Kaislahti Tillman, Päivi; Holzkämper, Steffen; Kuhry, Peter; Sannel, A Britta K; Loader, Neil J; Robertson, Iain (2010): Radiocarbon dates, accumulation rates, δ¹³C and July temperature of profiles obtained from Selwyn and Misaw Lake, subarctic Canada [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.840495, Supplement to: Kaislahti Tillman, P et al. (2010): Long-term climate variability in continental subarctic Canada: A 6200-year record derived from stable isotopes in peat. Palaeogeography, Palaeoclimatology, Palaeoecology, 298(3-4), 235-246, https://doi.org/10.1016/j.palaeo.2010.09.029
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Abstract:
The rapid warming of arctic regions during recent decades has been recorded by instrumental monitoring, but the natural climate variability in the past is still sparsely reconstructed across many areas. We have reconstructed past climate changes in subarctic west-central Canada. Stable carbon and oxygen isotope ratios (d13C, d18O) were derived from a single Sphagnum fuscum plant component; alpha-cellulose isolated from stems. Periods of warmer and cooler conditions identified in this region, described in terms of a "Mediaeval Climatic Anomaly" and "Little Ice Age" were registered in the temperature reconstruction based on the d13C record. Some conclusions could be drawn about wet/dry shifts during the same time interval from the d18O record, humification indices and the macrofossil analysis. The results were compared with other proxy data from the vicinity of the study area. The amplitude of the temperature change was similar to that in chironomid based reconstructions, showing c. 6.5 ±2.3 °C variability in July temperatures during the past 6.2 ka.
Project(s):
Coverage:
Median Latitude: 59.879200 * Median Longitude: -103.959180 * South-bound Latitude: 59.866700 * West-bound Longitude: -104.216700 * North-bound Latitude: 59.916700 * East-bound Longitude: -102.566700
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:
2 datasets
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Datasets listed in this publication series
- Kaislahti Tillman, P; Holzkämper, S; Kuhry, P et al. (2010): (Table 2) Stable carbon isotopic ratios and July temperatures in Selwyn Lake profile S52 and Misaw Lake profile ML3. https://doi.org/10.1594/PANGAEA.840493
- Kaislahti Tillman, P; Holzkämper, S; Kuhry, P et al. (2010): (Table 1) 137Cs and AMS radiocarbon dates of peat profiles S52 and S53 obtained southeast of Selwyn Lake, Canada. https://doi.org/10.1594/PANGAEA.840492