README -- Describes contents of HEMCO/BROMINE/v2015-02 directory
17 Feb 2015
GEOS-Chem Support Team
geos-chem-support@g.harvard.edu


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

This directory contains emission fluxes and scale factors for the very-short-
lived Bromine species (CHBr3 and CH2Br2).  From Qing Liang.

The original files were in binary punch format.  They were originally stored
in the old GEOS-Chem data path: GEOS_NATIVE/bromine_201205/VSL_emissions.

Christoph Keller and the GEOS-Chem Support Team have created COARDS-compliant
netCDF files from the bpch data.  


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

Bromocarb_Liang2010.nc 

 -- Emissions of very-short-lived (VSL) species CHBr3 and CH2Br2.
    Resolution  : GEOS-Chem 2 x 2.5 grid (144 x 91 boxes)
    Units       : kg m-2 s-1
    Timestamp   : 2000/01
    Compression : Level 1 (e.g. nccopy -d1) 


BromoCarb_Season.nc

 -- Seasonal scale factors for CHBr3 and CH2Br2.
    Resolution  : GEOS-Chem 2 x 2.5 grid (144 x 91 boxes)
    Units       : kg m-2 s-1
    Timestamp   : 2000/01
    Compression : Level 1 (e.g. nccopy -d1) 

LiangRegions.nc 

 -- Mask files for use with the VSL emissions data in Bromocarb_Liang2010.nc.
    Resolution  : GEOS-Chem 2 x 2.5 grid (144 x 91 boxes)
    Units       : kg m-2 s-1
    Timestamp   : 2000/01
    Compression : Level 1 (e.g. nccopy -d1) 


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

(1) 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.

(2) 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'', __Atmos. Chem. Phys.__, 12, 
      6723-6740, 2012. 

(3) 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.

(4) Yang, X., Cox, R. A., Warwick, N. J., Pyle, J. A., Carver, G. D., 
      O’Connor, F. M., and Savage, N. H.: "Tropospheric bromine chemistry 
      and its impacts on ozone: A model study", __J. Geophys. Res.__,  110, 
      D23311, doi:10.1029/2005JD006244, 2005.

(5) Yang, X., Pyle, J. A., and Cox, R. A.: "Sea salt aerosol production and 
      bromine release: Role of snow on sea ice", +_Geophys. Res. Lett.__, 
      35, L16815, doi:10.1029/2008GL034536, 2008.


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#####                   ORIGINAL README FOLLOWS HERE                      #####
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! Qing Liang -- 07/30/2009
! README file for short-lived bromine emissions

CHBr3 and CH2Br2 Emission Distribution
1. Global emission of CHBr3 is 440 Gg/yr.
   Emission distribution:
     Open ocean emissions:
       50S-90S :   0 Gg/yr
       10S-50S :  50 Gg/yr
       10S-10N : 150 Gg/yr
       10N-50N :  60 Gg/yr
       50N-90N :   5 Gg/yr
     Coastal emissions:
       50S-90S :   0 Gg/yr
       10S-50S :  50 Gg/yr
       10S-10N :  20 Gg/yr
       10N-50N : 100 Gg/yr
       50N-90N :   5 Gg/yr

2. Global emission of CH2Br2 is 62 Gg/yr.
   CH2Br2 has the same emission distribution proportion as CHBr3.
   Emission distribution:
     Open ocean emissions:
       50S-90S :  0.0 Gg/yr
       10S-50S :  7.0 Gg/yr
       10S-10N : 21.1 Gg/yr
       10N-50N :  8.5 Gg/yr
       50N-90N :  0.7 Gg/yr
     Coastal emissions:
       50S-90S :  0.0 Gg/yr
       10S-50S :  7.0 Gg/yr
       10S-10N :  2.8 Gg/yr
       10N-50N : 14.1 Gg/yr
       50N-90N :  0.7 Gg/yr