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<p>Dust aerosols are pivotal in regulating the global energy balance and climate, with profound implications for radiative forcing. Land use and land cover change (LUCC) significantly influence dust emissions, altering the concentration and distribution of dust aerosols. However, the direct radiative forcing (DRF) of dust aerosols under LUCC scenarios remains poorly understood. Here, we quantified the impact of LUCC between 2000 and 2020 on spring DRF of dust aerosols in northern China using the Weather Research and Forecasting model coupled to Chemistry (WRF-Chem) model. Results revealed a general decline in dust concentrations due to LUCC, accompanied with distinct DRF variations across different vertical levels. At the surface, LUCC-induced dust changes exhibited a negative DRF (-3.66&#xa0;W m<sup>− 2</sup>), while a positive DRF (3.35&#xa0;W m<sup>− 2</sup>) in the atmosphere. The net effect at the top of the atmosphere was weakly negative. Transitions of bare land to water bodies and water bodies to grassland had the most pronounced DRF impacts, particularly in northernmost Xinjiang, the Gansu-Qinghai border, central Qinghai, and central Inner Mongolia. These findings enhance our understanding in LUCC-dust-climate interactions and provide insights for optimizing land use policy to support sustainable development in dust-prone regions.</p>

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Direct radiative forcing potential of spring dust aerosol changes driven by land use and land cover change in Northern China

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • Weiyang Yan,
  • Mengjie Zhu,
  • Hongquan Song,
  • Xueli Ni,
  • Wenjing Tian,
  • Xiaoqiong Liu,
  • Lele Gao,
  • Cancan Zhao

摘要

Dust aerosols are pivotal in regulating the global energy balance and climate, with profound implications for radiative forcing. Land use and land cover change (LUCC) significantly influence dust emissions, altering the concentration and distribution of dust aerosols. However, the direct radiative forcing (DRF) of dust aerosols under LUCC scenarios remains poorly understood. Here, we quantified the impact of LUCC between 2000 and 2020 on spring DRF of dust aerosols in northern China using the Weather Research and Forecasting model coupled to Chemistry (WRF-Chem) model. Results revealed a general decline in dust concentrations due to LUCC, accompanied with distinct DRF variations across different vertical levels. At the surface, LUCC-induced dust changes exhibited a negative DRF (-3.66 W m− 2), while a positive DRF (3.35 W m− 2) in the atmosphere. The net effect at the top of the atmosphere was weakly negative. Transitions of bare land to water bodies and water bodies to grassland had the most pronounced DRF impacts, particularly in northernmost Xinjiang, the Gansu-Qinghai border, central Qinghai, and central Inner Mongolia. These findings enhance our understanding in LUCC-dust-climate interactions and provide insights for optimizing land use policy to support sustainable development in dust-prone regions.