Online Library Hydrological Processes 31 13 2429 2437 |
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Wiley Online Library |
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English |
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Abstract Both the inflow and outflow of supra‐permafrost water to lakes play important roles in the hydrologic process of thermokarst lakes. The accompanying thermal effects on the adjacent permafrost are required for assessing their influences on the development of thermokarst lakes. For these purposes, the lake water level, temperature dynamics, and supra‐permafrost water flow of a lake were monitored on the Qinghai‐Tibet Plateau. In addition, the spatial and temporal variation of the active layer thickness and permafrost distribution around the lake were investigated by combining ground penetrating radar, electrical resistivity tomography, and borehole temperature monitoring. The results revealed that the yearly unfrozen supra‐permafrost water flow around the lake lasted approximately 5 months. The temperature and water level measurements during this period indicate that the lake water was recharged by relatively colder supra‐permafrost water from the north‐western lakeshore and was discharged through the eastern lakeshore. This process, accompanied by heat exchange with the underlying permafrost, might cause a directional difference of the active layer thickness and permafrost characteristics around the lake. Specifically, the active layer thickness variation was minimal, and the ice‐rich permafrost was found adjacent to the lakeshore along the recharge groundwater pathways, whereas a deeper active layer and ice‐poor permafrost were observed close to the lakeshore from which the warm lake water was discharged. This study suggests that the lateral flow of warm lake water can be a major driver for the rapid expansion of thermokarst lakes and provides clues for evaluating the relationships between the thermokarst expansion process and climate warming. |
author2 |
China Postdoctoral Science Foundation |
format |
Article in Journal/Newspaper |
author |
You, Yanhui Yu, Qihao Pan, Xicai Wang, Xinbin Guo, Lei Wu, Qingbai |
spellingShingle |
You, Yanhui Yu, Qihao Pan, Xicai Wang, Xinbin Guo, Lei Wu, Qingbai Thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the Qinghai–Tibet Plateau |
author_facet |
You, Yanhui Yu, Qihao Pan, Xicai Wang, Xinbin Guo, Lei Wu, Qingbai |
author_sort |
You, Yanhui |
title |
Thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the Qinghai–Tibet Plateau |
title_short |
Thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the Qinghai–Tibet Plateau |
title_full |
Thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the Qinghai–Tibet Plateau |
title_fullStr |
Thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the Qinghai–Tibet Plateau |
title_full_unstemmed |
Thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the Qinghai–Tibet Plateau |
title_sort |
thermal effects of lateral supra‐permafrost water flow around a thermokarst lake on the qinghai–tibet plateau |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/hyp.11193 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.11193 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.11193 |
genre |
Active layer thickness Ice permafrost Thermokarst |
genre_facet |
Active layer thickness Ice permafrost Thermokarst |
op_source |
Hydrological Processes volume 31, issue 13, page 2429-2437 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.11193 |
container_title |
Hydrological Processes |
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31 |
container_issue |
13 |
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2429 |
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2437 |
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1810295403900305408 |