Format of emission files
If you are creating new emissions files, please copy the format of existing emissions files to be sure they are used properly by the model. Some key features:
- Emissions files require the 'date' variable, with 'time' dimension (and 'datesec' if you have sub-daily emissions); the model does not use the 'time' variable, but you can include it.
- All 3D (time,lat,lon) variables in the file will be read. If you have a 'total' or 'sum' in addition to individual sectors, all variables will be read and you will have twice the emissions you expected!
- In 'vertical' emissions, you may include whatever vertical structure you want (1 km, 0.25 km, regular or irregular grid), but both 'altitude' and 'altitude_int' variables must be included.
- The MAM (modal aerosol model) number emissions in the emissions files are in the units of '(particles/cm2/s)(molecules/mole)(g/kg)'. This is because when emissions are read in CAM they are scaled by Avogadro's number and (1kg/1000g), which is needed for most emissions that are read as (molecules/cm2/s). More information available at: Aerosols section of this wiki.
Combined emission files
Preprepared emission files with all or some of the required source sectors.
| Inventory name and reference | Source sectors available | Coverage | Base resolution | CAM-chem resolution | Version | Dates available, temporal resolution |
|---|---|---|---|---|---|---|
HTAPV2 | 1. Anthro, Ocean, BB 2. Anthro, Ocean | global | 0.1o x 0.1o | 0.5o x 0.5o 0.9o x 1.25o 1.9o x 2.5o | v2.2 | 2008, 2010 |
Separated emission files
This table lists emissions inventories for anthropogenic and biogenic inventories. Starting with CAM5, multiple emissions files for each species can be read (specified in the namelist). Care must be taken not to forget or double-up on any sources when modifying the emissions list in user_nl_cam.
Anthropogenic
| Inventory name and reference | Coverage | Base resolution | CAM-chem resolution | Version | Dates available, temporal resolution | location of files on Cheyenne |
|---|---|---|---|---|---|---|
Coupled Model Intercomparison Project Phase 6 (CMIP6): developed with the Community Emissions Data System (CEDS) | global | 0.5o x 0.5o | 0.9ox1.25o (f09) | v2017-05-18 | 1750-2014, monthly | /glade/p/cesmdata/cseg/inputdata/atm/cam/chem/emis/ |
| SSPs | global | 0.5o x 0.5o | 0.9ox1.25o (f09) | 2015-2100, monthly for each decade | /glade/p/cesmdata/cseg/inputdata/atm/cam/chem/emis/ | |
| Continental | 0.1o x 0.1o | 0.9o x 1.25o | 2006 and 2013, annual average | |||
| global | 0.1o x 0.1o | 0.9ox1.25o (f09) ne30np4 | 4.2_R1.1 4.2 5.1 | 2008-2020, monthly 2000-2020, monthly 2000-2021, monthly | /glade/p/acom/MUSICA/emissions/cams/ | |
merged with CONFORM v2 daily lockdown adjustments for 2020. | global | 0.1o x 0.1o | 0.9ox1.25o (f09) | 5.1 | monthly: 2000-2020 daily: 2020 with lockdown. | /glade/p/acom/MUSICA/emissions/cams/CAMS-GLOB-ANTv5.1_with_2020lockdown |
Spreadsheet with more comprehensive information and availability instructions.
Biomass Burning
| Inventory name and reference | Coverage | Base resolution | CAM-chem resolution | Version | Dates available, temporal resolution | location of files on the NCAR HPC filesystem (glade) |
|---|---|---|---|---|---|---|
Fire INventory from NCAR (FINN) v1.5 (obsolete) | global | Based off of MODIS resolution: 1km | 0.9o x 1.25o (f09) ne30 | 1.5 | 2002-2019, daily | /glade/p/acom/MUSICA/emissions/finn1.5/ |
FINNv2.5: MODIS or MODIS+VIIRS | global | 1 km | 0.9o x 1.25o (f09) ne0CONUSne30x8 | 2.5 | 2002-2021 | /glade/campaign/acom/acom-weather/MUSICA/emissions/finn2.5/f09/ ./ne0CONUSne30x8/ (only a few years) |
FINNv2.5: MODIS or MODIS+VIIRS | global | 0.1o x 0.1o | 2.5 | 2002-2021 | /glade/campaign/acom/acom-weather/emmons/emissions_finn/finn2.5_grid_0.1x0.1 (for regridding to other resolutions) | |
Coupled Model Intercomparison Project Phase 6 (CMIP6) - merge of satellite datasets (GFED4s) with proxies | global | GFED: 0.5o x 0.5o Data access: https://doi.org/10.22033/ESGF/input4MIPs.1117 | 0.9o x 1.25o | 1.2 | 1750-2015, monthly | /glade/p/cesm/chwg_dev/emmons/CMIP6_emissions_1750_2015_FINAL/ |
Quick Fire Emissions Dataset (QFED) | global | 0.25o x 0.25o | 0.9o x 1.25o | 2.5 | 2014-2019, daily | *only CO available for CAM-chem |
Composite QFEDv2.5/FINN1 | global | 0.25o x 0.25o | 0.9o x 1.25o 0.1o x 0.1o ne30np4 ne0CONUSne30x8 | 2.5/1.6 | Mar. 2000- Jan 2023, daily Various | /glade/campaign/acom/acom-weather/MUSICA/emissions/qfed2.6_finn/ → sub-folders have different resolutions available |
Composite QFEDv2.6/FINN1
| global | 0.25o x 0.25o | 0.9o x 1.25o | 2.6/1.6 | Jan 1, 2002- Dec 31, 2023, daily | /glade/campaign/acom/acom-weather/MUSICA/emissions/qfed2.6_finn/f09/ |
Global Fire Assimilation System (GFAS) Contains modified Copernicus Atmosphere Monitoring Service Information 2018 | global | 0.1o x 0.1o | 0.9o x 1.25o | 1.2 | 2014-2017, daily | *only CO available for CAM-chem |
Global Fire Emission Dataset (GFED) | global | 0.25o x 0.25o | 0.9o x 1.25o | 4s | 2016-2020, daily 2010-2020, monthly | /glade/campaign/acom/acom-weather/MUSICA/emissions/gfed/ |
1Composite inventories were created by multiplying CO2 from the base inventory (QFED) by the FINN emission ratios.
Spreadsheet with more comprehensive information and availability instructions.
FINN Emissions
FINNv2.5 emissions are available as text files with emissions for each fire, and as gridded 0.1x0.1 degree files from the NCAR Research Data Archive (RDA). See the FINN webpage for more information.
To grid the text emissions files, use the 'fire_emis' gridding program available from: https://www.acom.ucar.edu/Data/fire/
You can use this program on casper, with a script such as /glade/u/home/emmons/EMISSIONS/FINN/script_run_grid_f09.pbs
Related Information
Emission section of the User's Guide.
Change the CAM-chem default input emission files: see how to implement namelist changes.