GDAS 1 Degree vs 0.5 Degree

Topics about the HYSPLIT dispersion model.
Post Reply
Smaug
Posts: 55
Joined: July 1st, 2017, 8:28 am
Registered HYSPLIT User: No

GDAS 1 Degree vs 0.5 Degree

Post by Smaug »

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: 248
Joined: February 8th, 2016, 12:56 pm
Registered HYSPLIT User: Yes

Re: GDAS 1 Degree vs 0.5 Degree

Post by alicec »

No, they both have 3 hour temporal resolution.
Smaug
Posts: 55
Joined: July 1st, 2017, 8:28 am
Registered HYSPLIT User: No

Re: GDAS 1 Degree vs 0.5 Degree

Post by Smaug »

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: 248
Joined: February 8th, 2016, 12:56 pm
Registered HYSPLIT User: Yes

Re: GDAS 1 Degree vs 0.5 Degree

Post by alicec »

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
fvelarde6
Posts: 1
Joined: October 16th, 2018, 9:59 am
Registered HYSPLIT User: No

Re: GDAS 1 Degree vs 0.5 Degree

Post by fvelarde6 »

Hi guys:
Do you know how can I join the weekly met data files of GDAS1 in just one file?
alicec
Posts: 248
Joined: February 8th, 2016, 12:56 pm
Registered HYSPLIT User: Yes

Re: GDAS 1 Degree vs 0.5 Degree

Post by alicec »

The ARL files can be concatenated.
On linux

cat file2.ARL > file1.ARL
Post Reply