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dc.contributor.author
Morriss, Blaine F.
dc.contributor.author
Hawley, Robert L.
dc.contributor.author
Chipman, J.W.
dc.contributor.author
Andrews, L.C.
dc.contributor.author
Catania, Ginny A.
dc.contributor.author
Hoffman, M.J.
dc.contributor.author
Lüthi, M.P.
dc.contributor.author
Neumann, Thomas A.
dc.date.accessioned
2019-05-14T10:28:36Z
dc.date.available
2017-06-11T03:16:05Z
dc.date.available
2019-05-14T10:28:36Z
dc.date.issued
2013
dc.identifier.issn
1994-0416
dc.identifier.issn
1994-0424
dc.identifier.other
10.5194/tc-7-1869-2013
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/78369
dc.identifier.doi
10.3929/ethz-b-000078369
dc.description.abstract
The rapid drainage of supraglacial lakes introduces large pulses of meltwater to the subglacial environment and creates moulins, surface-to-bed conduits for future melt. Introduction of water to the subglacial system has been shown to affect ice flow, and modeling suggests that variability in water supply and delivery to the subsurface play an important role in the development of the subglacial hydrologic system and its ability to enhance or mitigate ice flow. We developed a fully automated method for tracking meltwater and rapid drainages in large (> 0.125 km2) perennial lakes and applied it to a 10 yr time series of ETM+ and MODIS imagery of an outlet glacier flow band in West Greenland. Results indicate interannual variability in maximum coverage and spatial evolution of total lake area. We identify 238 rapid drainage events, occurring most often at low (< 900 m) and middle (900–1200 m) elevations during periods of net filling or peak lake coverage. We observe a general progression of both lake filling and draining from lower to higher elevations but note that the timing of filling onset, peak coverage, and dissipation are also variable. Lake coverage is sensitive to air temperature, and warm years exhibit greater variability in both coverage evolution and rapid drainage. Mid-elevation drainages in 2011 coincide with large surface velocity increases at nearby GPS sites, though the relationships between ice-shed-scale dynamics and meltwater input are still unclear.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus Publications
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
A ten-year record of supraglacial lake evolution and rapid drainage in West Greenland using an automated processing algorithm for multispectral imagery
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2013-12-12
ethz.journal.title
The Cryosphere
ethz.journal.volume
7
en_US
ethz.pages.start
1869
en_US
ethz.pages.end
1877
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::08726 - Funk, Martin (Tit.-Prof.)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::08726 - Funk, Martin (Tit.-Prof.)
ethz.date.deposited
2017-06-11T03:19:02Z
ethz.source
ECIT
ethz.identifier.importid
imp5936517ae294930349
ethz.ecitpid
pub:123343
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-18T08:46:23Z
ethz.rosetta.lastUpdated
2019-05-14T10:29:00Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.atitle=A%20ten-year%20record%20of%20supraglacial%20lake%20evolution%20and%20rapid%20drainage%20in%20West%20Greenland%20using%20an%20automated%20processing%20algorithm%20for%20m&amp;rft.jtitle=The%20Cryosphere&amp;rft.date=2013&amp;rft.volume=7&amp;rft.spage=1869&amp;rft.epage=1877&amp;rft.issn=1994-0416&amp;1994-0424&amp;rft.au=Morriss,%20Blaine%20F.&amp;Hawley,%20Robert%20L.&amp;Chipman,%20J.W.&amp;Andrews,%20L.C.&amp;Catania,%20Ginny%20A.&amp;rft.genre=article&amp;
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