GDAS 1 Degree vs 0.5 Degree

Topics about the HYSPLIT dispersion model.
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Smaug
Posts: 13
Joined: July 1st, 2017, 8:28 am
Registered HYSPLIT User: No

GDAS 1 Degree vs 0.5 Degree

Post by Smaug » November 15th, 2017, 7:41 am

Hi,

Does the temporal resolution between the GDAS 1 Degree and GDAS 0.5 Degrees available on the FTP Server differ?

Many Thanks

alicec
Posts: 58
Joined: February 8th, 2016, 12:56 pm
Registered HYSPLIT User: Yes

Re: GDAS 1 Degree vs 0.5 Degree

Post by alicec » November 16th, 2017, 12:30 pm

No, they both have 3 hour temporal resolution.

Smaug
Posts: 13
Joined: July 1st, 2017, 8:28 am
Registered HYSPLIT User: No

Re: GDAS 1 Degree vs 0.5 Degree

Post by Smaug » November 28th, 2017, 1:19 pm

Thanks,


Up to what altitudes do these met files go up to? It seems HYSPLIT produces an error if the top of the atmospheric domain is greater than 100km.

alicec
Posts: 58
Joined: February 8th, 2016, 12:56 pm
Registered HYSPLIT User: Yes

Re: GDAS 1 Degree vs 0.5 Degree

Post by alicec » November 28th, 2017, 1:47 pm

You can run profile on the meteorological data which will give you both the time resolution and the
pressure levels. gdas goes up to about 10 mbar (about 25 km) which is sufficient for most purposes.

If you really need up to lower pressure levels then your best option may be to download
the merra2 dataset which goes up to 0.01 Pa.
viewtopic.php?f=14&t=1353



Cheers,
Alice

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