Unstable frontal waves along the Kuroshio Extension with low-potential vorticity intermediate Oyashio water

Journal of Physical Oceanography

Volumn 38, Issue 10, 2008, Pages 2308-2321

  Kouketsu, Shinya ^a   Yasuda, Ichiro ^b  

^a JAPAN AGENCY FOR MARINE EARTH SCIENCE AND TECHNOLOGY   (Japan)

^b UNIVERSITY OF TOKYO   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

LINEAR STABILITY ANALYSIS; MATHEMATICAL MODELS; VORTICITY; WATER ANALYSIS; WAVEGUIDES;

BAROCLINIC WAVES; FRONTAL WAVES; HORIZONTAL VARIATIONS; INTERMEDIATE LAYERS; KUROSHIO EXTENSIONS; LINEAR STABILITIES; MAIN STREAMS; PHASE SPEEDS; POTENTIAL VORTICITIES; PRIMITIVE EQUATIONS; PV GRADIENTS; UNSTABLE WAVES; VELOCITY FIELDS;

OCEAN CURRENTS;

BAROCLINIC WAVE; POTENTIAL VORTICITY; STRATIFICATION; WAVE PROPAGATION; WAVELENGTH;

KUROSHIO EXTENSION; PACIFIC OCEAN;

EID: 57849129338     PISSN: 00223670     EISSN: None     Source Type: Journal    
DOI: 10.1175/2008JPO3814.1     Document Type: Article

References (27)

1. Bower, A. S., 1989: Potential vorticity balances and horizontal divergence along particle trajectories in Gulf Stream meanders east of Cape Hatteras. J. Phys. Oceanogr., 19, 1669-1681.
2. Bower, A. S., 1991: A simple kinematic mechanism for mixing fluid parcels across a meandering jet. J. Phys. Oceanogr., 21, 173-180.
3. Bower, A. S., and T. Rossby, 1989: Evidence of cross-frontal exchange processes in the Gulf Stream based on isopycnal RAFOS float data. J. Phys. Oceanogr., 19, 1177-1190.
4. Fujimura, M., and Y. Nagata, 1992: Mixing process in the Mixed Water Region and Kuroshio Extension Regions and modification of the Intermediate Kuroshio Water. Oceanogr. Mag., 42, 1-20.
5. Hirai, M., 1985: Satellite observation of characteristic features of frontal eddies in the vicinity of the Kuroshio front. Bull. Tohoku Reg. Fish. Res. Lab., 47, 69-78.
6. Hiroe, Y., I. Yasuda, K. Komatsu, K. Kawasaki, T. M. Joyce, and F. Bahr, 2002: Transport of North Pacific Intermediate Water in the Kuroshio-Oyashio interfrontal zone. Deep-Sea Res. II, 49, 5353-5364.
7. Kouketsu, S., I. Yasuda, and Y. Hiroe, 2005: Observation of frontal waves and associated salinity minimum formation along the Kuroshio Extension. J. Geophys. Res., 110, C08011, doi:10.1029/ 2004JC002862.
8. Kouketsu, S., I. Yasuda, and Y. Hiroe, 2007: Three-dimensional structure of frontal waves and associated salinity minimum formation along the Kuroshio Extension. J. Phys. Oceanogr., 37, 644-656.
9. Lee, T., and P. Cornillon, 1996: Propagation and growth of Gulf Stream meanders between 75° and 45°W. J. Phys. Oceanogr., 26, 225-241.
10. Lozier, M. S., and D. Bercovici, 1992: Particle exchange in an unstable jet. J. Phys. Oceanogr., 22, 1506-1516.
11. Masujima, M., I. Yasuda, Y. Hiroe, and T. Watanabe, 2003: Transport of the Oyashio water across subarctic front into the Kuroshio-Oyashio interfrontal zone and formation of NPIW. J. Oceanogr., 59, 855-869.
12. McCreary, J. P., and Z. Yu, 1992: Equatorial dynamics in a 2 1/2-layer model. Prog. Oceanogr., 29, 61-132.
13. Mizuno, K., 1985: Some examples of short term fluctuations in the Kuroshio Extension detected by IR imagery. Bull. Tohoku Reg. Fish. Res. Lab., 47, 59-68.
14. Moore, G. W. K., and W. R. Peltier, 1987: Cyclogenesis in frontal zones. J. Atmos. Sci., 44, 384-409.
15. Okuda, K., I. Yasuda, Y. Hiroe, and Y. Shimizu, 2001: Structure of subsurface intrusion of the Oyashio water into the Kuroshio Extension and formation process of the North Pacific Intermediate Water. J. Oceanogr., 57, 121-140.
16. Orlanski, I., 1969: The influence of bottom topography on the stability of jets in a baroclinic fluid. J. Atmos. Sci., 26, 1216-1232.
17. Pedlosky, J., 1987: Geophysical Fluid Dynamics. 2nd ed. Springer-Verlag, 710 pp.
18. Qui, B., and S. Chen, 2005: Variability of the Kuroshio Extension jet, recirculation gyre, and mesoscale eddies on decadal time scales. J. Phys. Oceanogr., 35, 2090-2103.
19. Shi, X. B., and L. P. Røed, 1999: Frontal instabilities in a twolayer, primitive equation ocean model. J. Phys. Oceanogr., 29, 948-968.
20. Shimizu, Y., I. Yasuda, and S. Ito, 2001: Distribution and circulation of the coastal Oyashio intrusion. J. Phys. Oceanogr., 31, 1561-1578.
21. Song, T., and T. Rossby, 1997: Analysis of Lagrangian potential vorticity balance and lateral displacement of water parcels in Gulf Stream meanders. J. Phys. Oceanogr., 27, 325-339.
22. Song, T., and T. Rossby, and E. Carter, 1995: Lagrangian studies of fluid exchange between the Gulf Stream and surrounding waters. J. Phys. Oceanogr., 25, 46-63.
23. Suga, T., K. Hanawa, and Y. Toba, 1989: Subtropical mode water in the 137°E section. J. Phys. Oceanogr., 19, 1605-1618.
24. Talley, L. D., 1997: North Pacific intermediate transports in the Mixed Water Region. J. Phys. Oceanogr., 27, 1795-1803.
25. Yasuda, I., 1997: The origin of the North Pacific Intermediate Water. J. Geophys. Res., 102, 893-909.
26. Yasuda, I., K. Okuda, and Y. Shimizu, 1996: Distribution and modification of North Pacific Intermediate Water in the Kuroshio-Oyashio interfrontal zone. J. Phys. Oceanogr., 26, 448-465.
27. Yasuda, I., S. Kouketsu, K. Katsumata, M. Ohiwa, Y. Kawasaki, and A. Kusaka, 2002: Influence of Okhotsk Sea Intermediate Water on the Oyashio and North Pacific Intermediate Water. J. Geophys. Res., 107, 3237, doi:10.1029/2001JC001037.