README -- Describes contents of HEMCO/CO2/v2014-09/BBIO
23 Feb 2015
GEOS-Chem Support Team
geos-chem-support@g.harvard.edu


Overview:
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This directory contains balanced biosphere data archived from the CASA model,
which is needed by the GEOS-Chem CO2 simulation.  

The original data files were stored in these directory paths

 GEOS_2x2.5/CO2_200508/BBIO_DAILYAVG/CO2.daily.geos.2x25.*
 GEOS_2x2.5/CO2_200508/BBIO_DIURNAL/nep.geos.2x25.*

Christoph Keller converted these data to COARDS-compliant netCDF files
for compatibility with HEMCO.
 

Files:
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BBIO_daily_CO2.nc

 -- Balanced biosphere daily average, from the CASA model

    Resolution  : GEOS-Chem 2 x 2.5 grid (144 x 91 boxes)
    Units       : kg m-2 s-1
    Timestamps  : Daily, 2000/01/01 thru 2000/12/31


BBIO_diurnal_CO2.nc

 -- Daily jnet ecosystem production (NEP) fluxes with a diurnal cycle 
    imposed.  These are archived from the CASA model.

    Resolution  : GEOS-Chem 2 x 2.5 grid (144 x 91 boxes)
    Units       : kg m-2 s-1
    Timestamps  : Every 3 hours from 1985/01/01 thru 1985/12/31


References:
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Daily averaged data:

  Data Source: CASA gridded (1x1) dataset for from M. Thompson
  Monthly values interpolated to daily values : 365 daily files 
  NB : These files DO NOT have the diurnal cycle in daily emissions

Data with diurnal cycle imposed:

  Olsen, S. C., and J. T. Randerson, "Differences between surface and  
    column atmospheric CO2 and implications for carbon cycle research", 
    __J. Geophys. Res.__, 109, D02301, doi:10.1029/2003JD003968, 2004.

  Potter, C. S., J. T. Randerson, C. B. Field, P. A. Matson, P. M. Vitousek, 
    H. A. Mooney, and S. A. Klooster, "Terrestrial ecosystem production: 
    A process model based on global satellite and surface data", 
    __Global Biogeochem. Cycles__, 7, 811841, 1993.