Scholarlink

<p>Microplastic and nanoplastic particles (MNPs) are pervasive in the atmosphere, yet their direct radiative forcing (DRF) remains poorly constrained. Using a radiative transfer model combined with experimentally derived optical properties and simulated atmospheric distributions, we show that coloured MNPs exhibit strong light absorption, with a mean refractive index of 1.49–0.22<i>i</i> at 550 nm and absorption coefficients 74.8 times higher than those of pristine particles. Atmospheric ageing produces minimal net optical change, as yellowing-induced absorption in white particles is largely offset by bleaching of red ones. Modelled global surface concentrations reach 4.18 MP m<sup>−</sup><sup>3</sup> for microplastics and 3.67 ng m<sup>−</sup><sup>3</sup> for nanoplastics. Resulting simulations yield mean DRF of 0.039 ± 0.019 W m<sup>−</sup><sup>2</sup> for MNPs, equivalent to 16.2% of black carbon forcing. Regional DRF peaks over the North Pacific Subtropical Gyre (~1.34 W m<sup>−</sup><sup>2</sup>), exceeded located black carbon by 4.7-fold, highlighting MNPs as previously unrecognized climate forcing agents.</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

Atmospheric warming contributions from airborne microplastics and nanoplastics

  • 期刊论文

  • 发表日期：

    2026年5月4日

查看全文
  • Yu Liu,
  • Hongbo Fu,
  • Hongliang Zhang,
  • Yunhang Wang,
  • Rajan K. Chakrabarty,
  • Xiang Tu,
  • Xu Tang,
  • Alexander Laskin,
  • Gregory R. Carmichael,
  • Jianmin Chen,
  • Joseph S. Francisco,
  • Drew T. Shindell

摘要

Microplastic and nanoplastic particles (MNPs) are pervasive in the atmosphere, yet their direct radiative forcing (DRF) remains poorly constrained. Using a radiative transfer model combined with experimentally derived optical properties and simulated atmospheric distributions, we show that coloured MNPs exhibit strong light absorption, with a mean refractive index of 1.49–0.22i at 550 nm and absorption coefficients 74.8 times higher than those of pristine particles. Atmospheric ageing produces minimal net optical change, as yellowing-induced absorption in white particles is largely offset by bleaching of red ones. Modelled global surface concentrations reach 4.18 MP m−3 for microplastics and 3.67 ng m−3 for nanoplastics. Resulting simulations yield mean DRF of 0.039 ± 0.019 W m−2 for MNPs, equivalent to 16.2% of black carbon forcing. Regional DRF peaks over the North Pacific Subtropical Gyre (~1.34 W m−2), exceeded located black carbon by 4.7-fold, highlighting MNPs as previously unrecognized climate forcing agents.