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Integrating greenhouse gases emissions

Citeair II has developed an integrated emission inventory (EI) for local air and climate policies. It may seems obvious to combine air and climate emissions into a single system since they mainly originate from the same sources. Following the experience in the project, we can assure you that it is in fact a convenient thing to have. However, making the IEI is far from easy since the demands and methodologies for EIs are quite different in the climate and the air quality fields. Creating the integrated emission inventory, although not straightforward, did provide some interesting knowledge: for example, calculating NOx from CO2 gives different results than calculating CO2 from NOx. It is not possible to say which is correct, but by confronting the different ways of making the EI, it is possible to have an idea of which sources are under or overestimated.

Details of the EI and its development can be found in a guidebook written by the project. This document describes emission inventories in the various project cities, and addresses several conceptual issues in creating EIs, and in dealing with carbon sinks. Accompanying the guidebook is an example of an integrated EI, available in MS Access format: the example includes data from Rotterdam, but interested users can use the structure of the database and adapt it to their own needs.

Read the guidebook and learn from what others have tried before. Play with the database and save some time developing everything from scratch: this is the essence of Interreg projects! Not every city can benefit from the same way in our findings on an IEI. If you are working in a big city with many sources emitting air pollutants and CO2, and if you do your own dispersion modelling for different emission scenarios then the database can be useful for you. If your city does not do a lot a air quality modelling, our findings on confronting top-down and bottom-up emission inventories can be useful, and it would be interesting for you to check to see if you get the same results. If you are from a medium or small city and mainly interested in monitoring your energy and fuel consumption, then the IEI is not for you, but you may want to consider our findings on shadow emissions. 

View the guidebook here. 

Download the IMACE database, and accompanying IMACE guidebook

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