Mapping tide-water glacier dynamics in east Greenland using landsat data

Journal of Glaciology
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Abstract

Landsat multispectral scanner and thematic mapper images were co-registered For the Kangerdlugssuaq Fjord region in East Greenland and were used to map glacier drainage-basin areas, changes in the positions of tide-water glacier termini and to estimate surface velocities of the larger tide-water glaciers. Statistics were compiled to document distance and area changes to glacier termini. The methodologies developed in this study are broadly applicable to the investigation of tide-water glaciers in other areas. The number of images available for consecutive years and the accuracy with which images are co-registered are key factors that influence the degree to which regional glacier dynamics can be characterized using remotely sensed data.

Three domains of glacier state were interpreted: net increase in terminus area in the southern part of the study area, net loss of terminus area for glaciers in upper Kangerdlugssuaq Fjord and a slight loss of glacier terminus area northward from Ryberg Fjord. Local increases in the concentrations of drifting icebergs in the fjords coincide with the observed extension of glacier termini positions Ice-surface velocity estimates were derived for several glaciers using automated image cross-correlation techniques The velocity determined for Kangerdlugssuaq Gletscher is approximately 5.0 km a−1 and that for Kong Christian IV Gletscher is 0.9 km a−1. The continuous presence of icebergs and brash ice in front of these glaciers indicates sustained rates of ice-front calving.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Mapping tide-water glacier dynamics in east Greenland using landsat data
Series title Journal of Glaciology
DOI 10.1017/S0022143000034900
Volume 41
Issue 139
Year Published 1995
Language English
Publisher International Glaciological Society
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 12 p.
First page 584
Last page 595
Country Greenland