Using the Seasat altimeter crossover differences, Perigaud and Minster
[1988] investigated the movement of the ``Great Whirl'' formed in the
Somali Current and found fair agreement between altimetry data and
in-situ data. Variability of the Somali Current was studied by
Perigaud and Delecluse [1989] using the Seasat altimeter data and
scatterometer data and numerical models. They found that
nonlinearity is crucial in explaining the observations. A large
anticyclonic eddy formed in the eastern Arabian Sea during the
northeast monsoon was studied by Bruce et al. [1994] using the
Geosat data with a numerical model. Perigaud and Delecluse [1992]
investigated the annual sea level variations using the Geosat altimeter
data and a shallow-water model. Significant correlation was found
between the first complex empirical orthogonal functions of both the
observation and the model simulation. This annual signal was
interpreted in terms of Rossby waves with the maximum amplitude
located near 12
S and 90
E. Using four years' worth of
the Geosat data, Perigaud and Delecluse [1993] investigated the
interannual sea level variations and compared the observation to the
simulation by a shallow-water model. Averaged over the basin
studied (north of 20
S), the observation and the simulation were
highly correlated (0.92). The signal was characterized by a sea level
rise during the 1986--87 El Niño with the maximum amplitude (5
cm) occurring in the southern domain (10
S--20
S).
They also used the Geosat data to test the quality of the wind driving
the model.