####### README ####### The Open-source Data Inventory for Anthropogenic CO2 (ODIAC), version 2018 (ODIAC2018) !!! PLEASE READ OUR DATA POLICY (http://db.cger.nies.go.jp/dataset/ODIAC/data_policy.html) !!! 1) ODIAC2018 The Open-source Data Inventory for Anthropogenic CO2 (ODIAC) is a global high resolution fossil fuel CO2 emission data product (Oda and Maksyutov, 2011; Oda et al., 2018). The year 2018 version of ODIAC (ODIAC2018, 2000-2017) is based on the latest country ffco2 estimates (2000-2015) made by the Carbon Dioxide Information Analysis Center (CDIAC) at the Oak Ridge National Lab (ORNL) (Boden et al., 2018). Emission spatial disaggregation was done using multiple spatial proxy data, such as geographical location of point sources, satellite observations of nightlights, and aircraft and ship fleet tracks. The emissions seasonality was taken from the CDIAC monthly gridded data product. The year 2015 CDIAC country-level estimates were projected for the recent years (2016 and 2017) using fuel consumption data reported by the BP statistical review of the world. The ODIAC approach, methodology, and etc. are described in Oda et al. (2018) ESSD. 2) Data format and unit ODIAC emission data product is provided in two spatial resolutions: 1x1 km and 1x1 degree. The 1x1 km ODIAC emission data files are provided in GeoTIFF format (https://trac.osgeo.org/geotiff/). Values are provided in the unit of tonne carbon/cell (monthly total). Note the 1 x1 km ODIAC emission files only include emissions over land regions. Emissions from international aviation and marine bunker emissions are NOT included. The 1x1 degree ODIAC emission data files are provided in netCDF format (https://www.unidata.ucar.edu/software/netcdf/). Values are provided in the unit of gram carbon/m2/day (monthly mean). 3) Global scaling factor We applied a global scaling factor to match the sum of country total emissions to the CDIAC global total emissions. Below is the list of the global scaling factors used in the production of ODIAC2018. See more the section 3.1 and the table A2 in Oda et al. (2018) ESSD. Global total Year ffco2 in PgC Scaling factor ---- ------------ -------------- 2000 6.733 0.9996 2001 6.892 1.0168 2002 6.993 1.0084 2003 7.375 1.0127 2004 7.743 1.0140 2005 8.039 1.0179 2006 8.338 1.0193 2007 8.505 1.0097 2008 8.776 1.0142 2009 8.698 1.0165 2010 9.129 1.0143 2011 9.482 1.0168 2012 9.645 1.0177 2013 9.751 1.0255 2014 9.842 1.0258 2015 9.884 1.0265 2016 9.931 - 2017 10.066 - ---- ------------ -------------- 3) References Boden, T.A., G. Marland, and R.J. Andres. 2018. Global, Regional, and National Fossil-Fuel CO2 Emissions. Carbon Dioxide Information Analysis Center at Appalachian State University, Boone North Carolina, https://energy.appstate.edu/CDIAC. BP. 2018. Statistical Review of World Energy - all data, 1965-2017 (year 2018 edition), https://www.bp.com/en/global/corporate/energy-economics/statistical-review-of-world-energy/downloads.html. Oda, T. and Maksyutov, S. 2011. A very high-resolution (1 km x 1 km) global fossil fuel CO2 emission inventory derived using a point source database and satellite observations of nighttime lights, Atmos. Chem. Phys., 11, 543-556, https://doi.org/10.5194/acp-11-543-2011. Oda, T., Maksyutov, S., and Andres, R. J. 2018. The Open-source Data Inventory for Anthropogenic CO2, version 2016 (ODIAC2016): a global monthly fossil fuel CO2 gridded emissions data product for tracer transport simulations and surface flux inversions, Earth Syst. Sci. Data, 10, 87-107, https://doi.org/10.5194/essd-10-87-2018. 4) Contact The ODIAC team (help at odiac.org) Dr. Shamil Maksyutov (NIES contact point) Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan. Dr. Tomohiro Oda (Project lead) Goddard Earth Science Technology and Research, Universities Space Research Association Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, MD, USA. UPDATED ON DEC13, 2018