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Biophysical Effects of Land Cover Changes on Land Surface Temperature on the Sichuan Basin and Surrounding Regions

Author

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  • Xiangming Mao

    (Law School, Panzhihua University, Panzhihua 617000, China)

  • Gula Tang

    (Guokechuang (Beijing) Information Technology Co., Ltd., Beijing 100070, China)

  • Jiaqiang Du

    (State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
    State Environmental Protection Key Laboratory of Regional Eco-Process and Function Assessment, Chinese Research Academy of Environmental Science, Beijing 100012, China)

  • Xiaotong Tian

    (Guokechuang (Beijing) Information Technology Co., Ltd., Beijing 100070, China)

Abstract

The biophysical effect of land cover changes (LCC) on local temperature is currently a hot topic. This work selects one of the nine agricultural divisions in China, the Sichuan Basin and surrounding regions, as the study area. By combining long-term series satellite remote sensing products with the space-and-time method, the spatial and temporal variations of the actual biophysical effects of LCC on land surface temperature (LST) are obtained. The results show that: (1) From 2001 to 2020, LCCs from Savannas to Cropland, from Cropland to Savannas, and from Savannas to Mixed Forest occurred frequently within the study area, and their area proportions of the total conversions are 21.7%, 18.5%, and 17.6%, respectively. (2) The biophysical feedback of LCC in the study area led to a LST increase of 0.01 ± 0.004 K at annual scale, which presents a seasonal pattern of “strong warming in summer and autumn yet weak cooling in winter”. It can exacerbate 14.3% or alleviate 8.3% of the background climate warming effect, illustrating the importance of biophysical effects on local climate change. The interaction between savannas and cropland or mixed forest and urbanizations formed the main driver for the above patterns. (3) Both the occurrence area of LCC and the warming effects at annual or seasonal scale show a trend of “first rising and then declining”, whereas the cooling effect in winter exhibits continuous enhancement over time. The monodirectional or mutual conversion between cropland and savannas is the dominant conversion responsible for these temporal patterns. The findings can provide realistic scientific guidance for informing rational policies on land management and targeted strategies for climate change response in the study area.

Suggested Citation

  • Xiangming Mao & Gula Tang & Jiaqiang Du & Xiaotong Tian, 2023. "Biophysical Effects of Land Cover Changes on Land Surface Temperature on the Sichuan Basin and Surrounding Regions," Land, MDPI, vol. 12(11), pages 1-14, October.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:11:p:1959-:d:1266323
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    References listed on IDEAS

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    1. Ruirui Dong & Michael Wurm & Hannes Taubenböck, 2022. "Seasonal and Diurnal Variation of Land Surface Temperature Distribution and Its Relation to Land Use/Land Cover Patterns," IJERPH, MDPI, vol. 19(19), pages 1-20, October.
    2. Xuhui Lee & Michael L. Goulden & David Y. Hollinger & Alan Barr & T. Andrew Black & Gil Bohrer & Rosvel Bracho & Bert Drake & Allen Goldstein & Lianhong Gu & Gabriel Katul & Thomas Kolb & Beverly E. L, 2011. "Observed increase in local cooling effect of deforestation at higher latitudes," Nature, Nature, vol. 479(7373), pages 384-387, November.
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