How to set up HYSPLIT Modeling on PC for calculationg concentration of volcanic ash.

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miki0829
Posts: 4
Joined: October 31st, 2019, 1:05 am
Registered HYSPLIT User: No

How to set up HYSPLIT Modeling on PC for calculationg concentration of volcanic ash.

Post by miki0829 » October 31st, 2019, 1:21 am

I'm trying to calculate concentration of volcanic ash by using NOAA's HYSPLIT modeling on PC version; hysplit4. However, the calculations always have been failed. *ERROR*
The numbers of Deposition Set-up must be wrong.
deposition.PNG
Deposition velocity (m/s), Pollutant molecular weight (Gram/Mole), Surface Reactive Ratio, Diffusivity Ratio, Effective Henry's Constant are suggested numbers in Table 1 in "Help" but the values for calculation of volcanic ash is not suggested.
tab1.PNG

Although Pollutant molecular can be given as SiO2, the others are difficult to detect the numbers.
Please give me advice.

barbara.stunder
Posts: 336
Joined: November 9th, 2012, 4:23 pm
Registered HYSPLIT User: Yes

Re: How to set up HYSPLIT Modeling on PC for calculationg concentration of volcanic ash.

Post by barbara.stunder » November 4th, 2019, 3:23 pm

We don't know exactly what is in the ash, so approximations are made. In that GUI section, first do a run choosing Particle, and no wet, no dry deposition. Save the CONTROL file for reference. Then add dry deposition, which will give a value for the deposition velocity. Then add wet deposition.

miki0829
Posts: 4
Joined: October 31st, 2019, 1:05 am
Registered HYSPLIT User: No

Re: How to set up HYSPLIT Modeling on PC for calculationg concentration of volcanic ash.

Post by miki0829 » November 14th, 2019, 12:36 am

Thank you for replying. I'll try it!

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