Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2025m&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 10, p. 2025-2028
Physics
13
Oceanography: Physical: Eddies And Mesoscale Processes, Oceanography: Physical: Fronts And Jets, Oceanography: Physical: Western Boundary Currents
Scientific paper
A meander-formation mechanism of the Kuroshio that involves anticyclonic eddies propagating from the Kuroshio Extension, is presented using the analysis of observations of the TOPEX/POSEIDON (T/P) altimeter data and in situ data. Support of the mechanism comes also from a numerical simulation. In October 1997, a current meter mooring over the Izu Ridge at 500-m-depth captured large velocity fluctuations of about 50 cm s-1 that were associated with a strong anticyclonic eddy. The observations from T/P show that the anticyclonic eddy propagated westward and collided with the Kuroshio off Kyushu. At collision, the anticyclonic eddy coupled with a cyclonic circulation accompanied by a small meander and formed a vortex pair. They were then advected downstream and finally formed a large-meander-like path off the south coast of Honshu. The meander lasted for a few months. Subsequently, the anticyclonic eddy was detached, and the meander grew smaller in amplitude. Numerical experiments successfully simulate this interaction between the Kuroshio and anticyclonic eddies.
Mitsudera Humio
Taguchi Bunmei
Waseda Takuji
Yoshikawa Yasushi
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