Regional Eddy Kinetic Energy Animations
Annual mean surface velocity was calculated from 12 monthly
average output files and also from 365 daily ocean snapshot files.
The values were within + 0.04 cm/s, so the annual mean calculated
from the monthly average files was used in all eddy kinetic energy (EKE)
This distinction is made as the monthly average output
files are 3D in temperature, salinity and velocity, whereas the daily snapshot
files only contain surface velocity among other select variables.
Using the annual mean from monthly averages will allow calculation of EKE
for layers other than the surface, although they will be monthly mean values.
The daily EKE values show 4 to 6 times more variability than the monthly
Daily values of u' and v' were then calculated by subtracting the annual mean surface velocity from the daily surface velocities. Daily values of EKE were calculated as 1/2 the sum of the squares of u' and v'.
The approximate file sizes are listed - these are very large files, slow connections beware. If you are having difficulty downloading the animations from this page, please contact us and we can set up an alternate means of getting you the animation.
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- Last modified 29 January 2003 -
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