README -- Contents of lightning_NOx_200203/
Bob Yantosca
bmy@io.harvard.edu
12 Mar 2002


Files:
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light_dist.dat       : PDF for lightning NOx by layer (Pickering et al 1998)

light_dist.dat.geos3 : The same data contained in "light_dist.dat", but
                       interpolated onto onto a finer grid for use w/ 
                       GEOS-3 meteorological fields.

light_dist.dat.yhw   : Original version of "light_dist.dat", from Yuhang
	               Wang.  Now obsolete, replaced by "light_dist.dat"

All files are in ASCII format.


Source:
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These files are use to partition the column lightning NOx into 
GEOS-CHEM model layers.  These are taken from from the paper by 
Pickering et al. 1998, JGR 103, 31,203-31,316.  

Pickering computes 3 different PDF's, one for tropical midlatitude lightning,
one for tropical continental lightning, and one for midlatitude continental
lightning.

Mat Evans (mje@io.harvard.edu) had to interpolate the Pickering PDF's onto
a finer vertical resolution grid since the GEOS-3 layers near the surface
are much thinner than GEOS-1, GEOS-STRAT.


Notes:
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(1) light_dist.dat       is read into GEOS-CHEM by routine "lightdist.f"
    light_dist.dat.geos3 is read into GEOS-CHEM by routine "lightdist.f"