Introduction

The International Cooperative Programme on Modelling and Mapping of Critical Levels and Loads and Air Pollution Effects, Risks and Trends

The objectives of the ICP Modelling and Mapping are

  • to determine receptor specific critical loads for indirect effects of the (long-term) deposition of various air pollutants, and critical levels for direct effects of gaseous air pollutants
  • to map pollutant depositions and concentrations which exceed critical thresholds
  • and to establish appropriate methods as a basis for assessing potential damage, e.g. via dynamic modelling.

The mandate of the Coordination Centre for Effects (CCE) in the National Institute for Public Health and the Environment (RIVM) includes the development of modelling and mapping methodologies for the assessment of critical loads and exceedances on a European scale.

At present 25 parties participate in the programme activities and contribute national data to to be integrated into European critical load maps. Results are published in CCE Status Reports and scientific journals. The maps are used for integrated assessment modelling by the Task Force on Integrated Assessment Modelling (TFIAM). A Mapping Manual produced in collaboration with other ICPs describes methods for calculating critical loads and levels, as well as for dynamic modelling to be used by National Focal Centres (NFCs).

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