search

Energy-Pathways-Group / GLOceanKit

Tools for physical oceanography in Matlab and Objective-C
21 stars 11 forks source link

Advice on value of k #91

Open InleEfrafa opened 8 months ago

InleEfrafa commented 8 months ago

Do you have any guidance for the constant value of K to choose for the EVP whilst attempting to determine RMS values for vertical for a given stratification profile?

Many thanks

JeffreyEarly commented 8 months ago

Yes. If you are just looking to project a given density or velocity profile, you'll want to assume the hydrostatic modes. That is effectively like setting k=0.

InleEfrafa commented 8 months ago

That makes sense, thank you. Would I then be correct in assuming that to get the displacement I just integrate wrt t, which is the same as multipling by the frequency and shifting the phase by pi/2? Then the standard integral to get RMS displacement(z) seems to be to integrate the sum of the displacement modes wrt w (omega).

JeffreyEarly commented 8 months ago

It depends on the particular dynamical variable you're interested in, and whether you're interested in waves or geostrophic motions. Check out equations 6 and 9 for the correct usage.

Does that answer your question?