Divergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of Tibetan Plateau during 1960–2019
Since the 20th century, due to global warming, permafrost areas have undergone significant changes. The degradation of permafrost has complicated water cycle processes. Taking the upper Yellow River basin (UYRB) as a demonstration, this study discusses the long-term (1960–2019) changes in frozen gro...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/aca4eb |
| _version_ | 1827869733063491584 |
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| author | Lei Song Lei Wang Jing Zhou Dongliang Luo Xiuping Li |
| author_facet | Lei Song Lei Wang Jing Zhou Dongliang Luo Xiuping Li |
| author_sort | Lei Song |
| collection | DOAJ |
| description | Since the 20th century, due to global warming, permafrost areas have undergone significant changes. The degradation of permafrost has complicated water cycle processes. Taking the upper Yellow River basin (UYRB) as a demonstration, this study discusses the long-term (1960–2019) changes in frozen ground and their hydrological effects with a cryosphere-hydrology model, in particular a permafrost version of the water and energy budget-based distributed hydrological model. The permafrost at the UYRB, with thickening active layer and lengthening thawing duration, has degraded by 10.8%. The seasonally frozen ground has a more pronounced intra-annual regulation that replenishes surface runoff in the warm season, while the degradation of permafrost leads to a runoff increase. The occurrence of extreme events at the UYRB has gradually decreased with the degradation of frozen ground, but spring droughts and autumn floods become more serious. The results may help better understand the hydrological impacts of permafrost degradation in the Tibetan Plateau. |
| first_indexed | 2024-03-12T15:48:16Z |
| format | Article |
| id | doaj.art-c73b470e030c4542a23567a4976f7df2 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:48:16Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-c73b470e030c4542a23567a4976f7df22023-08-09T15:20:09ZengIOP PublishingEnvironmental Research Letters1748-93262022-01-01171212403810.1088/1748-9326/aca4ebDivergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of Tibetan Plateau during 1960–2019Lei Song0https://orcid.org/0000-0002-7176-5882Lei Wang1Jing Zhou2Dongliang Luo3Xiuping Li4State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing 100101, People’s Republic of China; University of Chinese Academy of Sciences , Beijing, People’s Republic of China; PIESAT Information Technology Co., Ltd , Beijing, People’s Republic of ChinaState Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing 100101, People’s Republic of China; University of Chinese Academy of Sciences , Beijing, People’s Republic of ChinaState Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing 100101, People’s Republic of ChinaState Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences , Lanzhou, People’s Republic of ChinaState Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing 100101, People’s Republic of ChinaSince the 20th century, due to global warming, permafrost areas have undergone significant changes. The degradation of permafrost has complicated water cycle processes. Taking the upper Yellow River basin (UYRB) as a demonstration, this study discusses the long-term (1960–2019) changes in frozen ground and their hydrological effects with a cryosphere-hydrology model, in particular a permafrost version of the water and energy budget-based distributed hydrological model. The permafrost at the UYRB, with thickening active layer and lengthening thawing duration, has degraded by 10.8%. The seasonally frozen ground has a more pronounced intra-annual regulation that replenishes surface runoff in the warm season, while the degradation of permafrost leads to a runoff increase. The occurrence of extreme events at the UYRB has gradually decreased with the degradation of frozen ground, but spring droughts and autumn floods become more serious. The results may help better understand the hydrological impacts of permafrost degradation in the Tibetan Plateau.https://doi.org/10.1088/1748-9326/aca4ebcryosphere-hydrology modelfrozen groundrunoffsoil temperature and moistureupper Yellow River basinTibetan Plateau |
| spellingShingle | Lei Song Lei Wang Jing Zhou Dongliang Luo Xiuping Li Divergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of Tibetan Plateau during 1960–2019 Environmental Research Letters cryosphere-hydrology model frozen ground runoff soil temperature and moisture upper Yellow River basin Tibetan Plateau |
| title | Divergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of Tibetan Plateau during 1960–2019 |
| title_full | Divergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of Tibetan Plateau during 1960–2019 |
| title_fullStr | Divergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of Tibetan Plateau during 1960–2019 |
| title_full_unstemmed | Divergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of Tibetan Plateau during 1960–2019 |
| title_short | Divergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of Tibetan Plateau during 1960–2019 |
| title_sort | divergent runoff impacts of permafrost and seasonally frozen ground at a large river basin of tibetan plateau during 1960 2019 |
| topic | cryosphere-hydrology model frozen ground runoff soil temperature and moisture upper Yellow River basin Tibetan Plateau |
| url | https://doi.org/10.1088/1748-9326/aca4eb |
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