Creating .nc file using Greate_Region.

Discussions related to downloading and compiling MPAS-Atmosphere.
Post Reply
FLUIDDYNAMICS2
Posts: 7
Joined: Fri Jun 19, 2020 10:49 pm

Greating .nc file from x1 or x4 data.

Post by FLUIDDYNAMICS2 » Sun Jun 21, 2020 5:52 am

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
Attachments
Screen Shot 2020-06-21 at 1.29.58 AM.png
Screen Shot 2020-06-21 at 1.29.46 AM.png

FLUIDDYNAMICS2
Posts: 7
Joined: Fri Jun 19, 2020 10:49 pm

Creating .nc file using Greate_Region.

Post by FLUIDDYNAMICS2 » Sun Jun 21, 2020 6:50 pm

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. :?:
Attachments
Screen Shot 2020-06-21 at 1.29.46 AM.png
Screen Shot 2020-06-21 at 1.29.58 AM.png

mcurry
Posts: 47
Joined: Mon Oct 29, 2018 5:33 pm
Location: Boulder, Co

Re: Creating .nc file using Greate_Region.

Post by mcurry » Wed Jun 24, 2020 12:18 am

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: Select all

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!
NCAR|MMM

FLUIDDYNAMICS2
Posts: 7
Joined: Fri Jun 19, 2020 10:49 pm

Re: Creating .nc file using Greate_Region.

Post by FLUIDDYNAMICS2 » Mon Jun 29, 2020 4:35 am

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.

namelist.input
Nmaelist file
Namelist file for grid_rotate
(234 Bytes) Downloaded 18 times
Attachments
Screen Shot 2020-06-28 at 12.45.47 AM.png
Can't recreate this domain
Screen Shot 2020-06-28 at 11.44.19 PM.png
Image of domain created with namelist above

mgduda
Posts: 362
Joined: Mon Feb 26, 2018 7:35 pm

Re: Creating .nc file using Greate_Region.

Post by mgduda » Tue Jul 07, 2020 7:12 pm

If you haven't already done so, it might be worth going through the online MPAS-Atmosphere tutorial, especially section 4, before attempting your own limited-area simulation. From the tutorial, the following two sets of slides may be of particular help:
  1. Variable-resolution meshes, I/O streams, restart runs, and other options (specifically, the slides about variable-resolution meshes)
  2. Preparing limited-area meshes and lateral boundary conditions
NCAR/MMM

Post Reply

Return to “Compilation / installation”