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Spatiotemporal Distribution Characteristics of Fire Scars Further Prove the Correlation between Permafrost Swamp Wildfires and Methane Geological Emissions

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  • Wei Shan

    (Institute of Cold Regions Science and Engineering, Northeast Forestry University, Harbin 150040, China
    Ministry of Education Observation and Research Station of Permafrost Geo-Environment System in Northeast China (MEORS-PGSNEC), Harbin 150040, China
    Collaborative Innovation Centre for Permafrost Environment and Road Construction and Maintenance in Northeast China (CIC-PERCM), Harbin 150040, China)

  • Lisha Qiu

    (Institute of Cold Regions Science and Engineering, Northeast Forestry University, Harbin 150040, China)

  • Ying Guo

    (Institute of Cold Regions Science and Engineering, Northeast Forestry University, Harbin 150040, China
    Ministry of Education Observation and Research Station of Permafrost Geo-Environment System in Northeast China (MEORS-PGSNEC), Harbin 150040, China
    Collaborative Innovation Centre for Permafrost Environment and Road Construction and Maintenance in Northeast China (CIC-PERCM), Harbin 150040, China)

  • Chengcheng Zhang

    (Institute of Cold Regions Science and Engineering, Northeast Forestry University, Harbin 150040, China
    Ministry of Education Observation and Research Station of Permafrost Geo-Environment System in Northeast China (MEORS-PGSNEC), Harbin 150040, China
    Collaborative Innovation Centre for Permafrost Environment and Road Construction and Maintenance in Northeast China (CIC-PERCM), Harbin 150040, China)

  • Zhichao Xu

    (Institute of Cold Regions Science and Engineering, Northeast Forestry University, Harbin 150040, China)

  • Shuai Liu

    (Institute of Cold Regions Science and Engineering, Northeast Forestry University, Harbin 150040, China)

Abstract

Affected by global warming, methane gas released by permafrost degradation may increase the frequency of wildfires, and there are few studies on wildfires in permafrost regions and their correlation with climate and regional methane emissions. The northwestern section of the Xiaoxing’an Mountains in China was selected as the study area, and the spatial relationship between permafrost and spring wildfires was studied based on Landsat TM and Sentinel-2 data. Combined with monitoring data of air temperature, humidity, and methane concentration, the impact of methane emissions on spring wildfires was analyzed. The study shows that the spatial distribution of fire scars in spring is highly consistent with permafrost, and the change trend of fire scars is in line with the law of permafrost degradation. Wildfires occur intensively during the snow melting period in spring, and the temporal variation pattern is basically consistent with the methane concentration. The number of fire points was positively correlated with air temperature and methane concentration in March and April, and spring wildfires in permafrost regions are the result of a combination of rising seasonal temperatures, surface snow melting, and concentrated methane emissions. Larger areas of discontinuous permafrost are more prone to recurring wildfires.

Suggested Citation

  • Wei Shan & Lisha Qiu & Ying Guo & Chengcheng Zhang & Zhichao Xu & Shuai Liu, 2022. "Spatiotemporal Distribution Characteristics of Fire Scars Further Prove the Correlation between Permafrost Swamp Wildfires and Methane Geological Emissions," Sustainability, MDPI, vol. 14(22), pages 1-20, November.
  • Handle: RePEc:gam:jsusta:v:14:y:2022:i:22:p:14947-:d:970254
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    1. Chengcheng Zhang & Wei Shan & Shuai Liu & Ying Guo & Lisha Qiu, 2023. "Simulation of Spatiotemporal Distribution and Variation of 30 m Resolution Permafrost in Northeast China from 2003 to 2021," Sustainability, MDPI, vol. 15(19), pages 1-24, October.

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