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Ocean Dynamics

, Volume 62, Issue 1, pp 31–44 | Cite as

Existence of eddies at crossroad of the Indonesian seas

  • Aditya R. Kartadikaria
  • Yasumasa Miyazawa
  • Kazuo Nadaoka
  • Atsushi Watanabe
Article

Abstract

An eddy-resolving Indo-Pacific ocean circulation model was applied to highlight the behavior of eddies throughout the Indonesian seas. The complexity of the topography and coastline at the entrance of the Makassar Strait induce an eddy-type throughflow, instead of a straightforward flow. A sill and a narrow passage in the Makassar strait creates a barrier and impedes the continuation of eddies from the Pacific ocean, but the existence of a steep deep basin (>500 m depth) between the Java and Flores seas indicates a possible area for eddies. Based on our numerical results, we described the presence of a unique eddy structure north of Lombok Island, which we designated the “Lombok Eddy” and verified it by performing a drifter release field experiment and reviewing monthly mean climatology data from the World Ocean Atlas 2001 and XBT PX2 track data. NCEP/NCAR reanalysis, satellite observation data, and mixed layer depth analysis were also used to confirm these processes. By analyzing numerical simulation results and available temperature datasets, two additional eddies were found. All eddies form primarily due to eastward local winds correlated with seasonal monsoon winds during the austral summer. These eddies vary synchronously at an interannual time scale. Together, they are referred to as the Lombok Eddy Train (LET), which affects the surface layer down to a depth of 60 m, and the intensity of the eddy system is strongly affected by mixed layer depth variability from December to February.

Keywords

Lombok eddy train Wind stress February Upwelling-downwelling Cyclonic-anticyclinic 

Notes

Acknowledgements

This work was funded by the Global Environment Research Fund (F-082) of the Ministry of the Environment, Japan, and a Grant-in-Aid for Scientific Research (A) (no. 18254003 and no. 21254002) from the JSPS (Japan Society for the Promotion of Science). The authors gratefully acknowledge the joint research cooperation, help, and support from the Research Center for Oceanography-Indonesian Institute of Sciences, directed by Prof. Suharsono, and the Research Center for Marine and Coastal Resources-Ministry of Marine Affairs and Fisheries of Indonesia, directed by Dr. Budi Sulistiyo. The authors gratefully acknowledge the support from Novi S. Adi and Adi Purwandhana during drifters release experiment. We benefited considerably from facilities offered by the JAMSTEC Yokohama office, which supported all of the running processes on their two supercomputers (SX-8R and SGI Altix4700) and provided timeseries validation data. The Indo-Pacific code uses the code of JCOPE2 developed by the JCOPE group. The first author has been supported by the scholarship for foreign students offered by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The authors gratefully acknowledge the useful comments and suggestions from the weekly JCOPE group meeting and the anonymous reviewers.

References

  1. Arief D, Murray SP (1996) Low-frequency fluctuations in the Indonesian throughflow through Lombok Strait. J Geophys Res 101(C5):12455–12464CrossRefGoogle Scholar
  2. Barber PH, Palumbi SR, Erdmann MV, Moosa MK (2000) A marine Wallace’s line? Nature 17; 406(6797):692–693CrossRefGoogle Scholar
  3. Broecker WS (1991) The great ocean conveyor. Oceanography 4:79–89Google Scholar
  4. Burnett WH, Kamenkovich VM, Gordon AL, Mellor GL (2003) The Pacific/Indian Ocean pressure difference and its influence on the Indonesian Seas circulation: part I-the study with specified total transports. J Mar Res 61; 5:577–611CrossRefGoogle Scholar
  5. Cresswell G (1995) A cyclonic eddy north of Lombok. Mar Res Indones 29:13–17Google Scholar
  6. Gordon AL, Susanto RD, Vranes K (2003) Cool Indonesian throughflow as a consequence of restricted surface layer flow. Nature 425(6960):824–828CrossRefGoogle Scholar
  7. Inoue M, Welsh SE (1993) Modeling seasonal variability in the wind-driven upper-layer circulation in the Indo-Pacific region. J Phys Oceanogr 23:1411–1436CrossRefGoogle Scholar
  8. Kagimoto T, Miyazawa Y, Guo X, Kawajiri H (2008) High resolution Kuroshio forecast system—description and its applications. In: Ohfuchi W, Hamilton K (eds) High resolution numerical modeling of the atmosphere and ocean. Springer, New York, pp 209–234CrossRefGoogle Scholar
  9. Kalnay E, Kanamitsu M, Kistler R, Collins W, Deaven D, Gandin L, Iredell M, Saha S, White G, Woolen J, Zhu Y, Chelliah M, Ebisuzaki W, Higgins W, Janowiak J, Mo KC, Ropelewski C, Wang J, Leetma A, Reynolds R, Jenne R, Joseph D (1996) The NCEP/NCAR 40-year reanalysis project. Bull Am Meteorol Soc 77:437–471CrossRefGoogle Scholar
  10. Kashino Y, Watanabe H, Herunadi B, Aoyama M, Hartoyo D (1999) Current variability at the Pacific entrance of the Indonesian Throughflow. J Geophys Res 104(C5):11021–11035CrossRefGoogle Scholar
  11. Lukas R, Yamagata T, McCreary JP (1996) Pacific low-latitude western boundary currents and the Indonesian throughflow. J Geophys Res 101:12209–12216CrossRefGoogle Scholar
  12. Masumoto Y, Yamagata T (1996) Seasonal variations of the Indonesian throughflow in a general ocean circulation model: Pacific low-latitude western boundary currents and the Indonesian throughflow. J Geophys Res 101:12287–12294CrossRefGoogle Scholar
  13. Masumoto Y, Kagimoto T, Yoshida M, Fukuda M, Hirose N, Yamagata T (2001) Intraseasonal eddies in the sulawesi sea simulated in an ocean general circulation model. Geophys Res Lett 28(8):1631–1634CrossRefGoogle Scholar
  14. Masumoto Y, Sasaki H, Kagimoto T, Komori N, Ishida A, Sasai Y, Miyama T, Motoi T, Mitsudera H, Takahashi K, Sakuma H, Yamagata T (2004) A fifty-year eddy-resolving simulation of the world ocean. Preliminary outcomes of OFES (OGCM for the Earth Simulator). J Earth Simulator 1:35–56Google Scholar
  15. Mellor GL, Hakkinen S, Ezer T, Patchen R (2002) A generalization of a sigma coordinate ocean model and an intercomparison of model vertical grids. In: Pinardi N, Woods JD (eds) Ocean forecasting: conceptual basis and applications. Springer, Berlin, pp 55–72Google Scholar
  16. Miyazawa Y, Yamane S, Guo X, Yamagata T (2005) Ensemble forecast of the Kuroshio meandering, 2005. J Geophys Res 110:C10026. doi: 10.1029/2004JC002426 CrossRefGoogle Scholar
  17. Miyazawa Y, Kagimoto T, Guo X, Sakuma H (2008) 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
  18. Miyazawa Y, Kagimoto T, Guo X, Sakuma H (2009a) 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
  19. Miyazawa Y, Zhang R, Guo X, Tamura H, Ambe D, Lee J-S, Okuno A, Yoshinari H, Setou T, Komatsu K (2009b) Water mass variability in the western North Pacific detected in a 15-year eddy resolving ocean reanalysis. J Oceanogr 65:737–756CrossRefGoogle Scholar
  20. Molcard R, Ilahude AG (1996) The Indo-Pacific throughflow in the Timor Passage. J Geophys Res 101:12411–12420CrossRefGoogle Scholar
  21. Paulson CA, Simpson JJ (1977) Irradiance measurements in the upper ocean. J Phys Oceanogr 7:952–956CrossRefGoogle Scholar
  22. Qiu B, Mao M, Kashino Y (1999) Intraseasonal variability in the Indo-Pacific Throughflow and the regions surrounding the Indonesian Seas. J Phys Oceanogr 29:1599–1618CrossRefGoogle Scholar
  23. Sprintall J, Gordon AL, Murtugudde R, Susanto RD (2000) A semiannual Indian Ocean forced Kelvin wave observed in the Indonesian seas in May 1997. J Geophys Res Oceans 105(C7):17217–17230CrossRefGoogle Scholar
  24. Susanto RD, Gordon AL (2005) Velocity and transport of Indonesian throughflow in Makassar Strait. J Geophys Res 110:C01005. doi: 10.1029/2004JC002425 CrossRefGoogle Scholar
  25. Susanto RD, Gordon AL, Sprintall J, Herunadi B (2000) Intraseasonalvariability and tides in Makassar Strait. Geophys Res Lett 27:1499–1502CrossRefGoogle Scholar
  26. Susanto RD, Gordon AL, Zheng Q (2001) Upwelling along the coasts of Java and Sumatra and its relation to ENSO. Geophys Res Lett 28(8):1599–1602CrossRefGoogle Scholar
  27. Susanto RD, Mitnik L, Zheng Q (2005) Ocean internal waves observed in the Lombok Strait. Oceanography 18(4):80–87CrossRefGoogle Scholar
  28. Susanto RD, Gordon AL, Sprintall J (2007) Observation and proxies of the surface layer throughflow in the Lombok Strait. J Geophys Res 112(C3):C03S92. doi: 10.1029/2006JC003790 CrossRefGoogle Scholar
  29. Tozuka T, Kagimoto T, Masumoto Y, Yamagata T (2001) Simulated multiscale variations in the western tropical pacific: the Mindanao Dome revisited. J Phys Oceanogr 32:1338–1359CrossRefGoogle Scholar
  30. Visser WP, van Groesen E, Andonowati A, van Beckum FPH, Klopman G (2004) On the generation of internal waves in Lombok Strait through Kelvin-Helmholtz instability. MSc, thesis Applied Mathematics, Department of Applied Mathematics, University of TwenteGoogle Scholar
  31. Yamagata T, Mizuno K, Masumoto Y (1996) Seasonal variations in the equatorial Indian Ocean and their impact on the Lombok throughflow. J Geophys Res 101(C5):12465–12473CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Aditya R. Kartadikaria
    • 1
  • Yasumasa Miyazawa
    • 2
  • Kazuo Nadaoka
    • 1
  • Atsushi Watanabe
    • 1
  1. 1.Department of Mechanical and Environmental InformaticsTokyo Institute of TechnologyTokyoJapan
  2. 2.Research Institute for Global Change, Japan Agency for Marine-Earth Science and TechnologyYokohamaJapan

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