Blob for Infra Gravity waves

[meenakshisreejith]

Hello All
Im running WAVEWATCH III model from infra gravity waves in the frequency width 0.06-0.3 Hz. The run is completed successfully but the output has blobas. I am running for a 0.5degree global grid. Can you please help in this regard?

[JessicaMeixner-NOAA]

@meenakshisreejith I'm not sure I understand what the issue is. Can you provide some additional information?

[JessicaMeixner-NOAA]

What are your time steps that you are using?

[meenakshisreejith]

Hello Maam
These are my time steps:
1200. 600. 700. 30.

[JessicaMeixner-NOAA]

What is your highest latitude?

[meenakshisreejith]

This is my grid detail:

LON LONGITUDE 720mr 0E 0.5W
LAT LATITUDE 321 r 80S 80N

[JessicaMeixner-NOAA]

The CFL condition can be found here: https://github.com/NOAA-EMC/WW3/wiki/FAQs-page#cfl-condition
for your set-up:
123766 * Δx * cosd(max(latitude))f
1237660.5*cosd(80)*0.006
64.4752
So you need much smaller time steps.