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Creating .nc file using Greate_Region.

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FLUIDDYNAMICS2

New member
Greetings,

I am trying to create a high resolution domain that extends east of Africa and to the Gulf of Mexico. So fair I used two tools MPAS-TOOLS and MPAS-Limted-area to generate a mesh .nc file. I wanted to know what does the blue color mean for the .nc files I created using the .create_region in the MPAS-Limted-area tool using the points channel tropics with coordinates ulat: 35.43, llat: -35.43, ulon: 0.0, and llon: 80.0.


Thanks,

Travis
 

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Greetings,

I am trying to create .nc file from x4.535554.grid.nc for the tropical regions of the North Atlantic and Caribbean. Using the tropical channel points in MPAS-Limited region; my file with the Lat and Lon are ulat: 35.43676, llat: -35.43676, ulon: 0.00 and llon: 80.0. My first questions is what does the blue represent in the .nc files I attached below? Secondly, how can I get the mesh and .nc file to create a domain for the tropical regions of the Caribbean and the North Atlantic waters. :?:
 

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  • Screen Shot 2020-06-21 at 1.29.58 AM.png
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This post appears it was duplicated by accident. Because each post slightly differs, I have merged them together.

Before I answer your two questions, it appears that you are using the custom method for creating your region instead of the tropics method. Creating a tropics method should only contain two sets of coordinate specification: ulat, and llat (upper and lower lat). This is because the tropical method creates two unconnected boundaries, with the region spanning all longitudes.

It is hard to determine what the blue area represents in the plots you have provided. There are a number of fields that this plot could be. If this is a plot that was created by you, I would checked the file that was used to create this plot, which will contain the reference to the variable that was used to produce this plot. If you have the file, and have trouble determine what field it could be, please feel free to attach it here and we can help determine which field it is.

If you want to create a region using the create_region tool found in MPAS-Limited-Area , that spans from the equator to the tropics of cancer, you could use a points file like the following:

Code:
Name: my-channel
Type: channel
ulat: 23.43676
llat: 0.0

Note, however, you will want to edit ulat, and llat to for the exact domain you want!
 
I have attached the image of a mesh I created using grid_rotate with the namelist.input connected, and 60 km to 15 km mesh provided by MPAS. I want to create a domain for the deep tropics and another one for the entire Atlantic. Two weeks ago, I ran the WPS with my forcing data GFS0.25 deg and have my GFS and MET files. My question is, what tools provided by MPAS either the mpas-limited-area or grid_rotate do I use the forcing data to create the mesh? The goal is to compare my WRF-ARW TC's cases for previous years storms to MPAS-atmosphere.


View attachment namelist.input
 

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