Articles | Volume 21, issue 18
Atmos. Chem. Phys., 21, 14275–14291, 2021
https://doi.org/10.5194/acp-21-14275-2021
Atmos. Chem. Phys., 21, 14275–14291, 2021
https://doi.org/10.5194/acp-21-14275-2021

ACP Letters 27 Sep 2021

ACP Letters | 27 Sep 2021

The driving factors of new particle formation and growth in the polluted boundary layer

Mao Xiao et al.

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Latest update: 01 Dec 2021
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Short summary
Experiments at CLOUD show that in polluted environments new particle formation (NPF) is largely driven by the formation of sulfuric acid–base clusters, stabilized by amines, high ammonia concentrations or lower temperatures. While oxidation products of aromatics can nucleate, they play a minor role in urban NPF. Our experiments span 4 orders of magnitude variation of observed NPF rates in ambient conditions. We provide a framework based on NPF and growth rates to interpret ambient observations.
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