Size-dependent influence of NOx on the growth rates of organic aerosol particles. Journal Article uri icon

Overview

abstract

  • Atmospheric new-particle formation (NPF) affects climate by contributing to a large fraction of the cloud condensation nuclei (CCN). Highly oxygenated organic molecules (HOMs) drive the early particle growth and therefore substantially influence the survival of newly formed particles to CCN. Nitrogen oxide (NOx) is known to suppress the NPF driven by HOMs, but the underlying mechanism remains largely unclear. Here, we examine the response of particle growth to the changes of HOM formation caused by NOx We show that NOx suppresses particle growth in general, but the suppression is rather nonuniform and size dependent, which can be quantitatively explained by the shifted HOM volatility after adding NOx By illustrating how NOx affects the early growth of new particles, a critical step of CCN formation, our results help provide a refined assessment of the potential climatic effects caused by the diverse changes of NOx level in forest regions around the globe.

publication date

  • May 1, 2020

Date in CU Experts

  • September 23, 2020 2:55 AM

Full Author List

  • Yan C; Nie W; Vogel AL; Dada L; Lehtipalo K; Stolzenburg D; Wagner R; Rissanen MP; Xiao M; Ahonen L

author count

  • 84

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 2375-2548

Additional Document Info

volume

  • 6

issue

  • 22