Example

Once you have access to the CASL server or installed the CASL algorithm software on your own computer you can try the following example. If this example does not work or is not clearly explained please email .

We will run a 1-layer quasi-geostrophic model in a periodic channel simulating the free evolution of a random initial state.

% cd ~/cs/chan/bin/ % runturb

Choose all the default options except:

Number of steps between data saves (default 20)? Choose instead 10.
Duration of simulation (default 25.000)? Choose instead 2.5.
Job directory name? Choose any name, e.g. tmp01

Follow the instructions, i.e.

% cd ~/cs/chan/ranpv/xxxx

where xxxx is the directory name chosen above, e.g. tmp01.

% bat log chancs

The model is now running!

To check the progress:

% tail -f log

The model run takes a few minutes.

Viewing the output

% movie

Pixel width of each image? Choose 256.
Do you want to see ... Choose option 1
... minimum and maximum |PV| to be displayed: Choose 0 6.28
... wish to use (<= 84)? Choose 84.
... frames: Choose 1 10

The movie is generated and an external window opens. Please make sure you can open external windows on your computer. Click Shift-<middle-button> to enter movie mode. Press <right-button> for animation. This might not work at a remote computer. If this is the case just Click Shift-<left-button> to advance 1 frame. Repeat this until you reach the last frame.

If you cannot get a window, call the shell script directly, i.e.

% show-movie