READE -- Describes contents of GFED3_201203
13 March 2012
GEOS-Chem Support Team
geos-chem-support@g.harvard.edu


Files and Directories:
===============================================================================

YYYY/3hourly/GFED3_FR_3HR_YYYYMMDDHH -- 3-hourly fire emission fractions on the
                                        native GFED3 0.5x0.5 grid.

                                        3-hourly factors are available for
                                        2003 thru 2010
                                        

YYYY/Daily/GFED3_FR_DAY_YYYYMMDD     -- Daily fire emission fractions on the
                                        native GFED3 0.5x0.5 grid.

                                        Daily factors are available for
                                        2003 thru 2010

YYYY/Monthly/GFED3_DM_AGW_YYYYMM     -- Files containing GFED3 monthly dry
             GFED3_DM_DEF_YYYYMM        matter (DM) emissions on the native
             GFED3_DM_FOR_YYYYMM        GFED3 0.5x0.5 grid. Units are g/m2.
             GFED3_DM_PET_YYYYMM
             GFED3_DM_SAV_YYYYMM        Monthly emissions are available for
             GFED3_DM_TOT_YYYYMM        1997 thru 2010
             GFED3_DM_WDL_YYYYMM


GFED3_emission_factors.txt           -- Text file containing the GFED3 emission
			                factors for each species as a function
			                of vegetation type.  Includes emission
		                        factors for gas-phase species (NOx, CO,
                                        ALK4, ACET, MEK, ALD2, PRPE, C3H8,
                                        CH2O, C2H6), aerosol species (SO2, NH3,
                                        BC, OC), CO2, and CH4.

 
GFED3_humtropmap                     -- GFED3 humid tropical forest map (bpch
                                        format). This is used to assign
                                        emission factors for 'deforestation.'
                                        'Deforestation' occur outside of humid
                                        tropical forest is assigned a
                                        'woodlands' emission factor. Values
                                        are:

                                          1 = humid tropical forest
                                          0 = other


NOTE: GEOS-Chem reads monthly emissions of DM are read from disk,
 multiplies by daily and 3hourly fractions (if necessary), and then
 multiplies by the appropriate emission factors to produce biomass
 burning emissions on the GFED3 0.5x0.5 degree grid  The emissions are 
 then regridded to the current GEOS-Chem or GCAP grid (1x1, 2x25, or 4x5)
 by adapting the MAP_A2A regriddng package


References:
===============================================================================
 (1 ) Original GFED3 database from Guido van der Werf 
        http://www.falw.vu/~gwerf/GFED/GFED3/emissions/
 (2 ) Giglio, L., Randerson, J. T., van der Werf, G. R., Kasibhatla, P. S.,
      Collatz, G. J., Morton, D. C., and DeFries, R. S.: Assessing
      variability and long-term trends in burned area by merging multiple 
      satellite fire products, Biogeosciences, 7, 1171-1186, 
      doi:10.5194/bg-7-1171-2010, 2010.
 (3 ) 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), Atm. Chem. Phys., Vol
      10, 1170711735, 2010.
 (4 ) Mu, M., J.T. Randerson, G.R. van der Werf, L. Giglio, P. Kasibhatla, D.
      Morton, G.J. Collatz, R.S. DeFries, E.J. Hyer, E.M. Prins, D.W.T.
      Griffith, D. Wunch, G.C. Toon, V. Sherlock, and P.O. Wennberg,
      Daily and 3-hourly variability in global fire emissions and consequences
      for atmospheric model predictions of carbon monoxide, Journal of
      Geophysical Research-Atmospheres, 116: D24303, doi:10.1029/2011JD016245,
      2011.