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| Titel |
Regional air quality simulations to evaluate three anthropogenic emission inventories over the Eastern Mediterranean |
| VerfasserIn |
L. Pozzoli, A. Unal, T. Kindap, U. Im |
| 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 |
250068230
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| Zusammenfassung |
| A good estimate of gas and aerosol anthropogenic emissions is crucial for estimating gases
and aerosol concentrations in the atmosphere. Although high-resolution emission inventories
covering the entire Europe exist and they have been applied in several studies, their quality
has not been evaluated uniformly in all the European regions. Most of these existing studies
analyzed mainly the North-Western European countries supported also by a large variety of
observations. On the other hand, there are not many studies focusing on Eastern
Mediterranean.
In this study we present the results from a set of simulations that aims to quantify the
effect of three different anthropogenic emission inventories (EMEP, 0.5Ë x0.5Ë degrees;
EMEP/INERIS 0.1Ë x0.1Ë degrees; TNO/MACC_2005 1/8Ë x1/16Ë degrees) on gas and
aerosol concentrations over the Eastern Mediterranean region (Turkey and the Balkan
Peninsula). These inventories are characterized by similar total emissions, but with different
resolutions and geographical distributions. We present the results from regional model
simulations (WRF-CMAQ) and we analyze the impact of different grid resolutions (30x30
km and 10x10 km) and emission distributions on model performances. We performed two
sets of simulations, one representing winter conditions (1 month simulation for
January 2009), and one representing summer conditions (1 month simulation for July
2009).
We used the OMI satellite observations of NO2 total column concentrations to evaluate
the geographical pattern of simulated NO2 concentrations. The largest observed
pollution hot spot is located over Istanbul, with monthly mean averages larger than
12x1015 molecules cm-2 in January and 6x1015 molecules cm-2 in July. Other
polluted spots are located over the main cities of the region (e.g. Ankara, Athens,
Belgrade and Bucharest). None of the three emission inventories for both model
resolutions were able to represent the observed NO2 total column concentrations. In
particular the concentrations over Istanbul are largely underestimated. The model
simulations could generally capture the peaks over other cities in the region (e.g.
Athens, Belgrade, Bucharest) with significant differences between the emission
inventories.
The simulated O3 and PM2.5 monthly mean surface concentrations at 30x30
km resolution are similar among the simulations with EMEP and EMEP/INERIS
anthropogenic emissions. The simulation with TNO/MACC_2005 inventory, as compared to
EMEP, showed large differences, up to 10 ppbv for O3 and 5 μg m-3 for PM2.5,
particularly over Turkey. The advantage of using the EMEP/INERIS inventory
compared to the standard EMEP inventory is only visible at the finer model resolution
(10x10 km) as the spatial distribution of anthropogenic emissions is better linked to
the nature of the emissions (especially for the urban areas). The simulation with
TNO/MACC_2005 inventory at 10x10 km resolution shows a large number of point sources
over Turkey and in the Balkan Peninsula, which are not shown by EMEP/INERIS,
with differences up to 8 μg m-3 in PM2.5 monthly mean surface concentrations. |
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