B F Chao, R D Ray, J M Gipson, G D Egbert, C Ma, Diurnal/semidiurnal polar motion excited by oceanic tidal angular momentum, J. Geophys. Res., 101, 20151-63, 1996.
G D Egbert, A F Bennett, M G G Foreman, Topex/Poseidon tides estimated using a global inverse model, J. Geophys. Res., 99, 24821-52, 1994.
R D Ray, B F Chao, Z Kowalik, A Proshutinsky, Angular momentum of Arctic Ocean tides, J. Geodesy, 71, 344-350, 1997.
These angular momentum data are equivalent to those published by Chao et al. (1996), for their so-called Model C. The Chao et al. paper is the proper citation for these data. The angular momentum data are based on the TPXO.2 ocean tide model of Egbert et al. (1994), supplemented with Arctic Ocean data for selected tides from Ray et al. (1997). Egbert's TPXO.2 model is an assimilation model; it uses both a hydrodynamic model and tidal observations in the form of sea-surface height differences at the cross-over points of the Topex/Poseidon satellite.
Amplitude and Greenwich phase lag are given for major tidal constituents. The (x,y,z) Cartesian components of angular momentum refer to the (Greenwich, 90°E, North) axes. Momentum components are decomposed into those due to tidal oceanic heights, which perturb the inertia tensor, and tidal currents, which effect relative momentum exchanges between ocean and mantle.
Units of momentum amplitude are 1025 kg m2/s. Units of phase are degrees.
X Y Z
Tides amp pha amp pha amp pha
Q1 Heights 0.110 342.4 0.247 217.7 0.085 136.3
Q1 Currents 0.078 304.8 0.078 209.3 0.132 105.9
O1 Heights 0.447 334.8 1.123 222.3 0.230 158.8
O1 Currents 0.338 310.8 0.463 205.1 0.579 118.9
P1 Heights 0.138 316.4 0.425 222.3 0.036 0.3
P1 Currents 0.151 292.8 0.240 192.3 0.238 124.9
K1 Heights 0.456 311.1 1.351 222.5 0.149 26.3
K1 Currents 0.512 289.5 0.793 188.7 0.761 124.6
N2 Heights 0.142 348.7 0.036 259.8 0.083 68.6
N2 Currents 0.148 246.9 0.283 160.0 0.304 325.6
M2 Heights 0.576 12.3 0.423 306.4 0.631 82.1
M2 Currents 1.037 257.7 1.831 165.3 1.506 318.5
S2 Heights 0.137 50.5 0.328 4.8 0.308 124.5
S2 Currents 0.579 293.3 1.040 198.7 0.733 344.0
K2 Heights 0.030 53.1 0.088 2.1 0.087 125.9
K2 Currents 0.156 299.9 0.267 198.7 0.209 336.3