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dc.contributor.author
Niemann, Helge
dc.contributor.author
Stadnitskaia, Alina
dc.contributor.author
Wirth, Stefanie B.
dc.contributor.author
Gilli, Adrian
dc.contributor.author
Anselmetti, Flavio S.
dc.contributor.author
Sinninghe Damsté, Jaap S.
dc.contributor.author
Schouten, Stefan
dc.contributor.author
Hopmans, Ellen C.
dc.contributor.author
Lehmann, Moritz F.
dc.date.accessioned
2019-06-24T15:36:41Z
dc.date.available
2017-06-10T02:11:20Z
dc.date.available
2019-06-24T15:34:24Z
dc.date.available
2019-06-24T15:36:41Z
dc.date.issued
2012
dc.identifier.issn
1814-9324
dc.identifier.issn
1814-9332
dc.identifier.other
10.5194/cp-8-889-2012
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/51405
dc.identifier.doi
10.3929/ethz-b-000051405
dc.description.abstract
A novel proxy for continental mean annual air temperature (MAAT) and soil pH, the MBT/CBT-paleothermometer, is based on the temperature (T) and pH-dependent distribution of specific bacterial membrane lipids (branched glycerol dialkyl glycerol tetraethers – GDGTs) in soil organic matter. Here, we tested the applicability of the MBT/CBT-paleothermometer to sediments from Lake Cadagno, a high Alpine lake in southern Switzerland with a small catchment of 2.4 km2. We analysed the distribution of bacterial GDGTs in catchment soils and in a radiocarbon-dated sediment core from the centre of the lake, covering the past 11 000 yr. The distribution of bacterial GDGTs in the catchment soils is very similar to that in the lake's surface sediments, indicating a common origin of the lipids. Consequently, their transfer from the soils into the sediment record seems undisturbed, probably without any significant alteration of their distribution through in situ production in the lake itself or early diagenesis of branched GDGTs. The MBT/CBT-inferred MAAT estimates from soils and surface sediments are in good agreement with instrumental values for the Lake Cadagno region (~0.5 °C). Moreover, downcore MBT/CBT-derived MAAT estimates match in timing and magnitude other proxy-based T reconstructions from nearby locations for the last two millennia. Major climate anomalies recorded by the MBT/CBT-paleothermometer are, for instance, the Little Ice Age (~14th to 19th century) and the Medieval Warm Period (MWP, ~9th to 14th century). Together, our observations indicate the quantitative applicability of the MBT/CBT-paleothermometer to Lake Cadagno sediments. In addition to the MWP, our lacustrine paleo T record indicates Holocene warm phases at about 3, 5, 7 and 11 kyr before present, which agrees in timing with other records from both the Alps and the sub-polar North-East Atlantic Ocean. The good temporal match of the warm periods determined for the central Alpine region with north-west European winter precipitation strength implies a strong and far-reaching influence of the North Atlantic Oscillation on continental European T variations during the Holocene.
en_US
dc.format
application/pdf
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
Bacterial GDGTs in Holocene sediments and catchment soils of a high Alpine lake: application of the MBT/CBT-paleothermometer
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2012-05-07
ethz.journal.title
Climate of the Past
ethz.journal.volume
8
en_US
ethz.journal.issue
3
en_US
ethz.journal.abbreviated
Clim. past
ethz.pages.start
889
en_US
ethz.pages.end
906
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
005583758
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::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::03775 - Haug, Gerald H. / Haug, Gerald H.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::03775 - Haug, Gerald H. / Haug, Gerald H.
ethz.date.deposited
2017-06-10T02:11:33Z
ethz.source
ECIT
ethz.identifier.importid
imp59364f6859aed77189
ethz.ecitpid
pub:83867
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-20T17:08:11Z
ethz.rosetta.lastUpdated
2019-06-24T15:36:58Z
ethz.rosetta.versionExported
true
ethz.COinS
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