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Estimates of ice-edge melt rates off Labrador and eastern Newfoundland, Canada

  • S. J. Prinsenberg (a1), I.K. Peterson (a1) and G.A. Fowler (a1)

Abstract

For the winters of 1985 to 1989, ice-edge melt rates off Labrador and eastern Newfoundland were calculated from ice charts and satellite-tracked ice beacon data. The ice charts provided ice-edge motion and ice thicknesses, while the beacons provided ice-drift rates and rates of ice-edge retreat. Over the continental slope, ice-edge melt rates, ice-drift rates and heat fluxes required to melt the ice were all higher than those over the continental shelf. Ice-edge melt rates had a mean value of 18.0 km d−1 over the slope but reduced to 4.8 km d−1 over the shelf. Similarly, the mean ice-drift rate was higher over the slope (41.5 km d−1) than over the shelf (12.7km d−1). Ice-edge melt rates increased linearly, as ice-drift rates perpendicular to the edge increased. Estimates of heat fluxes (±30%), required to melt the ice at the ice edge, reached values of 700 W m−2 for 3-day periods and had a mean of 340 W m−2 over the slope and 130 W m−2 over the shelf.

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References

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Ikeda, M., G. Symonds, and Yao., T. 1988. Simulated fluctuations in annual Labrador sea-ice cover. Atmo-sphere-Ocean, 26 (26), 16-39.
Josberger, E.G. 1987. Bottom ablation and heat transfer coefficients from the 1983 marginal ice zone experi-ments. J. Geophys. Res., 92 (C7), 7012-7016.
Maykut, G.A. and Untersteiner., N. 1971. Some results from a time-dependent thermodynamic model of sea ice. J. Geophys. Res., 76 (76), 1550-1575.
Peterson, I.K. and Symonds., G. 1988. Ice floe trajectories off Labrador and eastern Newfoundland: 1985-1987. Can. Teek. Rep. Hydrogr. Ocean Sci. 104.
World Meteorological Organization. 1970. Sea ice nomenclature. Geneva, World Meteorological Organization. (WMO Report 259.)
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Annals of Glaciology
  • ISSN: 0260-3055
  • EISSN: 1727-5644
  • URL: /core/journals/annals-of-glaciology
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