README -- Describes contents of HEMCO/GFED4/v2015-10 directory
28 Jun 2018
GEOS-Chem Support Team
geos-chem-support@g.harvard.edu


Overview:
===============================================================================

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#####  THIS FOLDER CONTAINS THE OFFICIALLY RELEASED GFED4 DATA.  #####
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This data directory contains the GFED4 dry matter fluxes.  These are used
by the HEMCO extension hcox_gfed_mod.F90 to compute biomass burning emissions.

The data files (in COARDS-compliant netCDF format) were prepared by Prasad 
Kasibhatla (psk9@duke.edu) and Christoph Keller (ckeller@seas.harvard.edu)

NOTE: We now have GFED 4.1 dry matter data from 1997 thru 2016.
  -- Bob Yantosca (28 Jun 2018)


Files:
===============================================================================

YYYY/GFED4_gen.025x025.YYYYMM.nc

 -- Monthly emissions of dry matter (i.e. carbon) for years 1997-2014,
    for the following biome types:

    (1) DM_TOTAL : Total dry matter
    (2) DM_TEMP  : Dry matter from temperate forests
    (3) DM_PEAT  : Dry matter from peat
    (4) DM_SAVA  : Dry matter from savanna
    (5) DM_DEFO  : Dry matter from deforestation
    (6) DM_BORF  : Dry matter from boreal forest
    (7) DM_AGRI  : Dry matter from agricultural waste

    For all files:
    Resolution  : GENERIC 0.25 x 0.25 grid (1440 x 720 boxes)
    Units       : kg/m2/s
    Timestamps  : Monthly, 1997/01 thru 2016/12
    Compression : Level 1 (e.g. nccopy -d1)
    Chunking    : nccopy -c lon/1449,lat/720,time/1

YYYY/GFED4_dailyfrac_gen_025x025.YYYYMM.nc

  -- Daily fire emission fractions for years 2003-2014

    For all files:
    Resolution  : GENERIC 0.25 x 0.25 grid (1440 x 720 boxes)
    Units       : unitless
    Timestamps  : Monthly, 2003/01 thru 2014/12
    Compression : Level 1 (e.g. nccopy -d1)
    Chunking    : nccopy -c lon/1449,lat/720,time/1
    

YYYY/GFED4_3hrfrac_gen_025x025.YYYYMM.nc

  -- 3-hourly fire emission fractions for years 2003-2014

    For all files:
    Resolution  : GENERIC 0.25 x 0.25 grid (1440 x 720 boxes)
    Units       : unitless
    Timestamps  : Monthly, 2003/01 thru 2016/12
    Compression : Level 1 (e.g. nccopy -d1)
    Chunking    : nccopy -c lon/1449,lat/720,time/1

References:
===============================================================================

GFED website: http://www.globalfiredata.org 

Akagi, S. K.,  R. J. Yokelson, C. Wiedinmyer, M. J. Alvarado, J. S. Reid, 
  T. Karl, J. D. Crounse, and P. O. Wennberg, "Emission factors for open 
  and domestic biomass burning for use in atmospheric models", 
  __Atmos. Chem. Phys.__, 11, 4039-4072, 2011.
  http://onlinelibrary.wiley.com/doi/10.1002/jgrg.20042/abstract

Andreae, M. O., P. Merlet, "Emission of trace gases and aerosols from biomass 
  burning", __Glob. Biogeochem. Cycles__, Volume 15, Issue 4, pages 955966, 
  December 2001.
  http://onlinelibrary.wiley.com/doi/10.1029/2000GB001382/abstract

Giglio, L., J. T. Randerson, and G. R. van der Werf, "Analysis of daily, 
  monthly, and annual burned area using the fourth-generation global fire 
  emissions database (GFED4)", __J. Geophys. Res, Biogeosciences.__, Vol. 118,
  Issue 1, 317-328, March 2013.
  http://onlinelibrary.wiley.com/doi/10.1002/jgrg.20042/abstract

Randerson, J. T., Y. Chen1, G. R. van der Werf, B. M. Rogers, and D. C. Morton,
  "Global burned area and biomass burning emissions from small fires", 
  __J. Geophys. Res, Biogeosciences__, Volume 117, Issue G4, December 2012.
  http://onlinelibrary.wiley.com/doi/10.1029/2012JG002128/abstract

van der Werf, G. R, J. T. Randerson, L. Giglio, G. J. Collatz, M. Mu, P. S. 
  Kasibhatla, D. C. Morton, R. S. DeFries, Y. Jin, and T. T. van Leeuwen,
  "Global fire emissions and the contribution of deforestation, savanna, 
   forest, agricultural, and peat fires (1997-2009)", __Atmos. Chem. Phys.__, 
   Vol. 10, 11707-11735, 2010.
   http://www.atmos-chem-phys.net/10/11707/2010/acp-10-11707-2010.html