Evaluation and modeling of the size fractionated aerosol number concentration measurements near a major road in Helsinki

Evaluation and modeling of the size fractionated aerosol particle number concentration measurements nearby a major road in Helsinki – Part II: Aerosol measurements within the SAPPHIRE project

This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003 and 14 January–11 February 2004. The available information also included electronic traffic counts, on-site meteorological measurements, and urban background particle number size distribution measureme...

Evaluation and modelling of the size fractionated aerosol particle number concentration measurements nearby a major road in Helsinki – Part I: Modelling results within the LIPIKA project

A field measurement campaign was conducted near a major road “Itäväylä” in an urban area in Helsinki in 17–20 February 2003. Aerosol measurements were conducted using a mobile laboratory “Sniffer” at various distances from the road, and at an urban background location. Measurements included particle size distribution in the size range of 7 nm–10μm (aerodynamic diameter) by the Electrical Low Pr...

Evaluation of a coupled dispersion and aerosol process model

Evaluation of a coupled dispersion and aerosol process model against measurements near a major road M. A. Pohjola, L. Pirjola, A. Karppinen, J. Härkönen, M. Ketzel, and J. Kukkonen Finnish Meteorological Institute, Air Quality Research, Helsinki, Finland Helsinki Polytechnic, Department of Technology, Helsinki, Finland University of Helsinki, Department of Physical Sciences, Helsinki, Finland N...

Evaluation of a coupled dispersion and aerosol process model against measurements near a major road

Indoor and Outdoor Aerosol Particle Size Characterization in Helsinki

This thesis presented analysis and results from long-term and short-term aerosol particle measurements of indoor-outdoor total particle number and size distributions in Helsinki. This thesis focused on the temporal–spatial variations of aerosol particle number size distributions, the factors (including local wind, ambient temperature, and traffic density) influencing the particle number size di...