Download - Upcoming changes to the EMEP grid
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Upcoming changes to the EMEP grid
Katarina Mareckova, Robert WankmuellerTFEIP Workshop
4 May 2011, Stockholm
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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
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Present gridding system
Polar stereographic projectionGrid resolution: 50 x 50 km²10 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)
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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
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Differences in grid cell areas
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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
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New EMEP-Grid definition exampleDefinition of a grid in geographic coordinates
(WGS84) for all areas within the new EMEP domain (including fraction numbers for border grid cells)
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ToDoGrid 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
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Current domain borders In polar stereographic projection
50 x 50 km² grid used until 2008
Extended area of the 50 x 50 km² grid used since 2009
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Current domain borders In geographic coodinate system (WGS84)
50 x 50 km² grid used until 2008 in WGS84
Extended area of the 50 x 50 km² grid used since 2009 in WGS84
New domain borders ?
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Current and suggested new domain borders
30°N-82°N, 30°W-90°EFigure provided by MSC-E
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Estimated increase of grid data per yearCurrent EMEP domain
50 x 50 km² PS ~ 21.000 cells x 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 cells
x 15 GNFR sectors ~ 375.000 values / pollutant
0.2° x 0.2° ~ 156.000 cells x 15 GNFR sectors ~ 2.340.000 values / pollutant
0.1° x 0.1° ~ 624.000 cells x 15 GNFR sectors ~ 9.360.000 values / pollutant
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Reported gridded emissions from current reporting templatesHow to deal with reported gridded emissions
from the current reporting templates, which are reported in the new GNFR sectors, but using the 50 x 50 km² grid?
Possible solution:Gridded emissions should be reported in the new
EMEP grid if data in this resolution is availableReported gridded emissions in the 50 x 50 km² grid
are converted into the new grid and used in the gridding process among other proxy and LPS data
If no gridded emissions are reported, the distribution is performed with proxy and LPS data only
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New gridded sectorsProposal for aggregation of the current GNFR
sectors to be used in models (for reporting?)
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Thank you for your attention