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|a Ice flow in Greenland for the International Polar Year 2008-2009 |h [electronic resource] |y English. |
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|a [S.l.] : |b American Geophysical Union, |c 2012. |
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|a Geophysical Research Letters Volume 39 |y English. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a A digital representation of ice surface velocity is essential
for a variety of glaciological, geologic and geophysical
analyses and modeling. Here, we present a new, reference,
comprehensive, high-resolution, digital mosaic of ice motion
in Greenland assembled from satellite radar interferometry
data acquired during the International Polar Year 2008 to
2009 by the Envisat Advanced Synthetic-Aperture Radar
(ASAR), the Advanced Land Observation System (ALOS)’s
Phase-Array L-band SAR (PALSAR) and the RADARSAT-1
SAR that covers 99% of the ice sheet in area. The best mapping
performance is obtained using ALOS PALSAR data
due to higher levels of temporal coherence at the L-band
frequency; but C-band frequency SAR data are less affected
by the ionosphere. The ice motion map reveals various flow
regimes, ranging from patterned enhanced flow into a few
large glaciers in the cold, low precipitation areas of north
Greenland; to diffuse, enhanced flow into numerous, narrow,
fast-moving glaciers in the warmer, high precipitation
sectors of northwest and southeast Greenland. We find that
the 100 fastest glaciers (v > 800 m/yr) drain 66% of the ice
sheet in area, marine-terminating glaciers drain 88% of
Greenland, and basal-sliding motion dominates internal
deformation over more than 50% of the ice sheet. This view
of ice sheet motion provides significant new constraints on ice
flow modeling. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15062088/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/20/88/00001/FI15062088_thm.jpg |
