Skip to main content Accessibility help
×
Home

Large-Scale Numerical Modelling of the Antarctic Ice Sheet

  • W.F. Budd (a1) and I.N. Smith (a1)

Abstract

A large-scale dynamic numerical model of the Antarctic ice sheet has been developed to study its present state of ice flow and mass balance as well as its response to long-term changes of climate or sea-level.

The flow of ice over a two-dimensional grid is determined from the ice thickness, the basal shear stress, the bedrock depth, and ice flow parameters derived from velocities of existing ice sheets. The change in ice thickness with time is governed by the continuity equation involving the ice flux divergence and the ice accumulation or ablation. At the ice sheet seaward boundary, a floating criterion and floating ice thinning rate apply. Bedrock depression with a time-delayed response dependent on the history of the ice load is also included.

A 61 × 61 point grid with 100 km spacing has been used to represent the ice-sheet surface, bedrock, and accumulation rate. The model has been used to simul a te the growth of the present ice sheet and i ts reaction to changes of sea-level, bedrock depression, accumulation rate, ice flow parameters, and the iceshelf thinning rate.

Preliminary results suggest that the present ice sheet is not in equilibrium but rather is still adjusting to changes of these 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.

      Large-Scale Numerical Modelling of the Antarctic Ice Sheet
      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.

      Large-Scale Numerical Modelling of the Antarctic Ice Sheet
      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.

      Large-Scale Numerical Modelling of the Antarctic Ice Sheet
      Available formats
      ×

Copyright

References

Hide All
Allison, I F 1979 The mass budget of the Lambert Glacier drainage basin, Antarctica. Journal ofGlaoiology 22(87): 223235
Bardin, V I, Suyetova, I A 1967 Basic morphometric characteristics for Antarctica and budget of the Antarctic ice cover. Japanese Antarctic Research Expedition. Scientific Reports. Special Issue 1:92100
Budd, W F 1966 The dynamics of the Amery Ice Shelf. Journal of Glaoiology 6(45): 335358
Budd, W F, Smith, I N 1981 The growth and retreat of ice sheets in response to orbital radiation changes. International Association of Hydrological Sciences Publication 131 (Symposium at Canberra 1979 — Sea level, ice and climatic change):369409
Budd, W F, Young, N W 1979 Results from the I.A.G.P.flow-line study inland of Casey,Wilkes Land,Antarctica. Journal of Glaoiology 24(90): 89101
Budd, W F, Landon-Smith, I H, Wishart, E R 1967 The Amery Ice Shelf.In Oura, H(ed)Physics of snow and ice: International conference on low temperature science...1966...Proceedings 1(2). Sapporo, Hokkaido University Institute of Low Temperature Science:447467
Budd, W F, Jenssen, D, Radok, U 1971 Derived physicalcharacteristics of the Antarctic ice sheet. ANARE Interim Reports Ser A (IV) Glaoiology(Publication 120)
Budd, W F, Keage, P L, Blundy, N A 1979 Empirical studies of ice sliding. Journal of Glaoiology 23(89): 157170
Budd, W F, Corry, M J, Jacka, T H 1982 Results fromthe Amery Ice Shelf Project. Annals of Glaoiology 3: 3641
Clausen, H B, Dansgaard, W, Nielsen, J 0, Clough, J W 1979 Surface accumulation on Ross Ice Shelf. Antarctic Journal of the United States 14(5): 6872
Crary, A P 1961 Glaciological studies at LittleAmerica station, Antarctica, 1957 and 1958. IGYGlaciological Report 5
Dorrer, E 1971 Movement of the Ward Hunt Ice Shelf, Ellesmere Island, N.W.T., Canada. Journal of Glaoiology 10(59): 211225
Greischar, L L, Bentley, C R 1980 Isostatic equilibrium grounding line between the West Antarctic inland ice sheet and the Ross Ice Shelf. Nature 283(5748): 651654
Holdsworth, G 1974 Erebus Glacier tongue, McMurdo Sound, Antarctica. Journal of Glaoiology 13(67): 2735
Hughes, T J, Denton, G H, Anderson, B G, Schilling, D H, Fastook, J L, Lingle, C S 1981 The last great ice sheets: a global view. In Denton, G H, Hughes, T J (eds) The last great ice sheets. New York etc, Wiley-Interscience: 263317
Jenssen, D 1977 A three-dimensional polar ice-sheet model. Journal of Glaciology 18(80): 373389
Kotlyakov, V M, Barkov, N I, Loseva, I A, Petrov, V N 1974 Novaya karta pitaniya lednikovogo pokrova Antarktidy [New map of the accumulation on the Antarctic ice sheet]. Materialy Glyatsiologicheskikh Issledovaniy. Kh.voni.ka. Obsuzhdeniya 24: 248255
Lingle, C S, Clark, J A 1979 Antarctic ice-sheet volume at 18 000 years B.P. and Holocene sealevel changes at the West Antarctic margin. Journal of Glaciology 24(90): 213230
Kotlyakov, V M, Barkov, N I, Loseva, I A, Petrov, V N 1974 Novaya karta pitaniya lednikovogo pokrova Antartidy [New map of the accumulation on the Antarctic ice sheet]. Materialy Glyatriologicheskikh Issledovaniy, Khronika. Obsuzhdeniya 24: 248255
Lingle, C S, Clark, J A 1979 Antarctic ice-sheet volume at 18000 years B.P. and Holocene sea-level changes at the West Antarctic margin. Journal of Glaciology 24(90): 213230
Morgan, V I, Jacka, T H 1981 Mass balance studies in East Antarctica. International Association of Hydrological Sciences Publication 131 (Symposium at Canberra 1979 — Sea level, ice and climatic change): 253260
Raynaud, D, Lorius, C, Budd, W F, Young, N W 1979 Ice flow along an I.A.G.P. flow line and interpretation of data from an ice core in Terre Ade"lie, Antarctica. Journal of Glaciology 24(90): 103115
Sanderson, T J 0 1979 Equilibrium profile of ice shelves. Journal of Glaciology 22(88): 435460
Schytt, V 1953 The Norwegian-British-Swedish Antarctic Expedition, 1949-52. 1. Summary of the glaciological work. Preliminary report. Journal of Glaciology 2(13): 204205
Swithinbank, C W M 1958 The movement of the ice shelf at Maudheim. Norwegian-British-Swedish Antarctic Expedition, 1949-52. Scientific Results 3C: 7796
Thomas, R H 1973[a] The creep of ice shelves: interpretation of observed behaviour. Journal of Glaciology 12(64): 5570
Thomas, R H 1973[b] The creep of ice shelves: theory. Journal of Glaciology 12(64): 4553
Thomas, R H 1976 Thickening of the Ross Ice Shelf and equilibrium state of the West Antarctic ice Sheet. Nature 259(5540): 180183
Thomas , R H, Bentley, C R 1978 The equilibrium state of the eastern half of the Ross Ice Shelf. Journal of Glaciology 20(84): 509518
Thomas, R H, Coslett, P H 1970 Bottom melting of ice shelves and the mass balance of Antarctica. Nature 228(5266): 4749
Weertman, J 1957 Deformation of floating ice shelves. Journal of Glaciology 3(21): 3842
Weertman, J 1974 Stability of the junction of an ice sheet and an ice shelf. Journal of Glaciology 13(67): 311
Young, N W 1979 Measured velocities of interior East Antarctica and the state of mass balance within the I.A.G.P. area. Journal of Glaciology 24(90): 7711 87

Large-Scale Numerical Modelling of the Antarctic Ice Sheet

  • W.F. Budd (a1) and I.N. Smith (a1)

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