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Tytuł:
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Spatial and temporal change patterns of near-surface CO 2 and CH 4 concentrations in different permafrost regions on the Mongolian Plateau from 2010 to 2017.
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Autorzy:
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Adiya S; Institute of Geography and Geoecology, Mongolian Academy of Sciences, Ulaanbaatar 15170, Mongolia. Electronic address: .
Dalantai S; Institute of Geography and Geoecology, Mongolian Academy of Sciences, Ulaanbaatar 15170, Mongolia; Division of Natural Sciences, National University of Mongolia, Ulaanbaatar, 210646 Ulaanbaatar, Mongolia.
Wu T; Cryosphere Research Station on the Qinghai-Tibet Plateau, State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
Wu X; Cryosphere Research Station on the Qinghai-Tibet Plateau, State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
Yamkhin J; Institute of Geography and Geoecology, Mongolian Academy of Sciences, Ulaanbaatar 15170, Mongolia.
Bao Y; Inner Mongolia Key Laboratory of Remote Sensing and Geographic Information Systems, Inner Mongolia Normal University, Hohhot 010022, China.
Sumiya E; Division of Natural Sciences, National University of Mongolia, Ulaanbaatar, 210646 Ulaanbaatar, Mongolia.
Yadamsuren G; Ministry of Food, Agriculture, and Light Industry, Ulaanbaatar 13381, Mongolia.
Avirmed D; Institute of Geography and Geoecology, Mongolian Academy of Sciences, Ulaanbaatar 15170, Mongolia.
Dorjgotov B; Institute of Geography and Geoecology, Mongolian Academy of Sciences, Ulaanbaatar 15170, Mongolia.
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Źródło:
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The Science of the total environment [Sci Total Environ] 2021 Dec 15; Vol. 800, pp. 149433. Date of Electronic Publication: 2021 Aug 02.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Amsterdam, Elsevier.
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MeSH Terms:
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Greenhouse Gases*
Permafrost*
Carbon Dioxide/analysis ; Climate Change ; Methane/analysis
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Contributed Indexing:
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Keywords: Active layer thickness; GOSAT; Ground temperature; Mongolian Plateau; Near-surface CO(2) and CH(4) concentrations; Permafrost
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Substance Nomenclature:
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0 (Greenhouse Gases)
142M471B3J (Carbon Dioxide)
OP0UW79H66 (Methane)
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Entry Date(s):
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Date Created: 20210815 Date Completed: 20211022 Latest Revision: 20211022
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Update Code:
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20240105
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DOI:
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10.1016/j.scitotenv.2021.149433
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PMID:
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34392227
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Greenhouse gases (GHGs) released from permafrost regions may have a positive feedback to climate change, but there is much uncertainty about additional warming from the permafrost carbon cycle. One of the main reasons for this uncertainty is that the observation data of large-scale GHG concentrations are sparse, especially for areas with rapid permafrost degradation. We selected the Mongolian Plateau as the study area. We first analyzed the active layer thickness and ground temperature changes using borehole observations. Based on ground observation data, we assessed the applicability of Greenhouse Gases Observing Satellite (GOSAT) carbon dioxide (CO 2 ) and methane (CH 4 ) datasets. Finally, we analyzed the temporal and spatial changes in near-surface CO 2 and CH 4 concentrations from 2010 to 2017 and their patterns in different permafrost regions. The results showed that the Mongolian permafrost has been experiencing rapid degradation. The annual average near-surface CO 2 concentration increased gradually between 2.19 ppmv/yr and 2.38 ppmv/yr, whereas the near-surface CH 4 concentration increased significantly from 7.76 ppbv/yr to 8.49 ppbv/yr. There were significant seasonal variations in near-surface CO 2 and CH 4 concentrations for continuous, discontinuous, sporadic, and isolated permafrost zones. The continuous and discontinuous permafrost zones had lower near-surface CO 2 and CH 4 concentrations in summer and autumn, whereas sporadic and isolated permafrost zones had higher near-surface CO 2 and CH 4 concentrations in winter and spring. Our results indicated that climate warming led to rapid permafrost degradation, and carbon-based GHG concentrations also increased rapidly in Mongolia. Although, GHG concentrations increased at rates similar to the global average and many factors can account for their changes, GHG concentration in the permafrost regions merits more attention in the future because the spatiotemporal distribution has indicated a different driving force for regional warming.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
