Till beneath ice stream B. 4. A coupled ice-till flow model

R. B. Alley, D. D. Blankenship, S. T. Rooney, C. R. Bentley

Research output: Contribution to journalArticlepeer-review

102 Scopus citations


An analytic, steady state solution for ice stream B shows that till viscosity decreases slowly downstream, probably in response to decreasing effective pressure downstream. Nonsteady numerical experiments with fixed ice thicknesses at the ends show that a marginal perturbation causes a wave of adjustment to travel the length of the ice stream in about 50 years, with a new steady state in about 200 years. Changes in till thickness tend to moderate perturbations in the ice and thus stabilize the system. -from Authors

Original languageEnglish (US)
Pages (from-to)8931-8940
Number of pages10
JournalJournal of Geophysical Research
Issue numberB9
StatePublished - 1987

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Materials Chemistry
  • Polymers and Plastics
  • Physical and Theoretical Chemistry


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