Scholarlink

<p>Ultrafine particles (UFPs), defined as aerosols smaller than 100 nm, are numerically dominant in the atmosphere and play a crucial role in the production of cloud condensation nuclei (CCN). They arise from both new particle formation (NPF) and subsequent growth, as well as from primary emissions such as combustion sources. Despite contributing negligibly to particulate mass, they have disproportionate effects on cloud microphysics and radiative forcing, making them important yet highly uncertain components of the climate system. Current knowledge of how UFPs influence climate points to two primary mechanisms: direct radiative effects, primarily through absorption by black carbon (BC)-containing UFPs, and indirect effects, through their contribution to CCN and subsequent modification of cloud properties. However, substantial knowledge gaps remain. Observations are limited by the low sensitivity of current instrumentation and satellite retrievals, leading to systematic underestimation of UFP abundance and uncertainties in constraining their optical properties. Moreover, large discrepancies persist between observations and model simulations of NPF survival and CCN activation, compounded by the coarse resolution and simplified parameterizations of global models. This perspective emphasizes the need for coordinated multiplatform observations, mechanistic process studies, and the development of cross-scale modeling frameworks. Addressing these challenges will advance the quantitative understanding of UFP-cloud-climate interactions and provide more robust assessments of their role in anthropogenic climate forcing.</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

The climate effects of ultrafine particles: uncertainties and future perspectives

  • 期刊论文

  • 发表日期：

    2026年2月10日

查看全文
  • Yuzhi Jin,
  • Jiandong Wang,
  • Shang Wu,
  • Zhouyang Zhang,
  • Jiaping Wang,
  • Zeyuan Tian,
  • Bin Wang,
  • Qihao Lin,
  • Jing Cai,
  • Chenxi Li,
  • Lei Yao,
  • Chao Liu,
  • Jia Xing

摘要

Ultrafine particles (UFPs), defined as aerosols smaller than 100 nm, are numerically dominant in the atmosphere and play a crucial role in the production of cloud condensation nuclei (CCN). They arise from both new particle formation (NPF) and subsequent growth, as well as from primary emissions such as combustion sources. Despite contributing negligibly to particulate mass, they have disproportionate effects on cloud microphysics and radiative forcing, making them important yet highly uncertain components of the climate system. Current knowledge of how UFPs influence climate points to two primary mechanisms: direct radiative effects, primarily through absorption by black carbon (BC)-containing UFPs, and indirect effects, through their contribution to CCN and subsequent modification of cloud properties. However, substantial knowledge gaps remain. Observations are limited by the low sensitivity of current instrumentation and satellite retrievals, leading to systematic underestimation of UFP abundance and uncertainties in constraining their optical properties. Moreover, large discrepancies persist between observations and model simulations of NPF survival and CCN activation, compounded by the coarse resolution and simplified parameterizations of global models. This perspective emphasizes the need for coordinated multiplatform observations, mechanistic process studies, and the development of cross-scale modeling frameworks. Addressing these challenges will advance the quantitative understanding of UFP-cloud-climate interactions and provide more robust assessments of their role in anthropogenic climate forcing.