Sensitivity of the ice‐divide position in Greenland to climate change

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Model calculations of depth‐age relations for deep ice cores in central Greenland are sensitive to stability of the ice‐divide position. In addition, the folding of layers observed in the deep ice could be instigated by divide migration changing the velocity and particle paths of ice flow. We use simple steady‐state calculations to show that lateral divide migration of between 10 km and 50 km and elevation change of approximately 100 m is likely on glacial‐interglacial time scales, enough to affect model dating. The ice‐divide location appears to be most sensitive to the position of the ice‐sheet margins. By contrast, the ice‐divide elevation is most sensitive to the accumulation rate, the temperature profile, and the ice‐stiffness profile.

Original languageEnglish (US)
Pages (from-to)441-444
Number of pages4
JournalGeophysical Research Letters
Volume21
Issue number6
DOIs
StatePublished - Jan 1 1994

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Greenland
climate change
ice
sensitivity
ice flow
ice core
accumulation rate
temperature profile
folding
dating
timescale
temperature profiles
margins
profiles
calculation
particle

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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abstract = "Model calculations of depth‐age relations for deep ice cores in central Greenland are sensitive to stability of the ice‐divide position. In addition, the folding of layers observed in the deep ice could be instigated by divide migration changing the velocity and particle paths of ice flow. We use simple steady‐state calculations to show that lateral divide migration of between 10 km and 50 km and elevation change of approximately 100 m is likely on glacial‐interglacial time scales, enough to affect model dating. The ice‐divide location appears to be most sensitive to the position of the ice‐sheet margins. By contrast, the ice‐divide elevation is most sensitive to the accumulation rate, the temperature profile, and the ice‐stiffness profile.",
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Sensitivity of the ice‐divide position in Greenland to climate change. / Anandakrishnan, Sridhar; Alley, Richard B.; Waddington, E. D.

In: Geophysical Research Letters, Vol. 21, No. 6, 01.01.1994, p. 441-444.

Research output: Contribution to journalArticle

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