Ocean Dynamics

, Volume 63, Issue 2–3, pp 243–263 | Cite as

On the dynamics of strait flows: an ocean model study of the Aleutian passages and the Bering Strait

  • Tal EzerEmail author
  • Lie-Yauw Oey
Part of the following topical collections:
  1. Topical Collection on the 4th International Workshop on Modelling the Ocean in Yokohama, Japan 21–24 May 2012


A high-resolution numerical ocean circulation model of the Bering Sea (BS) is used to study the natural variability of the BS straits. Three distinct categories of strait dynamics have been identified: (1) Shallow passages such as the Bering Strait and the Unimak Passage have northward, near barotropic flow with periodic pulses of larger transports; (2) wide passages such as Near Straits, Amukta Pass, and Buldir Pass have complex flow patterns driven by the passage of mesoscale eddies across the strait; and (3) deep passages such as Amchitka Pass and Kamchatka Strait have persistent deep return flows opposite in direction to major surface currents; the deep flows persist independent of the local wind. Empirical orthogonal function analyses reveal the spatial structure and the temporal variability of strait flows and demonstrate how mesoscale variations in the Aleutian passages influence the Bering Strait flow toward the Arctic Ocean. The study suggests a general relation between the barotropic and baroclinic Rossby radii of deformations in each strait, and the level of flow variability through the strait, independent of geographical location. The mesoscale variability in the BS seems to originate from two different sources: a remote origin from variability in the Alaskan Stream that enters the BS through the Aleutian passages and a local origin from the interaction of currents with the Bowers Ridge in the Aleutian Basin. Comparisons between the flow in the Aleutian passages and flow in other straits, such as the Yucatan Channel and the Faroe Bank Channel, suggest some universal topographically induced dynamics in strait flows.


Bering Sea Aleutian passages Numerical ocean modeling Flow–topography interaction Strait dynamics 



The research is supported by NOAA’s Office of Climate Programs, through grants to ODU (award NA08OAR4310613) and PU (award NA17RJ2612), as part of the project “Collaborative Research: Modeling Sea Ice-Ocean-Ecosystem Responses to Climate Changes in the Bering-Chukchi-Beaufort Seas with Data Assimilation of RUSALCA Measurements.” TE was partly supported by grants from NSF and NOAA. LYO is grateful to GFDL/NOAA, Princeton, where model computations were conducted.


  1. Aagaard K, Roach AT, Schumacher JD (1985) On the wind-driven variability of the flow through Bering Strait. J Geophys Res 90(C10):7213–7222CrossRefGoogle Scholar
  2. Bretherton CS, Smith C, Wallace JM (1992) An intercomparison of methods for finding coupled patterns in climate data. J Clim 5:541–560CrossRefGoogle Scholar
  3. Cenedese C, Whitehead JA, Ascarelli TA, Ohiwa M (2004) A dense current flowing down a sloping bottom in a rotating fluid. J Phys Oceanogr 34:188–203CrossRefGoogle Scholar
  4. Coachman LK, Aagaard K (1988) Transports through Bering Strait: annual and interannual variability. J Geophys Res 93(C12):15,535–15,539CrossRefGoogle Scholar
  5. Crawford WR, Cherniawsky JY, Foreman MGG (2000) Multi-year meanders and eddies in the Alaskan Stream as observed by TOPEX/Poseidon altimeter. Geophys Res Lett 27(7):1025–1028CrossRefGoogle Scholar
  6. De Boer AM, Nof D (2004) The Bering Strait’s grip on the northern hemisphere climate. Deep-Sea Res 51:1347–1366CrossRefGoogle Scholar
  7. Ducet N, Le Traon PY, Reverdin G (2000) Global high-resolution mapping of ocean circulation from TOPEX/Poseidonand ERS1 and 2. J Geophys Res 105(C8):19477–19498. doi: 10.1029/2000JC900063 CrossRefGoogle Scholar
  8. Ezer T (2006) Topographic influence on overflow dynamics: Idealized numerical simulations and the Faroe Bank Channel overflow. J Geophys Res 111(C02002). doi: 10.1029/2005JC003195
  9. Ezer T, Oey L-Y (2010) The role of the Alaskan Stream in modulating the Bering Sea climate. J Geophys Res C04025. doi: 10.1029/2009JC005830
  10. Ezer T, Oey L-Y, Lee H-C, Sturges W (2003) The variability of currents in the Yucatan Channel: analysis of results from a numerical ocean model. J Geophys Res 108(C1):3012. doi: 10.1029/2002JC001509 CrossRefGoogle Scholar
  11. Favorite F (1967) The Alaskan Stream. Int N Pac Fish Comm Bull 21:20Google Scholar
  12. Favorite F (1974) Flow into the Bering Sea through Aleutian Island passages. In: Hood DW, Kelley EJ (eds) Oceanography of the Bering Sea with emphasis on renewable resources. Publication No. 2. Institute of Marine Science, University of Alaska, Fairbanks, pp. 3–37Google Scholar
  13. Foreman MGG, Cummins PF, Cherniawsky JY, Stabeno P (2006) Tidal energy in the Bering Sea. J Mar Res 64:797–818. doi: 10.1357/0022240006779698341 CrossRefGoogle Scholar
  14. Hu H, Wang J (2010) Modeling effects of tidal and wave mixing on circulation and thermohaline structures in the Bering Sea: process studies. J Geophys Res 115(C01006). doi: 10.1029/2008JC005175
  15. Hunt GL Jr, Stabeno P, Walters G, Sinclair E, Brodeur RD, Napp JM, Bond NA (2002) Climate change and control of the southeastern Bering Sea pelagic ecosystem. Deep-Sea Res 49:5821–5853CrossRefGoogle Scholar
  16. Jin M, Deal C, Wang J, McRoy CP (2009) Response of lower trophic level production to long-term climate change in the southeastern Bering Sea. J Geophys Res 114(C04010). doi: 10.1029/2008JC005105
  17. Johnson GC, Stabeno PJ, Riser SC (2004) The Bering slope current system revisited. J Phys Oceanogr 34:384–398CrossRefGoogle Scholar
  18. Ladd C, Stabeno PJ (2009) Freshwater transport from the Pacific to the Bering Sea through Amukta Pass. Geophys Res Lett 36(L14608). doi: 10.1029/2009GL039095
  19. Legg S, Chang Y, Chassignet EP, Danabasoglu G, Ezer T, Gordon AL, Griffies S, Hallberg R, Jackson L, Large W, Ozgokmen T, Peters H, Price J, Riemenschneider U, Wu W, Xu X, Yang J (2009) Improving oceanic overflow representation in climate models: the Gravity Current Entrainment Climate Process Team. Bull Amer Met Soc 90(5):657–670CrossRefGoogle Scholar
  20. Liu SK, Leendertse JJ (1982) Three-dimensional model of Bering and Chukchi Sea. Coastal Eng 18:598–616Google Scholar
  21. Maslowski W, Roman R, Kinney JC (2008) Effects of mesoscale eddies on the flow of the Alaskan Stream. J Geophys Res 113(C07036). doi: 10.1029/2007JC004341
  22. Mellor GL (2004) Users’ guide for a three-dimensional, primitive equation, numerical ocean model. Prog Atmos Oceanic Sci, Princeton University, Princeton, p 42Google Scholar
  23. Mellor GL, Yamada T (1982) Development of a turbulent closure model for geophysical fluid problems. Rev Geophys Space Phys 20:851–875Google Scholar
  24. Ochoa J, Sheinbaum J, Baden A, Candela J, Wilson D (2001) Geostrophy via potential vorticity inversion in the Yucatan Channel. J Mar Res 59:725–747CrossRefGoogle Scholar
  25. Oey LY, Ezer T, Sturges W (2004) Modeled and observed Empirical Orthogonal Functions of currents in the Yucatan Channel. J Geophys Res 109(C08011). doi: 10.1029/2004JC002345
  26. Overland JE, Spillane MC, Hurlburt HE, Wallcraft AJ (1994) A numerical study of the circulation of the Bering Sea basin and exchange with the North Pacific Ocean. J Phys Oceanogr 24:736–758CrossRefGoogle Scholar
  27. Panteleev G, Stabeno P, Luchin VA, Nechaev DA, Ikeda M (2006) Summer transport estimates of the Kamchatka Current derived as a variational inverse of hydrophysical and surface drifter data. Geophys Res Lett 33(L09609). doi: 10.1029/2005GL024974
  28. Pickart RS, Moore GWK, Macdonald AM, Renfrew IA, Walsh JE, Kessler WS (2009) Seasonal evolution of Aleutian low pressure systems: implications for the North Pacific subpolar circulation. J Phys Oceanogr 39:1317–1339CrossRefGoogle Scholar
  29. Reed RK (1968) Transport of the Alaskan Stream. Nature 220(16):681–682CrossRefGoogle Scholar
  30. Reed RK (1984) Flow of the Alaskan Stream and its variations. Deep-Sea Res 31(4):369–386CrossRefGoogle Scholar
  31. Reed RK (1990) A year-long observation of water exchange between the North Pacific and the Bering Sea. Limnol Oceanogr 35(7):1604–1609CrossRefGoogle Scholar
  32. Reed RK, Stabeno PJ (1993) The recent return of the Alaskan Stream to Near Strait. J Mar Res 51:515–527CrossRefGoogle Scholar
  33. Reed RK, Stabeno PJ (1999) A recent full-depth survey of the Alaskan Stream. J Oceanogr 55:79–85CrossRefGoogle Scholar
  34. Roach AT, Aagaard K, Pease CH, Salo SA, Weingartner T, Pavlov V, Kulakov M (1995) Direct measurements of transport and water properties through the Bering Strait. J Geophys Res 100(C9):18,443–18,457CrossRefGoogle Scholar
  35. Royer TC (1975) Seasonal variations of waters in the northern Gulf of Alaska. Deep-Sea Res 22:403–416Google Scholar
  36. Royer TC, Emery WI (1984) Circulation in the Bering Sea, 1982–1983, based on satellite-tracked drifter observations. J Phys Oceanogr 14:1914–1920CrossRefGoogle Scholar
  37. Sheinbaum J, Candela J, Badan A, Ochoa J (2002) Flow structure and transports in the Yucatan Channel. Geophys Res Lett 29(3). doi: 10.1029/2001GL0139990
  38. Stabeno PJ, Reed R (1992) A major circulation anomaly in the western Bering Sea. Geophys Res Lett 19(16):1671–1674CrossRefGoogle Scholar
  39. Stabeno PJ, Kachel DG, Kachel NB, Sullivan ME (2005) Observations from moorings in the Aleutian Passes: temperature, salinity and transport. Fisheries Oceanogr 14(1):39–54CrossRefGoogle Scholar
  40. Stabeno PJ, Ladd C, Reed RK (2009) Observations of the Aleutian North Slope Current, Bering Sea, 1996–2001. J Geophys Res 114(C05015). doi: 10.1029/2007JC004705
  41. Stabeno PJ, Schumacher JD, Ohtani K (1999) The physical oceanography of the Bering Sea. In: Loughlin TR, Ohtani K (eds) Dynamics of the Bering Sea. University of Alaska Sea Grant AK-SG-99-03, Fairbanks, pp. 1–28Google Scholar
  42. Thomson RE (1972) On the Alaskan stream. J Phys Oceanogr 2(4):363–371CrossRefGoogle Scholar
  43. Wang J, Hu H, Mizobata K, Saitoh S (2009) Seasonal variations of sea ice and ocean circulation in the Bering Sea: a model-data fusion study. J Geophys Res 114(C02011). doi: 10.1029/2008JC004727
  44. Woodgate RA, Aagaard K, Weingartner TJ (2005) Monthly temperature, salinity, and transport variability of the Bering Strait through flow. Geophys Res Lett 32(L04601). doi: 10.1029/2004GL021880
  45. Woodgate RA, Aagaard K, Weingartner TJ (2006) Interannual changes in the Bering Strait fluxes of volume, heat and freshwater between 1991 and 2004. Geophys Res Lett 33(L15609). doi: 10.1029/2006GL026931

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© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Center for Coastal Physical OceanographyOld Dominion UniversityNorfolkUSA
  2. 2.Program in Atmospheric and Oceanic SciencesPrinceton UniversityPrincetonUSA

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