Skip to main content Accessibility help
×
Home

The influence of the Drygalski Ice Tongue on the local ocean

  • Craig Stevens (a1) (a2), Won Sang Lee (a3) (a4), Giannetta Fusco (a5), Sukyoung Yun (a3), Brett Grant (a1), Natalie Robinson (a1) and Chung Yeon Hwang (a3)...

Abstract

The Drygalski Ice Tongue presents an ~80 km long floating obstacle to alongshore flows in the Victoria Land coastal ocean region of the Western Ross Sea. Here we use oceanographic data from near to the tongue to explore the interplay between the floating glacier and the local currents and stratification. A vessel-based circuit of the glacier, recording ocean temperature and salinity profiles, reveals the southwest corner to be the coldest and most complex in terms of vertical structure. The southwest corner structure beneath the surface warm, salty layer sustains a block of very cold water extending to 200 m depth. In this same location there was a distinct layer at 370 m not seen anywhere else of water at ~−1.93°C. The new observations broadly, but not directly, support the presence of a coherent Victoria Land Coastal Current. The data suggest the northward moving coastal current turns against the Coriolis force and works its way anticlockwise around the glacier, but with leakage beneath the glacier through the highly ‘rippled’ underside, resulting in a spatially heterogeneous supply to the Terra Nova Bay Polynya region – an important location for the formation of high-salinity shelf water.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      The influence of the Drygalski Ice Tongue on the local ocean
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      The influence of the Drygalski Ice Tongue on the local ocean
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      The influence of the Drygalski Ice Tongue on the local ocean
      Available formats
      ×

Copyright

This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike licence (http://creativecommons.org/licenses/by-nc-sa/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the same Creative Commons licence is included and the original work is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use.

References

Hide All
Baroni, C and 12 others (2002) Relief Inlet Quadrangle (Victoria Land) (scale 1:250,000). Siena Museo de Antartide, PNRA.
Bianchi, C, Chiappini, M, Tabacco, IE, Passerini, A, Zirizzotti, A and Zuccheretti, E (2001) Morphology of bottom surfaces of glacier ice tongues in the East Antarctic region. Annali di Geofisica, 44, 127135 (http://hdl.handle.net/2122/1192)
Budillon, G and Spezie, G (2000) Thermohaline structure and variability in the Terra Nova Bay polynya, Ross Sea. Antarct. Sci., 12(04), 493508 (doi: /10.1017/S0954102000000572)
Cappelletti, A, Picco, P and Peluso, T (2010) Upper ocean layer dynamics and response to atmospheric forcing in the Terra Nova Bay polynya, Antarctica. Antarct. Sci., 22, 319329 (doi: 10.1017/S095410201000009X)
Deleersnijder, E, Norro, A and Wolanski, E (1992) A three-dimensional model of the water circulation around an island in shallow water. Cont. Shelf Res., 12(7–8), 891906
Dinniman, MS, Klinck, JM and Smith, WO (2003) Cross-shelf exchange in a model of the Ross Sea circulation and biogeochemistry. Deep Sea Res. Part II Top. Stud. Oceanogr., 50(22), 31033120 (doi: 10.1016/j.dsr2.2003.07.011)
Fer, I, Makinson, K and Nicholls, KW (2012) Observations of thermohaline convection adjacent to Brunt Ice Shelf. J. Phys. Oceanogr., 42, 502508 (doi: 10.1175/JPO-D-11-0211.1)
Frezzotti, M and Mabin, MCG (1994) 20th century behaviour of Drygalski Ice Tongue, Ross Sea, Antarctica. Ann. Glaciol., 20, 397400 (doi: 10.3189/172756494794587492)
Jeffries, MO and Weeks, WF (1992) Structural characteristics and development of sea ice in the western Ross Sea. Antarct. Sci., 5, 6375 (doi: 10.1017/S0954102093000094)
Jendersie, S (2016) Circulation of the Ross Sea including the Ross Ice Shelf cavity (PhD thesis, University of Otago)
Johnson, HL, Münchow, A, Falkner, KK and Melling, H (2011) Ocean circulation and properties in Petermann Fjord, Greenland. J. Geophys. Res. Oceans, 116(C1) (doi: 10.1029/2010JC006519)
Kurtz, DD and Bromwich, DH (1985) A recurring, atmospherically forced Polynya in Terra Nova Bay, In Jacobs, SS (ed.) Oceanology of the Antarctic Continental Shelf. American Geophysical Union, Washington, DC (doi: 10.1029/AR043p0177)
Langhorne, PJ and 10 others (2015) Observed platelet ice distributions in Antarctic sea ice: an index for ocean-ice shelf heat flux. Geophys. Res. Lett., 42(13), 54425451.
Legresy, B, Wendt, A, Tabacco, I, Remy, F and Dietrich, R (2004) Influence of tides and tidal current on Mertz Glacier, Antarctica. J. Glaciol., 50(170), 427435. (doi: 10.3189/172756504781829828)
Leonard, GH and 5 others (2006) Observations of platelet ice growth and oceanographic conditions during the winter of 2003 in McMurdo Sound, Antarctica. J. Geophys. Res. Oceans, 111(C4), C04012 (doi: 10.1029/2005JC002952)
Lewis, EL and Perkin, RG (1985) The winter oceanography of McMurdo Sound, Antarctica. In Jacobs, SS (ed.) Oceanology of the Antarctic Continental Shelf American Geophysical Union, Washington, DC 145165. (doi: 10.1029/AR043p0145)
Li, T, Ding, Y, Zhao, T and Cheng, X (2016) Iceberg calving from the Antarctic Nansen Ice Shelf in April 2016 and its local impact. Sci. Bull., 61, 1157 (doi: 10.1007/s11434-016-1124-9)
MacAyeal, DR and 5 others (2008) Tabular iceberg collisions within the coastal regime. J. Glaciol., 54(185), 371386.
Mahoney, AR and 6 others (2011) The seasonal appearance of ice shelf water in coastal Antarctica and its effect on sea ice growth. J. Geophys. Res., 116, C11032 (doi: 10.1029/2011JC007060)
McPhee, MG, Stevens, CL, Smith, IJ and Robinson, NJ (2016) Turbulent heat transfer as a control of platelet ice growth in supercooled under-ice ocean boundary layers. Ocean Sci., 12, 507 (doi: 10.5194/os-12-507-2016)
Robertson, R, Padman, L and Levine, MD (1995) Fine structure, microstructure, and vertical mixing processes in the upper ocean in the western Weddell Sea. J. Geophys. Res., 100, 1851718535 (doi: 10.1029/95JC01742)
Robinson, NJ, Williams, MJM, Stevens, CL, Langhorne, PJ and Haskell, TG (2014) Evolution of a supercooled Ice Shelf Water plume with an actively growing subice platelet matrix. J. Geophys. Res. Oceans, 119, 34253446 (doi: 10.1002/2013JC009399)
Rusciano, E, Budillon, G, Fusco, G and Spezie, G (2013) Evidence of atmosphere–sea ice–ocean coupling in the Terra Nova Bay polynya (Ross Sea—Antarctica). Cont. Shelf Res., 61, 112124 (doi: 10.1016/j.csr.2013.04.002)
Souchez, R and 8 others (1991) Ice composition evidence of marine ice transfer along the bottom of a small Antarctic ice shelf. Geophys. Res. Lett., 18(5), 849852 (doi: 10.1029/91GL01077)
Stevens, CL, Robinson, NJ, Williams, MJM and Haskell, TG (2009) Observations of turbulence beneath sea ice in southern McMurdo Sound, Antarctica. Ocean Sci., 5, 435445 (doi: 10.5194/os-5-435-2009)
Stevens, CL, Stewart, CL, Robinson, NJ, Williams, MJM and Haskell, TG (2011) Flow and mixing near a glacier tongue: a pilot study. Ocean Sci., 7, 293304 (doi: 10.5194/os-7-293-2011)
Stevens, CL and 5 others (2014) The influence of an Antarctic glacier tongue on near-field ocean circulation and mixing. J. Geophys. Res. Oceans, 119, 23442362 (doi: 10.1002/2013JC009070)
Tison, J-L, Ronveaux, D and Lorrain, RD (1993) Low salinity frazil ice generation at the base of a small Antarctic ice shelf. Antarct. Sci., 5, 309322 (doi: doi:10.1017/S0954102093000409)
Van Woert, ML and 6 others (2001) Satellite observations of upper-ocean currents in Terra Nova Bay, Antarctica. Ann. Glaciol., 33, 407412 (doi: 10.3189/172756401781818879)
Vennell, R (1998) Oscillating barotropic currents along short channels. J. Phys. Oceanogr., 28, 15611569 (doi: 10.1175/1520-0485(1998)028<1561:OBCASC>2.0.CO;2)
Wang, Q, Danilov, S and Schröter, J (2009) Bottom water formation in the southern Weddell Sea and the influence of submarine ridges: idealized numerical simulations. Ocean Model., 28, 5059 (doi: 10.1016/j.ocemod.2008.08.003)
Wolk, F, Yamazaki, H, Seuront, L and Lueck, RG (2002) A new free-fall profiler for measuring biophysical microstructure. J. Atmos. Oceanic Technol., 19, 780793 (doi: 10.1175/1520-0426(2002)019<0780:ANFFPF>2.0.CO;2)

Keywords

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed