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dc.contributor.author
Vonk, Jorien E.
dc.contributor.author
Dickens, Angela F.
dc.contributor.author
Giosan, Liviu
dc.contributor.author
Hussain, Zainab A.
dc.contributor.author
Kim, Bokyung
dc.contributor.author
Zipper, Samuel C.
dc.contributor.author
Holmes, Robert M.
dc.contributor.author
Montluçon, Daniel B.
dc.contributor.author
Galy, Valier
dc.contributor.author
Eglinton, Timothy I.
dc.date.accessioned
2018-10-16T06:06:14Z
dc.date.available
2017-06-12T13:48:09Z
dc.date.available
2018-10-11T08:04:48Z
dc.date.available
2018-10-11T08:38:04Z
dc.date.available
2018-10-15T08:46:28Z
dc.date.available
2018-10-16T06:06:14Z
dc.date.issued
2016-08-17
dc.identifier.issn
2296-6463
dc.identifier.other
10.3389/feart.2016.00077
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/121285
dc.identifier.doi
10.3929/ethz-b-000121285
dc.description.abstract
Arctic deltas are dynamic and vulnerable regions that play a key role in land-ocean interactions and the global carbon cycle. Delta lakes may provide valuable historical records of the quality and quantity of fluvial fluxes, parameters that are challenging to investigate in these remote regions. Here we study lakes from across the Mackenzie Delta, Arctic Canada, that receive fluvial sediments from the Mackenzie River when spring flood water levels rise above natural levees. We compare downcore lake sediments with suspended sediments collected during the spring flood, using bulk (% organic carbon, % total nitrogen, δ^13C, Δ^14C) and molecular organic geochemistry (lignin, leaf waxes). High-resolution age models (^137Cs, ^210Pb) of downcore lake sediment records (n = 11) along with lamina counting on high-resolution radiographs show sediment deposition frequencies ranging between annually to every 15 years. Down-core geochemical variability in a representative delta lake sediment core is consistent with historical variability in spring flood hydrology (variability in peak discharge, ice jamming, peak water levels). Comparison with earlier published Mackenzie River depth profiles shows that (i) lake sediments reflect the riverine surface suspended load, and (ii) hydrodynamic sorting patterns related to spring flood characteristics are reflected in the lake sediments. Bulk and molecular geochemistry of suspended particulate matter from the spring flood peak and lake sediments are relatively similar showing a mixture of modern higher-plant derived material, older terrestrial permafrost material, and old rock-derived material. This suggests that deltaic lake sedimentary records hold great promise as recorders of past (century-scale) riverine fluxes and may prove instrumental in shedding light on past behavior of arctic rivers, as well as how they respond to a changing climate.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Frontiers Media
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Lignin
en_US
dc.subject
Biomarkers
en_US
dc.subject
Carbon isotopes
en_US
dc.subject
Lake sediments
en_US
dc.title
Arctic Deltaic Lake Sediments As Recorders of Fluvial Organic Matter Deposition
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2016-08-17
ethz.journal.title
Frontiers in Earth Science
ethz.journal.volume
4
en_US
ethz.journal.abbreviated
Front. earth sci.
ethz.pages.start
77
en_US
ethz.size
24 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
010260787
ethz.publication.place
Lausanne
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03868 - Eglinton, Timothy I. / Eglinton, Timothy I.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03868 - Eglinton, Timothy I. / Eglinton, Timothy I.
ethz.date.deposited
2017-06-12T13:54:25Z
ethz.source
ECIT
ethz.identifier.importid
imp593654c3ddfeb48150
ethz.ecitpid
pub:183379
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-15T10:28:57Z
ethz.rosetta.lastUpdated
2018-10-16T06:06:22Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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