Concentration output from relative to absolute

[tschonholz]

Hi, I'm running HYSPLIT for volcanic ash scenarios and I was wondering if there was any way to change from relative concentrations (which is the actual output) to absolute concentrations and not relative to a unity of mass since VAAC tend to use this product output for forecasts and it would be useful to have that since airport operativity usually depends on absolute concentrations.
Thanks!!!

[barbara.stunder]

There is a relatively new interface on READY for volcanic ash simulations in which you can specify the actual source mass amount, and output concentration. See http://www.ready.noaa.gov/HYSPLIT_ash.php "(NEW) Compute archive volcanic ash concentrations".