Technical bits: Equatorial geostrophy

ocean-eddy-cpt / WP1T2-2D-EKE-Analysis

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Technical bits: Equatorial geostrophy #3

Open kdrushka opened 3 years ago

kdrushka commented 3 years ago

how close to the equator is reasonable?

Check surface drifter EKE estimates for what equatorial EKE might resemble.
Want to get closer than ±20°

jakesteinberg commented 3 years ago

I wanted a reference for reasonable velocities near the equator (this comes from the noaa surface drifter program). I can easily extend estimates closer to the equator, but was being conservative because velocities start to get large and without this reference I wasn't sure to what extent these are real.

jakesteinberg commented 3 years ago

After revisiting the geostrophic velocity calculation and comparing to 5 years of gridded AVISO, I am more confident in my estimates. Comparison with the above figure also shows relatively good geographic pattern agreement. Seems like along-track estimates can be a few times more energetic than the gridded equivalent. j2_along_track_vs_gridded