Jets and Waves in the Pacific Ocean
Analysis of the output of high-resolution ocean models reveals the presence of a class of flow structures that is intermediate in scale between the large-scale circulation and the geostrophic eddy field. These structures are coherent over considerably long zonal distances and have a relatively small meridional scale of 300–500km. They take the form of either quasipersistent multiple jets or long-crested Rossby waves with high-meridional and low-zonal wavenumbers. Here we discuss the properties of these features in the Pacific Ocean, possible mechanisms for their formation, and the potential impact on the transport of tracers.
KeywordsRossby Wave Phase Speed Zonal Component Zero Contour Brazil Basin
Unable to display preview. Download preview PDF.
- Dickson, R. R. (1983) Global summaries and intercomparisons: flow statistics from long-term current meter moorings. In Eddies in Marine Science, Robinson, A. R. (ed.), Springer, Berlin.Google Scholar
- Glazman, R. E., and P. B. Weichman (2005) Meridional component of oceanic Rossby wave propagation. Dynamics Atoms. Oceans, 38, 173-193.Google Scholar
- Hogg, N., and B. Owens (1999) Direct measurement of the deep circulation within the Brazil basin. Deep-Sea Res., 46, 335-353.Google Scholar
- Masumoto, Y., et al. (2004) A fifty-year eddy-resolving simulation of the world ocean: preliminary outcomes from OFES (OGCM for the Earth Simulator). J. Earth Simul. 1, 35-56.Google Scholar
- Maximenko N. A., and B. Bang (2005) Alternating zonal jets observed in the upper ocean. IPRC Annual Symposium, Univeristy of Hawaii.Google Scholar
- Munk, W. H. (1950) On the wind-driven ocean circulation. J. Meteorol., 7, 79-93.Google Scholar
- Pedlosky J. (1998) Ocean Circulation Theory, Springer Berlin. 453 pp.Google Scholar
- Rhines, P. B. (1994) Jets. Chaos, 4, 417-443.Google Scholar
- Speer K. G., M. E. Maltrud, and A. M. Thurnherr (2002) A global view of dispersion above the Mid-ocean Ridge. In Energy and Mass Transfer in Marine Hydrothermal Systems, Halbach, P. E. V. Tunnicliffe, and J. R. Hein (eds.), Dahlem Workshop Report, 89, Dahlem Univerisity Press, Berlin.Google Scholar
- Stommel., H. (1948) The westward intensification of wind-driven ocean currents, Trans. Am. Geo- phys. Union, 99, 202-206.Google Scholar
- Sukoriansky, S., B. Galperin, and N. Dikovskaya (2002) Universal spectrum of two-dimensional turbulence on a rotating sphere and some basic features of atmospheric circulation on giant planets. Phys. Rev. Lett., 89, 124 501.Google Scholar