• Cox, M., 1980: Generation and propagation of 30-day waves in a numerical model of the Pacific. J. Phys. Oceanogr.,10, 1168–1186.

  • Eliassen, A., and E. Palm, 1960: On the transfer of energy in stationary mountain waves. Geofys. Publ.,22 (3), 1–23.

  • Halpern, D., R. A. Knox, and D. S. Luther, 1988: Observations of 20-day period meridional current oscillations in the upper ocean along the Pacific equator. J. Phys. Oceanogr.,18, 1514–1534.

  • Hansen, D., and C. Paul, 1984: Genesis and effects of long waves in the equatorial Pacific. J. Geophys. Res.,89, 10431–10440.

  • Lukas, R., 1987: Horizontal Reynolds stresses in the central equatorial Pacific. J. Geophys. Res.,92, 9453–9463.

  • Luther, D. S., and E. S. Johnson, 1990: Eddy energetics in the upper equatorial Pacific during the Hawaii-to-Tahiti shuttle experiment, J. Phys. Oceanogr.,20, 913–944.

  • McCreary, J. P., and Z. Yu, 1992: Equatorial dynamics in a 2½-layer model. Progress in Oceanography, Vol. 29, Pergamon, 61–132.

  • Philander, S. G. H., W. J. Hurlin, and R. C. Pacanowski, 1986: Properties of long equatorial waves in models of the seasonal cycle in tropical Atlantic and Pacific Oceans. J. Geophys. Res.,91, 14207–14211.

  • Proehl, J. A., 1996: Linear stability of equatorial zonal flows. J. Phys. Oceanogr.,26, 601–621.

  • Qiao, L., and R. H. Weisberg, 1995: Tropical instability wave kinematics: Observations from the Tropical Instability Wave Experiment (TIWE). J. Geophys. Res.,100, 8677–8693.

  • ——, and ——, 1997: The zonal momentum balance of the Equatorial Undercurrent in the central Pacific. J. Phys. Oceanogr.,27, 1094–1119.

  • Reynolds, R. W., and T. M. Smith, 1994: Improved global sea surface temperature analysis using optimum interpretation. J. Climate,7, 929–948.

  • Weisberg, R. H., 1984: Instability waves observed on the equator in the Atlantic Ocean during 1983. Geophys. Res. Lett.,11, 754–756.

  • ——, and T. J. Weingartner, 1988: Instability waves in the equatorial Atlantic Ocean. J. Phys. Oceanogr.,18, 1641–1657.

  • Wilson, D., and A. Leetmaa, 1988: Acoustic Doppler current profiling in the Equatorial Pacific in 1984. J. Geophys. Res.,93, 13947–13966.

  • Yu, Z., J. P. McCreary, and J. A. Proehl, 1995: Meridional asymmetry and energetics of tropical instability waves. J. Phys. Oceanogr.,25, 2997–3007.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 131 131 7
PDF Downloads 36 36 3

Tropical Instability Wave Energetics: Observations from the Tropical Instability Wave Experiment

View More View Less
  • 1 Department of Marine Science, University of South Florida, St. Petersburg, Florida
© Get Permissions Rent on DeepDyve
Restricted access

Abstract

Ocean velocity data from an array of subsurface moorings deployed from May 1990 to June 1991 during the Tropical Instability Wave Experiment are used to study the energetics of planetary waves in the vicinity of the equator at 140°W. Such waves, observed from August to December 1990, were initiated by barotropic instability arising primarily from the cyclonic shear region of the South Equatorial Current and Equatorial Undercurrent just north of the equator. Subsequently, local barotropic production continued to maintain and modulate these tropical instability waves through a combination of cyclonic shear and meridional velocity component divergence just north of the equator. The end of the wave season coincided with the propagation past the array of a large intraseasonal Kelvin wave.

Corresponding author address: Dr. Robert H. Weisberg, Department of Marine Science, University of South Florida, 140 Seventh Avenue South, St. Petersburg, FL 33701-5016.

Email: weisberg@marine.usf.edu

Abstract

Ocean velocity data from an array of subsurface moorings deployed from May 1990 to June 1991 during the Tropical Instability Wave Experiment are used to study the energetics of planetary waves in the vicinity of the equator at 140°W. Such waves, observed from August to December 1990, were initiated by barotropic instability arising primarily from the cyclonic shear region of the South Equatorial Current and Equatorial Undercurrent just north of the equator. Subsequently, local barotropic production continued to maintain and modulate these tropical instability waves through a combination of cyclonic shear and meridional velocity component divergence just north of the equator. The end of the wave season coincided with the propagation past the array of a large intraseasonal Kelvin wave.

Corresponding author address: Dr. Robert H. Weisberg, Department of Marine Science, University of South Florida, 140 Seventh Avenue South, St. Petersburg, FL 33701-5016.

Email: weisberg@marine.usf.edu

Save