FN Archimer Export Format
PT J
TI Vortex pairing in an unstable anticyclonic shear flow: discrete subharmonics of one pendulum day
BT 
AF FLAMENT, Pierre
   LUMPKIN, Rick
   TOURNADRE, Jean
   ARMI, Laurence
AS 1:;2:;3:;4:;
FF 1:PDG-DRO-DOPS-LOS;2:;3:PDG-DRO-DOPS-LOS;4:;
C1 Inst Francais Rech Exploitat Mer, Dept Oceanog Spatiale, F-29280 Plouzane, France.
   Univ Hawaii, Sch Ocean & Earth Sci & Technol, Dept Oceanog, Honolulu, HI 96822 USA.
   Florida State Univ, Dept Oceanog, Tallahassee, FL 32306 USA.
   Univ Calif San Diego, Scripps Inst Oceanog, Inst Geophys & Planetary Phys, La Jolla, CA 92093 USA.
C2 IFREMER, FRANCE
   UNIV HAWAII, USA
   UNIV FLORIDA STATE, USA
   UNIV CALIF SAN DIEGO, USA
SI BREST
SE PDG-DRO-DOPS-LOS
IN WOS Ifremer jusqu'en 2018
   copubli-int-hors-europe
IF 1.912
TC 33
UR https://archimer.ifremer.fr/doc/2001/publication-644.pdf
LA English
DT Article
DE ;Vortex;Oceanic shear flow
AB Observations of the downstream evolution of an oceanic zonal horizontal shear flow at a Reynolds number of about 10(11), formed as the westward North Equatorial Current passes the island of Hawai'i, reveal finite-amplitude anticyclonic vortices resulting from instability of the shear. The initial orbital period of the vortices is exactly one pendulum day (3.1 days at this latitude), centrifugal instability presumably inhibiting stronger vortices from forming. As they move downstream, they appear to pair and merge into successively larger vortices, in a geometric sequence of longer orbital periods; three subharmonic transitions are suggested with final orbital periods near 6, 12 and 24 days.
PY 2001
PD AUG
SO Journal of Fluid Mechanics
SN 0022-1120
PU Cambridge University Press
VL 440
UT 000170498400015
BP 401
EP 409
DI 10.1017/S0022112001004955
ID 644
ER

EF