[RegCNET] Querries about RegCM3 Aerosol run

[Fabien SOLMON]

Hi Dilip
Yes you have to simply make the sum of extinctions to get the total AOD
.... ext8 is dimensionless ( it already accounts for the thickness of
the layer, it is equivalent to a 'layer AOD' ) .. it is given for the 8th band of the CCM radiative code ,
i.e the visible band 8 ( 350 - 640 nm )

here are all the spectral bands ( wavemin-wavemax) considered in the code

    data wavmin / .200,  .245,  .265,  .275,  .285,
     $              .295,  .305,  .350,  .640,  .700,  .701,
     $              .701,  .701,  .701,  .702,  .702,
     $             2.630, 4.160, 4.160/

      data wavmax / .245,  .265,  .275,  .285,  .295,
     $              .305,  .350,  .640,  .700, 5.000, 5.000,
     $             5.000, 5.000, 5.000, 5.000, 5.000,
     $             2.860, 4.550, 4.550/



Dilip Ganguly a écrit :
> Hi,
>
> I would like to know the unit of the parameter 'aext8' (aerosol extinction 
> coefficient) in RegCM chemistry output files. Is it (m-1) or (km-1) ? What 
> is the wavelength at which 'aext8' has been calculated? Is it possible to 
> get aerosol optical depth (AOD) by integrating 'aext8' over different levels 
> in the atmosphere. Is it possible to derive AOD at more than one wavelength 
> from the RegCM output.
>
> Thanks,
>
> Dilip. 
>   
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>         Dr. DILIP GANGULY                               
>         Space And Atmospheric Sciences Division      
>         Physical Research Laboratory                
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