| Permafrost and taliks and their changes on the south and north banks of the Tuotuo River in the Qinghai-Tibet Plateau under the climate warming北大核心CSCD |
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| 引用本文： | 卫丁,赵廷虎,穆彦虎,刘富荣,丁泽琨,刘自成.Permafrost and taliks and their changes on the south and north banks of the Tuotuo River in the Qinghai-Tibet Plateau under the climate warming北大核心CSCD[J].冰川冻土,2022,44(2):427-436. |
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| 作者姓名： | 卫丁 赵廷虎 穆彦虎 刘富荣 丁泽琨 刘自成 |
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| 作者单位： | 1.中国人民解放军32378部队，北京 100072;2.中国水利水电第六工程局有限公司，辽宁 沈阳 110179;3.中国科学院 西北生态环境资源研究院，甘肃 兰州 730000;4.中国科学院大学，北京 100049;5.中国电建集团贵阳勘测设计研究院有限公司，贵州 贵阳 550081 |
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| 基金项目： | 国家自然科学基金项目（41772325）； |
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| 摘 要： | The distribution of permafrost and taliks is very complex in the Tuotuo River Basin(TRB), which is located in interior of the Qinghai-Tibet Plateau. Characterizing the spatial distribution and the thermal stability of permafrost and taliks is of great significance to community activities and engineering construction in TRB. Based on the zonation of permafrost and talik distribution around TRB conducted in the 1980s, the soil temperature and its variation process of permafrost and taliks in the south and north banks of the Tuotuo River were analyzed by using the observation data of five boreholes(N1~N5)along the Qinghai-Tibet Railway in the north bank and five boreholes(S1~S5)on the first terrace in the south bank. The results showed that, under the climate warming, permafrost and taliks in the north banks experienced significant degradation and warming process. From 2005 to 2020, the permafrost at the N1 borehole has undergone a significant down-draw degradation process, from extremely unstable and high-temperature permafrost to thawed zone. From 2005 to 2013, the annual average ground temperature of the talik at N2 increased at a rate of 0. 3~0. 4 °C·(10a)-1. At Maqutang on the south bank, permafrost prevails from the first-class terrace to the gentle slope of the Kaixinling Mountain, with both through and non-through taliks on the first-class terrace. The spatial distribution and the thermal stability of permafrost and talik in the TRB are further promoted by analyzing the changes in temperatures at boreholes in the basin. However, to meet the requirements of mapping and engineering construction of permafrost and taliks in the TRB, it is still necessary to carry out geological investigation with multiple methods and in-depth research on development mechanism of taliks in the future. © 2022 Nanjing Forestry University. All rights reserved.
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| 关 键 词： | 青藏高原 沱沱河盆地 多年冻土 融区 地温 |
| 收稿时间： | 2022-03-28 |
| 修稿时间： | 2022-04-12 |
Permafrost and taliks and their changes on the south and north banks of the Tuotuo River in the Qinghai-Tibet Plateau under the climate warming |
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| Ding WEI,Tinghu ZHAO,Yanhu MU,Furong LIU,Zekun DING,Zicheng LIU.Permafrost and taliks and their changes on the south and north banks of the Tuotuo River in the Qinghai-Tibet Plateau under the climate warming[J].Journal of Glaciology and Geocryology,2022,44(2):427-436. |
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| Authors: | Ding WEI Tinghu ZHAO Yanhu MU Furong LIU Zekun DING Zicheng LIU |
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| Affiliation: | 1.PLA Unit 32378，Beijing 100072，China;2.Sinohydro Bureau 6 Co. ，Ltd. ，Power China，Shenyang 110179，China;3.State Key Laboratory of Frozen Soil Engineering，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China;4.University of Chinese Academy of Science，Beijing 100049，China;5.Guiyang Engineering Corporation Limited，Power China，Guiyang 550081，China |
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| Abstract: | The distribution of permafrost and taliks is very complex in the Tuotuo River Basin （TRB）， which is located in interior of the Qinghai-Tibet Plateau. Characterizing the spatial distribution and the thermal stability of permafrost and taliks is of great significance to community activities and engineering construction in TRB. Based on the zonation of permafrost and talik distribution around TRB conducted in the 1980s， the soil temperature and its variation process of permafrost and taliks in the south and north banks of the Tuotuo River were analyzed by using the observation data of five boreholes （N1~N5） along the Qinghai-Tibet Railway in the north bank and five boreholes （S1~S5） on the first terrace in the south bank. The results showed that， under the climate warming， permafrost and taliks in the north banks experienced significant degradation and warming process. From 2005 to 2020， the permafrost at the N1 borehole has undergone a significant down-draw degradation process， from extremely unstable and high-temperature permafrost to thawed zone. From 2005 to 2013， the annual average ground temperature of the talik at N2 increased at a rate of 0.3~0.4 °C·（10a）-1. At Maqutang on the south bank， permafrost prevails from the first-class terrace to the gentle slope of the Kaixinling Mountain， with both through and non-through taliks on the first-class terrace. The spatial distribution and the thermal stability of permafrost and talik in the TRB are further promoted by analyzing the changes in temperatures at boreholes in the basin. However， to meet the requirements of mapping and engineering construction of permafrost and taliks in the TRB， it is still necessary to carry out geological investigation with multiple methods and in-depth research on development mechanism of taliks in the future. |
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| Keywords: | Qinghai-Tibet Plateau Tuotuo River Basin permafrost talik ground temperature |
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