[1]Tian Xin,Sa Chula,Meng Fanhao,et al.Analysis of spatiotemporal evolution characteristics of freeze-thaw state of surface soil in Inner Mongolia over the past 40 years[J].Research of Soil and Water Conservation,2025,32(01):148-159.[doi:10.13869/j.cnki.rswc.2025.01.010]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
32
Number of periods:
2025 01
Page number:
148-159
Column:
Public date:
2025-01-10
- Title:
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Analysis of spatiotemporal evolution characteristics of freeze-thaw state of surface soil in Inner Mongolia over the past 40 years
- Author(s):
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Tian Xin1,2, Sa Chula1,2, Meng Fanhao1,2, Luo Min1,2, Wang Mulan1,2, Zhang Xiang1,2, Zhang Haochen 3
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(1.College of Geographical Sciences,Inner Mongolia Normal University,Hohhot 010022,China; 2.Key Laboratory of Remote Sensing and Geographic Information Systems in Inner Mongolia Autonomous Region,Hohhot 010022,China; 3.Land Reserve Center of Inner Mongolia Autonomous Region,Hohhot 010041,China)
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- Keywords:
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near-surface soil freezing and thawing state; characteristics of spatiotemporal evolution; Inner Mongolia; climate change; human activities
- CLC:
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S152; P461+.4
- DOI:
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10.13869/j.cnki.rswc.2025.01.010
- Abstract:
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[Objectives]The aims of this study are to analyze the spatiotemporal differentiation and variation patterns of near-surface soil freeze-thaw state in Inner Mongolia, to quantify the influence of driving factors, so as to provide a theoretical basis for regional ecological environment protection and infrastructure construction. [Methods]Based on ERA5-LAND soil temperature data, the spatiotemporal evolution characteristics and driving factors of near-surface soil freeze-thaw states in Inner Mongolia over the past 40 years were analyzed by using Theil-Sen median, Mann-Kendall and multiple regression residual analysis methods. [Results](1)In recent 40 years, the onset dates of the autumn-winter freezing period and the complete freezing period in Inner Mongolia showed a delayed trend, with the change rates of 0.54 d/10 a and 0.45 d/10 a, respectively; with respect to the spatial distribution, they were gradually advanced with the increase of latitude and longitude. The onset dates of the winter-spring thawing period and the complete thaw period showed an advanced trend, with the change rates of 2.17 d/10 a and 2.15 d/10 a, respectively; with respect to the spatial distribution, they were gradually delayed with the increase of latitude and longitude.(2)The occurrence days of autumn-winter initial freezing period, complete freezing period and winter-spring thawing period showed a decreasing trend, with the change rates of 0.10 d/10 a, 2.61 d/10 a and 0.27 d/10 a, respectively, while the occurrence days of complete melting period increased at a rate of 2.68 d/10 a. In terms of spatial distribution, except for the complete freezing period, the trend of decreasing gradually from northeast to southwest, the other three phases showed a trend of gradual increase from northeast to southwest.(3)The area of different soil freeze-thaw states affected by climate change and human activities together accounted for the largest proportion, followed by climate change alone, and human activities alone accounted for the smallest. [Conclusion]The spatiotemporal differentiation and variation patterns of near-surface soil freeze-thaw state are obvious. The driving forces of different soil freeze-thaw states in different regions are different, which is of great significance for ecological environment protection and infrastructure construction in Inner Mongolia. In the future, more in-depth analysis should be conducted on the impacts of climate change and human activities on it.