Sulphate extinction wavelength

[thibaut_lurton@cnrs-orleans_fr]

Hello to all,
Using the FSDWSF sulphate compset, does anyone know at what wavelength the sulphate extinction is calculated? (i.e. for the PURSULEX output variable and I guess PURSULOD too.) This piece of information does not appear in the master field list. Many thanks in advance.Thibaut.

 

[bardeenc]

These are both simple approximations assuming that the particles are in the geometric limit. If you want accurate estimates at specific wavelengths, then you will need to do offline calculations using the information CARMA has about the size distribution of your particles. The code for these calculations is in carma_intr.F90:             ! Calculate the optical depth and extinction.            !            ! NOTE: Assume Qext = 2 for optical depth. This can be pulled out of CARMA            ! mie claculations later.            !            ! Convert extinction coefficient to km-1.            extinctionCoefficient(:) = 2.0_r8 * PI * (r(ibin)**2)            ex(:) = ex(:) + numberDensity(:) * extinctionCoefficient(:) * 1e5_r8            od(:) = od(:) + numberDensity(:) * extinctionCoefficient(:) * dz(:) * 100._r8