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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

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



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)


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?)



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