Variables saved along parcel trajectories (pathlines)

1

In order to properly visualize variables along pathlines, does one need to change the default integration settings? Without checking the boxes in the screenshot titled “a,” the “VaporFlow” file selected in screenshot “b”

b
b846×576 31.3 KB

creates the following time series in screenshot “c.”
c
c856×505 21.2 KB

The stepping between values at each time step seems strange to me.

a
a842×310 26.9 KB

Any thoughts on such visualizations are much appreciated.

2

Hi @elucy , could you please clarify the issue a little bit? Specifically,

  1. Did you mean that the plot (in “C”) is not quite right, or that the checkboxes (in “A”) are not making sense?
  2. What’s the nature of the data to result in a vertical segment on the plot in “C”? We thought that there cannot be multiple Y values with the same X value?

Thanks!
Sam

3

Hello!

I think the plot in ‘C’ does not look quite right to me, especially with reference to your second point. That plot should just be the stretching term in the vorticity equation along a single pathline. And more generally, I think I’m confused about the options under integration settings in ‘A.’ I couldn’t find anything about that in the documentation. Thanks so much!

4

Hi @elucy , I see what you mean here. I think the best way to move forward is to provide us with a sample data set and briefly describe what you want to achieve. By doing so we can better understand your use case, and may also catch any error in the program (or provide better instructions to achieve your objectives).

5

You can find a sample data set at /glade/u/home/elucy/trajectories/datasets1/feature1_cm1out_15_00_to_15_10.nc

The objective is to save a variable, such as the stretching term (‘stretch’ in the netCDF file) along pathlines, and plot those time series.

Thanks again for the help.