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GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 19, PAGES 3785-3788, OCTOBER 1, 2001 Experimental evidence of inertial waves in a precessing
 

Summary: GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 19, PAGES 3785-3788, OCTOBER 1, 2001
Experimental evidence of inertial waves in a precessing
spheroidal cavity
J´er^ome Noir, Daniel Brito, Keith Aldridge 1
and Philippe Cardin
Laboratoire de G´eophysique Interne et Tectonophysique, Observatoire de Grenoble, France
Abstract. We have demonstrated experimentally the ex-
istence of inertial waves in a slowly precessing spheroid of
fluid. Although such oscillatory internal shear layers have
been predicted theoretically and numerically, previous pre-
cession experiments had shown no evidence of their presence.
Using an ultrasonic Doppler velocimetry technique, profiles
of radial velocity have been measured in our precession ex-
periment. Comparison of these profiles with their synthetic
counterparts obtained numerically, proves the presence of
the predicted internal shear layers. They are emitted from
the breakdown of the Ekman layer at the two critical lat-
itudes of the fluid (around 30
and -30
) and propagate

  

Source: Aurnou, Jonathan - Department of Earth and Space Sciences, University of California at Los Angeles
Brito, Daniel - Laboratoire de Géophysique Interne et Tectonophysique, Observatoire de Grenoble, Université Joseph Fourier

 

Collections: Geosciences