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

Details Sensitivity of the ice-divide position in Greenland to climate change Sensitivity of the ice-divide position in Greenland to climate change

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..441a&link_type=abstract

Geophysical Research Letters, Volume 21, Issue 6, p. 441-444

Physics

12

Hydrology: Glaciology, Meteorology And Atmospheric Dynamics: Paleoclimatology

Scientific paper

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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