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Recent variations in surface mass balance of the Antarctic Peninsula ice sheet

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Abstract:

Over the period 1972–98 the height of the snow surface at eight Antarctic sites in Palmer Land and on Alexander Island has been measured with respect to fixed points on local nunataks. From these data an empirical relation between height changes over a given period and three key variables has been derived. These variables are (i) the local mean annual surface air temperature, (ii) a regional estimate of energy available for melt over the period (derived from the nearby Rothera air-temperature record) and (iii) a regional estimate of accumulation over the period (derived from the nearby Gomez Nunatak ice-core accumulation record). Using this relation, the contribution of the Antarctic Peninsula to sea-level rise for warming from climatic conditions (averaged over the last 30 years) is estimated to be −0.006 ± 0.002 mm a−1 K−1. If recent warm condi- tions persist, however, and meltwater can run off to the sea, the contribution to sea-level rise from ablation is calculated to be −0.07 ± 0.02 mm a−1 K−1.

Document Type: Research Article

DOI: http://dx.doi.org/10.3189/172756504781830051

Publication date: March 1, 2004

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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