README -- describes contents of HEMCO/BB4CMIP6/v2019-07 08 Aug 2019 Pengfei Liu (pengfeiliu@fas.harvard.edu) and the GEOS-Chem Support Team (geos-chem-support@g.harvard.edu) Overview: ============================================================================== Fire Emissions for CMIP6 Reference:van Marle, M. J. E., Kloster, S., Magi, B. I., Marlon, J. R., Daniau, A.-L., Field, R. D., Arneth, A., Forrest, M., Hantson, S., Kehrwald, N. M., Knorr, W., Lasslop, G., Li, F., Mangeon, S., Yue, C., Kaiser, J. W., and van der Werf, G. R.: Historic global biomass burning emissions for CMIP6 (BB4CMIP) based on merging satellite observations with proxies and fire models (1750–2015), Geosci. Model Dev., 10, 3329-3357, https://doi.org/10.5194/gmd-10-3329-2017, 2017. For more information see the original description of BB4CMIP included in this directory. README_BB4CMIP.txt (retieved from https://www.globalfiredata.org/ar6historic.html) Original data were downloaded from the CMIP6 project website: https://esgf-node.llnl.gov/projects/input4mips/ and were processed for GEOS-Chem. The processing scripts can be found in the code/ subdirectory. The MATLAB code were used to generate all variables except HCl. The HCl emission was processed using the python code. Emission factors for different types of vegetation were retrived from Andreae, M. O.: Emission of trace gases and aerosols from biomass burning – an updated assessment, Atmos. Chem. Phys., 19, 8523-8546, https://doi.org/10.5194/acp-19-8523-2019, 2019. VOCs were converted from kg m-2 to kgC m-2. Files for different species were concatenated for fast I/O. The script is available in the code/ subirectory. Notes for reading BB4CMIP6 emissions into GEOS-Chem via HEMCO: ============================================================================== The sample HEMCO_Config_template.UCX (contained in this folder) provides an example of historical simulation using GEOS-Chem. This simulation uses BB4CMIP for biomass burning emissions and CEDS for anthropogenic emissions. The year of emission fields must be specified explicitly by $EmisYear in HEMCO_Config.rc. The simulation time set in input.geos only affects meteorological fields. For historical simulations, the year of emission fields can be different from the year of meteorological fields, which allow us to test the influences of meteorology and emission seperately. -- Contact: Pengfei Liu (pengfeiliu@fas.harvard.edu) The original README file follows below: =============================================================================== Fire Emissions for CMIP6 Last revision: July 14, 2016 Contact details: Margreet van Marle (m.j.e.vanmarle@vu.nl), Guido van der Werf (guido.vander.werf@vu.nl) Summary This package contains netCDF files of biomass burning emissions. BB4CMIP6 is available from the project web site (CMIP6 https://esgf-node.llnl.gov/projects/input4mips/), and a paper describing the dataset will be submitted to the CMIP6 GMD special issue (Van Marle et al (2016), in prep. http://www.geosci-model-dev.net/special_issue590.html). Our aim is to provide historic burning biomass estimates, by combining satellite-observed fire emissions with regional proxy datasets (charcoal for North America and Europe, and visibility observations for Indonesia and the Arc of Deforestation) and modeled data. The modeled data is the result from Fire-MIP and data of the following models are used: SIMFIRE-GDP, CLM, INFERNO, JSBach-SPITFIRE, LPJ-GUESS-SPITFIRE, ORCHIDEE-SPITFIRE Overview This fire emissions dataset was produced by the Vrije Universiteit Amsterdam, cluster Earth and Climate (http://www.globalfiredata.org). The package contains monthly estimates of open biomass burning emissions (forests, grasslands, agricultural waste burning on fields, peatlands). The bulk emissions for the following species: BC, CH4, CO, CO2, N2O, NH3, NMVOC, NOx, OC, and SO2 are provided. The NMVOC bulk emissions consists of the scum of C2H6, CH3OH, C2H5OH, C3H8, C2H2, C2H4, C3H6, C5H8, C10H16, C7H8, C6H6, C8H10, Toluene_lump, Higher_Alkenes, Higher_Alkanes, CH2O, C2H4O, C3H6O, NH3, C2H6S, HCN, HCOOH, CH3COOH, MEK, CH3COCHO, HOCH2CHO. These NMVOCs are also provided separately Species emissions are calculated using dry matter estimates and emission factors developed for GFED - http://www.falw.vu/~gwerf/GFED/GFED4/ancill/GFED4_Emission_Factors.txt. More information including lumping and molecular weights can be found in http://www.falw.vu/~gwerf/GFED/GFED4/ancill/GFED4_Emission_Factors.xlsx Usage Notes Be careful not to double count deforestation carbon emissions, they are included in the bulk estimates per specie, but several models also have deforestation carbon emissions based on for example historical deforestation rates. Please check if the global annual emissions for the first and last year of the file are correct. These are provided in the attributes [annual_total_firestyar_Tg_yr] and [annual_total_lastyear_Tg_yr] All files are named “biomass_burning_carbon_flux” but resemble other species as well. Gridded Datasets 'CH4', 'SO2', 'NOx', 'N2O', 'CO', 'BC', 'OC', 'NH3', 'NMVOCs', 'CO2' Per 2 files: 1 covering time period 175001-184912, 1 covering 185001-201512 NMOVCs is the sum of all NMVOC species listed below at NMVOC_ NMVOC_ biomass burning emissions per nmvoc specie Per 2 files: 1 covering time period 175001-184912, 1 covering 185001-201512 'C2H6' , 'CH3OH' , 'C2H5OH' , 'C3H8' , 'C2H2' , 'C2H4' , 'C3H6' , 'C5H8' , 'C10H16' , 'C7H8' , 'C6H6' , 'C8H10' , 'Toluene_lump' , 'Higher_Alkenes' , 'Higher_Alkanes' , 'CH2O' , 'C2H4O' , 'C3H6O' , 'NH3' , 'C2H6S' , 'HCN' , 'HCOOH' , 'CH3COOH' , 'MEK' , 'CH3COCHO', 'HOCH2CHO' percentageAGRI Percentage of bulk emissions related to agricultural waste burning. Annual percentages from 1750-2016 percentageDEFO Percentage of bulk emissions related to fires used in the deforestation. Annual percentages from 1750-2016 Beware of double-counting of CO2 emissions if your model already accounts for deforestation carbon emissions. Datasource Specifies the datasource per year for 1750-2015 0 - Ocean/No fire emissions 1 - Based on FIRE-MIP model output constrained by charcoal records, scaled to Global Fire Emissions Database (GFED) version 4s 2 - Based on FIRE-MIP model output, scaled to Global Fire Emissions Database (GFED) version 4s 3 - Global Fire Emissions Database (GFED) version 4s gridcellarea area of the 0.25° x 0.25° grid cells in m2