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<p>The forest loss impacts the land surface temperature (T<sub>s</sub>) through the biophysical effects. The impacts of deforestation on T<sub>s</sub> could be better understood through the investigation of the magnitude and sign of changes in T<sub>s</sub> varying with the fraction loss of different forest types in different seasons, which is expected to be beneficial to further model improvement. In this study, the biophysical effect on T<sub>s</sub> due to forest loss of different tree types and changes of T<sub>s</sub> with the forest loss were investigated based on the Coupled Model Intercomparison Project Phase 6 simulations from the BCC-CSM-MR, CESM2, CMCC-ESM2, and IPSL-CM6A-LR model. The results indicated that the deforestation at the global scale had a cooling effect (varied from -0.4&#xa0;K to -0.1&#xa0;K across models). The deforestation had a cooling effect in the boreal region for almost all the season and thus the whole year but controversial effect in the temperate and tropical region depending on the models, seasons, and forest types. The changes in T<sub>s</sub> were different across tree types in different seasons (especially in March–April-May and December-January–February in boreal and temperate regions) and different models (especially CESM2 and CMCC-ESM2 in tropical regions). The sign of T<sub>s</sub> changes in the boreal region was more geography-depended but more forest-type-depended and model-depended in the temperate and tropical region. The trend of the relationship between cooling effects and forest loss fraction generally presented an increased trend. The relationship between the warming effect due to deforestation and forest loss fraction primarily depended on tree types (increased trend for temperate and tropical broadleaf evergreen tree vs. decreased trend for tropical broadleaf deciduous tree).</p>

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The biophysical effect of loss of different forests on land surface temperature in idealized deforestation experiment

  • 期刊论文

  • 发表日期：

    2025年3月13日

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  • Yanwu Zhang,
  • Guo Zhang,
  • Weiping Li,
  • Xueli Shi,
  • Jianduo Li,
  • Qianqian Zou

摘要

The forest loss impacts the land surface temperature (Ts) through the biophysical effects. The impacts of deforestation on Ts could be better understood through the investigation of the magnitude and sign of changes in Ts varying with the fraction loss of different forest types in different seasons, which is expected to be beneficial to further model improvement. In this study, the biophysical effect on Ts due to forest loss of different tree types and changes of Ts with the forest loss were investigated based on the Coupled Model Intercomparison Project Phase 6 simulations from the BCC-CSM-MR, CESM2, CMCC-ESM2, and IPSL-CM6A-LR model. The results indicated that the deforestation at the global scale had a cooling effect (varied from -0.4 K to -0.1 K across models). The deforestation had a cooling effect in the boreal region for almost all the season and thus the whole year but controversial effect in the temperate and tropical region depending on the models, seasons, and forest types. The changes in Ts were different across tree types in different seasons (especially in March–April-May and December-January–February in boreal and temperate regions) and different models (especially CESM2 and CMCC-ESM2 in tropical regions). The sign of Ts changes in the boreal region was more geography-depended but more forest-type-depended and model-depended in the temperate and tropical region. The trend of the relationship between cooling effects and forest loss fraction generally presented an increased trend. The relationship between the warming effect due to deforestation and forest loss fraction primarily depended on tree types (increased trend for temperate and tropical broadleaf evergreen tree vs. decreased trend for tropical broadleaf deciduous tree).