Sr. Jayne et R. Tokmakian, FORCING AND SAMPLING OF OCEAN GENERAL-CIRCULATION MODELS - IMPACT OF HIGH-FREQUENCY MOTIONS, Journal of physical oceanography, 27(6), 1997, pp. 1173-1179
Significant inertial oscillations are present in all primitive equatio
n ocean general circulation models when they are forced with high-freq
uency (period order of days) wind stress fields. At specific latitudes
the energy of the wind stress forcing near the frequency of the inert
ial oscillations excites large amplitudes in the surface kinetic energ
y. The frequently used strategy of subsampling model output at several
day intervals then leads to aliasing of the energetic inertial curren
ts into lower frequencies that vary with latitude, which severely corr
upts even integral quantities like meridional heat transport. This not
e discusses the effect of forcing and sampling at short periods. Schem
es are provided that will remove the aliased energy from the model fie
lds stored for later analysis.