Morphological and ice-dynamical changes on the Tasman Glacier, New Zealand, 1990-2007

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dc.contributor.author Quincey, Duncan J.
dc.contributor.author Glasser, Neil F.
dc.date.accessioned 2010-12-15T10:52:02Z
dc.date.available 2010-12-15T10:52:02Z
dc.date.issued 2009-08-01
dc.identifier.citation Quincey , D J & Glasser , N F 2009 , ' Morphological and ice-dynamical changes on the Tasman Glacier, New Zealand, 1990-2007 ' Global and Planetary Change , vol 68 , no. 3 , pp. 185-197 . en
dc.identifier.other PURE: 155287
dc.identifier.other dspace: 2160/6002
dc.identifier.uri http://hdl.handle.net/2160/6002
dc.description Quincey, D.J., Glasser, N.F. (2009). Morphological and ice-dynamical changes on the Tasman Glacier, New Zealand, 1990-2007. Global and Planetary Change, 68 (3): 185-197 en
dc.description.abstract This paper presents data concerning recent (1990–2007) surface morphological and ice-dynamical changes on the Tasman Glacier, New Zealand. We use remote-sensing data to derive rates of lake growth, glacier velocities and rates of glacier surface lowering. Between 1990 and 2007, the glacier terminus receded ~ 3.5 km and a large ice-contact proglacial lake developed behind the outwash head. By 2007 the lake area was ~ 6 km2 and had replaced the majority of the lowermost 4 km of the glacier tongue. There is evidence that lake growth is proceeding at increasing rates — the lake area doubled between 2000 and 2007 alone. Measured horizontal glacier velocities decline from 150 m a− 1 in the upper glacier catchment to almost zero at the glacier terminus and there is a consequent down-glacier increase in surface debris cover. Surface debris mapping shows that a large catastrophic rockfall onto the glacier surface in 1991 is still evident as a series of arcuate debris ridges below the Hochstetter icefall. Calculated glacier surface lowering is most clearly pronounced around the terminal area of the glacier tongue, with down-wasting rates of 4.2 ± 1.4 m a− 1 in areas adjacent to the lateral moraine ridges outside of the current lake extent. Surface lowering rates of approximately 1.9 ± 1.4 m a− 1 are common in the upper areas of the glacier. Calculations of future lake expansion are dependent on accurate bathymetric and bed topography surveys, but published data indicate that a further 8–10 km of the glacier is susceptible to calving and further lake development in the future en
dc.format.extent 13 en
dc.language.iso eng
dc.relation.ispartof Global and Planetary Change en
dc.title Morphological and ice-dynamical changes on the Tasman Glacier, New Zealand, 1990-2007 en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.gloplacha.2009.05.003
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Centre for Glaciology en
dc.description.status Peer reviewed en


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