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!