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".
Yearly, monthly, daily and hourly gridded NetCDF (CF convention) files are available on EMEP 0.1º x 0.1º longitude-latitude grid (EMEP_gridding_system_documentation, EMEP01 domain map)
for the reported compounds from the met.no THREDDS data server
(TDS) with OPeNDAP access (Data viewers are available for plotting.)
More information about the model runs and grid domain can be found in the References and definitions of compounds in chapter 1.2 of corresponding EMEP Status Report.
Latest reported yearly NetCDF file available directly from:
NetCDF files for latest reported years and time resolutions available through THREDDS:
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, using the best available input data (emissions, meteorology, etc.) at the time of reporting.
Type2) Model results from re-calculations, using updated input data which were not
available at the time of that reported year in previous EMEP status reports (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. '*2019met*' etc.), while model
results of Type2 are further labeled by the year when the re-calculation was made. E.g. '*2018met_2018emis_rep2021*'
refers to model results for the year 2018, which were obtained in 2021 using the best data available in 2018.
Model results of Type2 should be preferred when doing trend analyses, but to be used with caution depending on available input data for the particular years.
Downloadable Excel-compatible tables with yearly country-to-country source-receptor
matrices for all reported compounds with the different emission
reductions for all emitting regions and their identifying codes:
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 five different pollutants have been calculated separately: with an emission reduction of 15%
for SOx, NOx, NH3, NMVOC and PPM10 (as a sum of PPM2.5 and 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.
More information about SR calculations can be found in chapter 5 of
EMEP Status Report 1/2018 and definitions of compounds in chapter 1.2 of latest
EMEP Status Report.
Accumulated Ozone over 40 ppb for forest --- EUAOT40_Forests
Accumulated Ozone over 40 ppb for agricultural crops --- EUAOT40_Crops
Accumulated Ozone over 40 ppb for forest at upper canopy (MM=(UNECE) Mapping Manual, IAM=Integrated Assessment Modelling, DF=Decidous Forest)
--- MMAOT40_IAM_DF
Accumulated Ozone over 40 ppb over growing season for wheat (as a surrogate for temperate crops) (MM=(UNECE) Mapping Manual, IAM=Integrated
Assessment Modelling, CR=CRops) --- MMAOT40_IAM_CR
Ozone Fluxes for deciduous forests (POD1 gen forest, IAM=Integrated Assessment Modelling, DF=Decidous Forest) (Only available since
EMEP Status Report 1/2019 due to revision)
--- POD1_IAM_DF
Ozone Fluxes for growing season (POD3 gen crops, IAM=Integrated Assessment Modelling, DF=Decidous Forest) (Only available since
EMEP Status Report 1/2019 due to revision)
--- POD3_IAM_CR
Dry deposition of oxidized sulphur per m2 grid --- DDEP_SOX_m2Grid
Dry deposition of oxidized sulphur per m2 Coniferous Forest --- DDEP_SOX_m2Conif
Dry deposition of oxidized sulphur per m2 Decidous Forest --- DDEP_SOX_m2Decid
Dry deposition of oxidized sulphur per m2 Seminatural --- DDEP_SOX_m2Seminat
Wet deposition of oxidized sulphur --- WDEP_SOX
Dry deposition of oxidized nitrogen per m2 grid --- DDEP_OXN_m2Grid
Dry deposition of oxidized nitrogen per m2 Coniferous Forest --- DDEP_OXN_m2Conif
Dry deposition of oxidized nitrogen per m2 Decidous Forest --- DDEP_OXN_m2Decid
Dry deposition of oxidized nitrogen per m2 Seminatural --- DDEP_OXN_m2Seminat
Wet deposition of oxidized nitrogen --- WDEP_OXN
Dry deposition of reduced nitrogen per m2 grid --- DDEP_RDN_m2Grid
Dry deposition of reduced nitrogen per m2 Coniferous Forest --- DDEP_RDN_m2Conif
Dry deposition of reduced nitrogen per m2 Decidous Forest --- DDEP_RDN_m2Decid
Dry deposition of reduced nitrogen per m2 Seminatural --- DDEP_RDN_m2Seminat
Wet deposition of reduced nitrogen --- WDEP_RDN
Precipitation --- WDEP_PREC
[1] NO3 in PM2.5 (includes 27% of coarse NO3: SURF_ug_NO3_F+ 0.27*SURF_ug_NO3_C)
[2] Further definitions and acronyms are updated in Chapter 1.2 from latest EMEP Status Reports and more information
can be found in Simpson, 2012
[3] Total deposition of oxidized sulphur (Dry+Wet oxS = DDEP_SOX_m2Grid+WDEP_SOX), Total deposition of oxidized nitrogen
(Dry+Wet oxN = DDEP_OXN_m2Grid+WDEP_OXN), Total deposition of reduced nitrogen (Dry+Wet RdN = DDEP_RDN_m2Grid+WDEP_RDN)
DEP_SOX (SO2, SO4), WDEP_SOX (SO2, SO4), DDEP_OXN (NO2, PAN, MPAN, HNO3, HONO, NO3_f, NO3_c), WDEP_OXN (HNO3, HONO, NO3_f, NO3_c), DDEP_RDN (NH3, NH4_f), WDEP_RDN (NH3, NH4_f)
and more information can be found in Simpson, 2012
