Physics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.337...58s&link_type=abstract
Nature (ISSN 0028-0836), vol. 337, Jan. 5, 1989, p. 58-61. Research supported by the U.S. Navy, NSF, NATO, and CNRS.
Physics
60
Atmospheric Circulation, Ocean Currents, Ozone Depletion, Planetary Waves, Coriolis Effect, Polar Regions, Propagation Velocity
Scientific paper
The concentration of eastward planetary currents into strong wavy jets is a major feature of the atmospheric general circulation and of oceanic currents. Experiments are described which produce similar jets in a rotating annulus with mechanical forcing: the Coriolis force acting on fluid pumped radially inward from a ring of sources to a ring of sinks results in a strong eastward jet. The jet has a robust wavy shape for a wide range of parameters. The wave velocity and wavelength of these Rossby waves are accounted for by simple scaling arguments. Experiments with dye injected into the fluid show that the jet acts as a barrier to tracer transport, much as the southern polar night jet may act as a barrier to the transport of ozone from lower latitudes into the polar region.
Meyers Steven D.
Sommeria Joel
Swinney Harry L.
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