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Kaislahti Tillman, Päivi; Holzkämper, Steffen; Kuhry, Peter; Sannel, A Britta K; Loader, Neil J; Robertson, Iain (2010): Meteorological observations, and 210Pb and 14C ages of peat profiles from subarctic Canada [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.786145, Supplement to: Kaislahti Tillman, P et al. (2010): Stable carbon and oxygen isotopes in Sphagnum fuscum peat from subarctic Canada: Implications for palaeoclimate studies. Chemical Geology, 270(1-4), 216-226, https://doi.org/10.1016/j.chemgeo.2009.12.001

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Abstract:
Stable carbon and oxygen isotope ratios in single plant components in Sphagnum peat have a good potential to reveal environmental changes in peat archives. Two peat profiles, covering the past ~6000 years, and a Sphagnum hummock from a discontinuous permafrost area in west central Canada were studied in order to evaluate the effect of decomposition rate on isotope records and to assess which plant components are most suitable for climate reconstructions. The stable isotope values from the most recently forming Sphagnum tissues were compared with observational climate data to study the impact of variations in temperature and precipitation on the peat isotopes. Our results show that there is high correlation between d13C values in alpha-cellulose isolated from Sphagnum fuscum stems and summer temperatures, whereas d18O in the plant tissues is controlled by several factors, such as summer precipitation, summer temperature and evaporation. According to our results, decomposition as derived from C/N values and colorimetry does not seem to affect the oxygen and carbon isotope values of alpha-cellulose from Sphagnum fuscum peat significantly. There is, however, a (quasi-) constant offset between the isotope values of branches and stems and between whole plant material and alpha-cellulose, which makes it crucial to select single moss-fractions when past climate and environmental changes are to be derived from the isotope record.
Keyword(s):
ipy
Project(s):
International Polar Year (2007-2008) (IPY)
Coverage:
Median Latitude: 59.956019 * Median Longitude: -103.053676 * South-bound Latitude: 57.350000 * West-bound Longitude: -111.970000 * North-bound Latitude: 64.300000 * East-bound Longitude: -94.066700
Date/Time Start: 1993-01-01T00:00:00 * Date/Time End: 2005-01-01T00:00:00
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Kaislahti Tillman, P; Holzkämper, S; Kuhry, P et al. (2010): (Table 2) 210Pb ages of peat accumulation in the hummock ML3, Misaw Lake, Canada. https://doi.org/10.1594/PANGAEA.786143
  2. Kaislahti Tillman, P; Holzkämper, S; Kuhry, P et al. (2010): (Appendix) Radiocarbon ages of peat profiles S52 and S53 obtained southeast of Selwyn Lake, Canada. https://doi.org/10.1594/PANGAEA.786144
  3. Kaislahti Tillman, P; Holzkämper, S; Kuhry, P et al. (2010): (Table 1) Mean annual temperatures and precipitation of meteorological stations accross Canada. https://doi.org/10.1594/PANGAEA.786142