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V0006 » README.accmip_interpolated.txt

Colombe Siegenthaler-Le Drian, 06/11/2019 10:51 AM

 
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??# =======================================================================================================
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#      README related to files contained in 
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#      ftp://ftp-ipcc.fz-juelich.de/pub/emissions/gridded_netcdf/accmip_interpolated
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#      last edited on 20141030 by Angelika Heil, Research Center Juelich, IEK8, a.heil@fz-juelich.de
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#
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#      Please acknowledge this ftp-site in all communications and publications when using the interpolated
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#      ACCMIP and RCP emission dataset. Please report errors to Angelika Heil (a.heil@fz-juelich.de) or 
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#      Martin Schultz (m.schultz@fz-juelich.de).
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# =======================================================================================================
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# ==================================================================#
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  1)       Interpolated ACCMIP and RCP Emissions: Introduction
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# ==================================================================#
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This folder contains the interpolated ACCMIP and RCP emission dataset contains monthly mean global 
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emissions from 10 anthropogenic sectors and 2 biomass burning categories for the period 1850 to 2100. 
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For the period 1850 to 2000, it is created from linear time interpolation of the decadal monthly mean 
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historical ACCMIP (Atmospheric Chemistry and Climate Model Intercomparison Project) emissions. The 
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historical ACCMIP dataset described in Lamarque et al. (2010) provides 0.5 degree horizontally gridded 
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decadal monthly mean emissions for the years 1850 to 2000 as a best guess historical emission estimate 
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constructed from a harmonised combination of existing regional and global inventories.
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For the period 2000 to 2100, this dataset is created from linear time interpolation of the future 
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emission projections related to four different Representative Concentrations Pathways (RCPs), RCP2.6, 
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RCP4.5 RCP6 and RCP8.5, described in the overview paper of van Vuuren et al. (2011). The numbers denote 
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the radiative forcing target levels for the year 2100 of 2.6, 4.5, 6 and 8.5 W/m2, respectively, based 
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on the forcing of greenhouse gases and other forcing agents. For more details, please also refer to 
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RCP database at http://www.iiasa.ac.at/web-apps/tnt/RcpDb. The year 2000 historic ACCMIP emissions 
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acted as a starting point (handshake year) for the development of these RCP emission scenarios. 
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The RCP emission files are given for each decade until 2100, starting in the year 2000, with extra files 
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for the year 2005.
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The decadal ACCMIP and RCP files are accessible from RCP database (Version 2.0) at 
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http://www.iiasa.ac.at/web-apps/tnt/RcpDb. The database contains an identical copy of the latest version 
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of the decadal files stored at ftp://ftp-ipcc.fz-juelich.de/pub/emissions/gridded_netcdf/decadal, see 
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also ftp://ftp-ipcc.fz-juelich.de/pub/emissions/gridded_netcdf/release_history_gridded_netcdf.txt.
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In the historical decadal ACCMIP emission files, the anthropogenic and aircraft emissions represent the 
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first year of the decade, while ship emissions represent the 5th year of the decade. The biomass burning 
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emissions represent average conditions of the respective decade (e.g. 1980-1989 mean values are contained 
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in the year 1980 file) except for the 2000 estimate which is calculated from the 1997-2006 average. 
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The RCP scenario emissions are representative for the first year of the decade, except for the year 2005 
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RCP emissions (which are representative for the year 2005). The historic ACCMIP emissions and the RCP 
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projections provide a seasonality only for the biomass burning and ship emissions.
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In order to create monthly files for each year, linear time interpolation between the decades was 
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performed for each sector taking into account the respective timestamp of the decadal ACCMIP and RCP 
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emissions. In more detail, the decadal historic anthropogenic emissions and all RCP emissions were 
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assigned to the first year of each decade while historic ship and biomass burning emissions were 
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assigned to the 5th year of each decade. Emissions of the year 2000 are an exact copy of the year 2000 
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emissions contained in the historic decadal ACCMIP emissions dataset. The emissions of the year 2001, 
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for example, were calculated from linear time interpolation between the decadal year 2000 historic ACCMIP 
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emissions and the year 2005 RCP emissions.
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On a yearly global average, the interpolated anthropogenic ACCMIP and RCP8.5 emissions of the years 
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1980 to 2010 contained in this database are practically identical with the ACCMIP MACCity anthropogenic 
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emissions described in Granier et al. (2011) (available at ECCAD GEIA database (http://eccad.sedoo.fr), 
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see also http://accent.aero.jussieu.fr/MACC_metadata.php), which used a similar linear interpolation 
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procedure. In contrast to this dataset, which has no seasonality for the anthropogenic emissions, the 
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source-specific seasonality developed for the RETRO project (http://retro.enes.org/) was applied to each 
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sector in the ACCMIP MACCity anthropogenic emissions. Both dataset differ by less than 0.1% in respect 
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to their yearly global anthropogenic totals. The sector-wise relative difference in the yearly global 
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totals is less than 0.3% except for ship emissions. Due to a different timestamp assigned to the historic 
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ship emissions during the interpolation procedure, the relative difference reaches 20% in some years. 
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Summary statistics of annual global total emissions per sector are available at 
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ftp://ftp-ipcc.fz-juelich.de/pub/emissions/summary_statistics/.
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The interpolated anthropogenic ACCMIP and RCP8.5 emissions for the years 1850 and 1960 to 2010 contained 
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in this database are identical with the AEROCOM-II ACCMIP hindcast emission source files available at 
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http://aerocom.met.no/download/emissions/AEROCOM-II-ACCMIP/ (see also Diehl et al. (2012)). 
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The AEROCOM-II ACCMIP source files comprise emissions for the species CO, CH4, NH3, SO2, BC, OC and NOx. 
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AEROCOM-II ACCMIP hindcast emission source files for biomass burning emissions consist of ACCMIP MACCity 
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biomass burning emission data for the period 1960 to 2008 (see below) and interpolated RCP8.5 biomass 
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burning emissions from this dataset for the years 2009 and 2010.
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One key characteristic of biomass burning emissions is their strong interannual variability, which is not 
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captured in this interpolated biomass burning emission dataset. If an explicit interannual variability of 
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biomass burning emissions is of interest for a study, we recommend using the ACCMIP MACCity biomass 
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burning emission data, available at 
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ftp://ftp-ipcc.fz-juelich.de/pub/emissions/gridded_netcdf/accmip_maccity_biomassburning. 
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The ACCMIP MACCity biomass burning emission data, which are available for the period 1960 to 2008, are the 
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original data used to construct the decadal monthly mean ACCMIP biomass burning emissions, see also 
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README.accmip_maccity_biomassburning.txt in the same directory.
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All anthropogenic emission sectors are stored in the anthropogenic file, except for ship and aircraft 
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emissions, which are kept in individual files. The two biomass burning sectors are kept in a separate 
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biomass burning file.
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# ==================================================================#
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  2)       Interpolated ACCMIP and RCP Emissions: Species 
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# ==================================================================#
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The original ACCMIP inventory described in Lamarque et al. (2010) comprises emissions for the following species 
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and lumped groups, in the following denoted as  "ACCMIP standard species" (Table 1 and 2).
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# -----------------------------------------------------------------------------------------------------  
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No Species     Species     							Molecular weight
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  (short_name) (CF standard_name) 		     				(g mol-1) 
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# -----------------------------------------------------------------------------------------------------  
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1   CO         carbon_monoxide     						28.01 
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2   CH4        methane     							16.04 
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3   NH3        ammonia     							17.03 
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4   NO*        nitrogen_monoxide     						30.01 
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5   NO2*       nitrogen_dioxide      						46.01 
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6   SO2        sulfur_dioxide      						64.06 
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7   BC         black_carbon_dry_aerosol		      				12.01 
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8   OC         particulate_organic_matter_dry_aerosol_expressed_as_carbon 	12.01 
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9   NMVOC      nmvoc     							49.41(B),72.8(A),70(S)**
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10  NOx*       nox_expressed_as_nitrogen_monoxide				30.01 
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 *  =  Treatment of NO, NO2 and NOx biomass buring emissions in this database =
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    Please note that in the historic decadal ACCMIP biomass burning emission data (covering the period 1850 
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    to 2000), emissions of NO (as NO) and NO2 (as NO2) are given as emissions of the individual compounds. 
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    This database was extended by historic ACCMIP biomass burning emissions of NOx (NO+NO2 as NO), created 
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    from summing up the emissions of both compounds accordingly. 
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    In the original decadal RCP biomass burning emission dataset, only NOx emissions are provided. These 
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    NOx emissions are given in the NO biomass burning emission files. In order to allow for consistency 
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    with the historic ACCMIP biomass burning emissions, the NO biomass burning files contained in the 
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    original decadal RCP emission dataset are renamed into NOx emissions in this database. Furthermore, 
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    the RCP NOx biomass burning emissions were split up into individual NO and NO2 emission files using 
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    a molar NO/NOx (NO2/NOx) ratio of 0.837 (0.163) which is the fire-averaged value measured by Yokelson 
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    et al.(1996) in a combustion chamber using various fuel types in order to create individual NO and 
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    NO2 emission files.
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    =  Treatment of NO, NO2 and NOx anthropogenic emissions (incl. air and ship) in this database =
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    In the original decadal ACCMIP and RCP emission dataset, the NO anthropogenic, ship and aircraft 
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    emission files correspond to the total NOx (NO and NO2, represented as NO) emissions. In order to 
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    allow for consistency with the biomass burning emissions, the NO files contained in the original 
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    decadal ACCMIP and RCP emission dataset are renamed into NOx emissions in this database.    
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    In the original decadal ACCMIP aircraft, emissions are provided for both NO and NO2. Since both files 
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    provide the same NOx emissions (as NO and NO2, respectively), the NO2 aircraft emissions are omitted
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    here. 
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 ** Please note that the molecular weights specified for the lumped groups of organic species differ 
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    for biomass burning (B), anthropogenic (A) and ship (S) emissions. 
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    The mean molecular weights of the lumped groups in the biomass burning emissions were calculated from the 
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    molecular weights of the individual components weighted by their relative contribution to the groups' total 
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    biomass burning emissions during the the period 1900 to 2000, see also Table 3.
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Table 1: List of ACCMIP standard species excluding the 25 GEIA VOC species (Table 2). 
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# -----------------------------------------------------------------------------------------------------  
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No 	Species     		Species     				Molecular weight
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  	(short_name)		(CF standard_name) 		     	(g mol-1) 
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# -----------------------------------------------------------------------------------------------------  
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1	alcohols      			alcohols      			37.3(B), 46.2(A)          *
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2	ethane      			ethane      			30.07           (B,A,S) 
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3	propane     			propane     			44.1            (B,A,S)  
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4	butanes     			butane      			58.12           (B,A,S) 
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5	pentanes      			pentane     			72.15           (B,A,S)
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6	hexanes-and-higher-alkanes  	not_available     		88.64(B),106.8(A,S)       *
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7	ethene      			ethene      			28.05            (B,A,S) 
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8	propene     			propene     			42.08            (B,A,S)
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9	ethyne      			ethyne      			26.04            (B,A,S)
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10  	isoprene      			isoprene      			68.12            (B)
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11 	terpenes      			terpenes      			136.24           (B) 
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12  	other-alkenes-and-alkynes 	not_available     		61.91(B), 67.0(A,S)       *
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13 	benzene     			benzene     			78.11            (B,A,S) 
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14  	toluene     			toluene     			92.14            (B,A,S)
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15	xylene      			xylene      			106.17           (B,A,S)
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16  	other-aromatics     		not_available     		106.17(B), 126.8(A,S)     *
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17  	ethers      			ethers      			72.11(B), 81.5(A)         *
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18  	chlorinated-HC      		chlorinated_hydrocarbons      	50.49(B), 138.8(A)        *
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19  	formaldehyde      		formaldehyde   			30.03             (B,A) 
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20  	other-alkanals      		not_available     		44.05(B), 68.8(A)         *
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21  	ketones     			ketones     			68.59(B), 75.3(A)         * 
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22  	acids     			organic_acids     		57.28(B), 59.1(A)         *
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23  	other-VOC     			not_available     		68.08(B), 68.9(A,S)       *
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24 	trimethyl-benzenes      	trimethylbenzene      		120               (A,S) 
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25 	esters      			esters      			104.7             (A)
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*  The molecular weights for the lumped groups of organic species differ for the biomass burning (B), 
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   anthropogenic (A) and ship (S) emissions. The label (B,A,S) denotes that biomass burning, anthropogenic
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   and ship emission files are available for a given species. 
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   No aircraft emissions are available for any VOC species.
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   For details on the species included into lumped biomass burning emissions, please refer to Table 3 in 
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   ftp://ftp-ipcc.fz-juelich.de/pub/accmip/gridded_netcdf/accmip_maccity_biomassburning/README.accmip_maccity_biomassburning.txt.
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Table 2: The ACCMIP 25 GEIA VOC species and their molecular weights 
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In addition to the ACCMIP standard species, emission files are created for a selected 
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number of supplementary species which are listed in Table 3.
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# -----------------------------------------------------------------------------------------------------  
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No   Species     			Species     				Molecular weight
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     (short_name) 			(CF standard_name) 		     	(g mol-1) 
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# -----------------------------------------------------------------------------------------------------  
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1    H2*				molecular_hydrogen                   	2.02
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2    C2H6S    				dimethyl_sulfide			62.14
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3    HCN      				hydrogen_cyanide			27.02
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4    CH3CN				not_available {acetonitrile}		41.05
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5    CH3OH				methanol				32.04
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6    C2H5OH				ethanol					46.07
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7    C6H5OH				not_available {phenol}			94.11
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8    C3H6O				not_available {acetone}			58.08
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9    C4H8O				not_available {methyl-ethyl-ketone}	72.11
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10   non-methanol-non-phenol-alcohols	not_available {lumped alcohols 		89.22(B)	
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                                        (Tab. 2 #1) excluding methanol and phenol} 	
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11   non-acetone-ketones		not_available {lumped ketones 		102.25(B)
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                                        (Tab. 2 #21) excluding acetone} 
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12   butanes-and-higher-alkanes*	not_available {lumped butanes,		80.36(B), 83.13(A), 80.77(S)
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                                        pentanes and hexanes-and-higher-alkanes 
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                                        (Tab. 2 #4, #5, #6)}
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13   xylene-and-other-aromatics*	not_available {lumped xylene, 		106.17(B), 117.0(A), 119.88(S)
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                                        other_aromatics and trimethyl-benzenes
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                                        (Tab. 2 #15, #16, #24)}	
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Table 3: List of additional species and their molecular weights. Emissions of additional species from 
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biomass burning are calculated from the gridded CO emission data by applying spatially varying 
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species-to-CO mass emission ratios. The calculation uses the same spatial information on surface fuel and peat 
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burning as used in the compilation of the ACCMIP (Lamarque et al. (2010) or MACCity biomass burning emission inventory. 
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It also uses consistent emission factors. 
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* Emissions are also calculated for anthropogenic sectors. Anthropogenic emissions of H2 were derived using a 
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  scaling approach. For more information, please read the metadata information contained in each file. 
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  Anthropogenic emissions of butanes-and-higher-alkanes and xylene-and-other-aromatics are calculated 
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  by summing up the emissions of selected GEIA VOC species.
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# ==================================================================#
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  3)        Interpolated ACCMIP and RCP Emissions: Sectors
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# ==================================================================#
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The interpolated ACCMIP and RCP Emissions consist of in total 12 emission sectors (Table 4).
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All anthropogenic sectors (Code 1 to 10) are stored in the anthropogenic emission file, except for
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ship (Code 9) and aircraft (Code 10) emissions, which are saved in individual files. 
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The two biomass burning categories (Code 9 and 10) are stored in the biomass burning emission files. 
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# -----------------------------------------------------------------------------------------------------  
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Sector  Sector     	CF standard name				IPCC source categories**
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Code	(short_name)	for sector*
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# -----------------------------------------------------------------------------------------------------  
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1	ene		energy_production_and_distribution		1A1, 1B
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2	ind		industrial_processes_and_combustion		1A2, 2A, 2B, 2C, 2D, 2G
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3	tra		land_transport					1A3b, 1A3c, 1A3e
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4	dom		residential_and_commercial_combustion		1A4a, 1A4b, 1A4c
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5	slv		solvent_production_and_use			2F, 3
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6	agr		agricultural_production				4A, 4B, 4C, 4D, 4G
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7	awb		agricultural_waste_burning			4F
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8	wst		waste_treatment_and_disposal			6
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9	shp		maritime_transport				1A3d
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10	air		aviation					1A3a
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11	for		forest_fires					5
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12	gra		savanna_and_grassland_fires			5
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* general syntax of the CF standard name: 
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  tendency_of_atmosphere_mass_content_of_<standard_name species>_due_to_emission_from_<standard_name process>
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**  Source categories as defined in the 2006 IPCC (Intergovernmental Panel on Climate Change) Guidelines for 
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National Greenhouse Gas Inventories; http://www.ipcc-nggip.iges.or.jp/public/2006gl/index.html.
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Table 4: ACCMIP and RCP Emission Sectors
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Please note that the number of sector variables contained in the anthropogenic files depends on the 
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species (see Tables 5 to 7). In the original decadal ACCMIP and RCP emission dataset, a sector variable for 
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a given species is missing either because emissions from this sector are considered to be neglectably 
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small or because of the inavailability of sectorised emission information when the inventory was 
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established. In the original anthropogenic ACCMIP and RCP emission files, the aspect of missing or "zero" 
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emissions is not treated homogenously. For example, in the original decadal anthropogenic BC emission files, 
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the sectors variables "slv" and "agr" are missing in all historic ACCMIP emission files. They are contained in
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the RCP emission files, but all BC emissions of the "slv" and "agr" sector variables are zero. Another 
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example are CO emissions of the sector variable "ene". Here, the sector variable ene is contained in all files
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except for 1850.  
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To facilitate the handling of the emission files contained in this database, the number of sector 
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variables in the anthropogenic files is kept constant for a given species throughout 1850 to 2100.
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These sector variables are listed in Tables 5 to 7. 
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Sector variables having either missing and/or all-zero values throughout 1850 to 2100 are omitted 
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(e.g. sector variables "slv" and "agr" from the original decadal anthropogenic BC emission files are omitted).
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Sector variables are added to the original files as a field of zeros whenever they are missing 
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only in individual decades. 
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# -----------------------------------------------------------------------------------------------------  
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No Species                        Sector variables contained 
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  (short_name)      anthropogenic 		    biomass burning   ship     aircraft
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# -----------------------------------------------------------------------------------------------------  
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1   CO		'ene ind tra dom slv agr awb wst'	'for gra'	'shp'	'N.A.'
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2   CH4		'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
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3   NH3*	'ene ind tra dom agr awb'		'for gra'	'N.A.'	'N.A.'
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4   NO		'N.A.'					'for gra'	'N.A.'	'N.A.'
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5   NO2		'N.A.'					'for gra'	'N.A.'  'N.A.'
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6   SO2		'ene ind tra dom awb wst'		'for gra'	'shp'	'N.A.'
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7   BC		'ene ind tra dom awb wst'		'for gra'	'shp'	'air'
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8   OC		'ene ind tra dom awb wst'		'for gra'	'shp'	'N.A.'
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9   NMVOC	'ene ind tra dom slv agr awb wst'	'for gra'	'shp'	'N.A.'
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10  NOx**	'ene ind tra dom agr awb wst'		'for gra'	'shp'	'air'
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*   All agricultural NH3 emissions are subject to an error and should therefore be used with reservation. 
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    The error is already contained in original decadal ACCMIP and RCP emission files, see also 
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    ftp://ftp-ipcc.fz-juelich.de/pub/accmip/gridded_netcdf/release_history_gridded_netcdf.txt.  
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    Following our requests for a corrected version of all agricultural NH3 emissions, we so far obtained 
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    only corrected RCP emissions (years 2005 to 2100). The correction of the historic 
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    agricultural NH3 emission data is still pending (as of November 2014). 
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    In order to avoid discontinuities in the time series (i.e. when combining the uncorrected historic with
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    the corrected RCP emissions), we decided to stick to the uncorrected agricultural NH3. These are provided
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    as the standard product provided on this repository. The uncorrected NH3 emissions are also used as input
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    in several modelling studies (e.g. in the various studies described in the ACP special issue on the 
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    The Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP) released in 2013 
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    (http://www.atmos-chem-phys.net/special_issue296.html), and also in the multi-model global study on 
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    nitrogen desposition by Lamarque et al. (2013) (doi:10.5194/acp-13-7997-2013). Despite this error, 
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    the uncorrected emissions are currently the only citable reference data product. 
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    The differences between the corrected and uncorrected agricultural NH3 emissions, taking the RCP26 2010 data
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    as an example, are illustrated in 
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    ftp://ftp-ipcc.fz-juelich.de/pub/accmip/ancillary_data/ACCMIP_corrected_vs_uncorrected_emiss_agr_NH3_RCP26_2010.pdf. 
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    The corrected agricultural RCP NH3 emissions are available at http://acd.ucar.edu/~lamar/IPCC_AR5/NH3_corrected.tar.
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    In case of any question with respect to the corrected or uncorrected NH3 agricultural historic or 
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    RCP emissions, please directly contact the lead author of the publication describing the historical ACCMIP dataset (see section 1). 
624

625
**  For the treatment of NOx emissions, please also see the annotation * in Table 1.
626

627
N.A. denotes not available. No emission files are available in the Lamarque et al. (2010) inventory. 
628

629
It does not necessarily mean that no emissions are produced in reality.
630

631
 
632

633
Table 5: Sector variables contained in the anthropogenic, biomass burning and ship emission files
634

635
          for the ACCMIP standard species.
636

637
          N.A. denotes that for the given species no data are available for any sector variable.
638

639

640

641
# -----------------------------------------------------------------------------------------------------  
642

643
No Species                      		  Sector variables contained 
644

645
  (short_name)     		 	anthropogenic 		   biomass burning      ship   aircraft
646

647
# -----------------------------------------------------------------------------------------------------  
648

649
1   alcohols			'ene ind dom slv agr awb wst'		'for gra'	'N.A.'	'N.A.'
650

651
2   ethane			'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
652

653
3   propane			'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
654

655
4   butanes			'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
656

657
5   pentanes			'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
658

659
6   hexanes-and-higher-alkanes	'ene ind tra dom slv agr awb wst'	'for gra'	'shp'	'N.A.'
660

661
7   ethene			'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
662

663
8   propene			'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
664

665
9   ethyne			'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
666

667
10  isoprene			'N.A.'					'for gra'	'N.A.'	'N.A.'
668

669
11  terpenes			'N.A.'					'for gra'	'N.A.'	'N.A.'
670

671
12  other-alkenes-and-alkynes	'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
672

673
13  benzene			'ene ind tra dom agr awb wst'		'for gra'	'shp'	'N.A.'
674

675
14  toluene			'ene ind tra dom slv agr awb wst'	'for gra'	'shp'	'N.A.'
676

677
15  xylene			'ene ind tra dom slv agr awb wst'	'for gra'	'shp'	'N.A.'
678

679
16  other-aromatics		'ene ind tra dom slv agr wst'		'for gra'	'shp'	'N.A.'
680

681
17  ethers			'tra dom slv agr wst'			'for gra'	'N.A.'	'N.A.'
682

683
18  chlorinated-HC		'tra slv wst'				'for gra'	'N.A.'	'N.A.'
684

685
19  formaldehyde		'ene ind tra dom agr awb wst'		'for gra'	'N.A.'	'N.A.'
686

687
20  other-alkanals		'ene ind tra dom agr awb wst'		'for gra'	'N.A.'	'N.A.'
688

689
21  ketones			'ene ind tra dom slv agr awb wst'	'for gra'	'N.A.'	'N.A.'
690

691
22  acids			'ene ind dom agr awb wst'		'for gra'	'N.A.'	'N.A.'
692

693
23  other-VOC			'ene ind tra dom slv wst'		'for gra'	'shp'*	'N.A.'
694

695
24  trimethyl-benzenes		'ene ind tra dom wst'			'N.A.'		'shp'	'N.A.'
696

697
25  esters			'tra slv wst'				'N.A.'		'N.A.'	'N.A.'
698

699

700

701
* ship emissions of other-VOC not available for RCP scenarios
702

703

704

705

706

707
Table 6: Sector variables contained in the anthropogenic, biomass burning and ship emission files
708

709
          for the GEIA VOC species.
710

711
          N.A. denotes that for the given species no data are available for any sector variable.
712

713

714

715

716

717
# -----------------------------------------------------------------------------------------------------  
718

719
No  Species                   		Sector variables contained 
720

721
    (short_name)     	 		anthropogenic 		   biomass burning      ship   aircraft
722

723
# -----------------------------------------------------------------------------------------------------  
724

725
1   H2       			     'ene ind tra dom agr awb wst'	'for gra'       'shp'   'N.A.'   
726

727
2   C2H6S			     'N.A.'				'for gra'       'N.A.'  'N.A.'
728

729
3   HCN			  	     'N.A.'                             'for gra'       'N.A.'  'N.A.'
730

731
4   CH3CN			     'N.A.'                             'for gra'       'N.A.'  'N.A.'
732

733
5   CH3OH			     'N.A.'                             'for gra'       'N.A.'  'N.A.'
734

735
6   C2H5OH			     'N.A.'                             'for gra'       'N.A.'  'N.A.'
736

737
7   C6H5OH                           'N.A.'                             'for gra'       'N.A.'  'N.A.'
738

739
8   C3H6O			     'N.A.'                             'for gra'       'N.A.'  'N.A.'
740

741
9   C4H8O			     'N.A.'                             'for gra'       'N.A.'  'N.A.'
742

743
10  non-methanol-non-phenol-alcohols 'N.A.'                             'for gra'       'N.A.'  'N.A.'
744

745
11  non-acetone-ketones	  	     'N.A.'                             'for gra'       'N.A.'  'N.A.'
746

747
12  butanes-and-higher-alkanes       'ene ind tra dom slv agr awb wst'	'for gra'       'shp'   'N.A.'
748

749
13  xylene-and-other-aromatics       'ene ind tra dom slv agr awb wst'  'for gra'       'shp'   'N.A.'
750

751

752

753

754

755
Table 7: Sector variables contained in the anthropogenic, biomass burning and ship emission files
756

757
          for the supplementary species.
758

759
          N.A. denotes that for the given species no data are available for any sector variable.
760

761

762

763

764

765
# ==================================================================#
766

767
  4)        Interpolated ACCMIP and RCP Emissions: Filenames
768

769
# ==================================================================#
770

771

772

773
The filename nomenclature for the gridded interpolated ACCMIP and RCP emission files is as follows
774

775
   accmip_interpolated_emissions_${SCENARIO}_${SPECIES}_${MAINSECTOR}_${YEAR}_${RES}.nc
776

777
      with
778

779
        SCENARIO  = historic, RCP26, RCP45, RCP60, RCP85
780

781
                    (historic covers the years 1850 to 2000 (historic ACCMIP emissions),
782

783
                     the RCP scenarios cover the years 2001 to 2100)
784

785
        MAINSECTOR= anthropogenic (containing the sector variables listed in Tables 5 to 7)
786

787
		    ships
788

789
                    air
790

791
                    biomassburning
792

793
        YEAR      = 1850-2100 (1900-2100 for biomass burning*)
794

795
        RES       = 0.5x0.5, T31, T63
796

797
        SPECIES   = { CO, CH4, NH3, NO, NO2, SO2, BC, OC, NMVOC, NOx, alcohols, ethane, propane, butanes, 
798

799
                    pentanes, hexanes-and-higher-alkanes, ethene, propene, ethyne, isoprene, terpenes, 
800

801
                    other-alkenes-and-alkynes, benzene, toluene, xylene, other-aromatics, ethers, chlorinated-HC, 
802

803
                    formaldehyde, other-alkanals, ketones, acids, other-VOC, trimethyl-benzenes, esters,
804

805
                    NO, NO2, H2, C2H6S } (SPECIES = short_name in Table 1 to 2);
806

807
                    plus supplementary species listed in Table 3.
808

809
    * Note that biomass burning files are not available prior to 1900. In the original decadal ACCMIP dataset, the 
810

811
      1850 biomass burning emissions are a copy of the year 1900 files. Here, we provide interpolated files only
812

813
      from 1900 onwards.  
814

815

816

817
On this repository, all files are gzip-compressed. 
818

819

820

821

822

823
# ==================================================================#
824

825
  5)        CF Compliancy
826

827
# ==================================================================#
828

829

830

831
The data are CF compliant following the CF Conventions (Version 1.5, Standard Name Table v20, 11 September 2012, 
832

833
see also http://cf-pcmdi.llnl.gov/), with the following exceptions:
834

835
 
836

837
  *  Standard names are not available for the following species
838

839
      - hexanes-and-higher-alkanes
840

841
      - other-alkenes-and-alkynes
842

843
      - other-aromatics
844

845
      - other-alkanals
846

847
      - other-VOC
848

849

850

851
   * The standard name for sectorised biomass burning emissions of nitrogen_dioxide (NO2) is not approved yet,
852

853
     although a standard names for the species itself exist. Standard names for all sectoral emissions
854

855
     of molecular_hydrogen, dimethyl_sulfide, hydrogen_cyanide are not yet approved;  
856

857
     a standard names for the species itself exist. 
858

859
   
860

861
   * The standard name for sectorised emissions of nox_expressed_as_nitrogen_monoxide (NOx) is not yet approved.
862

863

864

865

866

867

868

869
# ==================================================================#
870

871
  6)        References
872

873
# ==================================================================#
874

875

876

877
Diehl, T., Heil, A., Chin, M., Pan, X., Streets, D., Schultz, M., and Kinne, S.: Anthropogenic, biomass burning, 
878

879
and volcanic emissions of black carbon, organic carbon, and SO2 from 1980 to 2010 for hindcast model experiments, 
880

881
Atmos. Chem. Phys. Discuss., 12, 24895-24954, doi:10.5194/acpd-12-24895-2012, 2012.
882

883

884

885
Granier, C., Bessagnet, B., Bond, T., D.Angiola, A., van der Gon, H. D., Frost, G. J., Heil, A., Kaiser, J. W., 
886

887
Kinne, S., Klimont, Z., Kloster, S., Lamarque, J.-F., Liousse, C., Masui, T., Meleux, F., Mieville, A., Ohara, T., 
888

889
Raut, J. C., Riahi, K., Schultz, M. G., Smith, S. J., Thompson, A., van Aardenne, J., van der Werf, G. R., 
890

891
and van Vuuren, D. P.: Evolution of anthropogenic and biomass burning emissions of air pollutants at global and 
892

893
regional scales during the 1980-2010 period, Climatic Change, 109, 163-190, doi:10.1007/s10584-011-0154-1, 2011.
894

895

896

897
Lamarque, J.-F., Bond, T. C., Eyring, V., Granier, C., Heil, A., Klimont, Z., Lee, D., Liousse, C., Mieville, A.,
898

899
Owen, B., Schultz, M. G., Shindell, D., Smith, S. J., Stehfest, E., Van Aardenne, J., Cooper, O. R., Kainuma, M.,
900

901
Mahowald, N., McConnell, J. R., Naik, V., Riahi, K., and van Vuuren, D. P.: Historical (1850-2000) gridded 
902

903
anthropogenic and biomass burning emissions of reactive gases and aerosols: methodology and application, Atmos. 
904

905
Chem. Phys., 10, 7017-7039, doi:10.5194/acp-10-7017-2010, 2010.
906

907

908

909
van Vuuren, D. P., Edmonds, J., Kainuma, M., Riahi, K., Thomson, A., Hibbard, K., Hurtt, G. C., Kram, T., Krey, V., 
910

911
Lamarque, J. F., Masui, T., Meinshausen, M., Nakicenovic, N., Smith, S. J., and Rose, S. K.: The representative 
912

913
concentration pathways: an overview (2011). Climatic Change, 109, 5-31, doi:10.1007/s10584-011-0148-z.
914

915

916

917
# ==================================================================#
918

919
  7)        Corrigendum and Changes
920

921
# ==================================================================#
922

923
  20131101: Corrected Table 4 in this README (list of available aircraft files was incorrect).
924

925
  20130114: Corrected Tables 4 and 5 in this README (list of available ship files was incorrect)
926

927
  20130304: Added description for H2 and DMS emissions. Added gridded data of these species to this database.           
928

929
  20130516: Renamed directory name and filename of README-file from ACCMIP_Interpolated into accmip_interpolated.
930

931
            (note: also renamed ACCMIP_MACCity into accmip_maccity_biomassburning)
932

933
  20141030: Added supplementary species, see Table 3. 
934

935

(5-5/10)