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POMI simulations for 2005 and 2012

EMEP model results

Agnes Nyri

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Modelling over the Po-Valley domain

EMEP model setup

Domain:Po-Valley, 66 km2 UTM WGS84 grid

Meteorology:1 hourly MM5 interpolated on the66 km2 UTM WGS84 grid

Emissions:Aggregated to 66 km2 UTM WGS84 grid

BC:Interpolated from 3030 km2 UTM (as delivered)

Output deliveries

No final interpolation was necessary

Some aerosol components missing

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MM5 meteorology in the EMEP model

Interpolation to 66 km2 UTM grid

Interpolation of vertical levels to EMEP levels

Missing meteorological variables calculated either inthe model or during interpolation

vertical wind velocity in coordinates

3D cloud cover 3D precipitation

Surface stress ()

Potential temperature Unit conversions

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Annual emission totals in 2005 and 2012

Po-Valley domain

Year SO2 NOx VOC NH3 CO PM2.5 PMco

2005 181 798 945 318 1898 85 37

2012 128 670 820 312 1519 77 35

Units: Gg/year

In the model

Same temporal distribution of emissions

Same meteorology

Differences in results due to magnitudes (andspatial distribution) of emissions

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Yearly averaged O3 levels 2005

POMI Modellers Meeting, 24 September 2009, Ispra p.5/22

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Yearly averaged O3 levels 2012

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Difference in O3 levels between 2005 and 2012

POMI Modellers Meeting, 24 September 2009, Ispra p.7/22

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Yearly averaged PM2.5 levels 2005

POMI Modellers Meeting, 24 September 2009, Ispra p.8/22

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Yearly averaged PPM2.5 levels 2005

POMI Modellers Meeting, 24 September 2009, Ispra p.9/22

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Yearly averaged fine NO3 levels 2005

POMI Modellers Meeting, 24 September 2009, Ispra p.10/22

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Yearly averaged NH4 levels 2005

POMI Modellers Meeting, 24 September 2009, Ispra p.11/22

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Yearly averaged SO4 levels 2005

POMI Modellers Meeting, 24 September 2009, Ispra p.12/22

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Yearly averaged PM2.5 levels 2012

POMI Modellers Meeting, 24 September 2009, Ispra p.13/22

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Difference in PM2.5 levels between 2005 and 2012

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Yearly averaged PM10levels 2005

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Yearly averaged PM10levels 2012

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Difference in PM10levels between 2005 and 2012

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Yearly averaged NO2 levels 2005

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Yearly averaged NO2 levels 2012

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Difference in NO2 levels between 2005 and 2012

POMI Modellers Meeting, 24 September 2009, Ispra p.20/22

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Validation for the EMEP site Ispra

Comparison of measured and modelled data for Ispra

NO2 O3 PM2.5 PM10

Obs 18.47 43.41 29.79 37.89 (29.00)

Mod 19.27 40.90 12.25 14.30

Units: g/m3

Generally

Model results are better than previous base case

Still some peaks in ozone field

PM is significantly underestimated

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Model results

Improvements compared to previous base case

New emissions and meteorology

New method to calculate

EMEP model version changed

How to improve the results further?

Better interpolation of meteorology

Check with other meteorology

New fine scale landuse

POMI Modellers Meeting, 24 September 2009, Ispra p.22/22