Elevated PM10 And PM2.5 Concentrations
In Europe: A Model Experiment With
MM5-CMAQ And WRF-CHEM
Author(s)
R. San José, J. L. Pérez, J. L. Morant & R. M. González
Abstract
We have applied the MM5-CMAQ model to simulate the high concentrations in
PM10 and PM2.5 during a winter episode (2003) in Central Europe. The selected
period is January 15 – April 6 2003. Values of daily mean concentrations up to
75 µgm-3 are found on average of several monitoring stations in Northern
Germany. This model evaluation shows that there is an increasing
underestimation of primary and secondary species with increasing observed
PM10. The high PM levels were observed under stagnant weather conditions that
are difficult to simulate. The MM5 is the PSU/NCAR non-hydrostatic
meteorological model and CMAQ is the chemical dispersion model developed
by EPA (US) used in this simulation with CBM-V. The TNO emission inventory
was used to simulate the PM10 and PM2.5 concentrations with the MM5-CMAQ
model. The results show a substantial underestimation of the elevated values in
February and March 2003. An increase on the PM2.5 emissions (five times)
produces the expected results and the correlation coefficient increases slightly.
The WRF/CHEM model results show an excellent performance with correct
emission database. The main difference between MM5-CMAQ simulations and
WRF/CHEM is the MOSAIC particle models and the \“classical”
MADE/SORGAM particle model used in WRF/CHEM and CMAQ respectively.
MOSAIC seems to make a better job than MADE particle model for this
particular episode.
Keywords: emissions, PM10 and PM2.5, air quality models, air particles.
Keywords
emissions, PM10 and PM2.5, air quality models, air particles.
Related Book
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