Scholarlink

<p>Black carbon is a global climate forcer due to its strong radiative absorption, which is highly sensitive to coating formation regulated by anthropogenic and biogenic emissions. However, how cross-regional biogenic sources modulate urban black carbon coating and radiative effects remains poorly understood. Here we integrate observations and model simulations to investigate such biogenic–anthropogenic interactions in eastern China. The results show that biogenic volatile organic compounds from vegetation-rich regions undergo atmospheric oxidation to produce oxygenated organic compounds, which are subsequently advected into downwind urban areas. These products enhance regional atmospheric oxidation capacity and supply additional precursors, thereby promoting secondary organic aerosol production. This biogenic-induced strengthening of regional photochemistry drives the formation of highly oxidized secondary organic aerosol coatings on black carbon and increases its fraction within the total particle population. Consequently, black carbon absorption efficiency increases more steeply with the coating carbon oxidation state under biogenic-rich conditions, yielding an average ~20% enhancement in radiative absorption from the lensing effect relative to biogenic-poor periods. Our findings reveal that cross-regional biogenic–anthropogenic interactions enhance both the formation and particle population fraction of secondary organic aerosol coatings on urban black carbon, potentially further amplifying its radiative effects as biogenic emissions increase under future warming scenarios.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Urban black-carbon radiative heating intensified by biogenic–anthropogenic interactions

  • 期刊论文

  • 发表日期：

    2026年2月13日

查看全文
  • Yunjiang Zhang,
  • Shijie Cui,
  • Jingyi Li,
  • Ming Wang,
  • Xiaofeng Xu,
  • Jiandong Wang,
  • Jie Fang,
  • Hanrui Lang,
  • Bo Zheng,
  • Sheng Zhong,
  • Peng Sun,
  • Haiwei Li,
  • Yun Wu,
  • Jianlin Hu,
  • Junfeng Wang,
  • Mindong Chen,
  • Olivier Favez,
  • Didier Hauglustaine,
  • Philippe Ciais,
  • Kaspar R. Daellenbach,
  • André S. H. Prévôt,
  • Xinlei Ge

摘要

Black carbon is a global climate forcer due to its strong radiative absorption, which is highly sensitive to coating formation regulated by anthropogenic and biogenic emissions. However, how cross-regional biogenic sources modulate urban black carbon coating and radiative effects remains poorly understood. Here we integrate observations and model simulations to investigate such biogenic–anthropogenic interactions in eastern China. The results show that biogenic volatile organic compounds from vegetation-rich regions undergo atmospheric oxidation to produce oxygenated organic compounds, which are subsequently advected into downwind urban areas. These products enhance regional atmospheric oxidation capacity and supply additional precursors, thereby promoting secondary organic aerosol production. This biogenic-induced strengthening of regional photochemistry drives the formation of highly oxidized secondary organic aerosol coatings on black carbon and increases its fraction within the total particle population. Consequently, black carbon absorption efficiency increases more steeply with the coating carbon oxidation state under biogenic-rich conditions, yielding an average ~20% enhancement in radiative absorption from the lensing effect relative to biogenic-poor periods. Our findings reveal that cross-regional biogenic–anthropogenic interactions enhance both the formation and particle population fraction of secondary organic aerosol coatings on urban black carbon, potentially further amplifying its radiative effects as biogenic emissions increase under future warming scenarios.