Oceanography The Official Magazine of
The Oceanography Society
Volume 24 Issue 03

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Volume 24, No. 3
Pages 250 - 265

Fluxes, Fins, and Feathers: Relationships Among the Bering, Chukchi, and Beaufort Seas in a Time of Climate Change

Michael F. Sigler Martin Renner Seth L. Danielson Lisa B. EisnerRobert R. Lauth Kathy J. KuletzElizabeth A. Logerwell George L. Hunt Jr.
Article Abstract

Ocean currents, water masses, and seasonal sea ice formation determine linkages among and barriers between the biotas of the Bering, Chukchi, and Beaufort Seas. The Bering Sea communicates with the Chukchi and Beaufort Seas via northward advection of water, nutrients, and plankton through Bering Strait. However, continuity of the ocean’s physical properties is modulated by regional differences in heat, salt, and sea ice budgets, in particular, along the meridional gradient. Using summer density data from zooplankton, fish (bottom and surface trawl), and seabird surveys, we define three biogeographic provinces: the Eastern Bering Shelf Province (the eastern Bering Sea shelf south of Saint Lawrence Island), the Chirikov-Chukchi Province (the eastern Bering Sea shelf north of Saint Lawrence Island [Chirikov Basin] and Chukchi Sea), and the Beaufort Sea Province. Regional differences in summer distributions of biota largely reflect the underlying oceanography. Climate warming will reduce the duration and possibly the extent of seasonal ice cover in the Eastern Bering Shelf Province, but this warming may not lead to increased abundance of some subarctic species because seasonal ice cover and cold (< 2°C) bottom waters on the Bering shelf form a barrier to the northward migration of subarctic bottom fish species typical of the southeastern Bering Sea. While Arctic species that are dependent upon the summer extent of sea ice face an uncertain future, other Arctic species’ resilience to a changing climate will be derived from waters that continue to freeze each winter.


Sigler, M.F., M. Renner, S.L. Danielson, L.B. Eisner, R.R. Lauth, K.J. Kuletz, E.A. Logerwell, and G.L. Hunt Jr. 2011. Fluxes, fins, and feathers: Relationships among the Bering, Chukchi, and Beaufort Seas in a time of climate change. Oceanography 24(3):250–265, https://doi.org/10.5670/oceanog.2011.77.

Supplementary Materials

Supplemental Table (72 KB pdf)


Aagaard, K. 1984. The Beaufort Undercurrent. Pp. 47–71 in The Alaskan Beaufort Sea: Ecosystems and Environment. P. Barnes and E. Reimnitz, eds, Academic Press, New York.

Aagaard, K., L.K. Coachman, and E.C. Carmack. 1981. On the halocline of the Arctic Ocean. Deep-Sea Research Part A 28:529–545, https://doi.org/10.1016/0198-0149(81)90115-1.

Aagaard, K., T.J. Weingartner, S.L. Danielson, J.A. Woodgate, G.C. Johnson, and T.E. Whitledge. 2006. Some controls on flow and salinity in Bering Strait. Geophysical Research Letters 33, L19602, https://doi.org/10.1029/2006GL026612.

Alexander, V., and H.J. Niebauer. 1981. Oceanography of the eastern Bering Sea ice-edge zone in spring. Limnology and Oceanography 26:1,111–1,126, https://doi.org/10.4319/lo.1981.26.6.1111.

ACIA (Arctic Climate Impact Assessment). 2005. Arctic Climate Impact Assessment. Cambridge University Press, Cambridge, UK, 1,042 pp.

Ashjian, C.J., S.R. Braund, R.G. Campbell, J.C. George, J. Kruse, W. Maslowski, S.E. Moore, C.R. Nicolson, S.R. Okkonen, B.F. Sherr, and others. 2010. Climate variability, oceanography, bowhead whale distribution, and Iñupiat subsistence whaling near Barrow, Alaska. Arctic 63:179–194.

Ashjian, C.J., R.G. Campbell, H.E. Welch, M. Butler, and D. Van Keuren. 2003. Annual cycle in abundance, distribution, and size in relation to hydrography of important copepod species in the western Arctic Ocean. Deep-Sea Research Part I 50:1,235–1,261, https://doi.org/10.1016/S0967-0637(03)00129-8.

Barber, W.E., R.L. Smith, M. Vallarino, and R.M. Meyer. 1997. Demersal fish assemblages of the northeastern Chukchi Sea, Alaska. Fishery Bulletin 95:195–209.

Beaugrand, G., P.C. Reid, F. Ibanez, J.A. Lindley, and M. Edwards. 2002. Reorganization of the North Atlantic marine copepod biodiversity and climate. Science 296:1,692–1,694, https://doi.org/10.1126/science.1071329.

Berline, L, Y.H. Spitz, C.J. Ashjian, R.G. Campbell, W. Maslowski, and S.E. Moore. 2008. Euphausiid transport in the Western Arctic Ocean. Marine Ecology Progress Series 360:163–178, https://doi.org/10.3354/meps07387.

Bluhm, B.A., K.O. Coyle, B. Konar, and R. Highsmith. 2007. High gray whale relative abundances associated with an oceanographic front in the south-central Chukchi Sea. Deep-Sea Research Part II 54:2,919–2,933, https://doi.org/10.1016/j.dsr2.2007.08.015.

Bluhm, B.A., K. Iken, S. Mincks-Hardy, B.I. Sirenko, and B.A. Holladay. 2009. Community structure of epibenthic megafauna in the Chukchi Sea. Aquatic Biology 7:269–293, https://doi.org/10.3354/ab00198.

Boveng, P.L., J.L. Bengtson, T.W. Buckley, M.F. Cameron, S.P. Dahle, B.P. Kelly, B.A. Megrey, J.E. Overland, and N.F. Williamson. 2009. Status Review of the Spotted Seal (Phoca largha). US Department Commerce, NOAA Technical Memorandum NMFS-AFSC-200, 155 pp.

Boyer, T.P., J.I. Antonov, O.K. Baranova, H.E. Garcia, D.R. Johnson, R.A. Locarnini, A.V. Mishonov, T.D. O’Brien, D. Seidov, I.V. Smolyar, and M.M. Zweng. 2009. World Ocean Database, 2009. S. Levitus, ed., NOAA Atlas NESDIS 66, US Government Printing Office, Washington, DC, 216 pp., DVDs.

Carleton, R.G., and B.P. Hayden. 1993. Marine biogeographic provinces of the Bering, Chukchi and Beaufort Seas. Pp. 175–184 in Large Marine Ecosystems: Stress, Mitigation and Sustainability. K. Sherman, L.M. Alexander, and B.D. Gold, eds, AAAS Press, Washington, DC.

Carmack, E.C., R.W. Macdonald, and J.E. Papdakis. 1989. Water mass structure and boundaries in the Mackenzie shelf estuary. Journal of Geophysical Research 94:18,043–18,055, https://doi.org/10.1029/JC094iC12p18043.

Carmack, E., and P. Wassmann. 2006. Food webs and physical–biological coupling on pan-Arctic shelves: Unifying concepts and comprehensive perspectives. Progress in Oceanography 7:446–477, https://doi.org/10.1016/j.pocean.2006.10.004.

Coachman, L.K., and K. Aagaard. 1966. On the water exchange through Bering Strait. Limnology and Oceanography 11(1):44–59, https://doi.org/10.4319/lo.1966.11.1.0044.

Coachman, L.K., and K. Aagaard. 1974. Physical oceanography of arctic and subarctic seas. Pp. 1–72 in Marine Geology and Oceanography of the Arctic Seas. Y. Herman, ed., Springer Verlag, New York.

Coachman, L.K., and C.A. Barnes. 1961. The contribution of Bering Sea water to the Arctic Ocean. Arctic 14:146–161.

Coachman, L.K., K. Aagaard, and R.B. Tripp. 1975. Bering Strait: The Regional Physical Oceanography. University of Washington Press, Seattle, 172 pp.

Comiso, J.C. 2002. A rapidly declining perennial sea ice cover in the Arctic. Geophysical Research Letters 29, 1956, https://doi.org/10.1029/2002GL015650.

Coyle, K.O., B. Bluhm, B. Konar, A. Blanchard, and R.C. Highsmith. 2007. Amphipod prey of gray whales in the Northern Bering Sea: Comparison of biomass and distribution between the 1980’s and 2002–2003. Deep-Sea Research Part II 54:2,906–2,918, https://doi.org/10.1016/j.dsr2.2007.08.026.

Coyle, K.O., A.I. Pinchuk, L.B. Eisner, and J.M. Napp. 2008. Zooplankton species composition, abundance and biomass on the eastern Bering Sea shelf during summer: The potential role of water column stability and nutrients in structuring the zooplankton community. Deep-Sea Research Part II 55:1,755–1,791, https://doi.org/10.1016/j.dsr2.2008.04.029.

Coyle, K.O., L.B. Eisner, F.J. Mueter, A.I. Pinchuk, M.A. Janout, K.D. Cieciel, E.V. Farley, and A.G. Andrew. 2011. Climate change in the southeastern Bering Sea: Impacts on pollock stocks and implications for the Oscillating Control Hypothesis. Fisheries Oceanography 20:139–156, https://doi.org/10.1111/j.1365-2419.2011.00574.x.

Cui, X., J.M. Grebmeier, L.W. Cooper, J.R. Lovvorn, C.A. North, W.L. Seaver, and J.M. Kolts. 2009. Spatial distributions of groundfish in the northern Bering Sea in relation to environmental variation. Marine Ecology Progress Series 393:147–160, https://doi.org/10.3354/meps08275.

Danielson, S., L. Eisner, T. Weingartner, and K. Aagaard. 2011. Thermal and haline variability over the central Bering Sea shelf: Seasonal and interannual perspectives. Continental Shelf Research, https://doi.org/10.1016/j.csr.2010.12.010.

Department of the Interior. 2008. Determination of threatened status for the polar bear (Ursus maritimus) throughout its range. Federal Register/Vol. 73, No. 95/Thursday, May 15, 2008/Rules and Regulations: 28,212–28,303.

Dunton, K.H., T. Weingartner, and E.C. Carmack. 2006. The nearshore western Beaufort Sea ecosystem: Circulation and importance of terrestrial carbon in arctic coastal food webs. Progress in Oceanography 71:362–378, https://doi.org/10.1016/j.pocean.2006.09.011.

Elphick, C.S., and G.L. Hunt Jr. 1993. Variations in the distributions of marine birds with water mass in the northern Bering Sea. Condor 95:33–44, https://doi.org/10.2307/1369384.

Feder, H.M., A.S. Naidu, S.C. Jewett, J.M. Hameedi, W.R. Johnson, and T.E. Whitledge. 1994. The northeastern Chukchi Sea: Benthos-environmental interactions. Marine Ecology Progress Series 111:171–190, https://doi.org/10.3354/meps111171.

Goosse, H., T. Fichefet, and J.-M. Campin. 1997. The effects of the water flow through the Canadian archipelago in a global ice-ocean model. Geophysical Research Letters 24:1,507–1,510, https://doi.org/10.1029/97GL01352.

Gradinger, R. 2009. Sea-ice algae: Major contributors to primary production and algal biomass in the Chukchi and Beaufort Seas during May/June 2002. Deep-Sea Research Part II 56:1,201–1,212, https://doi.org/10.1016/j.dsr2.2008.10.016.

Grebmeier, J.M., and C.P. McRoy. 1989. Pelagic-benthic coupling on the shelf of the northern Bering and Chukchi Seas. III. Benthic food supply and carbon cycling. Marine Ecology Progress Series 53:79–91, https://doi.org/10.3354/meps053079.

Grebmeier, J.M., L.W. Cooper, H.M. Feder, and B.I. Sirenko. 2006b. Ecosystem dynamics of the Pacific-influenced Northern Bering and Chukchi Seas in the Amerasian Arctic. Progress in Oceanography 71:331–336, https://doi.org/10.1016/j.pocean.2006.10.001.

Grebmeier, J.M., C.P. McRoy, and H.M. Feder. 1988. Pelagic–benthic coupling on the shelf of the northern Bering and Chukchi Sea. I. Food supply and benthic biomass. Marine Ecology Progress Series 48:57–67, https://doi.org/10.3354/meps048057.

Grebmeier, J.M., J.E. Overland, S.E. Moore, E.V. Farley, E.C. Carmack, L.W. Cooper, K.E. Frey, J.H. Helle, F.A. McLoughlin, and L. McNutt. 2006a. A major ecosystem shift observed in the northern Bering Sea. Science 311:1,461–1,464, https://doi.org/10.1126/science.1121365.

Highsmith, R.C., K.O. Coyle, B.A. Bluhm, and B. Konar. 2006. Gray whales in the Bering and Chukchi Seas. Pp. 303–313 in Whales, Whaling and Ocean Ecosystems. J.A. Estes, D.P. DeMaster, D.F. Doak, T.M. Williams, and R.L. Brownell Jr., eds, UC Press, Santa Cruz, CA.

Hovelsrud, G.K., M. McKenna, and H.P. Huntington. 2008. Marine mammal harvests and other interactions with humans. Ecological Applications 18:S135–S147, https://doi.org/10.1890/06-0843.1.

Hunt, G.L. Jr., and N.M. Harrison. 1990. Foraging habitat and prey taken by least auklets at King Island, Alaska. Marine Ecology Progress Series 65:141–150, https://doi.org/10.3354/meps065141.

Hunt, G.L. Jr., B.M. Allen, R.P. Angliss, T. Baker, N. Bond, G. Buck, G.V. Byrd, K.O. Coyle, A. Devol, D.M. Eggers, and others. 2010. Status and trends of the Bering Sea region, 2003–2008. Pp. 196–267 in Marine Ecosystems of the North Pacific Ocean, 2003–2008. S.M. McKinnell and M.J. Dagg, eds, PICES Special Publication 4, North Pacific Marine Science Organization, Sidney, BC.

Hunt, G.L. Jr., B. Burgeson, and G. Sanger. 1981. Feeding ecology of seabirds of the eastern Bering Sea. Pp. 629–647 in The Bering Sea Shelf: Oceanography and Resources. D.W. Hood and J.A. Calder, eds, Office of Marine Pollution Assessment, NOAA. University of Washington Press, Seattle, WA.

Hunt, G.L. Jr., K.O. Coyle, L. Eisner, E.V. Farley, R. Heintz, F. Mueter, J.M. Napp, J.E. Overland, P.H. Ressler, S. Salo, and P.J. Stabeno. 2011. Climate impacts on eastern Bering Sea food webs: A synthesis of new data and an assessment of the oscillating control hypothesis. ICES Journal of Marine Science, https://doi.org/10.1093/icesjms/fsr036.

Hunt, G.L. Jr., N.M. Harrison, and T. Cooney. 1990. Foraging of least auklets: The influence of hydrographic structure and prey abundance. Studies in Avian Biology 14:7–22.

Hunt, G.L. Jr., H. Kato, and S.M. McKinnell, eds. 2000. Predation by Marine Birds and Mammals in the Subarctic North Pacific Ocean. PICES Scientific Report No. 14. 165 pp.

Hunt, G.L. Jr., P.J. Stabeno, S. Strom, and J.M. Napp. 2008. Patterns of spatial and temporal variation in the marine ecosystem of the southeastern Bering Sea, with special reference to the Pribilof Domain. Deep-Sea Research Part II 55:1,919–1,944, https://doi.org/10.1016/j.dsr2.2008.04.032.

Hunt, G.L. Jr., P.J. Stabeno, G. Walters, E. Sinclair, R.D. Brodeur, J.M. Napp, and N.A. Bond. 2002. Climate change and control of the southeastern Bering Sea pelagic ecosystem. Deep-Sea Research Part II 49:5,821–5,853, https://doi.org/10.1016/S0967-0645(02)00321-1.

Jahncke, J., K.O. Coyle, and G.L. Hunt Jr. 2005. Seabird distribution, abundance and diets in the central and eastern Aleutian Islands. Fisheries Oceanography 14(Suppl. 1):160–177, https://doi.org/10.1111/j.1365-2419.2005.00372.x.

Jin, M., C. Deal, J. Wang, V. Alexander, R. Gradinger, S. Saitoh, T. Iida, Z. Wan, and P. Stabeno. 2007. Ice-associated phytoplankton blooms in the southeastern Bering Sea. Geophysical Research Letters 34, L06612, https://doi.org/10.1029/2006GL028849.

Kachel, N.B., G.L. Hunt Jr., S.A. Salo, J.D. Schumacher, P.J. Stabeno, and T.E. Whitledge. 2002. Characteristics and variability of the inner front of the southeastern Bering Sea. Deep-Sea Research Part II 49:5,889–5,909, https://doi.org/10.1016/S0967-0645(02)00324-7.

Kelly, B.P., J.L. Bengtson, P.L. Boveng, M.F. Cameron, S.P. Dahle, J.K. Jansen, E.A. Logerwell, J.E. Overland, C.L. Sabine, G.T. Waring, and J.M. Wilder. 2010. Status Review of the Ringed Seal (Phoca hispida). US Department of Commerce, NOAA Technical Memorandum NMFS-AFSC-212, 250 pp.

Knight, C.A., C.C. Cheng, and A.L. DeVriesa. 1991. Adsorption of alpha-helical antifreeze peptides on specific ice crystal surface planes. Biophysical Journal 59:409–418, https://doi.org/10.1016/S0006-3495(91)82234-2.

Ladd, C., J. Jahncke, G.L. Hunt Jr., K.O. Coyle, and P.J. Stabeno. 2005. Hydrographic features and seabird foraging in the Aleutian Passes. Fisheries Oceanography 14(Suppl. 1):178–195, https://doi.org/10.1111/j.1365-2419.2005.00374.x.

Legendre, P., and L. Legendre. 1998. Numerical Ecology, 2nd English ed. Elsevier, Amsterdam, Netherlands.

Lovvorn, J.R., L.W. Cooper, M.L. Brooks, C.C. DeRuyck, J.K. Bump, and J.M. Grebmeier. 2005. Organic matter pathways to zooplankton and benthos under pack ice in late winter and open water in late summer in the north-central Bering Sea. Marine Ecology Progress Series 291:135–150, https://doi.org/10.3354/meps291135.

Macdonald, R.W., and E.C. Carmack. 1991. The role of large-scale under-ice topography in separating estuary and ocean on an Arctic shelf. Atmosphere-Ocean 29:37–53, https://doi.org/10.1080/07055900.1991.9649391.

Macdonald, R.W., E.C. Carmack, F.A. McLaughlin, K. Iseki, D.M. Macdonald, and M.O. O’Brien. 1989. Composition and modification of water masses in the Mackenzie shelf estuary. Journal of Geophysical Research 94:18,057–18,070, https://doi.org/10.1029/JC094iC12p18057.

Mathis, J.T., R.S. Pickart, D.A. Hansell, D. Kadko, and N.R. Bates. 2007. Eddy transport of organic carbon and nutrients from the Chukchi Shelf: Impact on the upper halocline of the western Arctic Ocean. Journal of Geophysical Research 112, C05011, https://doi.org/10.1029/2006JC003899.

McRoy, C.P., and J.J. Goering. 1974. The influence of ice on the primary productivity of the Bering Sea. Pp. 403–421 in Oceanography of the Bering Sea. D.W. Hood and E.J. Kelley, eds, University of Alaska Institute of Marine Science Occasional Publication 2, Fairbanks, AK.

Moore, S.E., J.C. George, G. Sheffield, J. Bacon, and C.J. Ashjian. 2010. Bowhead whale distribution and feeding near Barrow, Alaska, in late summer 2005–06. Arctic 63:195–205.

Moss, J.H., E.V. Farley Jr., and A.M. Feldmann. 2009. Spatial distribution, energetic status, and food habits of eastern Bering Sea age-0 walleye pollock. Transactions of the American Fisheries Society 138:497–505, https://doi.org/10.1577/T08-126.1.

Mountain, D.G., L.K. Coachman, and K. Aagaard. 1976. On the flow through Barrow Canyon. Journal of Physical Oceanography 6:461–470, https://doi.org/10.1175/1520-0485(1976)006<0461:OTFTBC>2.0.CO;2.

Muench, R.D., J.D. Schumacher, and S.A. Salo. 1988. Winter currents and hydrographic conditions on the northern central Bering Sea shelf. Journal of Geophysical Research 93:516–526, https://doi.org/10.1029/JC093iC01p00516.

Mueter, F.J., and M.A. Litzow. 2008. Sea ice retreat alters the biogeography of the Bering Sea continental shelf. Ecological Applications 18:309–320, https://doi.org/10.1890/07-0564.1.

Mueter, F.J., N. Bond, J. Ianelli, and A. Hollowed. 2011. Expected declines in recruitment of walleye pollock (Theragra chalcogramma) in the eastern Bering Sea under future climate change. ICES Journal of Marine Science 68:1,284–1,296, https://doi.org/10.1093/icesjms/fsr022.

Münchow, A., R.S. Pickart, T.J. Weingartner, R.A. Woodgate, and D. Kadko. 2006. Arctic boundary currents over the Chukchi and Beaufort slope seas: Observational snapshots, transports, scales, and spatial variability from ADCP surveys. Eos, Transactions, American Geophysical Union 87(36), Ocean Sciences Meeting Supplement, Abstract OS33N-03.

Mundy, C.J., M. Gosselin, J. Ehn, Y. Gratton, A. Rossnagel, D.G. Barber, J. Martin, J-E. Tremblay, M. Palmer, K.R. Arrigo, and others. 2009. Contribution of under-ice primary production to an ice-edge upwelling phytoplankton bloom in the Canadian Beaufort Sea. Geophysical Research Letters 36, L17601, https://doi.org/10.1029/2009GL038837.

Nelson, R.J., E.C. Carmack, F.A. McLaughlin, and G.A. Cooper. 2009. Penetration of Pacific zooplankton into the western Arctic Ocean tracked with molecular population genetics. Marine Ecology Progress Series 381:129–138, https://doi.org/10.3354/meps07940.

Niebauer, H.J., N.A. Bond, L.P. Yakunin, and V.V. Plotnikov. 1999. An update on the climatology and sea ice of the Bering Sea. Pp. 29–59 in Dynamics of the Bering Sea: A Summary of Physical, Chemical, and Biological Characteristics, and a Synopsis of Research on the Bering Sea. T.R. Loughlin and K. Ohtani, eds, University of Alaska Sea Grant, AK-SG-99-03, North Pacific Marine Science Organization, Sidney, BC.

Nikolopoulos, A., R.S. Pickart, P.S. Fratantoni, K. Shimada, D.J. Torres, and E.P. Jones. 2009. The western Arctic boundary current at 152°W: Structure, variability, and transport. Deep-Sea Research Part II 56:1,164–1,181, https://doi.org/10.1016/j.dsr2.2008.10.014.

Norcross, B.L., B.A. Holladay, M.S. Busby, and K.L. Mier. 2010. Demersal and larval fish assemblages in the Chukchi Sea. Deep-Sea Research Part II 57:57–70, https://doi.org/10.1016/j.dsr2.2009.08.006.

Overland, J.E., M. Wang, K.R. Wood, D.B. Percival, and N.A. Bond. Provisionally accepted. Recent Bering Sea warm and cold events in a 95-year perspective. Deep-Sea Research Part II.

Pease, C.H. 1980. Eastern Bering Sea Ice Processes. Monthly Weather Review 108:2,015–2,023, https://doi.org/10.1175/1520-0493(1980)108<2015:EBSIP>2.0.CO;2.

Pease, C.H. 1981. Eastern Bering Sea ice dynamics and thermodynamics (Chapter 13). Pp. 213–222 in Eastern Bering Sea Shelf: Oceanography and Resources, vol. 1. D.W. Hood and J.A. Calder, eds, National Oceanic and Atmospheric Administration, Washington, DC.

Perry, A.L., P.J. Low, J.R. Ellis, and J.D. Reynolds. 2005. Climate change and distribution shifts in marine fishes. Science 308:1,912–1,915, https://doi.org/10.1126/science.1111322.

Phillips, L.M., A. Powell, E.J. Taylor, and E.A. Rexstad. 2007. Use of the Beaufort Sea by king eiders nesting on the North Slope of Alaska. Journal of Wildlife Management 71:1,892–1,899, https://doi.org/10.2193/2005-636.

Piatt, J.F., and A.M. Springer. 2003. Advection, pelagic food webs and the biogeography of Beringia. Marine Ornithology 31:141–154.

Pickart, R.S. 2004. Shelfbreak circulation in the Alaskan Beaufort Sea: Mean structure and variability. Journal of Geophysical Research 109, C04024, https://doi.org/10.1029/2003JC001912.

Quakenbush, L.T., J.J. Citta, J.C. George, R.J. Small, and M.P. Heide-Jorgensen. 2010. Fall and winter movements of bowhead whales (Balaena mysticetus) in the Chukchi Sea and within a potential petroleum development area. Arctic 63:289–307.

Rand, K.M., and E.A. Logerwell. 2010. The first demersal trawl survey of benthic fish and invertebrates in the Beaufort Sea since the late 1970s. Polar Biology, https://doi.org/10.1007/s00300-010-0900-2.

Reason, C.J.C., and S.B. Power. 1994. The influence of the Bering Strait on the circulation in a coarse resolution global ocean model. Climate Dynamics 9:363–369, https://doi.org/10.1007/BF00223448.

Roach, A.T., K. Aagaard, C.H. Pease, S.A. Salo, T. Weingartner, V. Pavlov, and M. Kulakov. 1995. Direct measurements of transport and water properties through the Bering Strait. Journal of Geophysical Research 100:18,443–18,457, https://doi.org/10.1029/95JC01673.

Royer, T.C. 1982. Coastal fresh water discharge in the Northeast Pacific. Journal of Geophysical Research 87:2,017–2,021, https://doi.org/10.1029/JC087iC03p02017.

Schneider, D.C., G.L. Hunt Jr., and N.M. Harrison. 1986. Mass and energy transfer to seabirds in the southeastern Bering Sea. Continental Shelf Research 5:241–257, https://doi.org/10.1016/0278-4343(86)90017-8.

Schumacher, J.D., C.A. Pearson, and R.K. Reed. 1982. An exchange of water between the Gulf of Alaska and the Bering Sea through Unimak Pass. Journal of Geophysical Research 87:5,785–5,795, https://doi.org/10.1029/JC087iC08p05785.

Spencer, P.D. 2008. Density-independent and density-dependent factors affecting temporal changes in spatial distributions of eastern Bering Sea flatfish. Fisheries Oceanography 17:396–410, https://doi.org/10.1111/j.1365-2419.2008.00486.x.

Spall, M.A., R.S. Pickart, P.S. Fratantoni, and A.J. Plueddemann. 2008. Western Arctic shelfbreak eddies: Formation and transport. Journal of Physical Oceanography 38:1,644–1,668, https://doi.org/10.1175/2007JPO3829.1.

Springer, A.M., C.P. McRoy, and M.V. Flint. 1996. The Bering Sea green-belt: Shelf-edge processes and ecosystem production. Fisheries Oceanography 5:205–223, https://doi.org/10.1111/j.1365-2419.1996.tb00118.x.

Stabeno, P.J., E. Farley, N. Kachel, S. Moore, C. Mordy, J.M. Napp, J.E. Overland, A.I. Pinchuk, and M.F. Sigler. Provisionally accepted. A comparison of the physics, chemistry, and biology of the northeastern and southeastern Bering Sea shelf. Deep-Sea Research Part II.

Stabeno, P., J. Napp, C. Mordy, and T. Whitledge. 2010. Factors influencing physical structure and lower trophic levels of the eastern Bering Sea shelf in 2005: Sea ice, tides and winds. Progress in Oceanography 85:180–196, https://doi.org/10.1016/j.pocean.2010.02.010.

Stabeno, P.J., R.K. Reed, and J.D. Schumacher. 1995. The Alaska Coastal Current: Continuity of transport and forcing. Journal of Geophysical Research 100:2,477–2,485, https://doi.org/10.1029/94JC02842.

Stevenson, D., and R. Lauth. Provisionally accepted. Latitudinal trends and temporal shifts in the seafloor ecosystem of the eastern Bering Sea shelf and southeastern Chukchi Sea. Deep-Sea Research Part II.

Stigebrandt, A. 1984. The North Pacific: A global-scale estuary. Journal of Physical Oceanography 14:464–470, https://doi.org/10.1175/1520-0485(1984)014<0464:TNPAGS>2.0.CO;2.

Suydam, R.S. 2000. King eider (Somateria spectabilis). P. 28 in The Birds of North America, no. 491. A. Poole and F. Gill, eds, Philadelphia, PA.

Sverdrup, H.U. 1929. The waters on the north Siberian shelf. Scientific Research Norwegian North Polar Expedition 4:1–131.

Takenouti, A.Y., and K. Ohtani. 1974. Currents and water masses in the Bering Sea: A review of Japanese work. Pp. 39–57 in Oceanography of the Bering Sea. D.W. Hood, and E.J. Kelley, eds, Occasional Publication No. 2, Institute of Marine Science, University of Alaska Fairbanks, Fairbanks, AK.

Tynan, C.T., and D.P. DeMaster. 1997. Observations and predictions of Arctic climatic change: Potential effects on marine mammals. Arctic 50:308–322.

Van Vorhees, D., and A. Lowther. 2010. Fisheries of the United States 2009. Current Fishery Statistics No. 2009, National Marine Fisheries Service, Silver Spring, MD, 103 pp. Available online at: http://www.st.nmfs.noaa.gov/st1/fus/fus09/fus_2009.pdf (accessed June 13, 2011).

Walsh, J.J., C.P. McRoy, L.K. Coachman, J.J. Goering, J.J. Nihoul, T.E. Whitledge, T.H. Blackburn, P.L. Parker, C.D. Wirick, P.G. Shuert, and others. 1989. Carbon and nitrogen cycling within the Bering/Chukchi Seas: Source regions for organic matter effecting AOU demands of the Arctic Ocean. Progress in Oceanography 22:279–361, https://doi.org/10.1016/0079-6611(89)90006-2.

Wassmann, P., C.M. Duarte, S. Agusti, and M.K. Sejr. 2011. Footprints of climate change in the Arctic marine ecosystem. Global Change Biology 17:1,235–1,249, https://doi.org/10.1111/j.1365-2486.2010.02311.x.

Weingartner, T., K. Aagaard, R. Woodgate, S. Danielson, Y. Sasaki, and D. Cavalieri, 2005b. Circulation on the north central Chukchi Sea shelf. Deep-Sea Research Part II 52:3,150–3,174, https://doi.org/10.1016/j.dsr2.2005.10.015.

Weingartner, T.J., S.L. Danielson, J.L. Kasper, and S.R. Okkonen. 2009. Circulation and Water Property Variations in the Nearshore Alaska Beaufort Sea. MMS Contract Report M03PC00015, 155 pp.

Weingartner, T.J., S.L. Danielson, and T.C. Royer. 2005a. Freshwater variability and predictability in the Alaska Coastal Current. Deep-Sea Research Part II 52:169–191, https://doi.org/10.1016/j.dsr2.2004.09.030.

Weingartner, T.J., S. Danielson, Y. Sasaki, V. Pavlov, and M. Kulakov. 1999. The Siberian Coastal Current: A wind and buoyancy-forced arctic coastal current. Journal of Geophysical Research 104:29,697–29,713, https://doi.org/10.1029/1999JC900161.

Wiseman, W.J., and L.J. Rouse. 1980. A coastal jet in the Chukchi Sea. Arctic 33:21–29.

Woodgate, R.A., K. Aagaard, and T.J. Weingartner. 2005. Monthly temperature, salinity, and transport variability of the Bering Strait through flow. Geophysical Research Letters 32, L04601, https://doi.org/10.1029/2004GL021880.

Woodgate, R.A., K. Aagaard, and T.J. Weingartner. 2006. Interannual changes in the Bering Strait fluxes of volume, heat and freshwater between 1991 and 2004. Geophysical Research Letters 33, L15609, https://doi.org/10.1029/2006GL026931.