Data di Pubblicazione:
2004
Citazione:
Dry calving processes at the ice cliff of Strandline Glacier, northern Victoria Land / G. Diolaiuti, C. Smiraglia, G. Vassena, M. Motta. - In: ANNALS OF GLACIOLOGY. - ISSN 0260-3055. - 39(2004), pp. 201-208.
Abstract:
This paper describes seasonal variations on Strandline Glacier, Terra Nova Bay, northern
Victoria Land, Antarctica, obtained from measurements during two field campaigns (2000/01 and
2002/03). By applying different methodologies and techniques, it was possible to calculate summer
changes in thickness (mean decrease over the whole glacier surface of 0.04mw.e.) and in volume
(decrease of 352m3 at the terminus). This serves to identify and quantify the processes responsible for
these variations (e.g. melting, evaporation, wind erosion/deposition and calving) and to understand the
energy transfers at the glacier–air interface. One particular feature of the glacier is the presence of an
ice cliff at the terminus, which causes ablation owing to dry calving. This process brought about a
summer retreat rate of 1mweek–1 in the central part of the front during the study period. Qualitative
observations carried out during previous field campaigns and quantitative analysis performed during the
last two expeditions have provided an understanding of the mechanism underlying the ablation
processes, thus confirming the available literature on this topic.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
G. Diolaiuti, C. Smiraglia, G. Vassena, M. Motta
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