English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. Heterogeneous uptake of hydroperoxyl radicals (HO2)onto aerosols has been proposed to be a significant sink of HOx, henceimpacting the atmospheric oxidation capacity. Accurate calculation of theHO2 uptake coefficient γHO2 is key toquantifying the potential impact of this atmospheric process. Laboratorystudies show that γHO2 can vary by orders ofmagnitude due to changes in aerosol properties, especially aerosol solublecopper (Cu) concentration and aerosol liquid water content (ALWC). In thisstudy 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-dopedaerosols. Moreover, a novel parameterization of HO2 uptake wasdeveloped that considers changes in relative humidity (RH) and condensed-phaseCu ion concentrations and which is based on a model optimization usingpreviously published and new laboratory data included in thiswork. This new parameterization will be applicable to wet aerosols, and itwill complement current IUPAC recommendations. The new parameterization isas follows (the explanations for symbols are in the Appendix): 1γHO2=1αHO2+3×υHO24×106×RdHcorrRT×(5.87+3.2×ln⁡(ALWC/[PM]+0.067))×[PM]-0.2×Cu2+eff0.65+υHO2l4RTHorgDorgε. All parameters used in the paper are summarized in Table A1. Using this newequation, field data from a field campaign were used to evaluate the impactof the HO2 uptake onto aerosols on the ROx (= OH + HO2 + RO2) budget. Highly variable values for HO2 uptake wereobtained for the North China Plain (median value &lt; 0.1).

Influence of aerosol copper on HO&lt;sub&gt;2&lt;/sub&gt; uptake: a novel parameterized equation

Influence of aerosol copper on HO<sub>2</sub> uptake: a novel parameterized equation