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A uniform Emissions Pre-processor for GEOS-Chem
(EPGC)
Qiang Zhang, Xin Yu, Meng Li, and Kebin He Center for Earth System Science, Tsinghua University Presented at 6th International GEOS-Chem meeting, Harvard University, May 6-9, 2013
Motivation of this work
I want to run GC model for the year 2008. I would like to use highest resolution emission data from the best available inventories in the world:
EDGAR v.4.2 global emission inventory
NEI inventory for U.S.
EMEP inventory for Europe
REAS v.2 for Asia (Kurokawa et al., ACPD, 2013)
MEIC database for China (developed by myself)
Features in those inventories
Emissions Years Spatial Resolution
Temporal resolution Available Species Spatial
Coverage EDGAR v4.2 1970-2008 0.1x0.1 annual NOx, SO2, CO, NH3, NMVOC, PM10, CO2 Global
NEI 1999, 2002, 2005 4km hourly NOx, SO2, CO, NH3, PM2.5, PM10, speciated VOC US
EMEP 1980,1985,1990-2007 0.5x0.5 year NOx, SO2, CO, NH3, NMVOC, PM2.5, PM10 Europe
REAS v2 2000-2008 0.25x0.25 month NOx, SO2, CO, NH3, NMVOC, BC, OC, PM2.5, PM10, CO2 Asia
MEIC 1990-2010 0.25x0.25 month NOx, SO2, CO, NH3, BC, OC, PM2.5, PM10, Speciated VOC, CO2 China
I need emission data for SO2, NOx, CO, NH3, BC, OC, and speciated VOC for the year 2008, but
EDGAR: no BC/OC, no speciated VOC, 1970-2008
NEI, no BC/OC, 1999, 2002, 2005
EMEP : no BC/ OC, no speciated VOC, 1990-2007
REAS: no speciated VOC, 2000-2008
MEIC: all species, 2008 and 2010
Every emission inventory is incomplete!
Function of EPGC
1. Prepare input dataset
2. Identify the components you need through configuration files
3. Run EPGC
• Provide mosaic emission dataset from available inventories
• Easy to add new inventories
• Cross platform (developed by Java)
How EPGC works
Input data for EPGC: emissions
• Gridded emission data
• Gridded scale factor
annual or monthly
can be sectorized
netCDF format
Spatial Resolution
Species and Sector
Name/yyyy.nc (or yyyymm.nc) ||| species_sector
Configuration file of EPGC
For NMVOC, I would like to use EDGAR as global default, with replacement of EMEP for Europe, NEI for United States and scaled to 2008, MEIC for China, and REAS for other Asian countries.
{ "type" : "Target", "name" : "t2", "shape" : [90,144], //2x2.5 degree resolution "base" : "data/2", "beginDate" : "200801", "endDate" : "200812", "zorder" : [ "MEIC","REAS", "EMEP", “NEI" , "SF_NEI", "EDGAR" ], //priority "defaultEmission": "EDGAR", "timeScale" : “annual", //temporal resolution "species" : ["ACET","ALD2","ALK4","C2H6","C3H8","CH2O","MEK","PRPE“] "clip" : { "bottom":0, "left": 0, "width":144, "height":90 }, //global "pathTemplate" : "<ta.base>/<es.name>/<es.date>.nc|||<es.species>_<es.sector>" }
Configuration of EPGC: VOC speciation
For inventories which only have total NMVOC emissions, Converting factors for each sector from total VOC emissions to VOC species in GEOS-Chem model
Results
Configuration file of EPGC
{ "type" : "Target", "name" : "t2", "shape" : [720,1152], //0.25x0.3125 degree resolution "base" : "data/2", "beginDate" : "200801", "endDate" : "200812", "zorder" : [ "MEIC","REAS", "EDGAR" ], //priority "defaultEmission": "EDGAR", "timeScale" : " monthly", //temporal resolution “species” : [" SO2 ", " NOx ", " CO "], "clip" : { "bottom":420, "left": 800, "width":225, "height":161 }, // 70E-140E, 15N-55N "pathTemplate" : "<ta.base>/<es.name>/<es.date>.nc|||<es.species>_<es.sector>" }
I also want to run nested model over East Asia at 0.25*0.3125 horizon resolution . I would like to use EDGAR as global default, with replacement of MEIC for China, and REAS for other Asian countries. I want to look at emissions for each sector.
Configuration of EPGC: Sector mapping
Domain: 70E-140E, 15N-55N
Results
Issues need to be addressed
Coordinating with Christoph’s work
Adding support to Aviation & Shipping emissions
Better treatment of temporal profiles
On-line calculation capability
Thanks for your attention!
Comments & contributions are desired!