GEOSCAN Search Results: Fastlink


TitleSurface velocities of glaciers in western Canada from speckle-tracking of ALOS PALSAR and RADARSAT-2 data
AuthorVan Wychen, W; Copland, L; Jiskoot, H; Gray, L; Sharp, M; Burgess, DORCID logo
SourceCanadian Journal of Remote Sensing vol. 44, no. 1, 2018 p. 57-66,
Alt SeriesNatural Resources Canada, Contribution Series 20180116
PublisherInforma UK Limited
Mediaon-line; digital
File formatpdf; html
ProvinceBritish Columbia; Alberta
NTS83C/03; 83C/04; 83C/05; 83C/06; 92K; 92M; 92N; 104B; 104C; 104D; 104E; 104F; 104G; 104J; 104K; 104L; 104M; 104N; 105D; 114; 115A; 115B; 115C; 115F; 115G
AreaSt. Elias Mountains; Boundary Ranges; Coast Mountains; Alaska; Hubbard Glacier; Seward Glacier; Tweedsmuir Glacier; Lowell Glacier; Rocky Mountains; Columbia Mountains; Chaba Icefields; Clemenceau Icefields; Columbia Icefields; Canada; United States of America
Lat/Long WENS-145.0000 -130.0000 62.0000 56.0000
Lat/Long WENS-128.0000 -124.0000 52.0000 50.5000
Lat/Long WENS-118.0000 -117.0000 52.5000 52.0000
Subjectssurficial geology/geomorphology; environmental geology; Nature and Environment; glaciers; icefields; remote sensing; satellite imagery; radar methods; ice movement; ice flow; mapping techniques; climate; change detection; Climate change
Illustrationslocation maps; tables; geoscientific sketch maps
ProgramGSC Atlantic Division
Released2018 04 19
AbstractSpeckle-tracking of historically acquired ALOS PALSAR and RADARSAT-2 datasets are used to determine the dynamics of major glaciers and ice masses in western Canada over the past decade. For the icefields of the St. Elias Mountains and those that fringe the northern British Columbia/Alaska border, our results are largely consistent with earlier studies that used the same data, but different speckle-tracking techniques, to derive ice motion. However, our results are generally more spatially comprehensive than those previously published, in particular in fast-flowing regions such as Hubbard, Seward, Tweedsmuir and Lowell glaciers. We also produce new velocity maps for the icefields located in the Coast Mountains of southwestern British Columbia and for the Chaba, Clemenceau and Columbia icefields of the Rocky Mountains. Generally, faster flow is present on large ocean- and land-terminating outlet glaciers, particularly those in high accumulation maritime regions. These results, taken together with velocity maps of the Canadian Arctic and Yukon produced in previous studies, mean that baseline maps of glacier velocities determined from speckle tracking of SAR datasets are now available for nearly all the major ice masses of Canada.
Summary(Plain Language Summary, not published)
The dynamics of alpine glaciers in western Canada can have a significant impact on their mass balance through transport of mass from high elevation accumulation zones to low elevation ablation zones. Knowledge of the regional scale velocity structure of these features however remains poorly understood. This paper derives original baseline velocity measurements for glaciers and icefields to improve current and predicted mass loss rates from this region.

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