 |
| Titel |
Semi-volatile inorganic species: importance for atmospheric chemical composition on diurnal and seasonal timescales |
| VerfasserIn |
Hana Pearce, Graham Mann, Stephen Arnold, Fiona O'Connor, Francois Benduhn, Steven Rumbold, Kirsty Pringle |
| Konferenz |
EGU General Assembly 2016
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250134572
|
| Publikation (Nr.) |
 EGU/EGU2016-15316.pdf |
|
|
|
|
|
| Zusammenfassung |
| Nitrate aerosol has become an important driver of reduced European air quality and climate
forcing, following reductions in sulphate precursor emissions since the 1980s, and is
expected to be more influential in future decades. Measurements from the European
Integrated Project on Aerosol and Cloud Climate Air Quality Interactions (EUCAARI)
field campaign have shown that semi-volatile aerosol species such as ammonium nitrate can
comprise a major component of the sub-micron particulate matter, particularly in high
pollution episodes. This presentation will assess the contribution of semi-volatile inorganic
aerosol to diurnal and seasonal cycles in atmospheric chemical composition over Europe. We
use the UM-UKCA composition-climate model, including the GLOMAP interactive aerosol
microphysics module and a recently developed ‘hybrid’ dissolution solver (HyDis) to
accurately represent size-resolved partitioning of ammonia and nitric acid to the particle
phase.
In particular, we evaluate simulated size-resolved composition variations over Europe
through the diurnal cycle, comparing hourly model output to Aerosol Mass Spectrometer
observations at several sites during 2008. We will present the results of this composition
analysis, in addition to model evaluation from comparisons with European Monitoring for
Environmental Protection (EMEP) network and EUCAARI field campaign observations. |
|
|
|
|
|
|