Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau
Precipitation has a significant influence on the hydro-thermal state of the active layer in permafrost regions, which disturbs the surface energy balance, carbon flux, ecosystem, hydrological cycles and landscape processes. To better understand the hydro-thermal dynamics of active layer and the inte...
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ftchinacadscimhe:oai:ir.imde.ac.cn:131551/46430 2023-05-15T13:03:14+02:00 Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau Li De-sheng Wen Zhi Cheng Qian-gong Xing Ai-guo Zhang Ming-li Li An-yuan 2019 http://ir.imde.ac.cn/handle/131551/46430 https://doi.org/10.1007/s11629-018-5153-5 英语 eng JOURNAL OF MOUNTAIN SCIENCE http://ir.imde.ac.cn/handle/131551/46430 doi:10.1007/s11629-018-5153-5 cn.org.cspace.api.content.CopyrightPolicy@12f773ea Active layer Precipitation Qinghai-Tibet plateau Hydro-thermal dynamic Article 期刊论文 2019 ftchinacadscimhe https://doi.org/10.1007/s11629-018-5153-5 2022-12-19T18:26:27Z Precipitation has a significant influence on the hydro-thermal state of the active layer in permafrost regions, which disturbs the surface energy balance, carbon flux, ecosystem, hydrological cycles and landscape processes. To better understand the hydro-thermal dynamics of active layer and the interactions between rainfall and permafrost, we applied the coupled heat and mass transfer model for soil-plant-atmosphere system into high-altitude permafrost regions in this study. Meteorological data, soil temperature, heat flux and moisture content from different depths within the active layer were used to calibrate and validate this model. Thereafter, the precipitation was increased to explore the effect of recent climatic wetting on the thermal state of the active layer. The primary results demonstrate that the variation of active layer thickness under the effect of short-term increased precipitation is not obvious, while soil surface heat flux can show the changing trends of thermal state in active layer, which should not be negligible. An increment in year-round precipitation leads to a cooling effect on active layers in the frozen season, i.e. verifying the insulating effect of snow cover. However, in the thawed season, the increased precipitation created a heating effect on active layers, i.e. facilitating the degradation of permafrost. The soil thermal dynamic in single precipitation event reveals that the precipitation event seems to cool the active layer, while compared with the results under increased precipitation, climatic wetting trend has a different influence on the permafrost evolution. Article in Journal/Newspaper Active layer thickness permafrost IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) Journal of Mountain Science 16 2 309 322 |
institution |
Open Polar |
collection |
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) |
op_collection_id |
ftchinacadscimhe |
language |
English |
topic |
Active layer Precipitation Qinghai-Tibet plateau Hydro-thermal dynamic |
spellingShingle |
Active layer Precipitation Qinghai-Tibet plateau Hydro-thermal dynamic Li De-sheng Wen Zhi Cheng Qian-gong Xing Ai-guo Zhang Ming-li Li An-yuan Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau |
topic_facet |
Active layer Precipitation Qinghai-Tibet plateau Hydro-thermal dynamic |
description |
Precipitation has a significant influence on the hydro-thermal state of the active layer in permafrost regions, which disturbs the surface energy balance, carbon flux, ecosystem, hydrological cycles and landscape processes. To better understand the hydro-thermal dynamics of active layer and the interactions between rainfall and permafrost, we applied the coupled heat and mass transfer model for soil-plant-atmosphere system into high-altitude permafrost regions in this study. Meteorological data, soil temperature, heat flux and moisture content from different depths within the active layer were used to calibrate and validate this model. Thereafter, the precipitation was increased to explore the effect of recent climatic wetting on the thermal state of the active layer. The primary results demonstrate that the variation of active layer thickness under the effect of short-term increased precipitation is not obvious, while soil surface heat flux can show the changing trends of thermal state in active layer, which should not be negligible. An increment in year-round precipitation leads to a cooling effect on active layers in the frozen season, i.e. verifying the insulating effect of snow cover. However, in the thawed season, the increased precipitation created a heating effect on active layers, i.e. facilitating the degradation of permafrost. The soil thermal dynamic in single precipitation event reveals that the precipitation event seems to cool the active layer, while compared with the results under increased precipitation, climatic wetting trend has a different influence on the permafrost evolution. |
format |
Article in Journal/Newspaper |
author |
Li De-sheng Wen Zhi Cheng Qian-gong Xing Ai-guo Zhang Ming-li Li An-yuan |
author_facet |
Li De-sheng Wen Zhi Cheng Qian-gong Xing Ai-guo Zhang Ming-li Li An-yuan |
author_sort |
Li De-sheng |
title |
Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau |
title_short |
Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau |
title_full |
Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau |
title_fullStr |
Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau |
title_full_unstemmed |
Thermal dynamics of the permafrost active layer under increased precipitation at the Qinghai-Tibet Plateau |
title_sort |
thermal dynamics of the permafrost active layer under increased precipitation at the qinghai-tibet plateau |
publishDate |
2019 |
url |
http://ir.imde.ac.cn/handle/131551/46430 https://doi.org/10.1007/s11629-018-5153-5 |
genre |
Active layer thickness permafrost |
genre_facet |
Active layer thickness permafrost |
op_relation |
JOURNAL OF MOUNTAIN SCIENCE http://ir.imde.ac.cn/handle/131551/46430 doi:10.1007/s11629-018-5153-5 |
op_rights |
cn.org.cspace.api.content.CopyrightPolicy@12f773ea |
op_doi |
https://doi.org/10.1007/s11629-018-5153-5 |
container_title |
Journal of Mountain Science |
container_volume |
16 |
container_issue |
2 |
container_start_page |
309 |
op_container_end_page |
322 |
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1766332008452063232 |