Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the Qinghai–Tibet plateau
Abstract As a result of global warming induced permafrost degradation in recent decades, thermokarst lakes in the Qinghai–Tibet plateau (QTP) have been regulating local hydrological and ecological processes. Simulations with coupled moisture–heat numerical models in the Beiluhe basin (located in the...
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crwiley:10.1002/hyp.14443 2024-06-23T07:44:56+00:00 Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the Qinghai–Tibet plateau Li, Jinlong Wang, Wei Ke, Xianmin Li, Jianhua Yu, Yating Gao, Zeyong Niu, Fujun Fundamental Research Funds for the Central Universities National Natural Science Foundation of China Chinese Academy of Sciences 2021 http://dx.doi.org/10.1002/hyp.14443 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.14443 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/hyp.14443 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 35, issue 12 ISSN 0885-6087 1099-1085 journal-article 2021 crwiley https://doi.org/10.1002/hyp.14443 2024-05-31T08:12:47Z Abstract As a result of global warming induced permafrost degradation in recent decades, thermokarst lakes in the Qinghai–Tibet plateau (QTP) have been regulating local hydrological and ecological processes. Simulations with coupled moisture–heat numerical models in the Beiluhe basin (located in the hinterland of permafrost regions on the QTP) have provided insights into the interaction between groundwater flow and the freeze–thaw process. A total of 30 modified SUTRA scenarios were established to examine the effects of hydrodynamic forces, permeability, and climate on thermokarst lakes. The results indicate that the hydrodynamic condition variables regulate the permafrost degradation around the lakes. In case groundwater recharges to the lake, a low–temperature groundwater flow stimulates the expansion of the surrounding thawing regions through thermal convection. The thawing rate of the permafrost underlying the lake intensifies when groundwater is discharged from the lake. Under different permeability conditions, spatiotemporal variations in the active layer thickness significantly influence the occurrence of an open talik at the lake bottom. A warmer and wetter climate will inevitably lead to a sharp decrease in the upper limit of the surrounding permafrost, with a continual decrease in the duration of open talik events. Overall, our results underscore that comprehensive consideration of the relevant hydrologic processes is critical for improving the understanding of environmental and ecological changes in cold environments. Article in Journal/Newspaper Active layer thickness permafrost Talik Thermokarst Wiley Online Library Talik ENVELOPE(146.601,146.601,59.667,59.667) Hydrological Processes 35 12 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract As a result of global warming induced permafrost degradation in recent decades, thermokarst lakes in the Qinghai–Tibet plateau (QTP) have been regulating local hydrological and ecological processes. Simulations with coupled moisture–heat numerical models in the Beiluhe basin (located in the hinterland of permafrost regions on the QTP) have provided insights into the interaction between groundwater flow and the freeze–thaw process. A total of 30 modified SUTRA scenarios were established to examine the effects of hydrodynamic forces, permeability, and climate on thermokarst lakes. The results indicate that the hydrodynamic condition variables regulate the permafrost degradation around the lakes. In case groundwater recharges to the lake, a low–temperature groundwater flow stimulates the expansion of the surrounding thawing regions through thermal convection. The thawing rate of the permafrost underlying the lake intensifies when groundwater is discharged from the lake. Under different permeability conditions, spatiotemporal variations in the active layer thickness significantly influence the occurrence of an open talik at the lake bottom. A warmer and wetter climate will inevitably lead to a sharp decrease in the upper limit of the surrounding permafrost, with a continual decrease in the duration of open talik events. Overall, our results underscore that comprehensive consideration of the relevant hydrologic processes is critical for improving the understanding of environmental and ecological changes in cold environments. |
author2 |
Fundamental Research Funds for the Central Universities National Natural Science Foundation of China Chinese Academy of Sciences |
format |
Article in Journal/Newspaper |
author |
Li, Jinlong Wang, Wei Ke, Xianmin Li, Jianhua Yu, Yating Gao, Zeyong Niu, Fujun |
spellingShingle |
Li, Jinlong Wang, Wei Ke, Xianmin Li, Jianhua Yu, Yating Gao, Zeyong Niu, Fujun Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the Qinghai–Tibet plateau |
author_facet |
Li, Jinlong Wang, Wei Ke, Xianmin Li, Jianhua Yu, Yating Gao, Zeyong Niu, Fujun |
author_sort |
Li, Jinlong |
title |
Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the Qinghai–Tibet plateau |
title_short |
Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the Qinghai–Tibet plateau |
title_full |
Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the Qinghai–Tibet plateau |
title_fullStr |
Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the Qinghai–Tibet plateau |
title_full_unstemmed |
Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the Qinghai–Tibet plateau |
title_sort |
impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost–dominated region on the qinghai–tibet plateau |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/hyp.14443 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.14443 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/hyp.14443 |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Talik |
geographic_facet |
Talik |
genre |
Active layer thickness permafrost Talik Thermokarst |
genre_facet |
Active layer thickness permafrost Talik Thermokarst |
op_source |
Hydrological Processes volume 35, issue 12 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.14443 |
container_title |
Hydrological Processes |
container_volume |
35 |
container_issue |
12 |
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1802640988164849664 |