Upcoming changes to the emep grid
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Upcoming changes to the EMEP grid. Katarina Mareckova, Robert Wankmueller TFEIP Workshop 4 May 2011, Stockholm. History. From 1984 to 1998 a 150 x 150 km² grid was used From 1999 the grid resolution was changed to 50 x 50 km² but the covered area remained unchanged

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Upcoming changes to the EMEP grid

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Upcoming changes to the emep grid

Upcoming changes to the EMEP grid

Katarina Mareckova, Robert WankmuellerTFEIP Workshop 4 May 2011, Stockholm


History

History

  • From 1984 to 1998 a 150 x 150 km² grid was used

  • From 1999 the grid resolution was changed to 50 x 50 km² but the covered area remained unchanged

  • In 2008 the domain was extended to its current expansion to include EECCA countries and a larger part of the Russian Federation


Present gridding system

Present gridding system

  • Polar stereographic projection

  • Grid resolution: 50 x 50 km²

  • 10 SNAP sectors + National Total (sum of sectors)

  • Pollutants

    • MAIN: NOx, NMVOC, SOx, NH3, CO)(since 2008 by CEIP, before MSC-W)

    • PM (PM2.5, PMcoarse)(since 2008 by CEIP, before MSC-W)

    • HM (Pb, Cd, Hg) (since 2009 by CEIP, before MSC-E)

    • POPs (PCDD/PCDF, HCB, BaP)(since 2010 by CEIP, before MSC-E)


Proposed further modifications

Proposed further modifications

  • Change of the grid projection from the current polar-stereographic grid to geographical coordinates (latitude-longitude grid)

  • Increase of the grid resolution (0.2° x 0.2° or even 0.1° x 0.1°)

  • Gridding in GNFR sectors (introduced in 2009 with the new NFR reporting templates) instead of 10 SNAP sectors


Differences in grid cell areas

Differences in grid cell areas


Reporting of gridded data

Reporting of gridded data

  • New EMEP grid definition for all areas within the new EMEP domain

  • Adaption of the reporting templates

  • Gridded emissions have to be prapared in the new EMEP grid for reporting


New emep grid definition example

New EMEP-Grid definition example

  • Definition of a grid in geographic coordinates (WGS84) for all areas within the new EMEP domain (including fraction numbers for border grid cells)


Upcoming changes to the emep grid

ToDo

  • Grid definition for sea areas and the extended domain(Where should be the new grid domain borders?)

  • Agreement on GNFR sectors used for gridding

  • Definition of new „proxy base grids“(Derived from digitised maps, e.g. road network, shipping routes, airports, etc.)

  • Definition of new „base grids“ for the emission distribution of each pollutant and sector Derived from „proxy base grids“ and other spatial data (e.g. LPS data)

  • Specification and implementation of a new gridding software


Current domain borders in polar stereographic projection

Current domain borders In polar stereographic projection

Extended area of the

50 x 50 km² gridusedsince 2009

50 x 50 km² griduseduntil 2008


Current domain borders in geographic coodinate system wgs84

Current domain borders In geographic coodinate system (WGS84)

50 x 50 km² griduseduntil 2008 in WGS84

Extended area of the

50 x 50 km² gridusedsince 2009 in WGS84

New domainborders ?


Current and suggested new domain borders

Current and suggested new domain borders

30°N-82°N, 30°W-90°E

Figure provided by MSC-E


Estimated increase of grid data per year

Estimated increase of grid data per year

  • Current EMEP domain

    • 50 x 50 km² PS ~ 21.000 cellsx 10 SNAP sectors ~ 210.000 values / pollutant

  • Suggested new domain (30°N-82°N, 30°W-90°E)

    • 0.5° x 0.5° ~ 25.000 cellsx 15 GNFR sectors ~ 375.000 values / pollutant

    • 0.2° x 0.2° ~ 156.000 cellsx 15 GNFR sectors ~ 2.340.000 values / pollutant

    • 0.1° x 0.1° ~ 624.000 cellsx 15 GNFR sectors ~ 9.360.000 values / pollutant


Reported gridded emissions from current reporting templates

Reported gridded emissions from current reporting templates

  • Howto deal withreported gridded emissionsfromthecurrentreportingtemplates, whicharereported in thenew GNFR sectors, but usingthe 50 x 50 km² grid?

    Possiblesolution:

    • Gridded emissionsshouldbereported in thenew EMEP gridif data in thisresolutionisavailable

    • Reported gridded emissions in the 50 x 50 km² gridareconvertedintothenewgrid and used in thegriddingprocessamongotherproxy and LPS data

    • Ifno gridded emissionsarereported, thedistributionisperformedwithproxy and LPS data only


New gridded sectors

New gridded sectors

  • Proposalforaggregation of thecurrent GNFR sectorstobeused in models (forreporting?)


Thank you for your attention

Thank you for your attention


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