Journal of Oceanography

, 65:737 | Cite as

Water mass variability in the western North Pacific detected in a 15-year eddy resolving ocean reanalysis

  • Yasumasa Miyazawa
  • Ruochao Zhang
  • Xinyu Guo
  • Hitoshi Tamura
  • Daisuke Ambe
  • Joon-Soo Lee
  • Akira Okuno
  • Hiroshi Yoshinari
  • Takashi Setou
  • Kosei Komatsu
Original Articles

Abstract

This paper describes a reanalysis of the variability of water mass properties and currents in the western North Pacific using an ocean forecast system, Japan Coastal Ocean Predictability Experiment 2 (JCOPE2), to provide the basic description and information about the quality for data users. We have created the reanalysis data with high horizontal resolution of 1/12° to describe the oceanic variability associated with the Kuroshio-Kuroshio Extension, the Oyashio, and the mesoscale eddies from 1993 to 2007. The products made by an eddy-resolving ocean model combined with the three-dimensional variational data assimilation well reproduced the mean water mass property in the western North Pacific and the interannual variations of the Kuroshio-Kuroshio Extension and the Oyashio coastal branch. From the reanalysis data, we found that both the mean kinetic energy of the Kuroshio Extension axis at the first meandering crest and southward intrusion of the Oyashio coastal branch were closely related with the horizontal distribution of both the Oyashio Water and North Pacific Intermediate Water within the appropriate interannual time scale. The reanalysis data also indicated that the north-south migration of the Kuroshio Extension associated with its regime transitions affected the decadal modulation of the Subtropical Mode Water formation in the recirculation gyre of the Kuroshio Extension.

Keywords

Data assimilation reanalysis eddy-resolving model western North Pacific North Pacific Intermediate Water (NPIW) mode water Kuroshio Oyashio Mixed Water Region 

References

  1. Ambe, D., S. Imawaki, H. Uchida and K. Ichikawa (2004): Estimating the Kuroshio axis south of Japan using combination of satellite altimetry and drifting buoys. J. Oceanogr., 60, 375–382.CrossRefGoogle Scholar
  2. Bloom, S. C., L. L. Takacs, A. M. da Silva and D. Ledvina (1996): Data assimilation using Increment Analysis Updates. Mon. Wea. Rev., 124, 1256–1271.Google Scholar
  3. Boris, J. P. and D. L. Book (1973): Flux-corrected transport I: SHASTA, a fluid transport algorithm that works. J. Comput. Phys., 11, 38–69.CrossRefGoogle Scholar
  4. Boyer, T. P., J. I. Antonov, H. E. Garcia, D. R. Johnson, R. A. Locarnini, A. V. Mishonov, M. T. Pitcher, O. K. Baranova and I. V. Smolyar (2006): World Ocean Database 2005. NOAA Atlas NESDIS 60, Ed. by S. Levitus, U.S. Government Printing Office, Washington, D.C., 190 pp., DVDs.Google Scholar
  5. Carton, J. A. and A. Santorelli (2008): Global decadal upper-ocean heat content as viewed in nine analyses. J. Climate, 21, 6015–6035.CrossRefGoogle Scholar
  6. Conkright, M. E., J. I. Antonov, O. Baranova, T. P. Boyer, H. E. Garcia, R. Gelfeld, D. Johnson, R. A. Locarnini, P. P. Murphy, T. D. O’Brien, I. Smolyar and C. Stephens (2002): World Ocean Database 2001, Volume 1: Introduction. NOAA Atlas NESDIS 42, ed. by S. Levitus, U.S. Government Printing Office, Washington, D.C., 167 pp.Google Scholar
  7. Daley, R. (1991): Atmospheric Data Analysis. Cambridge University Press, New York, 472 pp.Google Scholar
  8. Ebuchi, N., Y. Fukamachi, K. Ohshima, K. Shirasawa, M. Ishikawa, T. Takatsuka, T. Daibo and M. Wakatsuchi (2006): Observation of the Soya Warm Current using HF Ocean Radar. J. Oceanogr., 62, 47–61.CrossRefGoogle Scholar
  9. Ezer, T. and G. L. Mellor (1994): Continuous assimilation of Geosat altimeter data into a three-dimensional primitive equation Gulf Stream model. J. Phys. Oceanogr., 24, 832–847.CrossRefGoogle Scholar
  10. Feder, T. (2000): Argo begins systematic global probing of the upper oceans. Phys. Today, 53, DOI:10.1063/1.1292477.Google Scholar
  11. Fujii, Y. and M. Kamachi (2003): A reconstruction of observed profiles in the sea east of Japan using vertical coupled temperature-salinity EOF modes. J. Oceanogr., 59, 173–186.CrossRefGoogle Scholar
  12. Griffies, S. M. and R. W. Hallberg (2000): Biharmonic friction with a Smagorinsky-like viscosity for use in large-scale eddy-permitting ocean models. Mon. Wea. Rev., 128, 2935–2946.CrossRefGoogle Scholar
  13. Guo, X., H. Hukuda, Y. Miyazawa and T. Yamagata (2003): A triply nested ocean model simulating the Kuroshio—Roles of horizontal resolution on JEBAR—. J. Phys. Oceanogr., 33, 146–169.CrossRefGoogle Scholar
  14. Hasunuma, K. (1978): Formation of the intermediate salinity minimum in the northwestern Pacific Ocean. Bull. Ocean Res. Inst., Univ. of Tokyo, 9, 47 pp.Google Scholar
  15. Hinada, T. (1996): Seasonal variation and long-term trends of the oceanographic conditions along a fixed hydrographic line crossing the Kuroshio in the East China Sea. Oceanogr. Mag., 45, 9–32.Google Scholar
  16. Ichikawa, H., H. Nakamura, A. Nishina and M. Higashi (2004): Variability of northeastward current southeast of northern Ryukyu Islands. J. Oceanogr., 60, 351–363.CrossRefGoogle Scholar
  17. Imawaki, S., H. Uchida, H. Ichikawa, M. Fukasawa, S. Umatani and ASUKA Group (2001): Satellite altimeter monitoring the Kuroshio transport south of Japan. Geophys. Res. Lett., 28(1), 17–20.CrossRefGoogle Scholar
  18. Ishizaki, H. and I. Ishikawa (2004): Simulation of formation and spreading of salinity minimum associated with NPIW using a high-resolution model. J. Oceanogr., 60, 463–485.CrossRefGoogle Scholar
  19. Japan Meteorological Agency (2006): ’2.2.3 Oyashio’. In Japan Meteorological Agency Comprehensive Oceanographic Information (in Japanese). http://www.data.kishou.go.jp/kaiyou/shindan/sougou/pdf/S22_2.2.3.pdf
  20. Kagimoto, T., Y. Miyazawa, X. Guo and H. Kawajiri (2008): High resolution Kuroshio forecast system—Description and its applications—. p. 209–234. In High Resolution Numerical Modeling of the Atmosphere and Ocean, ed. by W. Ohfuchi and K. Hamilton, Springer, New York.CrossRefGoogle Scholar
  21. Kalnay, E. and Coauthors (1996): The NCEP/NCAR 40-year reanalysis project. Bull. Amer. Meteor. Soc., 77, 437–471.CrossRefGoogle Scholar
  22. Kuragano, T. and M. Kamachi (1999): Global statistical space-time scales of oceanic variability estimated from the TOPEX/POSEIDON altimetry data. J. Geophys. Res., 105, 955–974.CrossRefGoogle Scholar
  23. Masuzawa, J. (1969): Subtropical Mode Water. Deep-Sea Res., 16, 463–472.Google Scholar
  24. McCalpin, J. D. (1994): A comparison of second-order and fourth-order pressure gradient algorithms in a sigma coordinate ocean model. Int. J. Num. Methods Fluids, 18, 361–383.CrossRefGoogle Scholar
  25. Mellor, G., T. Ezer and L.-Y. Oey (1994): The pressure gradient conundrum of sigma coordinate ocean models. J. Atmos. Oceanic Technol., 11, 1126–1134.CrossRefGoogle Scholar
  26. Mellor, G. L., S. Hakkinen, T. Ezer and R. Patchen (2002): A generalization of a sigma coordinate ocean model and an intercomparison of model vertical grids. p. 55–72. In Ocean Forecasting: Conceptual Basis and Applications, ed. by N. Pinardi and J. D. Woods, Springer, New York.Google Scholar
  27. Mitsudera, H., B. Taguchi, Y. Yoshikawa, H. Nakamura, T. Waseda and T. Qu (2004): Numerical study on the Oyashio water pathways in the Kuroshio-Oyashio Confluence. J. Phys. Oceanogr., 34, 1174–1196.CrossRefGoogle Scholar
  28. Miyao, T. and K. Ishikawa (2003): Formation, distribution and volume transport of the North Pacific Intermediate Water studied by repeat hydrographic observations. J. Oceanogr., 59, 905–919.CrossRefGoogle Scholar
  29. Miyazawa, Y. (2007): Development of numerical ocean forecasting technique—Kuroshio, Oyashio, and the Indian Ocean—. Suiro (Hydorology), 142, 22–34 (in Japanese).Google Scholar
  30. Miyazawa, Y., X. Guo and T. Yamagata (2004): Roles of mesoscale eddies in the Kuroshio paths. J. Phys. Oceanogr., 34, 2203–2222.CrossRefGoogle Scholar
  31. Miyazawa, Y., S. Yamane, X. Guo and T. Yamagata (2005): Ensemble forecast of the Kuroshio meandering. J. Geophys. Res., 110, C10026, doi:10.1029/2004JC002426.CrossRefGoogle Scholar
  32. Miyazawa, Y., T. Kagimoto, X. Guo and H. Sakuma (2008a): The Kuroshio large meander formation in 2004 analyzed by an eddy-resolving ocean forecast system. J. Geophys. Res., 113, C10015, doi:10.1029/2007JC004226.CrossRefGoogle Scholar
  33. Miyazawa, Y., K. Komatsu and T. Setou (2008b): Nowcast skill of the JCOPE2 ocean forecast system in the Kuroshio-Oyashio mixed water region. J. Marine Meteorol. Society (Umi to Sora), 84, 85–91 (in Japanese with English abstract and figure captions).Google Scholar
  34. Mizuno, K. and W. B. White (1983): Annual and interannual variability in the Kuroshio Current system. J. Phys. Oceanogr., 13, 1847–1867.CrossRefGoogle Scholar
  35. Nakano, T., I. Kaneko, M. Endoh and M. Kamachi (2005): Interannual and decadal variabilities of NPIW salinity minimum core observed along JMA’s hydrographic repeat sections. J. Oceanogr., 61, 681–697.CrossRefGoogle Scholar
  36. Oey, L-.Y. and P. Chen (1992): A nested-grid ocean model: with application to the simulation of meanders and eddies in the Norwegian Coastal Current. J. Geophys. Res., 97, 20,063–20,086.Google Scholar
  37. Qiu, B. and S. Chen (2006): Decadal variability in the formation of the North Pacific Subtropical Mode Water: Oceanic versus atmospheric control. J. Phys. Oceanogr., 36, 1365–1380.CrossRefGoogle Scholar
  38. Qiu, B., S. Chen and P. Hacker (2007): Effect of mesoscale eddies on Subtropical Mode Water variability from the Kuroshio Extension System Study (KESS). J. Phys. Oceanogr., 37, 982–1000.CrossRefGoogle Scholar
  39. Reid, J. L.,Jr. (1965): Intermediate waters of the Pacific Ocean. The Johns Hopkins Oceanographic Studies, 5, 96 pp.Google Scholar
  40. Shikama, N. (1994): Current measurement in the Tsugaru Strait using bottom-mounted ADCPs. Kaiyo Monthly, 26, 815–818 (in Japanese).Google Scholar
  41. Shimizu, Y., T. Iwao, I., Yasuda, S. Ito, T. Watanabe, K. Uehara, N. Shikama and T. Nakano (2004): Formation process of North Pacific Intermediate Water revealed by profiling floats set to drift on 26.7σϑ isopycnal surface. J. Oceanogr., 60, 453–46CrossRefGoogle Scholar
  42. Storch, H. and F. Zwiers (1999): Statistical Analysis in Climate Research. Cambridge University Press, Cambridge, 484 pp.Google Scholar
  43. Suga, T. and K. Hanawa (1995a): The subtropical mode water circulation in the North Pacific. J. Phys. Oceanogr., 25, 958–970.CrossRefGoogle Scholar
  44. Suga, T. and K. Hanawa (1995b): Interannual variations of North Pacific Subtropical Mode Water in the 137°E section. J. Phys. Oceanogr., 25, 1012–1017.CrossRefGoogle Scholar
  45. Takikawa, T., J. H. Yoon and K. D. Cho (2005): The Tsushima warm current through Tsushima straits estimated from ferryboat ADCP data. J. Phys. Oceanogr., 35, 1154–1168.CrossRefGoogle Scholar
  46. Talley, L. D. (1993): Distribution and formation of North Pacific Intermediate Water. J. Phys. Oceanogr., 23, 517–537.CrossRefGoogle Scholar
  47. Tatebe, H. and I. Yasuda (2004): Oyashio southward intrusion and cross-gyre transport related to diapycnal upwelling in the Okhotsk Sea. J. Phys. Oceanogr., 34, 2327–2341.CrossRefGoogle Scholar
  48. Uchida, H. and S. Imawaki (2003): Eulerian mean surface velocity field derived by combing drifter and satellite altimeter data. Geophys. Res. Lett., 30, 1229, doi:10.1029/2002GL016445.CrossRefGoogle Scholar
  49. Uda, M. (1963): Oceanography of the subarctic Pacific region. J. Fish. Res. Board Can., 20, 119–179.Google Scholar
  50. Uehara, K., Y. Saito and K. Hori (2002): Paleotidal regime in the Changjiang (Yangtze) Estuary, the East China Sea, and the Yellow Sea at 6 ka and 10 ka estimated from a numerical model. Mar. Geol., 183, 179–192.CrossRefGoogle Scholar
  51. Uehara, K., S. Ito, H. Miyake, I. Yasuda, Y. Shimizu and T. Watanabe (2004): Absolute volume transports of the Oyashio referred to moored current meter data crossing the OICE. J. Oceanogr., 60, 397–409.CrossRefGoogle Scholar
  52. Usui, N., S. Ishizaki, Y. Fujii, H. Tsujino, T. Yasuda and M. Kamachi (2006): Meteorological Research Institute multivariate ocean variational estimation (MOVE) system: Some early results. Adv. Space Res., 37, 806–822, doi:10.1016/j.asr.2005.09.022.CrossRefGoogle Scholar
  53. Wang, Y. H., S. Jan and D. P. Wang (2003): Transports and tidal current estimates in the Taiwan Strait from shipboard ADCP observations (1999–2001). Estuar., Coast. Shelf Sci., 57, 193–199.CrossRefGoogle Scholar
  54. Yasuda, I. (1997): The origin of the North Pacific Intermediate Water. J. Geophys. Res., 102, 893–909.CrossRefGoogle Scholar
  55. Yasuda, I. (2003): Hydrographic structure and variability in the Kuroshio-Oyashio transition area. J. Oceanogr., 59, 389–402.CrossRefGoogle Scholar
  56. Yasuda, I., K. Okuda and Y. Shimizu (1996): Distribution and modification of the North Pacific Intermediate Water in the Kuroshio-Oyashio Interfrontal zone. J. Phys. Oceanogr., 26, 448–465.CrossRefGoogle Scholar
  57. Yoshida, K. (1964): A note on the variations of the Kuroshio during recent years. Bull. Jpn. Soc. Fish Oceanogr., 5, 66–69 (in Japanese).Google Scholar
  58. Yoshinari, H., I. Yasuda and M. Ikeda (2004): Meridional transport of North Pacific Intermediate Water across 37°N based on an objective analysis of lowered acoustic Doppler current profiler data. J. Geophys. Res., 109, C02023, doi:10.1029/2003JC001815.CrossRefGoogle Scholar
  59. Yoshinari, H., T. Setou, A. Okuno, D. Ambe, K. Komatsu, Y. Miyazawa and FRA-JCOPE group (2008): Impact evaluation of Argo data for reproducibility of FRA-JCOPE. J. Marine Meteorol. Society (Umi to Sora), 84, 77–84 (in Japanese with English abstract and figure captions).Google Scholar
  60. Zhu, X.-H., I.-S. Han, J.-H. Park, H. Ichikawa, K. Murakami, A. Kaneko and A. Ostrovskii (2003): The northeastward current southeast of Okinawa Island observed during November 2000 to August 2001. Geophys. Res. Lett., 30(2), 1071, doi:10.1029/2002GL015867.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Yasumasa Miyazawa
    • 1
  • Ruochao Zhang
    • 1
  • Xinyu Guo
    • 1
    • 2
  • Hitoshi Tamura
    • 1
  • Daisuke Ambe
    • 3
  • Joon-Soo Lee
    • 3
  • Akira Okuno
    • 3
  • Hiroshi Yoshinari
    • 3
  • Takashi Setou
    • 3
  • Kosei Komatsu
    • 3
    • 4
  1. 1.Research Institute for Global ChangeJapan Agency for Marine-Earth Science and TechnologyYokohama, KanagawaJapan
  2. 2.Center for Marine Environmental StudiesEhime UniversityMatsuyama, EhimeJapan
  3. 3.Fisheries Research AgencyNational Research Institute of Fisheries ScienceYokohama, KanagawaJapan
  4. 4.Graduate School of Frontier SciencesThe University of TokyoKashiwa, ChibaJapan

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