Topas

This source apportionment service is a product based on the chemical transport model LOTOS-EUROS and the emission knowledge developed at TNO. Information on intercontinental transport and forest fire emissions are taken from the Copernicus Atmospheric Monitoring Service. Modelled source specific PM concentrations representing urban background conditions are uploaded daily before noon.

Coming soon: Yearly and daily average contributions for 2023.  Up till then if you are interested in archived yearly and or daily products, please contact our colleagues of the TOPAS team through the email address topas@tno.nl and describe your intended use of the information of TOPAS.

NOTE

Due to a recent update of TOPAS, you may experience that visiting the tool appears to return an empty page. In this case, clearing the cache of your browser may solve the issue. If that does not solve the problem, please contact us and we’ll try to remedy the issue.