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| Titel |
Role of local circulation in the evolution of severe PM10 episode in Krakow area in winter 2010 |
| VerfasserIn |
P. Durka, J. W. Kaminski, J. Struzewska |
| 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 |
250065457
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| Zusammenfassung |
| Air quality in the cities in southern Poland is often below the standards defined by the CAFÉ
Directive. Most of the poor air quality episodes are due to extremely high PM10
concentrations. Episodes of poor air quality where PM10 concentrations exceeded alert
threshold level (200 μg/m3 in respect to daily average) took place over 20 days during the
winter of 2010/2011 in Krakow. Hourly concentrations exceeded 800 μg/m3 and highest
observed concentration was 980 μg/m3.
High PM10 concentrations in Krakow are usually associated with temperature decrease,
which indicates more intensive emission from the coal based domestic heating. Also,
transport of polluted air masses from the industrial region of Silesia acts as an additional
source of PM10.
A high resolution GEM/LAM-AQ simulation was undertaken to evaluate severe PM10
episode over Krakow on 15-18 of December 2010. Two-step self-nesting procedure was
applied. GEM-AQ simulation on a global scale with the variable grid over Europe provided
boundary conditions for a regional run at 5 km resolution. Results from the regional
simulation were used to drive a 1 km resolution simulation on a target grid centered over
Krakow.
The 1 km resolution simulation showed interesting local recirculation pattern that might
explain the observed evolution of PM10 episodes. Also, we will present a comparison of the
GEM/LAM-AQ model results with the available meteorological and air quality
measurements.. |
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