Accounting for terrain differences

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kaushistk007
Posts: 6
Joined: June 21st, 2020, 9:47 pm
Registered HYSPLIT User: No

Accounting for terrain differences

Post by kaushistk007 » June 24th, 2020, 9:11 am

How does hysplit account for the terrain heights and differences on ground (forests, lakes etc)?
Where can I find more details?
Thank you! :)

hyun.kim
Posts: 11
Joined: June 11th, 2020, 8:29 pm
Registered HYSPLIT User: Yes

Re: Accounting for terrain differences

Post by hyun.kim » June 24th, 2020, 9:27 am

HYSPLIT gets surface information from met. data, and uses default option if they are not available.
Files in bdyfiles diectory (LANDUSE.ASC, ROUGHLEN.ASC, TERRAIN.ASC) are ASCII files, and you can modify them if necessary.
Please, see detailed information at

https://ready.arl.noaa.gov/documents/Tu ... _fine.html

Hyun

dmitry
Posts: 1
Joined: June 19th, 2020, 3:47 pm
Registered HYSPLIT User: Yes

Re: Accounting for terrain differences

Post by dmitry » July 17th, 2020, 1:39 pm

Hi! Do I understand it right that these files in bdyfiles directory are read only in case the required data is missing in the met file? But how can I force HYSPLIT to read the modified terrain (e.g. TERRAIN.ASC) if the terrain variable is present in the met? What is the way?

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