Journal Article

FZJ-2021-01304

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of aerosol copper on HO₂ uptake: a novel parameterized equation

Song, H. ; Chen, X. ; Lu, K. (Corresponding author) ; Zou, Q. ; Tan, Z.FZJ* ; Fuchs, H.FZJ* ; Wiedensohler, A. ; Moon, D. R. ; Heard, D. E. ; Baeza-Romero, M.-T. ; Zheng, M. ; Wahner, A.FZJ* ; Kiendler-Scharr, A.FZJ* ; Zhang, Y.

2020
EGU Katlenburg-Lindau

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Please use a persistent id in citations: http://hdl.handle.net/2128/27376  doi:10.5194/acp-20-15835-2020

Abstract: Heterogeneous uptake of hydroperoxyl radicals (HO2) onto aerosols has been proposed to be a significant sink of HOx, hence impacting the atmospheric oxidation capacity. Accurate calculation of the HO2 uptake coefficient γHO2 is key to quantifying the potential impact of this atmospheric process. Laboratory studies show that γHO2 can vary by orders of magnitude due to changes in aerosol properties, especially aerosol soluble copper (Cu) concentration and aerosol liquid water content (ALWC). In this study we present a state-of-the-art model called MARK to simulate both gas- and aerosol-phase chemistry for the uptake of HO2 onto Cu-doped aerosols. Moreover, a novel parameterization of HO2 uptake was developed that considers changes in relative humidity (RH) and condensed-phase Cu ion concentrations and which is based on a model optimization using previously published and new laboratory data included in this work. This new parameterization will be applicable to wet aerosols, and it will complement current IUPAC recommendations.

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Contributing Institute(s):

1. Troposphäre (IEK-8)

Research Program(s):

1. 243 - Tropospheric trace substances and their transformation processes (POF3-243) (POF3-243)

Appears in the scientific report 2020

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