####### README ####### The Open-source Data Inventory for Anthropogenic CO2 (ODIAC), version 2020 (ODIAC2020) !!! PLEASE READ OUR DATA POLICY (http://db.cger.nies.go.jp/dataset/ODIAC/data_policy.html) !!! 1) ODIAC2020 The Open-source Data Inventory for Anthropogenic CO2 (ODIAC) is a global high-resolution fossil fuel CO2 emission (ffco2) data product (Oda and Maksyutov, 2011; Oda et al., 2018). The year 2020 version of ODIAC (ODIAC2020, 2000-2019) is based on the latest country ffco2 estimates (2000-2017) made by the new Carbon Dioxide Information Analysis Center (CDIAC) team at Appalachian State University (AppState, Gilfillan et al. 2020). The 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. Based on our recent study, we corrected the power plant information for Poland and Ukraine (see Oda et al. 2019). The emissions seasonality was taken from the CDIAC monthly gridded data product (Andres et al. 2011). The year 2017 CDIAC country-level estimates were projected for the recent years (2018 and 2019) using fuel consumption data reported by the latest BP statistical review of the world (BP, 2020). The ODIAC approach, methodology, and etc. are described in Oda et al. (2018) ESSD. 2) Data format and unit The 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 1x1 km ODIAC emission files only include emissions over land regions. Emissions from international aviation and marine bunker 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 ODIAC2020. See more in the section 3.1 and the table A2 in Oda et al. (2018) ESSD. Global total Year ffco2 in PgC Scaling factor ---- ------------ -------------- 2000 6.763 1.0086 2001 6.802 1.0083 2002 6.963 1.0094 2003 7.342 1.0136 2004 7.675 1.0114 2005 7.989 1.0182 2006 8.248 1.0166 2007 8.463 1.0132 2008 8.662 1.0110 2009 8.530 1.0092 2010 8.992 1.0136 2011 9.277 1.0105 2012 9.478 1.0166 2013 9.568 1.0246 2014 9.595 1.0198 2015 9.623 1.0221 2016 9.674 1.0287 2017 9.790 1.0229 2018 10.012 - 2019 10.061 - ---- ------------ -------------- 3) References Andres, R.J., Gregg, J.S., Losey, L., Marland, G. and Boden, T. 2011. Monthly, global emissions of carbon dioxide from fossil fuel consumption, Tellus, 63 (3), 309-327, https://doi.org/10.1111/j.1600-0889.2011.00530.x BP. 2020. Statistical Review of World Energy - all data, 1965-2019 (year 2020 edition), https://www.bp.com/en/global/corporate/energy-economics/statistical-review-of-world-energy.html (the last assess date: 12/03/20) Gilfillan, D., Marland, G., Boden, T. And Andres, R. 2020). Global, Regional, and National Fossil-Fuel CO2 Emissions: 1751-2017. CDIAC-FF, Research Institute for Environment, Energy, and Economics, Appalachian State University. doi:10.15485/1712447 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. Oda, T., Bun, R., Kinakh, V., Topylko, P., Halushchak, M., Marland, G., Lauvaux, T., Jonas, M., Maksyutov, S., Nahorski, Z., Lesiv, M., Danylo, O. and Horabik-Pyzel, J.: Errors and uncertainties in a gridded carbon dioxide emission inventory, Mitigation and Adaptation Strategies for Global Change, https://doi.org/10.1007/ s11027-019-09877-2 , 2019 4) Contact The ODIAC team (help at odiac.org) Dr. Shamil Maksyutov (NIES contact point) The Satellite Observation Center, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan. Dr. Tomohiro Oda (Project lead) The Earth from Space Institute, Universities Space Research Association, MD, USA. NOTE: Data users are encouraged to report possible errors in the data product. However, we will NOT respond to requests solely for technical assistance on the data use. UPDATED ON DEC04, 2020