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| Titel |
Air quality modelling : effects of emission reductions on concentrations of particulate matter |
| VerfasserIn |
L. Girault, Y. Roustan, C. Seigneur |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250069309
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| Zusammenfassung |
| Atmospheric particulate matter (PM) has adverse effects on human health. PM acts primarily
on respiratory and cardiovascular (due to their small size they can penetrate deep into the
lungs), but they are also known effects on the skin. In France, the “Particulate Plan” -
developed as part of the second National Environmental Health Plan - aims to reduce by 30%
fine PM (noted PM2.5because these particles have an aerodynamic diameter of 2.5
micrometers or less) by 2015.
A recent study by Airparif (the organization in charge of monitoring air quality in the
Paris region, the Île-de-France) and LSCE (Laboratory of climate and the environmental
science, France) has allowed, through a large measurement campaign conducted between
2009 and 2011, to quantify the proportion of PM produced in Île-de-France and those
transported from the surrounding areas. The study by numerical modelling of air
pollution presented here complements these results by investigating future emission
scenarios.
The CEREA develops and uses an air quality model which simulates the concentrations
of pollutants from an emission inventory, meteorological data and boundary conditions
of the area studied. After an evaluation of simulation results for the year 2005,
the model is used to assess the effects of various scenarios of reductions in NOx
and NH3 emissions on the concentrations of PM2.5in Île-de-France. The effects
of the controls on the local pollution and the long-range pollution are considered
separately.
For each emitted species, three scenarios of emission reductions are identified: an
emission reduction at the local level (Île-de-France), a reduction at the regional scale
(France) and a reduction at the continental scale (across Europe). In each case, a 15%
reduction is applied. The comparison of the results allows us to assess the respective
contributions of local emissions and long-range transport to PM2.5 concentrations. For
instance, the reduction of NOx emissions in Europe leads to a weak average decrease of
PM2.5 concentrations in Île-de-France, but a decrease of NOx emissions in Île-de-France
leads to an increase in PM2.5 concentrations due to a significant increase in oxidant
concentrations in that area. |
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