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Seasonal mass-balance gradients in Norway

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Previously discovered regularity in vertical profiles of net balance, bn(z), on ten glaciers in Norway also exists in profiles of both winter, bw(z), and summer, bs(z), seasonal balances. All three profiles, unlike those of many glaciers elsewhere in the world, are remarkably linear. Variations of gradients, dbw/dz and dbs/dz, from year to year are small and correlate poorly with glacier-total balances bw and bs. Glacier-to-glacier correlation is weak for both gradients but is strongly positive for bw and bs. There are two direct consequences of these properties of the gradients that apply to both seasonal balances bw and bs. First, because db/dz varies so little from year to year, the difference in balance, Δb, from year to year is nearly the same over the entire glacier, except near the top and bottom of its altitude range. Therefore, balance at a site near the middle of the altitude range of the glacier correlates very well with glacier-total balance. Second, this correlation, combined with the strong positive correlation of balance from glacier to glacier, is the reason balance at one altitude on one glacier correlates well with glacier-total balance at other nearby glaciers.

Document Type: Research Article

DOI: http://dx.doi.org/10.3189/172756505781828990

Publication date: December 1, 2005

More about this publication?
  • The Journal of Glaciology is published six times per year. It accepts submissions from any discipline related to the study of snow and ice. All articles are peer reviewed. The Journal is included in the ISI Science Citation Index.
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