Change search
ReferencesLink to record
Permanent link

Direct link
Palsa and peat plateau development in the Hudson Bay Lowlands, Canada: timing, pathways and causes
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
2008 (English)In: Boreas, ISSN 0300-9483, Vol. 37, no 2, 316-327 p.Article in journal (Refereed) Published
Abstract [en]

The Holocene development of a treed palsa bog and a peat plateau bog, located near the railroad to Churchill in the Hudson Bay Lowlands of northeastern Manitoba, was traced using peat macrofossil and radiocarbon analyses. Both sites first developed as wet rich fens through paludification of forested uplands around 6800 cal. yr BP. Results show a 20th-century age for the palsa formation and repeated periods of permafrost aggradation and collapse at the peat plateau site during the late Holocene. This timing of permafrost dynamics corroborates well with that inferred from previous studies on other permafrost peatlands in the same region. The developmental history of the palsa and peat plateau bogs is similar to that of adjacent permafrost-free fens, except for the specific frost heave and collapse features associated with permafrost dynamics. Permafrost aggradation and degradation is ascribed to regional climatic, local autogenic and other factors. Particularly the very recent palsa development can be assessed in terms of climatic changes as inferred from meteorological data and surface hydrological changes related to construction of the railroad. The results indicate that cold years with limited snowfall as well as altered drainage patterns associated with infrastructure development may have contributed to the recent palsa formation.

Place, publisher, year, edition, pages
2008. Vol. 37, no 2, 316-327 p.
URN: urn:nbn:se:su:diva-17671DOI: doi:10.1111/j.1502-3885.2007.00022.xISI: 000254932200012OAI: diva2:184192
Available from: 2009-01-26 Created: 2009-01-26 Last updated: 2011-01-10Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kuhry, Peter
By organisation
Department of Physical Geography and Quaternary Geology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 19 hits
ReferencesLink to record
Permanent link

Direct link