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

We have performed a series of simulations with an aerosol dynamics box model tostudy the connection between new particle formation and sulphuric acidconcentration. For nucleation either activation mechanism with a lineardependence on the sulphuric acid concentration, kinetic mechanism with a squareddependence on the sulphuric acid concentration or ternaryH2O-H2SO4-NH3 nucleation was assumed. The aim was to studythe factors that affect the sulphuric acid dependence during the earlystages of particle growth, and specifically to find conditions which would yieldthe linear dependence between the particle number concentration at 3–6 nmand sulphuric acid, as observed in field experiments. The simulations showedthat the correlation with sulphuric acid may change during the growth fromnucleation size to 3–6 nm size range, the main reason being the sizedependent growth rate between 1 and 3 nm. In addition, the assumed size forthe nucleated clusters had a crucial impact on the sulphuric acid dependenceat 3 nm. A linear dependence between the particlenumber concentration at 3 nm and sulphuric acid was achieved, when activationnucleation mechanism was used with a low saturation vapour pressure for thecondensable organic vapour, or with nucleation taking place at ~2 nminstead of ~1 nm. Simulations with activation, kinetic and ternary nucleation showed that ternarynucleation reproduces too steep dependence on sulphuric acid as compared tothe linear or square dependence observed in field measurements

Aerosol dynamics simulations on the connection of sulphuric acid and new particle formation