Partner 12 - NILU (Norway)
Norwegian Institute for Air Research (NILU)

Expertise and experience of the organization
The NILU is an independent research foundation specialising in air pollution research from global to local problems and today is one of the largest European institutes in this field. NILU is the Chemical Co-ordinating Centre for EMEP and coordinates the work under the Convention on Long-Range Transboundary Air Pollution on particulate matter. NILU is a member of the European Environment Agency’s Topic Centre on Air Quality and Climate Change. NILU has 30 years experience in ambient trace gas measurements. NILU has been involved in several recent or current EC-research projects relevant to the MEGAPOLI proposal, such as EUCAARI, EUSAAR, CREATE, EARLINET-ASOS, Retro, SCOUT-O3, GMES-GATO, FORMAT, ASSET, FUMAPEX, Air4EU and ACCENT. NILU is also a member of the Nordic Centre of Excellence CBACCI (Biosphere – Atmosphere - Clouds – Climate – Interactions). 

Role and contribution

Implementation and application of subgrid emission parameterisations for selected megacities for use in air quality and exposure assessment. Participation in urban scale ensemble model analysis using the AirQUIS-EPISODE model. Application of the FLEXPART model at the global scale to compute the dispersion of emission tracers from megacities to study their transport characteristics and to discriminate between surface and upper tropospheric effects. Impact of North American megacity plumes, in particular from the New York megalopolis, onto European atmospheric composition by evaluation using the existing measurement data from European background stations (e.g., EMEP stations) and previous airborne campaigns combined with FLEXPART simulations to identify periods influenced by transport from North American megacities. The frequency and impact of such episodes on European air quality and chemical composition will be studied. NILU will co-ordinate WP5 and participate in WP2 and WP4.

Principal personnel involved
Dr. Andreas Stohl (Senior scientist; Ph.: +47-63898000; Fax: +47-63898050, e-mail: - is a senior researcher at NILU with more than 15 years of experience in the atmospheric sciences. His research focus is on the long-range transport of air pollution and he has worked extensively on intercontinental air pollution transport. He is author or co-author of 123 peer-reviewed publications and has edited a book about intercontinental air pollution transport. He was coordinator and/or PI in a large number of national and EU projects and currently co-ordinates the International Polar Year core project POLARCAT, with more than 100 partner institutions.
Dr. Bruce Denby (Senior scientist; Ph.: +47-63898164; Fax: +47-63898050, e-mail: - is a senior researcher at the Norwegian Institute for Air Research (NILU). He is chiefly involved in air quality modelling and assessment and coordinates model development and data assimilation activities within the department of Urban Environment and Industry. He participates in research and application related projects including recent EU projects such as Air4EU, CITYDELTA, FUMAPEX and EMECAP and is actively involved in a number of ETC/ACC tasks related to modelling and air quality assessment. He has experience in meteorological, atmospheric boundary layer, turbulence, chemical and also energy balance modelling.

Selected relevant publications
Law, K. S., A. Stohl (2007): Arctic air pollution: Origins and impacts. Science 315, 1537-1540.
Stohl, A. et al. (2007): Aircraft measurements over Europe of an air pollution plume from Southeast Asia – aerosol and chemical characterization. Atmos. Chem. Phys. 7, 913-937.
Stohl, A. et al. (2007): Arctic smoke – record high air pollution levels in the European Arctic due to agricultural fires in Eastern Europe. Atmos. Chem. Phys. 7, 511-534.
Stohl, A. et al. (2006): Pan-Arctic enhancements of light absorbing aerosol concentrations due to North American boreal forest fires during summer 2004. J. Geophys. Res. 111, D22214, doi:10.1029/2006JD007216.
Stohl, A. (2006): Characteristics of atmospheric transport into the Arctic troposphere. J. Geophys. Res. 111, D11306, doi:10.1029/2005JD006888.
Kukkonen, J., M. Pohjola, R.Sokhi, L. Luhana, N. Kitwiroon, L. Fragkou, M. Rantamäki, E. Berge, V. Odegaard, L. Håvard Slørdal, B. Denby, S. Finardi, 2005. Analysis and evaluation of selected local-scale PM10 air pollution episodes in four European cities: Helsinki, London, Milan and Oslo. Atmospheric Environment, 39, 2759–2773.

FP7 EC MEGAPOLI, 2008-2011