R D Ray, Updated model of short-period tidal variations in earth rtation, IERS Tech Note 28, pp 1-4, Paris, 2000.
R D Ray, A global ocean tide model from Topex/Poseidon altimetry: GOT99.2, NASA Tech Memo 209478, 58 pp., Goddard Space Flight Center, 1999.
R D Ray, Inversion of oceanic tidal currents from measured elevations, Journal of Marine Systems, in press, 2000.
Reprints/copies of these publications can be obtained by contacting Richard Ray (richard.ray@gsfc.nasa.gov).
These angular momentum data for tidal periods correspond to the ocean model GOT99.2 of Ray (1999). (Note: GOT = Goddard/Grenoble Ocean Tide.) The ocean data are primarily based on the tidal analyses of 6 years of Topex/Poseidon altimeter data, supplemented with several hydrodynamic models in shallow and polar seas. See Ray (1999) for details on model development, as well as for comparisons of the model with tide gauge measurements. Tidal current velocities are based on a least-squares inversion algorithm that fits to a linearized form of Laplace's tidal equations.
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 0.115 341.6 0.261 215.9 0.070 133.8
Q1 Currents 0.071 295.7 0.071 205.5 0.128 109.0
O1 Heights 0.466 328.4 1.166 221.1 0.201 150.7
O1 Currents 0.286 317.7 0.389 213.7 0.593 118.2
P1 Heights 0.155 309.2 0.463 222.7 0.040 39.6
P1 Currents 0.168 283.8 0.248 189.6 0.251 128.8
K1 Heights 0.458 307.0 1.381 222.8 0.142 30.9
K1 Currents 0.521 287.9 0.749 192.2 0.766 130.0
N2 Heights 0.121 347.5 0.040 232.3 0.047 77.9
N2 Currents 0.115 246.7 0.227 157.4 0.302 327.8
M2 Heights 0.514 12.2 0.358 305.3 0.599 85.9
M2 Currents 0.978 258.1 1.752 163.5 1.602 320.7
S2 Heights 0.114 40.3 0.275 7.1 0.244 132.9
S2 Currents 0.518 301.4 0.943 201.6 0.714 342.4
K2 Heights 0.036 40.0 0.086 0.0 0.072 120.5
K2 Currents 0.138 297.7 0.259 198.4 0.215 341.7