approach Air Quality Monitoring: an integrated

(1)

A.R.P.A.

Agenzia Regionale per la Protezione dell’Ambiente

Brewer meeting, 21-26 september 2009 - Aosta

Air Quality Monitoring: an integrated

approach

(2)

Air Quality Monitoring: an integrated approach

• The measurements of the Air Quality Monitoring Network;

• The knowledge of the pollutants sources;

• A numerical modelling system;

Agenzia Regionale per la Protezione dell’Ambiente – Sezione Aria

(3)

Air Quality Monitoring Network

10 monitoring stations for the pollutants

(4)

Air Quality Monitoring: tropospheric ozone

• The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx) and volatile organic

compounds (VOCs), react in the atmosphere in the presence of sunlight

• Daily cycles and seasonal cycles;

• 5 sites : rural (2), urban, suburban and in altitude;

(5)

Air Quality Monitoring: tropospheric ozone

(6)

Dispersion pollutants modelling

FARM (Flexible Air quality Regional Model): a three- dimensional Eulerian model that accounts for the transport, chemical conversion and deposition of atmospheric pollutants.

Inputs for the model:

• Orography;

• Meteorology (data and interpolation);

• Emissions sources;

• Photochemical reactions set

(7)

Dispersion pollutants modelling :0

³

January mean

Yearly mean

July mean

(8)

Dispersion pollutants modelling

Summer day – hourly O³ concentrations

(9)

Dispersion pollutants modelling

Good agreement with the measured values

-2 -1.5 -1 -0.5 0 0.5 1 1.5 2

Mt. Fleury Plouves Dora Teatro Morgex Donnas La Thuile Etroubles GEIE Plouves Teatro Morgex Donnas Mt. Fleury Plouves Donnas La Thuile Etroubles Cogne Plouves Dora GEIE Plouves

NO2 SO2 O3 PM10 PM2.5

FB