README -- Describes contents of HEMCO/CO2/v2014-09/FOSSIL 23 Feb 2015 GEOS-Chem Support Team geos-chem-support@g.harvard.edu Overview: =============================================================================== This data directory contains updated annual and monthly fossil fuel CO2 emissions from CDIAC (version 2010 by R. Andres). The original files used to be stored in the prior GEOS-Chem data directory: GEOS_2x2.5/CO2_201003/fossilfuel_andres Christoph Keller (ckeller@seas.harvard.edu) wrote: Script scripts/FOSSIL_bpch2nc.sh was used to convert the original fossil fuel CO2 bpch-files into COARDS-compliant netCDF format. These files include aviation emissions (at ground level). Script scripts/AVCORR.sh can be used to split off aviation emissions and save them into an individual file. The fossil fuel emissions w/o aviation emissions are stored in files ending 'noav.nc', while aviation emissions only are saved in '*avonly.nc'. Note that aviation emissions are only a very small fraction of total emissions (less than 0.1 percent). -- Christoph Keller, August 2014. Files: =============================================================================== fossilCO2.annual.geos.2x25.nc fossilCO2.annual.geos.2x25.noav.nc fossilCO2.annual.geos.2x25.avonly.nc -- Annual CDIAC CO2 emissions from R. Andres, version 2010. Three files are prepared: (1) With all emissions (fossilCO2.annual.geos.2x25.nc ) (2) Without aviation emissions (fossilCO2.annual.geos.2x25.noav.nc ) (3) Just the aviation emissions (fossilCO2.annual.geos.2x25.avonly.nc) Resolution : GEOS-Chem 2 x 2.5 grid (144 x 91 boxes) Units : kg m-2 s-1 Timestamps : Yearly, 1979/01/01 thru 2009/01/01 Compression : Level 1 (e.g. nccopy -d1) fossilCO2.monthly.geos.2x25.nc fossilCO2.monthly.geos.2x25.noav.nc fossilCO2.monthly.geos.2x25.avonly.nc -- Monthly CDIAC CO2 emissions from R. Andres, version 2010. Three files are prepared: (1) With all emissions (fossilCO2.monthly.geos.2x25.nc ) (2) Without aviation emissions (fossilCO2.monthly.geos.2x25.noav.nc ) (3) Just the aviation emissions (fossilCO2.monthly.geos.2x25.avonly.nc) Resolution : GEOS-Chem 2 x 2.5 grid (144 x 91 boxes) Units : kg m-2 s-1 Timestamps : Yearly, 1979/01/01 thru 2009/01/01 Compression : Level 1 (e.g. nccopy -d1) fossilCO2.geos.2x25.nc fossilCO2.geos.2x25.noav.nc fossilCO2.geos.2x25.avonly.nc -- "Generic" fossil fuel emissions. These are the annual CDIAC CO2 emissions for year 1995 (although the timestamp is for 1985). Three files are prepared: (1) With all emissions (fossilCO2.geos.2x25.nc ) (2) Without aviation emissions (fossilCO2.geos.2x25.noav.nc ) (3) Just the aviation emissions (fossilCO2.geos.2x25.avonly.nc) Resolution : GEOS-Chem 2 x 2.5 grid (144 x 91 boxes) Units : kg m-2 s-1 Timestamps : 1985/01/01 Compression : Level 1 (e.g. nccopy -d1) ############################################################################### ##### ORIGINAL README FOLLOWS HERE ##### ############################################################################### README file for CDIAC monthly fossil fuel CO2 emissions in GEOS-Chem -- The Carbon Dioxide Information Analysis Center (CDIAC) fossil fuel (and cement manufacture) CO2 emission inventory is available courtesy of Robert J. Andres (CDIAC). These inventory files can be used in the GEOS-Chem CO2 simulation in v8-03-02 or later with no modifications to the code if the files are saved to the appropriate directory below: /data/ctm/GEOS_2x2.5/CO2_201003/fossil_andres/annual /data/ctm/GEOS_2x2.5/CO2_201003/fossil_andres/monthly /data/ctm/GEOS_4x5/CO2_201003/fossil_andres/annual /data/ctm/GEOS_4x5/CO2_201003/fossil_andres/monthly Inventory bpch files are available spanning 1979-2007 using the CDIAC (version 2010) values regridded from the1 degree by 1 degree inventory (native resolution available on special request). 2008-2009 files are available based on scaling the 2007 inventory values with publicly available 2008 and 2009 preliminary fossil fuel consumption statistics from the energy company BP. The scaled values in this release are more reliable than the scaled annual values (for 2007-2009) in the v8-03-02 release (described in Nassar et al. 2010), which we no longer recommend using. Since the CDIAC inventory is updated each year (for all years in the inventory), users may want to rename their inventory directories with version numbers (and change the code appropriately) rather than overwriting files, for example: /data/ctm/GEOS_2x2.5/CO2_201003/fossil_andres/monthly_v2010 Lastly, when using the inventory in GEOS-Chem, please remember to cite the following papers and consult them for further details: * Andres, R. J., Gregg, J. S., Losey, L., Marland, G., and Boden, T. A.: Monthly, global emissions 10 of carbon dioxide from fossil fuel consumption, Tellus B, accepted, 2011. * Nassar, R., Jones, D. B. A., Suntharalingam, P., Chen, J. M., Andres, R. J., Wecht, K. J., Yantosca, R. M., Kulawik, S. S., Bowman, K. W., Worden, J. R., Machida, T., and Matsueda, H.: Modeling global atmospheric CO2 with improved emission inventories and CO2 production from the oxidation of other carbon species, Geosci. Model Dev., 3, 689-716, doi:10.5194/gmd-3-689-2010, 2010. -- Ray Nassar 2011-02-24 ray.nassar@ec.gc.ca