Post questions, comments and links to research (research papers, web sites, etc) involving HYSPLIT and volcanic ash. This section is also to facilitate collaborations between researchers involved in volcanic ash transport and dispersion.
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A bug was fixed in the relatively new capability in READY for computing archive volcanic ash concentrations when the mass eruption rate is calculated from the eruption column height. To correct runs previously done, divide the concentrations by the eruption duration, or re-run the case. I apologize for the inconvenience. http://www.ready.noaa.gov/HYSPLIT_ash.php