Development of air quality models for local scale dispersion as well as mesoscale to long range transport. Coordinator for groups in the department:

the Air Pollution Modelling (1993-95), Human Exposure and Urban Air Pollution (1998-2002). Head of the department's section for Human Exposure and hazardous organic compounds (2003-). Local scale modelling including participation in the development of the well-known Operational Street Pollution Model (OSPM) for pollution emitted from traffic in urban streets (1987-90). This work evolved into modelling human exposure to air pollution mainly from traffic (1994-). Coordination of two large applications on human exposure to air pollution funded by the Danish National Environmental Research Programme: HEAP (funded with 5 mill dkr) in 1996, and CONTRAF (funded with 7,5 mill dkr) in 2000. Mesoscale modelling of air pollution including a strong role in the development of the Atmospheric Chemistry and Deposition (ACDEP) model; a variable scale Lagrangian transport-chemistry model for describing nitrogen deposition to coastal marine waters. A special version of this model has been applied for describing the atmospheric chemical degradation of biogenic sulphur compounds (DMS) emitted from the sea. Coordinating of a study on air-sea exchange processes (ASEPS) that included a field experiment at Vindeby, Lolland, Denmark (1993-96). Apply each year the ACDEP-model for calculations of nitrogen deposition to the Danish Marine waters in the Danish Background Monitoring Programme (1995-). Have applied the ACDEP-model for calculations within several EU funded research projects.