Air Emission Inventories

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Air Emission Inventories for the Greater Athens Area

An emission inventory is a source of information on the spatial distribution and total amounts of pollutants from major industrial sources, transport and other human activities within a certain geographical area. A priori knowledge of the significant sources of pollutants is essential to local air quality assessment and management and the use of emission inventories can be the indispensable tool to carry out such a task.

Of major concern are the serious air pollution problems in Attica. In order to assess the air-quality in the Greater Athens Area (GAA), air-emissions inventories of high spatial resolution for various pollutants (NOx, NMVOC, Benzene, CO, CO2, SO2 and PM) have been compiled with the aid of a Geographical Information System (GIS). The GAA has been defined as a geographical area to cover the whole Attica peninsula.

Emissions sources from significant anthropogenic activities such as road transport, industry, airport, harbour and domestic heating have been considered in the construction of the bottom-up inventories for the GAA. Since it is impracticable to get in situ measurements of every emission source in a large urban area, the majority of emissions can be estimated from local information such as fuel consumption, vehicle kilometers traveled, traffic load, industrial processes and other activities related to emissions. Data were collected from various sources mainly the National Statistical Service and the Greek Ministries of Environment and Development for three types of sources: (i) line sources including roads, (ii) area sources including low intensity emissions from sources such as building heating systems and (iii) point sources including emissions from large industrial plants. 

Calculated annual emissions inventories of NOx, NMVOC, Benzene, SO2, CO, CO2 and PM in the GAA are displayed here. 

The total area coverage of the inventories is 72 km by 72 km and the spatial resolution is 1 km by 1 km. The emissions inventories are also available with a temporal resolution of 1 hr. 

Calculations showed that traffic is responsible for almost all CO emissions, two-thirds of NOx emissions and half of the total NMVOC emissions in Attica. On the other hand, industry was found to be responsible for almost all SO2 and PM emissions and a third of NOx and NMVOC emissions while half of CO2 emissions have originated from central heating. 

 

Acknowledgements

This work has been carried out within the framework of the EC research project IMPRESAREO (ENV4 - CT98 - 0752,  DG 12 – ESCY).

 

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Last modified: Σεπτεμβρίου 15, 2006