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dc.contributor.author
Werder, Mauro
dc.contributor.author
Loye, Alexandre
dc.contributor.author
Funk, Martin
dc.date.accessioned
2020-07-21T12:58:16Z
dc.date.available
2017-06-14T13:38:22Z
dc.date.available
2019-08-22T08:27:27Z
dc.date.available
2019-08-22T09:32:05Z
dc.date.available
2019-08-22T09:43:22Z
dc.date.available
2020-07-21T12:58:16Z
dc.date.issued
2009
dc.identifier.other
10.3189/002214309790152447
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/157998
dc.identifier.doi
10.3929/ethz-b-000157998
dc.description.abstract
We present results of an investigation of two jökulhlaups (glacial lake outburst floods) at Gornergletscher, Switzerland, using dye-tracer experiments and complementary hydrological measurements. Repeated dye injections into moulins showed that tracer transit speeds were larger after the lake had emptied, but when proglacial discharge was still high, than during the main phase of the jökulhlaup. This counter-intuitive finding was modelled by tracer retardation inside the injection moulin. This model, together with an estimate of the maximum time the tracer takes to transit the injection moulin, allows us to calculate bounds on the transit speed in the main drainage channel where the lake water flows. These results indicate that the main drainage channel transit speeds are indeed highest during the peak of the flood. Moreover, it is known from a previous study that water amounting to half of the lake volume is temporarily stored within the glacier during a Gornergletscher jökulhlaup. Our observations suggest that this process occurred via lateral spreading of water at the glacier bed.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
International Glaciological Society
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.title
Dye tracing a jökulhlaup: I. Subglacial water transit speed and water-storage mechanism
en_US
dc.type
Journal Article
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2017-09-08
ethz.journal.title
Journal of Glaciology
ethz.journal.volume
55
en_US
ethz.journal.issue
193
en_US
ethz.pages.start
889
en_US
ethz.pages.end
898
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.notes
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
en_US
ethz.identifier.wos
ethz.identifier.nebis
000049356
ethz.publication.place
Cambridge
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-14T13:39:10Z
ethz.source
ECIT
ethz.identifier.importid
imp59364cf30c93398803
ethz.ecitpid
pub:36520
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T18:02:59Z
ethz.rosetta.lastUpdated
2020-07-21T12:58:27Z
ethz.rosetta.versionExported
true
ethz.COinS
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