Sannel, A Britta K; Kuhry, Peter (2008): Radiocarbon dating of peat profiles from the subarctic ecoclimatic region, west-central Canada [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.786457, Supplement to: Sannel, ABK; Kuhry, P (2008): Long-term stability of permafrost in subarctic peat plateaus, west-central Canada. The Holocene, 18(4), 589-601, https://doi.org/10.1177/0959683608089658
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Abstract:
Long-term vegetation succession and permafrost dynamics in subarctic peat plateaus of west-central Canada have been studied through detailed plant macrofossil analysis and extensive AMS radiocarbon dating of two peat profiles. Peatland inception at these sites occurred around 5800-5100 yr BP (6600-5900 cal. BP) as a result of paludification of upland forests. At the northern peat plateau site, located in the continuous permafrost zone, palaeobotanical evidence suggests that permafrost was already present under the forested upland prior to peatland development. Paludification was initiated by permafrost collapse, but re-aggradation of permafrost occurred soon after peatland inception. At the southern site, located in the discontinuous permafrost zone, the aggradation of permafrost occurred soon after peatland inception. In the peat plateaus, permafrost conditions have remained very stable until present. Sphagnum fuscum-dominated stages have alternated with more xerophytic communities characterized by ericaceous shrubs. Local peat fires have occurred, but most of these did not cause degradation of the permafrost. Starting from 2800-1100 yr BP (2900-1000 cal. BP) consistently dry surface conditions have prevailed, possibly related to continued frost heave or nearby polygon crack formation.
Project(s):
Coverage:
Median Latitude: 59.762652 * Median Longitude: -100.411897 * South-bound Latitude: 57.383300 * West-bound Longitude: -104.216700 * North-bound Latitude: 61.633300 * East-bound Longitude: -94.200000
Date/Time Start: 1963-01-01T00:00:00 * Date/Time End: 2002-08-30T00:00:00
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
- Sannel, ABK; Kuhry, P (2008): (Table 2) Basal and upper radiocarbon dates from peatlands located within the low and high subarctic regions, Canada. https://doi.org/10.1594/PANGAEA.786455
- Sannel, ABK; Kuhry, P (2008): (Table 1) Radiocarbon dates and calibrated ages of peat profiles from Selwyn and Ennadai lake, Canada. https://doi.org/10.1594/PANGAEA.786454