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Dispersion configuration
Posted: October 12th, 2021, 9:23 am
by Jakehzqiao
Hi everyone. How I can get ug/m3 contour by using HYSPLIT. For instance, a source emission rate is 3 g/s of SO2. How I can configure the HYSPLIT then I can get contour in ug/m3. What I tried only get very very small concentration which is around 1E-08/m3. This value is much lower than what I simulated by using AERMOD for the same scenario.
Re: Dispersion configuration
Posted: October 14th, 2021, 8:21 am
by alicec
Emission rates in HYSPLIT are input in mass unit /h
https://www.ready.noaa.gov/hysplitusersguide/S312.htm
The easiest way to do what you want is to convert your emission rate in g/s to ug/h.
3 g/s * 3600 s/h * 1e6 ug/g = 1.08e10 ug/h
if you input this as the emission rate, then your output will be in ug/m3.
You can also do the conversion after the run e.g. If you used
3 g/s * 3600 s/h = 1.08e4 g/h
as the emission rate, then your output is in g/m3. To convert to ug/m3 simply multiply the concentration values by 1e6.
Re: Dispersion configuration
Posted: October 16th, 2021, 8:18 am
by Jakehzqiao
alicec wrote: ↑October 14th, 2021, 8:21 am
Emission rates in HYSPLIT are input in mass unit /h
https://www.ready.noaa.gov/hysplitusersguide/S312.htm
The easiest way to do what you want is to convert your emission rate in g/s to ug/h.
3 g/s * 3600 s/h * 1e6 ug/g = 1.08e10 ug/h
if you input this as the emission rate, then your output will be in ug/m3.
You can also do the conversion after the run e.g. If you used
3 g/s * 3600 s/h = 1.08e4 g/h
as the emission rate, then your output is in g/m3. To convert to ug/m3 simply multiply the concentration values by 1e6.
Thanks for your always helping!