5
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Processes and Models of Antarctic Glaciomarine Sedimentation

      ,
      Annals of Glaciology
      Cambridge University Press (CUP)

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Glaciomarine sediments (GMS) comprise detrital, biogenic, and authigenic materials of two principal facies: laminated deposits and massive aqueous till. The processes governing sedimentation of the ice-rafted debris (IRD) component of GMS are investigated in the marine zone around Antarctica. Four controlling factors are identified: nature and disposition of sediments at the grounding line, transition from grounded to floating ice (ice shelves, outlet glaciers, and ice cliffs), processes of under-side melting and freezing of these ice masses, and, finally, mechanisms of iceberg calving, fragmentation, and melt-release of debris in the open ocean. Modelling studies of Brunt and Ross ice shelves suggest two main conclusions. (1) Ice shelves are of major importance for sedimentation on the continental shelf. Bulk •debris release occurs within the grounding-line zone which may frequently oscillate, producing pronounced diachronism. Bottom melting removes all debris prior to calving at the ice front so that ice shelves do not play a part in deposition in the open ocean. (2) Outlet glaciers, in contrast, have high sediment content, calve rapidly, and produce debris-rich icebergs which contribute the major portion of IRD in the ocean.

          Related collections

          Most cited references19

          • Record: found
          • Abstract: not found
          • Book: not found

          The operated Markov´s chains in economy (discrete chains of Markov with the income)

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Melting of Ice in Sea Water: A Primitive Model with Application to the Antarctic Ice Shelf and Icebergs

              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Circulation and melting beneath the ross ice shelf.

              Thermohaline observations in the water column beneath the Ross Ice Shelf and along its terminal face show significant vertical stratification, active horizontal circulation, and net melting at the ice shelf base. Heat is supplied by seawater that moves southward beneath the ice shelf from a central warm core and from a western region of high salinity. The near-freezing Ice Shelf Water produced flows northward into the Ross Sea.
                Bookmark

                Author and article information

                Journal
                Annals of Glaciology
                Ann. Glaciol.
                Cambridge University Press (CUP)
                0260-3055
                1727-5644
                1981
                January 20 2017
                1981
                : 2
                : 117-122
                Article
                10.3189/172756481794352478
                c65e5ed7-9c67-4d68-9944-6c0528efaa9f
                © 1981

                https://www.cambridge.org/core/terms

                History

                Comments

                Comment on this article