• An, H. S., , K-S. Shim, , and H-R. Shim, 1994: On the warm eddies in the southwestern part of the East Sea (the Japan Sea). J. Oceanol. Soc. Korea, 29 , 152163.

    • Search Google Scholar
    • Export Citation
  • Byun, S-K., 1989: Sea surface cold water near southeastern coast of Korea: Wind effect. J. Oceanol. Soc. Korea, 24 , 121131.

  • Cho, Y-K., , and K. Kim, 2000: Branching mechanism of the Tsushima Current in the Korea Strait. J. Phys. Oceanogr., 30 , 27882797.

  • Cushman-Roisin, B., , L. Pratt, , and E. Ralph, 1993: A general theory for equivalent barotropic thin jets. J. Phys. Oceanogr., 23 , 91103.

    • Search Google Scholar
    • Export Citation
  • Flierl, G. R., , and A. R. Robinson, 1984: On the time-dependent meandering of a thin-jet. J. Phys. Oceanogr., 14 , 412423.

  • Fox, D. N., , W. J. Teague, , C. N. Barron, , M. R. Carnes, , and C. M. Lee, 2002: The Modular Ocean Data Assimilation System (MODAS). J. Atmos. Oceanic Technol., 19 , 240252.

    • Search Google Scholar
    • Export Citation
  • Ichiye, T., , and K. Takano, 1988: Mesoscale eddies in the Sea of Japan. La Mer, 26 , 6979.

  • Isobe, A., 1997: The determination of the transport distribution of the Tsushima Warm Current around the Korea/Tsushima Straits. Cont. Shelf Res., 17 , 319336.

    • Search Google Scholar
    • Export Citation
  • Isoda, Y., 1994: Warm eddy movements in the eastern Japan Sea. J. Oceanogr., 50 , 115.

  • Isoda, Y., 1996: Interaction of a warm eddy with the coastal current at the eastern boundary area in the Tsushima Current region. Cont. Shelf Res., 16 , 11491163.

    • Search Google Scholar
    • Export Citation
  • Isoda, Y., , and S-I. Saitoh, 1993: The northward intruding eddy along the east coast of Korea. J. Oceanogr., 49 , 443458.

  • Katoh, O., 1994: Structure of the Tsushima Current in the southwestern Japan Sea. J. Oceanogr., 50 , 317338.

  • Kawabe, M., 1982: Branching of the Tsushima Current in the Japan Sea. Part I: Data analysis. J. Oceanogr. Soc. Japan, 38 , 95107.

  • Kim, C. H., , and K. Kim, 1983: Characteristics and origin of the cold water mass along the east coast of Korea. J. Oceanol. Soc. Korea, 18 , 7383.

    • Search Google Scholar
    • Export Citation
  • Kim, K., , S. J. Lyu, , Y-G. Kim, , B. H. Choi, , K. Taira, , H. T. Perkins, , W. J. Teague, , and J. W. Book, 2004: Monitoring volume transport through measurement of cable voltage across the Korea Strait. J. Atmos. Oceanic Technol., 21 , 671682.

    • Search Google Scholar
    • Export Citation
  • Lee, J. C., 1983: Variation of sea level and sea surface temperature associated with wind-induced upwelling in the southeast coast of Korea in summer. J. Oceanol. Soc. Korea, 18 , 149160.

    • Search Google Scholar
    • Export Citation
  • Lee, J. C., , and J. Y. Na, 1985: Structure of upwelling off the southeast coast of Korea. J. Oceanol. Soc. Korea, 20 , 619.

  • Lie, H-J., , S-K. Byun, , I. Bang, , and C-H. Cho, 1995: Physical structure of eddies in the southwestern East Sea. J. Korean Soc. Oceanogr., 30 , 170183.

    • Search Google Scholar
    • Export Citation
  • Matsuyama, M., , Y. Kurita, , T. Senjyu, , Y. Koike, , and T. Hayashi, 1990: The warm eddy observed east of Oki Islands in the Japan Sea. Umi Sora, 66 , 6775.

    • Search Google Scholar
    • Export Citation
  • Meinen, C. S., , and D. R. Watts, 2000: Vertical structure and transport on a transect across the North Atlantic Current near 42°N: Timeseries and mean. J. Geophys. Res., 105 , 2186921891.

    • Search Google Scholar
    • Export Citation
  • Mitchell, D. A., , M. Wimbush, , D. R. Watts, , and W. J. Teague, 2004: The residual GEM technique and its application to the southwestern Japan/East Sea. J. Atmos. Oceanic Technol., 21 , 18951909.

    • Search Google Scholar
    • Export Citation
  • Mitchell, D. A., , D. R. Watts, , M. Wimbush, , K. L. Tracey, , W. J. Teague, , J. W. Book, , M-S. Suk, , and J-H. Yoon, 2005: Upper circulation patterns in the Ulleung Basin. Deep-Sea Res., in press.

    • Search Google Scholar
    • Export Citation
  • Morimoto, A., , and T. Yanagi, 2001: Variability of sea surface circulation in the Japan Sea. J. Oceanogr., 57 , 113.

  • Morimoto, A., , T. Yanagi, , and A. Kaneko, 2000: Eddy field in the Japan Sea derived from satellite altimetric data. J. Oceanogr., 56 , 449462.

    • Search Google Scholar
    • Export Citation
  • Naganuma, K., 1977: The oceanographic fluctuations in the Japan Sea (in Japanese). Kaiyo Kagaku, 9 , 137141.

  • Naganuma, K., 1985: Fishing and oceanographic conditions in the Japan Sea (in Japanese). Umi Sora, 60 , 89103.

  • Nycander, J., , D. G. Dritschel, , and G. G. Sutyrin, 1993: The dynamics of long frontal waves in the shallow water equations. Phys. Fluids, A5 , 10891091.

    • Search Google Scholar
    • Export Citation
  • Pedlosky, J., 1981: The nonlinear dynamics of baroclinic wave ensembles. J. Fluid Mech., 102 , 169209.

  • Pratt, L. J., 1988: Meandering and eddy detachment according to a simple (looking) path equation. J. Phys. Oceanogr., 18 , 16271640.

  • Ralph, E. A., , and L. Pratt, 1994: Predicting eddy detachment for an equivalent barotropic thin jet. J. Nonlinear Sci., 4 , 355374.

  • Ramp, S. R., , F. L. Barr, , C. J. Ashjian, , and L. D. Talley, 2005: The upper-ocean circulation in the Ulleung Basin during June–July 1999. Deep-Sea Res., in press.

    • Search Google Scholar
    • Export Citation
  • Robinson, A. R., , and P. P. Niiler, 1967: The theory of free inertial jets. Part I: Path and structure. Tellus, 19 , 269291.

  • Seung, Y-H., 1974: A dynamic consideration on the temperature distribution in the east coast of Korea. J. Oceanol. Soc. Korea, 9 , 5258.

    • Search Google Scholar
    • Export Citation
  • Suda, K., , and K. Hidaka, 1932: The results of the oceanographical observations aboard R.M.S. Syunpu Maru in the southern part of the Sea of Japan in the summer of 1929 (in Japanese). J. Oceanogr. Imp. Mar. Obs., 3 , 291375.

    • Search Google Scholar
    • Export Citation
  • Sutyrin, G. G., , and I. G. Yushina, 1989: Numerical modeling of the formation, evolution, interaction and decay of isolated vortices. Mesoscale/Synoptic Coherent Structures in Geophysical Turbulence, J. C. J. Nihoul and B. M. Jamart, Eds., Elsevier, 50, 721–736.

    • Search Google Scholar
    • Export Citation
  • Tanioka, K., 1968: On the East Korean Warm Current (Tosen Warm Current). Oceanogr. Mag., 20 , 3138.

  • Teague, W. J., , G. A. Jacobs, , H. T. Perkins, , J. W. Book, , K-I. Chang, , and M-S. Suk, 2002: Low frequency current observations in the Korea Strait. J. Phys. Oceanogr., 32 , 16211641.

    • Search Google Scholar
    • Export Citation
  • Teague, W. J., , G. A. Jacobs, , D. A. Mitchell, , M. Wimbush, , and D. R. Watts, 2004: Decadal current variations in the southwestern Japan/East Sea. J. Oceanogr., 60 , 10231033.

    • Search Google Scholar
    • Export Citation
  • Teague, W. J., , P. A. Hwang, , G. A. Jacobs, , J. W. Book, , and H. T. Perkins, 2005a: Transport variability across the Korea/Tsushima Strait and the Tsushima Island wake. Deep-Sea Res., in press.

    • Search Google Scholar
    • Export Citation
  • Teague, W. J., and Coauthors, 2005b: Observed deep circulation in the Ulleung Basin. Deep-Sea Res., in press.

  • Uda, M., 1934: The results of simultaneous oceanographical investigations in the Japan Sea and its adjacent waters in May and June, 1932 (in Japanese). Japan Imp. Fish. Exp. Sta., 5 , 57190.

    • Search Google Scholar
    • Export Citation
  • Yoon, J-H., 1997: Trend of oceanography in the Japan Sea (in Japanese). Bull. Japan. Soc. Fish. Oceanogr., 61 , 300303.

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The Dok Cold Eddy

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  • 1 Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island
  • | 2 Naval Research Laboratory, Stennis Space Center, Mississippi
  • | 3 Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island
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Abstract

Current and temperature patterns in the Ulleung Basin of the Japan/East Sea are examined using acoustic travel-time measurements from an array of pressure-gauge-equipped inverted echo sounders moored between June 1999 and July 2001. The focus here is the formation and behavior of a persistent cold eddy observed south of Dok Island, referred to as the Dok Cold Eddy (DCE), and meandering of the Subpolar Front. The DCE is typically about 60 km in diameter and originates from the pinching off of a Subpolar Front meander between Ulleung and Dok Islands. After formation, the DCE dwells southwest of Dok Island for 1–6 months before propagating westward toward Korea, where it deflects the path of the East Korean Warm Current (EKWC). Four such DCE propagation events between January and June 2000 each deflected the EKWC, and after the fourth deflection the EKWC changed paths and flowed westward along the Japanese shelf as the “Offshore Branch” from June through November 2000. Beginning in March 2001, a deep, persistent meander of the Subpolar Front developed and oscillated with a period near 60 days, resulting in the deformation and northwestward displacement of the Ulleung Eddy. Satellite-altimeter data suggest that the Ulleung Eddy may have entered the northern Japan/East Sea. The evolution of this meander is compared with thin-jet nonlinear dynamics described by the modified Korteweg–deVries equation.

* Current affiliation: Naval Research Laboratory, Stennis Space Center, Mississippi

Corresponding author address: Douglas A. Mitchell, Meso- and Finescale Ocean Physics, Naval Research Laboratory, Stennis Space Center, MS 39529-5004. Email: dmitchell@nrlssc.navy.mil

Abstract

Current and temperature patterns in the Ulleung Basin of the Japan/East Sea are examined using acoustic travel-time measurements from an array of pressure-gauge-equipped inverted echo sounders moored between June 1999 and July 2001. The focus here is the formation and behavior of a persistent cold eddy observed south of Dok Island, referred to as the Dok Cold Eddy (DCE), and meandering of the Subpolar Front. The DCE is typically about 60 km in diameter and originates from the pinching off of a Subpolar Front meander between Ulleung and Dok Islands. After formation, the DCE dwells southwest of Dok Island for 1–6 months before propagating westward toward Korea, where it deflects the path of the East Korean Warm Current (EKWC). Four such DCE propagation events between January and June 2000 each deflected the EKWC, and after the fourth deflection the EKWC changed paths and flowed westward along the Japanese shelf as the “Offshore Branch” from June through November 2000. Beginning in March 2001, a deep, persistent meander of the Subpolar Front developed and oscillated with a period near 60 days, resulting in the deformation and northwestward displacement of the Ulleung Eddy. Satellite-altimeter data suggest that the Ulleung Eddy may have entered the northern Japan/East Sea. The evolution of this meander is compared with thin-jet nonlinear dynamics described by the modified Korteweg–deVries equation.

* Current affiliation: Naval Research Laboratory, Stennis Space Center, Mississippi

Corresponding author address: Douglas A. Mitchell, Meso- and Finescale Ocean Physics, Naval Research Laboratory, Stennis Space Center, MS 39529-5004. Email: dmitchell@nrlssc.navy.mil

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