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

A thermodynamical model for treatment of gas/aerosol partitioning of semivolatile inorganic aerosols has been implemented in a global chemistry andaerosol transport model (Oslo CTM2). The sulphur cycle and sea saltparticles have been implemented earlier in the Oslo CTM2 and the focus ofthis study is on nitrate partitioning to the aerosol phase and ifparticulate nitrate is expected to form in fine or coarse mode aerosols.Modelling of the formation of fine mode nitrate particles is complicatedsince it depends on other aerosol components and aerosol precursors as wellas meteorological condition. The surface concentrations from the model arecompared to observed surface concentrations at around 20 sites around Europefor nitrate and ammonium. The agreement for nitrate is good but the modelledvalues are somewhat underestimated compared to observations at highconcentrations, whereas for ammonium the agreement is very good. However, weunderscore that such a comparison is not of large importance for the aerosoloptical depth of particulate nitrate since the vertical profile of aerosolcomponents and their precursors are so important. Fine mode nitrateformation depends on vertical profiles of both ammonia/ammonium andsulphate. The model results show that fine mode particulate nitrate play anon-negligible role in the total aerosol composition in certainindustrialized regions and therefore have a significant local radiativeforcing. On a global scale the aerosol optical depth of fine mode nitrate isrelatively small due to limited availability of ammonia and loss to largersea salt particles. Inclusion of sea salt in the calculations reduces theaerosol optical depth and burden of fine mode nitrate by 25% on a globalscale but with large regional variations

Modelling of nitrate and ammonium-containing aerosols in presence of sea salt