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Nearshore mixing and nutrient delivery along the western Antarctic Peninsula

  • D. Reide Corbett (a1) (a2), Jared Crenshaw (a1), Kimberly Null (a1) (a3), Richard N. Peterson (a4), Leigha E. Peterson (a4) and W. Berry Lyons (a5)...
Abstract

The surface waters of the Southern Ocean play a key role in the global climate and carbon cycles by promoting growth of some of the world’s largest phytoplankton blooms. Several studies have emphasized the importance of glacial and sediment inputs of Fe that fuel the primary production of the Fe-limited Southern Ocean. Although the fertile surface waters along the shelf of the western Antarctic Peninsula (WAP) are influenced by large inputs of freshwater, this freshwater may take multiple pathways (e.g. calving, streams, groundwater discharge) with different degrees of water-rock interactions leading to variable Fe flux to coastal waters. During the summers of 2012–13 and 2013–14, seawater samples were collected along the WAP, near Anvers Island, to observe water column dynamics in nearshore and offshore waters. Tracers (223,224Ra, 222Rn, 18O, 2H) were used to evaluate the source and transport of water and nutrients in coastal fjords and across the shelf. Coastal waters are compared across two field seasons, with increased freshwater observed during 2014. Horizontal mixing rates of water masses along the WAP ranged from 110–3600 m2 s-1. These mixing rates suggest a rapid transport mechanism for moving meltwater offshore.

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Copyright
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Corresponding author
corbettd@ecu.edu
References
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Annett, A., Henley, S., van Beek, P., Souhaut, M., Ganeshram, R., Venables, H., Meredith, M. & Geibert, W. 2013. Use of radium isotopes to estimate mixing rates and trace sediment inputs to surface waters in northern Marguerite Bay, Antarctic Peninsula. Antarctic Science, 25, 445456.
Bhatia, M., Kujawinski, E., Das, S., Breier, F., Henderson, P. & Charette, M. 2013. Greenland meltwater as a significant and potentially bioavailable source of iron to the ocean. Nature Geoscience, 6, 274278.
Christner, B.C., Priscu, J.C., Achberger, A.M., Barbante, C., Carter, S.P., Christianson, K., Michaud, A.B., Mikucki, J.A, Mitchell, A.C., Skidmore, M.L. & Vick-Majors, T.J.; WISSARD Sci Team 2014. A microbial ecosystem beneath the West Antarctic Ice Sheet. Nature, 512, 310313.
Cook, A.J., Fox, A.J., Vaughan, D.G. & Ferrigno, J.G. 2005. Retreating glacier fronts on the Antarctic Peninsula over the past half-century. Science, 308, 541544.
Dierssen, H., Smith, R. & Vernet, M. 2002. Glacial meltwater dynamics in coastal waters west of the Antarctic Peninsula. Proceedings of the National Academy of Science of the United States of America, 99, 17901795.
Ducklow, H.W., Clarke, A., Dickhut, R., Doney, S.C., Geise, H., Huang, K., Martinson, D.G., Meredith, M.P., Moeller, H.V., Montes-Hugo, M., Schofield, O., Stammerjohn, S.E., Steinberg, D. & Fraser, W. 2012. The marine system of the Western Antarctic Peninsula. In Rogers, A.D., Johnston, N.M., Murphy, E.J. & Clarke, A., eds. Antarctic ecosystems: an extreme environment in a changing world. Chichester: Wiley-Blackwell, 121159.
Dulaiova, H., Arldelan, M.V., Henderson, P.V. & Charette, M.A. 2009. Shelf-derived iron inputs drive biological productivity in the southern Drake Passage. Global Biogeochemical Cycles, 10.1029/2008GB003406.
Hawkings, J.R., Wadham, J.L., Tranter, M., Raiswell, R., Benning, L.G., Statham, P.J., Tedstone, A., Nienow, P., Lee, K. & Telling, J. 2014. Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans. Nature Communications, 10.1038/ncomms4929.
King, J.C. 1994. Recent climate variability in the vicinity of the Antarctic Peninsula. International Journal of Climatology, 14, 357369.
Klinck, J.M., Hofmann, E.E., Beardsley, R.C., Salihoglu, B. & Howard, S. 2004. Water-mass properties and circulation on the west Antarctic Peninsula continental shelf in austral fall and winter 2001. Deep-Sea Research - Topical Studies in Oceanography, 51, 19251946.
Kohut, J., Miles, T., Bernard, K., Fraser, W., Patterson-Fraser, D., Oliver, M., Cimino, M., Winsor, P., Statscewich, H. & Fredj, E. 2016. Project CONVERGE: impacts of local oceanographic processes on Adélie penguin foraging ecology. OCEANS 2016 MTS/IEEE Monterey, 10.1109/OCEANS.2016.7761152.
Kunz, M., King, M.A., Mills, J.P., Miller, P.E., Fox, A.J., Vaughan, D.G. & Marsh, S.H. 2012. Multi-decadal glacier surface lowering in the Antarctic Peninsula. Geophysical Research Letters, 10.1029/2012GL052823.
Lee, J.M. & Kim, G. 2006. A simple and rapid method for analyzing radon in coastal and ground waters using a radon-in-air monitor. Journal of Environmental Radioactivity, 89, 219228.
Lyons, W.B., Dailey, K.R., Welch, K.A., Deuerling, K.M., Welch, S.A. & McKnight, D.M. 2015. Antarctic streams as a potential source of iron for the Southern Ocean. Geology, 43, 10031006.
Meredith, M.P., Brandon, M.A., Wallace, M.I., Clarke, A., Leng, M.J., Renfrew, I.A., van Lipzig, N.P.M. & King, J.C. 2008. Variability in the freshwater balance of northern Marguerite Bay, Antarctic Peninsula: results from δ18O. Deep-Sea Research - Topical Studies in Oceanography, 55, 309322.
Meredith, M.P., Venables, H.J., Clarke, A., Ducklow, H.W., Erickson, M., Leng, M.J., Lenaerts, J.T.M. & van den Broeke, M.R. 2013. The freshwater system west of the Antarctic Peninsula: spatial and temporal changes. Journal of Climate, 26, 16691684.
Michaud, A.B., Skidmore, M.L., Mitchell, A.C., Vick-Majors, T.J., Barbante, C., Turetta, C., vanGelder, W. & Priscu, J.C. 2016. Solute sources and geochemical processes in Subglacial Lake Whillans, West Antarctica. Geology, 44, 347350.
Moffat, C., Beardsley, R.C., Owens, B. & van Lipzig, N. 2008. A first description of the Antarctic Peninsula coastal current. Deep-Sea Research - Topical Studies in Oceanography, 55, 277293.
Moore, W.S. 1996. Large groundwater inputs to coastal waters revealed by 226Ra enrichments. Nature, 380, 612614.
Moore, W.S. 2000. Determining coastal mixing rates using radium isotopes. Continental Shelf Research, 20, 19932007.
Moore, W.S. & Arnold, R. 1996. Measurement of 223Ra and 224Ra in coastal waters using a delayed coincidence counter. Journal of Geophysical Research - Oceans, 101, 13211329.
Morris, E.M. & Vaughan, D.G. 2003. Spatial and temporal variation of surface temperature on the Antarctic Peninsula and the limit of viability of ice shelves. Antarctic Research Series, 79, 6168.
Savidge, D.K. & Amft, J.A. 2009. Circulation on the West Antarctic Peninsula derived from 6 years of shipboard ADCP transects. Deep-Sea Research - Oceanographic Research Papers, 56, 16331655.
Schlosser, P., Bayer, R., Foldvik, A., Gammelsrød, T., Rohardt, G. & Münnich, K.O. 1990. Oxygen 18 and helium as tracers of ice shelf water and water/ice interaction in the Weddell Sea. Journal of Geophysical Research - Oceans, 95, 32533263.
Schofield, O., Ducklow, H., Martinson, D., Meredith, M.P., Moline, M. & Fraser, W.R. 2010. How do polar marine ecosystems respond to rapid climate change? Science, 328, 15201523.
Steig, E.J., Schneider, D.P., Rutherford, S.D., Mann, M.E., Comiso, J.C. & Shindell, D.T. 2009. Warming of the Antarctic ice sheet surface since the 1957 International Geophysical Year. Nature, 457, 459463.
Takahashi, T., Sweeney, C., Hales, B., Chipman, D.W., Newberger, T., Goddard, J.G., Iannnuzzi, R.A. & Sutherland, S.C. 2012. The changing carbon cycle in the Southern Ocean. Oceanography, 25, 2637.
Toro, M., Camacho, A., Rochera, C., Rico, E., Banon, M., Fernandez-Valiente, E., Marco, E., Justel, A., Avendano, M.C., Ariosa, Y., Vincent, W.F. & Quesada, A. 2007. Limnological characteristics of the freshwater ecosystems of Bayers Peninsula, Livingston Island, in Maritime Antarctica. Polar Biology, 30, 635649.
Turner, J., Colwell, S.R., Marshall, G.J., Lachlan-Cope, T.A., Carleton, A.M., Jones, P.D., Lagun, V., Reid, P.A. & Iagovkina, S. 2005. Antarctic climate change during the last 50 years. International Journal of Climatology, 25, 279294.
Vaughan, D.G., Marshall, G.J., Connolly, W.M., Parkinson, C.L., Mulvaney, R., Hodgson, D.A., King, J.C., Pudsey, C.J. & Turner, J. 2003. Recent rapid regional climate warming on the Antarctic Peninsula. Climatic Change, 60, 243274.
Wadham, J., De’ath, R., Monteiro, F.M., Tranter, M., Ridgwell, A., Raiswell, R. & Tulaczyk, S. 2013. The potential role of the Antarctic ice sheet in global biogeochemical cycles. Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 104, 5567.
Weppernig, R., Schlosser, P., Khatiwala, S. & Fairbanks, R.G. 1996. Isotope data from Ice Station Weddell: implications for deep water formation in the Weddell Sea. Journal of Geophysical Research - Oceans, 101, 25 72325 739.
Windom, H., Moore, W.S., Niencheski, L.F. & Jahrike, R. 2006. Submarine groundwater discharge: a large, previously unrecognized source of dissolved iron to the South Atlantic Ocean. Marine Chemistry, 102, 252256.
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Antarctic Science
  • ISSN: 0954-1020
  • EISSN: 1365-2079
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