Other
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.325..421a&link_type=abstract
Nature (ISSN 0028-0836), vol. 325, Jan. 29, 1987, p. 421-423. NSERC-supported research.
Other
45
Earth Core, Earth Rotation, Hydrodynamics, Inertia, Wave Propagation, Earth Mantle, Geodynamics
Scientific paper
Several inertial waves have been identified in the long-period gravimetric data of Melchior and Ducarme (1986). These hydrodynamical waves, which only exist because of the earth's rotation, must be in the earth's fluid outer core. Close proximity of the observed periods to those predicted for a homogeneous fluid suggests that the waves should be labelled inertial because buoyancy and compressibility effects must be small or self-cancelling. Some of the identified waves have azimuthal wavenumber one, consistent with their occurrence after large, deep earthquakes which probably excite the waves through a small perturbation in the earth's rotation. Other waves are axially symmetric, consistent with a small change in the magnitude of the fluid core's rotation rate. All the waves decay more rapidly than would be expected for Ekman dissipation, which suggests an additional dynamical damping associated with mantle-inner core coupling. The inertial waves identified here will serve as a precise tool for subsequent evaluation of models for core dynamics and geodynamics.
Aldridge Keith D.
Lumb L. I.
No associations
LandOfFree
Inertial waves identified in the earth's fluid outer core does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Inertial waves identified in the earth's fluid outer core, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inertial waves identified in the earth's fluid outer core will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1624105