Cecilia Bennet

ECDS - a Swedish Research Infrastructure for the Open Sharing of Environment and Climate Data

Environment Climate Data Sweden (ECDS) is a new Swedish research infrastructure, furthering the reuse of scientific data in the domains of environment and climate. ECDS consists of a technical infrastructure and a service organization, supporting the management, exchange, and re-use of scientific data. The technical components of ECDS include a portal and an underlying data catalogue with information on datasets. The datasets are described using a metadata profile compliant with international standards. The datasets accessible through ECDS can be hosted by universities, institutes, or research groups or at the new Swedish federated data storage facility Swestore of the Swedish National Infrastructure for Computing (SNIC).

A regional model for surface ozone in Southeast Asia

As part of the model intercomparison study MICS Asia II, the Swedish MATCH model was set up for Southeast and East Asia. In that study, the comprehensive photochemistry scheme of MATCH was used for the first time in Asia. The current work focuses on results of surface ozone from the MATCH model simulations falling outside the model intercomparison study. Model results of surface ozone concentrations for the entire year of 2001 were investigated and compared with measurements in Southeast Asia. The model produced higher surface ozone concentrations than the observations at all of the non-remote stations investigated but underestimated during the dry season at remote locations. Modelled seasonal variation was similar to, but less pronounced than, the variation in the measurements. This study indicates that NOx is the limiting precursor for ozone production in the model, while the fractionation in different species and total amount of non-methane volatile organic compounds (NMVOC) emissions are less important. Naturally emitted NMVOC, isoprene, is an important precursor of surface ozone at certain conditions, and a better inventory of these emissions is needed. Deposition velocities of ozone also have impact on surface concentrations. To improve the model performance, it is important to add a land use inventory with corresponding deposition velocities.

Exposure Modeling of Traffic and Wood Combustion Emissions in Northern Sweden

Traffic and residential wood combustion (rwc) constitute the two dominating local sources to fine particulate matter PM2.5 concentration levels in Sweden. In order to meet the authorities’ requirements of air quality assessments, a national modelling system SIMAIR has been developed. The system is based on the commercial Airviro air quality management software, a three tier client/server/web system which includes modules for measurement data collection, emission databases and dispersion models with very high performance in terms of data access and model execution. The technical characteristics of Airviro databases and models have facilitated web based national air quality systems, of which some examples are given.