(Article of periodic en Anglais - 2012)

Document title

Ablation of ice-cored moraine in a humid, maritime climate : Fox Glacier, New Zealand

Authors(s) and Affiliation(s)

BROOK M.S. (1) ; PAINE S. (2) ;
(1) Inst. of Natural Resources, Massey Univ., Palmerston North, NOUVELLE-ZELANDE
(2) Opus International Consultants Limited, Wellington, NOUVELLE-ZELANDE


To evaluate the effects of varying debris-cover and climate on ice-melt in a maritime mid-latitude setting, an 11-day ablation stake study was undertaken on ice-cored moraine at Fox Glacier. Ablation rates varied with enhancement of melt-rate under thin debris-covers. Air temperature from nearby Franz Josef Glacier allowed for a simple degree-day approach to ablation calculations, with regression relationships indicating air temperature is the key climatic control on melt. Digital elevation models produced from topographic surveys of the ice-cored moraine over the following months indicated that ablation rates progressively decreased over time, probably due to melt-out of englacial debris increasing debris-cover thickness. The morphology of the sandur appears to be strongly determined by episodic high-magnitude fluvial flows (jökulhlaups), in conjunction with surface melt. Thus, "hummocky" moraine appears to be a transient landform in this climatic setting


Article of periodic

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2012, vol. 94, no3 [pp. 339-349]

Bibliographic references : 2 p.

Collation : 7 fig.




Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1468-0459.2011.00442.x

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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