Articles | Volume 20, issue 4
Atmos. Chem. Phys., 20, 2591–2601, 2020
https://doi.org/10.5194/acp-20-2591-2020
Atmos. Chem. Phys., 20, 2591–2601, 2020
https://doi.org/10.5194/acp-20-2591-2020

Research article 03 Mar 2020

Research article | 03 Mar 2020

Wintertime new particle formation and its contribution to cloud condensation nuclei in the Northeastern United States

Fangqun Yu et al.

Data sets

Ammonia Monitoring Network (AMoN) data National Atmospheric Deposition Program (NRSP3) http://nadp.slh.wisc.edu/data/AMoN/

Model code and software

NCAR Command Language (Version 6.6.2) UCAR/NCAR/CISL/TDD https://doi.org/10.5065/D6WD3XH5

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Short summary
Particle number concentration (PNC) is a key parameter important for the health and climate impacts of atmospheric aerosols. We show that, even during wintertime, regional nucleation occurs and contributes significantly to number concentrations of ultrafine particles and cloud condensation nuclei. Due to low biogenic emissions, wintertime regional nucleation is solely controlled by inorganic species, and ternary ion-mediated nucleation is able to capture the observed variations in PNC.
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