 |
| Titel |
Impact of vegetation fires on tropospheric chemical composition in the Guinean Gulf and on megacities air quality. |
| VerfasserIn |
Laurent Menut, Cyrille Flamant, Solene Turquety, Adrien Deroubaix, Remi Meynadier |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250153996
|
| Publikation (Nr.) |
 EGU/EGU2017-19038.pdf |
|
|
|
|
|
| Zusammenfassung |
| In the framework of the preparation of the "Dynamics-Aerosol-Chemistry-Cloud Interactions
in West Africa" (DACCIWA) project, the tropospheric chemical composition in the
megacities along the Guinean Gulf is studied using the WRF and CHIMERE regional
models. Two simulations are performed for the May-July 2014 period, without and with
biomass burning emissions. The impact of biomass burning from Central Africa is quantified
for aerosol optical depth, gaseous species (ozone and carbon monoxide) and particulate
matter with a mean mass median of diameter less than 10 μm (PM10, both concentrations and
chemical composition). We show that vegetation fires in Central Africa represent an
important contribution to air pollution in urbanized areas located in the Guinean Gulf. On
average in July 2014, CO and O3 concentrations are increased in Abidjan (Ivory
Coast) by 38.5% and 15.4% respectively. In Abidjan and Lagos (Nigeria), two of
the biggest megacities in southern West Africa, a net increase of PM10 by 36.5%
and 53.5% is quantified. The analysis of the chemical composition of PM10 shows
that this increase is mainly related to an increase of Particulate Primary Matter
and Particulate Organic Matter in the fine mode of the aerosol size distribution. |
|
|
|
|
|
|