README -- describes the contents of bromine_201205 directory
23 Jul 2012
GEOS-Chem Support Team
geos-chem-support@g.harvard.edu

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

Stratospheric Bry is treated as an upper boundary condition above the local
model troposphere. These data are read in strat_chem_mod.F90.

The emissions distributions for CHBr3 and CH2Br2 were created following
Scenario 3 from Warwick et al. (2006). CHBr3 and CH2Br2 emissions from Liang
et al. (2010) are aseasonal, but seasonality is added to the CHBr3 source in the
northern extratropics (>30 N) in bromocarb_mod.F, following Parrella et al.
(2012).


Files in the CCM_stratosphere_Bry/ directory:
===============================================================================

Bry_Stratosphere_day.bpch.geos4.2x25
Bry_Stratosphere_day.bpch.geos5.2x25
Bry_Stratosphere_day.bpch.merra.2x25
  -- Monthly mean daytime concentrations of Bry species in the stratosphere. 
     Stored by Liang et al. (2012) using the GEOS-5 CCM.

Bry_Stratosphere_night.bpch.geos4.2x25
Bry_Stratosphere_night.bpch.geos5.2x25
Bry_Stratosphere_night.bpch.merra.2x25
  -- Monthly mean nighttime concentrations of Bry species in the stratosphere.
     Stored by Liang et al. (2012) using the GEOS-5 CCM.


Files in the VSL_emissions/ directory
===============================================================================

SLBromine_emission.2x25.nc
   -- Emissions of very short lived (VSL) source gases, CHBr3 and CH2Br2, taken
      from Liang et al. (2010).

SLBromine_Emissions_2x2.5.dat
   -- Original ASCII data file provided by Q. Liang containing CHBr3 and CH3Br2
      emissions.

README
   -- Original README provided by Q. Liang describing emissions data.


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

Liang, Q., Stolarski, R. S., Kawa, S. R., Nielsen, J. E., Douglass, A. R.,
Rodriguez, J. M., Blake, D. R., Atlas, E. L., and Ott, L. E.: Finding the
missing stratospheric Bry: a global modeling study of CHBr3 and CH2Br2, Atmos.
Chem. Phys., 10, 2269--2286, 2010.

Parrella, J.P., D.J. Jacob, Q. Liang, Y. Zhang, L.J. Mickley, B. Miller, M.J.
Evans, X. Yang, J.A. Pyle, N. Theys, and M. Van Roozendael, Tropospheric
bromine chemistry: implications for present and pre-industrial ozone and
mercury, submitted to Atmos. Chem. Phys., 2012.

Warwick, N. J., Pyle, J. A., Carver, G. D., Yang, X., Savage, N. H., O'Connor,
F. M., and Cox, R. A., Global modeling of biogenic bromocarbons, J. Geophys.
Res., 111, 2006.