Identification and characteristics of surge-type glaciers on Novaya Zemlya, Russian Arctic

Grant, K., Stokes, C. and Evans, I. (2009) Identification and characteristics of surge-type glaciers on Novaya Zemlya, Russian Arctic. Journal of Glaciology, 55 (194). pp. 960-972. ISSN 0022-1430.

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Abstract

We present a comprehensive new inventory of surge-type glaciers on the Novaya Zemlya archipelago, using high-resolution (up to 4m) satellite imagery from 1976/77 (Hexagon), 1989 (Landsat TM), 2001 (Landsat ETM+) and 2006 (ASTER). A total of 692 glaciers and their forelands were observed for glaciological and geomorphological criteria indicative of glacier surging (e.g. looped moraines, heavy surface crevassing, surface potholes, thrust-block moraines, concertina eskers). This enabled the identification of 32 potential surge-type glaciers (compared with four previously identified) representing 4.6% of the total but 18% by glacier area. We assess the characteristics of surge-type glaciers. Surge-type glaciers are statistically different from non-surge-type glaciers in terms of their area, length, surface slope, minimum elevation, mid-range elevation and terminus type. They are typically long (median length 18.5 km), large (median area 106.8km2) outlet glaciers, with relatively low overall surface slopes (median slope 1.78) and tend to terminate in water (marine or lacustrine). They are predominantly directed towards and located in the more maritime western region of the Russian Arctic, and we suggest that surge occurrence might be related to large and complex catchment areas that receive increased delivery of precipitation from the Barents Sea.

Item Type: Article
Subjects: G Geography. Anthropology. Recreation > G Geography (General) > G0142 Aerial geography
G Geography. Anthropology. Recreation > G Geography (General) > G0575 Arctic and Antarctic regions
G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: pre Nov-2014 > Faculty of Social and Applied Sciences > Geographical and Life Sciences
Related URLs:
Depositing User: Dr Katie Wooldridge (nee Grant)
Date Deposited: 21 Jun 2013 10:45
Last Modified: 21 Jan 2016 14:47
URI: https://create.canterbury.ac.uk/id/eprint/12032

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Last edited: 29/06/2016 12:23:00