Skip to main content Accessibility help
×
×
Home

A Cross-Sectional Model for West Antarctica

  • B. J. McInnes (a1) and W. F. Budd (a2)
Abstract

The dynamic state of the West Antarctic ice sheet has been termed the grand problem of glaciology. An attempt is presented to assess it by simulating the observed ice thickness and ice velocities along a cross-section from ice stream B (Ross Sea) to Pine Island Glacier (Pine Island Bay) with a numerical model developed from the one described by Budd and McInnes (1978). A kinematic analysis with topographical and regime data from various sources shows the mass fluxes observed near the grounding line of the Ross Ice Shelf to be of the order expected for steady-state balance. Deformation of the ice accounts for only a small fraction of the observed flow there. Simulations (to be described in detail elsewhere) with the Budd/McInnes surging mechanism can approximate the existing ice thickness as a post-surge feature but fail to reproduce the high balance velocities. Both these velocities and the existing ice-thickness profile are simulated successfully as a state of steady sliding, with parameterizations involving the ice thickness above that corresponding to buoyancy and realistically assumed longitudinal strain-rates. A range of results is presented to illustrate the sensitivity of the simulation to changes in various parameters.

  • 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.

      A Cross-Sectional Model for West Antarctica
      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.

      A Cross-Sectional Model for West Antarctica
      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.

      A Cross-Sectional Model for West Antarctica
      Available formats
      ×
Copyright
References
Hide All
Bentley, C R, Cameron, R L, Bull, C, Kojima, K, Sow, A J 1964 Physical chavastevistics of the Antarctic ice sheet. New York, American Geographical Society (Antarctic Map Folio Series 2)
Budd, W F 1975 A first simple model for periodically self-surging glaciers. Journal of Glaciology 14(70): 321
Budd, W F, McInnes, B J 1974 Modeling periodically surging glaciers. Science 186(4167): 925927
Budd, W F, McInnes, B J 1976 A movie film illustrating the numerical modelling of periodically surging ice masses. Melbourne, University of Melbourne. Meteorology Department (Publication 21)
Budd, W F, McInnes, B J 1978 The periodically surging Medvezhiy glacier matched with a general ice flow model. Materialy Glyatsiologicheskikh Issledovaniy. Khronika. obsushdeniya 32: 247260
Budd, W F, McInnes, B J 1979 Periodic surging of the Antarctic ice sheet – an assessment by modelling. Hydrological Sciences Bulletin 24(1): 95104
Budd, W F, Smith, I N 1982 Large-scale numerical modelling of the Antarctic ice sheet. Annals of Glaciology 3: 4249
Budd, W F, Jenssen, D, Radok, U 1971 Derived physical characteristics of the Antarctic ice sheet. AN ARE Interim Reponte Ser A(IV) Glaciology (Publication 120
Budd, W F, Keage, P L, Blundy, N A 1979 Empirical studies of ice sliding. Journal of Glaciology 23(89): 157170
Budd, W F, Jenssen, D, Smith, I N 1984 A three-dimensional time-dependent model of the West Antarctic ice sheet. Annals of Glaciology 5: 2936
Bull, C 1971 Snow accumulation in Antarctica. In Quam, L O (ed) Research in the Antarctic. A symposium presented at the Dallas meeting of the American Association for the Advancement of Science – December 1968. Washington, DC, American Association for the Advancement of Science: 367421
Crabtree, R D, Doake, C S M 1982 Pine Island Glacier and its drainage basin: results from radio echo-sounding. Annals of Glaciology 3: 6570
Crary, A P, Robinson, E S, Bennett, H F, Boyd, W W Jr 1962 Glaciological studies of the Ross Ice Shelf, Antarctica 1957–1960. IGY Glaciological Report 6
Drewry, D J, Jordan, S R 1980 Compilation of an Antarctic glaciological and geophysical folio. Polar Record 20(126): 288
Hughes, T 1973 Is the West Antarctic ice sheet disintegrating? Journal of Geophysical Research. 78(33): 78847910
Jankowski, E J, Drewry, D J 1981 The structure of West Antarctica from geophysical studies. Nature 291(5810): 1721
Jenssen, D 1977 A three-dimensional polar ice-sheet model. Journal of Glaciology 18(80): 373389
Lingle, C S, Hughes, T J, Kollmeyer, R C 1981 Tidal flexure of Jakobshavns glacier, West Greenland. Journal of Geophysical Research 86(B5): 39603968
McInnes, B J 1982 Equilibrium profiles of a cross section through central Greenland. In Radok, U, Barry, R G, Jenssen, D, Keen, R A, Kiladis, G N, McInnes, B J 1982 Climatic and physical characteristics of the Greenland ice sheet. Boulder, CO, University of Colorado. Cooperative Institute for Research in Environmental Sciences: A 4.14.13
Rose, K E 1979 Characteristics of ice flow in Marie Byrd Land, Antarctica. Journal of Glaciology 24(90): 6375
Thomas, R H 1976 The distribution of 10 m temperatures on the Ross Ice Shelf. Journal of Glaciology 16(74): 111117
Thomas, R H, MacAyeal, D R 1982 Derived characteristics of the Ross Ice Shelf, Antarctica. Journal of Glaciology 28(100): 397412
Weertman, J 1976 Glaciology’s grand unsolved problem. Nature 260(5549): 284286
Whillans, I M 1979 Ice flow along the Byrd station Strain network, Antarctica. Journal of Glaciology 24(90): 1528
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Annals of Glaciology
  • ISSN: 0260-3055
  • EISSN: 1727-5644
  • URL: /core/journals/annals-of-glaciology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

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