Scholarlink

<p>New particle formation has been estimated to produce more than half of the global cloud condensation nuclei and profoundly impacts clouds, climate, and air quality. The initial growth from the cluster size ( ~ 1 nm) to a few nanometers, for which the underlying mechanisms can be very different from the subsequent growth, is the most critical stage for new particles to become climate-relevant. However, initial growth mechanisms evidenced by controlled laboratory experiments can rarely explain observations from the real atmosphere. Here we show that a large nanoparticle concentration gradient in the size space can drive unexpected rapid initial growth based on measurements across the globe. It accelerates the condensation of globally abundant oxygenated organic molecules onto a population of new particles compared to a single particle, and substantially increases the fraction of new particles that survive to climate- and air-quality-relevant sizes. Our findings provide insights into explaining the puzzle of the frequent new particle formation events in polluted urban environments and indicate an even more important role of new particle formation in climate predictions.</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 key role of nanoparticle concentration gradient in aerosol initial growth

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月2日

查看全文
  • Runlong Cai,
  • Xiaoxiao Li,
  • Yuyang Li,
  • Sara Blichner,
  • Dominik Stolzenburg,
  • Qiaozhi Zha,
  • Jing Cai,
  • Wei Nie,
  • Chao Yan,
  • Dan Dan Huang,
  • Zhe Wang,
  • Jin Wu,
  • Rujing Yin,
  • Nina Sarnela,
  • Wei Huang,
  • Santeri Tuovinen,
  • Sebastian Holm,
  • Lauri Ahonen,
  • Lei Yao,
  • Aijun Ding,
  • Federico Bianchi,
  • Yongchun Liu,
  • Paul M. Winkler,
  • Tuukka Petäjä,
  • Jianmin Chen,
  • Veli-Matti Kerminen,
  • Lin Wang,
  • Douglas Worsnop,
  • Jingkun Jiang,
  • Markku Kulmala,
  • Juha Kangasluoma

摘要

New particle formation has been estimated to produce more than half of the global cloud condensation nuclei and profoundly impacts clouds, climate, and air quality. The initial growth from the cluster size ( ~ 1 nm) to a few nanometers, for which the underlying mechanisms can be very different from the subsequent growth, is the most critical stage for new particles to become climate-relevant. However, initial growth mechanisms evidenced by controlled laboratory experiments can rarely explain observations from the real atmosphere. Here we show that a large nanoparticle concentration gradient in the size space can drive unexpected rapid initial growth based on measurements across the globe. It accelerates the condensation of globally abundant oxygenated organic molecules onto a population of new particles compared to a single particle, and substantially increases the fraction of new particles that survive to climate- and air-quality-relevant sizes. Our findings provide insights into explaining the puzzle of the frequent new particle formation events in polluted urban environments and indicate an even more important role of new particle formation in climate predictions.