Motyka, Roman J; Fahnestock, Mark; Truffer, Martin (2010): Volume changes of Jacobshavn Isbrae between 1985, 1997 and 2007 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.817212, Supplement to: Motyka, RJ et al. (2010): Volume change of Jakobshavn Isbræ, West Greenland:: 1985-1997-2007. Journal of Glaciology, 56(198), 635-646, https://doi.org/10.3189/002214310793146304
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Abstract:
Following three decades of relative stability, Jakobshavn Isbrae, West Greenland, underwent dramatic thinning, retreat and speed-up starting in 1998. To assess the amount of ice loss, we analyzed 1985 aerial photos and derived a 40 m grid digital elevation model (DEM). We also obtained a 2007 40 m grid SPOT DEM covering the same region. Comparison of the two DEMs over an area of ~4000 km**2 revealed a total ice loss of 160 ± 4 km**3, with 107 ± 0.2 km**3 in grounded regions (0.27 mm eustatic sea-level rise) and 53 ± 4 km**3 from the disintegration of the floating tongue. Comparison of the DEMs with 1997 NASA Airborne Topographic Mapper data indicates that this ice loss essentially occurred after 1997, with +0.7 ± 5.6 km**3 between 1985 and 1997 and -160 ± 7 km**3 between 1997 and 2007. The latter is equivalent to an average specific mass balance of -3.7 ± 0.2 m/a over the study area. Previously reported thickening of the main glacier during the early 1990s was accompanied by similar-magnitude thinning outside the areas of fast flow, indicating that the land-based ice continued reacting to longer-term climate forcing.
Project(s):
Coverage:
Median Latitude: 69.090525 * Median Longitude: -49.777975 * South-bound Latitude: 68.843000 * West-bound Longitude: -50.132000 * North-bound Latitude: 69.333000 * East-bound Longitude: -49.560000
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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2 datasets
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Datasets listed in this publication series
- Motyka, RJ; Fahnestock, M; Truffer, M (2010): (Table 4) Summary of volume changes of Jacobshavn Isbrae during 1985-2007. https://doi.org/10.1594/PANGAEA.817210
- Motyka, RJ; Fahnestock, M; Truffer, M (2010): (Table 5) Elevation dependent volume changes of Jacobshavn Isbrae during 1985-1997. https://doi.org/10.1594/PANGAEA.817211