 |
| Titel |
Modeling birch pollen emission and transport with the chemistry-transport model CHIMERE |
| VerfasserIn |
Aurelie Potier, Dmitry Khvorostyanov, Laurent Menut, Mikhail Sofiev, Nicolas Viovy, Robert Vautard, Michel Thibaudon, Phikune Tao |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250081809
|
|
|
|
|
|
| Zusammenfassung |
| Among pollen species, birch pollen is recognized to have one of the highest allergenic effects.
Its emission as well as its transport with air masses depend on several meteorological
parameters. If the conditions are favourable (typically sunny and windy days), the pollen can
travel at distances of hundred kilometers in only one day. For analysis and source-oriented
forecast, the chemistry-transport models are promising tools to simulate emissions and
concentrations over large domains such as Europe.
In addition to pollution gaseous and particulate species, the birch pollen related processes
were recently added in the chemistry-transport model CHIMERE. This first includes an
emission module based on a double-threshold temperature sum concept which describes the
onset of the flowering season as well as its propagation using a birch pollen source
emission. The parameterization is defined following Sofiev et al. (2012). Second, the
processes such as transport, turbulent vertical mixing, dry deposition, wash out and
resuspension were updated in CHIMERE to account for the specificities of the pollen
grains.
In this study, we present a simulation of pollen emissions and transport over Europe with
an horizontal resolution of 15km. The CHIMERE model is driven by the WRF
meteorological fields and the simulation covers the complete spring of 2008. The modeled
pollen concentrations are compared to the R.N.S.A. french national aerobiological survey
network measurements. The strength and weaknesses of the modeled results are discussed in
terms of emissions data available, meteorology and all specific processes added in the model. |
|
|
|
|
|
|