TY  - JOUR
AU  - Song, Huan
AU  - Chen, Xiaorui
AU  - Lu, Keding
AU  - Zou, Qi
AU  - Tan, Zhaofeng
AU  - Fuchs, Hendrik
AU  - Wiedensohler, Alfred
AU  - Moon, Daniel R.
AU  - Heard, Dwayne E.
AU  - Baeza-Romero, María-Teresa
AU  - Zheng, Mei
AU  - Wahner, Andreas
AU  - Kiendler-Scharr, Astrid
AU  - Zhang, Yuanhang
TI  - Influence of aerosol copper on HO<sub>2</sub> uptake: a novel parameterized equation
JO  - Atmospheric chemistry and physics
VL  - 20
IS  - 24
SN  - 1680-7324
CY  - Katlenburg-Lindau
PB  - EGU
M1  - FZJ-2021-01304
SP  - 15835 - 15850
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000615601600001
DO  - DOI:10.5194/acp-20-15835-2020
UR  - https://juser.fz-juelich.de/record/890997
ER  -