EMEP MSC-W modelled air concentrations and depositions

The depositions of sulphur (S) and nitrogen (N), and air concentrations of ozone (O₃) and particulate matter (PM) available here are calculated with the EMEP MSC-W model as reported in the annual EMEP status reports.

Data produced by EMEP/MSC-W are licensed under Norwegian license for public data (NLOD) and Creative Commons 4.0 BY International. Credit should be given to The Norwegian Meteorological institute, shortened "MET Norway", as the source of data. Some suggestions: "Data from The Norwegian Meteorological Institute", "Based on data from MET Norway".

Available data for download on this page is the most recent gridded data on NetCDF format and country source receptor tables on CSV format.

Earlier reported data is still downloadable from the old EMEP MSC-W modelled data page.

• Gridded data on NetCDF format

  Yearly, monthly, daily and hourly gridded NetCDF files are available on EMEP 0.1º x 0.1º longitude-latitude grid (EMEP01deg) for the reported compounds (definitions and acronyms) from the met.no THREDDS data server (TDS) with OPeNDAP access. (Subsets of variables can be selected and data viewers are available for plotting.)

  Yearly NetCDF file for 2016 are available directly from:

  NetCDF files for all years and time resolutions are available through THREDDS:

  Results for YEAR (TYPE)	TIME RESOLUTION	GRID	reported in
  2017 (2016 emissions) 2016 (Type1) 2000-2015 (Type2)	year+month+day+hour	EMEP01deg	EMEP Status Report 1/2018

  The NetCDF files have the following convention (References):
  {GRID}_{MODEL VERSION}_{TIME RESOLUTION}.{YEAR}met_{EMISSION YEAR}emis_({REPORTING YEAR}).nc

   

• SR Tables

  Downloadable Excel-compatible tables with yearly country-to-country source-receptor matrices for all reported compounds (definitions and acronyms) with the different emission reductions for all emitting regions and their identifying codes:

  Latest model results	reported in
  	EMEP Status Report 1/2018

  The source-receptor (SR) relationships give the change in air concentrations or depositions resulting from a change in emissions from each emitter country. For each country, reductions in six different pollutants have been calculated separately: with an emission reduction of 15% for SOx, NOx, NH3, NMVOC, PPM2.5 or PPMcoarse respectively. The deposition tables show the contribution from one country to another. They have been calculated adding the differences obtained by a 15% reduction for all emissions in one country multiplied by a factor of 100/15, in order to arrive at total estimates. For the concentrations and indicator tables, the differences obtained by the 15% emission reduction of the relevant pollutants are given directly. Thus, the tables should be interpreted as estimates of this reduction scenario from the chemical conditions of the given year.

   

  Types of model calculations

  As the EMEP MSC-W model calculations are changing with time, not only because of EMEP MSC-W model updates, but also due to modifications of the input data (e.g. revised emission data and meteorology). In broad terms, two types of model results can be distinguished:
  • Type1) Model results that have been officially reported in the annual EMEP status reports, based on model simulations using the best available input data (emissions, meteorology, etc.) at the time of reporting.
  • Type2) Model results from later re-calculations, using updated input data which were not available at the time of reporting (e.g. revised and improved emission data for the past, meteorological data on finer resolution, etc.)

  Model results of Type1 are labeled by the year they are calculated for (e.g. '*2016met*' etc.), while model results of Type2 are further labeled by the year when the re-calculation was made. E.g. '*2013met_2013emis_rep2016*' refers to model results for the year 2013, which were obtained in 2016 using the best data available in 2016. Model results of Type2 should be preferred when doing trend analyses.

   

  References

  • Trends of Air-concentrations and depositions:
    Transboundary particulate matter, photo-oxidants, acidifying and eutrophying components, EMEP Status Report 1/2018, ISSN 1504-6109 (print), ISSN 1504-6192 (online)

   

   

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  emep.mscw@met.no