[RegCNET] single scattering albedo

[Fabien SOLMON]

Monica Santese a écrit :

Hi Monica

If you divide the assa 3D field ( in CHE. outputs) by the aext fields
and you average over the vertical, you theorectically obtain an
effective single scattering albedo representing an 'average aerosol' in
the column.
Despite its confusing name, the assa field is not a 'real' single
scattering albedo but more the ' aerosol layer reflectivity'   , and
aext could be a named  a 'layer AOD '  ( you sum aext verticallt to get
the total AOD)

Be carefull to the fact that aext8 , assa8 agfu8 and are  not properly
interpolated on the pressure grid using the new postproc or sigma2p (
since they are extensive variables depending on the layer thickness). 
For AOD  and columnar SSA calculation USE ALWAYS THE SIGMA LEVEL output
... We should think about revising these variables  for  interpolation
on the pressure grid  ( i.e  outputing an extinction in  m-1 rather than
a layer AOD)...


Cheers

Fabien


Monica Santese a écrit :
> Dear users,
>  
> have you never calculated the columnar single scattering albedo  by
> the assa8 parameters on the CHE. file?
>  
> Thank you
>  
>  
> PhD.Monica Santese
> CMCC - Physics Department - University of Salento
> via Arnesano - 73100 Lecce, Italy
>  
> e-mail: monica.santese at le.infn.it <mailto:monica.santese at le.infn.it>
> phone:  +39-0832-297502 (office)
>              +39-0832-297481 (laboratory)
> fax:       +39 -0832-297505
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