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Stable isotopes in Sphagnum fuscum peat as late-Holocene climate proxies in northeastern European Russia
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
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2013 (English)In: The Holocene, ISSN 0959-6836, E-ISSN 1477-0911, Vol. 23, no 10, 1381-1390 p.Article in journal (Refereed) Published
Abstract [en]

The environment of the northern taiga to tundra transition is highly sensitive to climate fluctuations. In this study from northeastern European Russia, stable carbon and oxygen isotope ratios (δ13C, δ18O) in α-cellulose of Sphagnum fuscum stems subsampled from hummocks and peat plateau profiles have been used as climate proxies. The entire isotope time series, dated by lead (210Pb), caesium (137Cs) and AMS-radiocarbon (14C) dating, spans the past 2500 years. Plant macrofossil analyses were used as an aid in single species selection, but are also helpful in identifying past surface moisture conditions. The most significant relationships were found between the recent δ13C record and summer (July–August) temperatures (R 2 = 0.58, p < 0.01), and the recent δ18O record and winter (October–May) precipitation anomalies in the tundra region (R 2 = 0.36, p < 0.01). The study demonstrates that stable isotopes preserved in northern peat deposits are useful indicators for summer temperature and winter precipitation at decadal to millennial timescales.

Place, publisher, year, edition, pages
2013. Vol. 23, no 10, 1381-1390 p.
Keyword [en]
climate, northern taiga, Sphagnum peat, stable isotopes, tundra
National Category
Geosciences, Multidisciplinary
Identifiers
URN: urn:nbn:se:su:diva-94114DOI: 10.1177/0959683613489580ISI: 000325710400002OAI: oai:DiVA.org:su-94114DiVA: diva2:651686
Available from: 2013-09-26 Created: 2013-09-26 Last updated: 2017-12-06Bibliographically approved

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Kaislahti Tillman, PäiviHolzkämper, SteffenHugelius, GustafKuhry, Peter
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