Show simple item record

dc.contributor.author
Nauer, Philipp A.
dc.contributor.author
Chiri, Eleonora
dc.contributor.author
Zeyer, Josef
dc.contributor.author
Schroth, Martin Herbert
dc.date.accessioned
2018-10-19T13:50:28Z
dc.date.available
2017-06-11T05:07:08Z
dc.date.available
2018-10-19T13:50:28Z
dc.date.issued
2014
dc.identifier.other
10.5194/bg-11-613-2014
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/80681
dc.identifier.doi
10.3929/ethz-b-000080681
dc.description.abstract
Investigations of sources and sinks of atmospheric CH4 are needed to understand the global CH4 cycle and climate-change mitigation options. Glaciated environments might play a critical role due to potential feedbacks with global glacial meltdown. In an emerging glacier forefield, an ecological shift occurs from an anoxic, potentially methanogenic subglacial sediment to an oxic proglacial soil, in which soil-microbial consumption of atmospheric CH4 is initiated. The development of this change in CH4 turnover can be quantified by soil-gas profile analysis. We found evidence for CH4 entrapped in glacier forefield soils when comparing two methods for the collection of soil-gas samples: a modified steel rod (SR) designed for one-time sampling and rapid screening (samples collected ∼1 min after hammering the SR into the soil), and a novel multilevel sampler (MLS) for repetitive sampling through a previously installed access tube (samples collected weeks after access-tube installation). In glacier forefields on siliceous bedrock, sub-atmospheric CH4 concentrations were observed with both methods. Conversely, elevated soil-CH4 concentrations were observed in calcareous glacier forefields, but only in samples collected with the SR, while MLS samples all showed sub-atmospheric CH4 concentrations. Time-series of SR soil-gas sampling (additional samples collected 2, 3, 5, and 7 min after hammering) confirmed the transient nature of the elevated soil-CH4 concentrations, which were decreasing from ∼100 μL L−1 towards background levels within minutes. This hints towards the existence of entrapped CH4 in calcareous glacier forefield soil that can be released when sampling soil-gas with the SR. Laboratory experiments with miniature soil cores collected from two glacier forefields confirmed CH4 entrapment in these soils. Treatment by sonication and acidification resulted in a massive release of CH4 from calcareous cores (on average 0.3–1.8 μg CH4 (g d.w.)−1) (d.w. – dry weight); release from siliceous cores was 1–2 orders of magnitude lower (0.02–0.03 μg CH4 (g d.w.)−1). Clearly, some form of CH4 entrapment exists in calcareous glacier forefield soils, and to a much lesser extent in siliceous glacier forefield soils. Its nature and origin remain unclear and will be subject of future investigations.
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Technical Note: Disturbance of soil structure can lead to release of entrapped methane in glacier forefield soils
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2014-02-04
ethz.journal.title
Biogeosciences
ethz.journal.volume
11
en_US
ethz.journal.issue
3
en_US
ethz.pages.start
613
en_US
ethz.pages.end
620
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Methane Turnover in Alpine Glacier Forefields
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
006289717
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::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03850 - McNeill, Kristopher / McNeill, Kristopher
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03335 - Zeyer, Josef (emeritus)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03850 - McNeill, Kristopher / McNeill, Kristopher
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03335 - Zeyer, Josef (emeritus)
ethz.grant.agreementno
137721
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.date.deposited
2017-06-11T05:09:04Z
ethz.source
ECIT
ethz.identifier.importid
imp593651a37483d84902
ethz.ecitpid
pub:126677
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-19T12:08:23Z
ethz.rosetta.lastUpdated
2019-01-02T14:52:06Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Technical%20Note:%20Disturbance%20of%20soil%20structure%20can%20lead%20to%20release%20of%20entrapped%20methane%20in%20glacier%20forefield%20soils&rft.jtitle=Biogeosciences&rft.date=2014&rft.volume=11&rft.issue=3&rft.spage=613&rft.epage=620&rft.au=Nauer,%20Philipp%20A.&Chiri,%20Eleonora&Zeyer,%20Josef&Schroth,%20Martin%20Herbert&rft.genre=article&
 Search via SFX

Files in this item

Thumbnail

Publication type

Show simple item record