Dispersion configuration

Topics about the HYSPLIT dispersion model.
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Jakehzqiao
Posts: 11
Joined: September 3rd, 2021, 8:45 pm
Registered HYSPLIT User: Yes

Dispersion configuration

Post 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.
alicec
Posts: 411
Joined: February 8th, 2016, 12:56 pm
Registered HYSPLIT User: Yes

Re: Dispersion configuration

Post 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.
Jakehzqiao
Posts: 11
Joined: September 3rd, 2021, 8:45 pm
Registered HYSPLIT User: Yes

Re: Dispersion configuration

Post 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!
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