Thermal regime of peatlands in subarctic eastern Canada
Temperatures were measured to 2 m depth at six peatland sites in the Schefferville area, northern Quebec, from July 1982 to September 1984. The sites varied in their plant cover, type of peat, and depth of snow, and two sites represented string and flark morphology. During the summers, the surface l...
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1987
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Online Access: | http://dx.doi.org/10.1139/e87-129 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-129 |
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crcansciencepubl:10.1139/e87-129 2023-12-17T10:50:47+01:00 Thermal regime of peatlands in subarctic eastern Canada Moore, T. R. 1987 http://dx.doi.org/10.1139/e87-129 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-129 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 24, issue 7, page 1352-1359 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1987 crcansciencepubl https://doi.org/10.1139/e87-129 2023-11-19T13:38:15Z Temperatures were measured to 2 m depth at six peatland sites in the Schefferville area, northern Quebec, from July 1982 to September 1984. The sites varied in their plant cover, type of peat, and depth of snow, and two sites represented string and flark morphology. During the summers, the surface layers (5 – 10 cm) reached temperatures of 15–20 °C and the 10 °C isotherm reached depths of 50–150 cm, depending on the site characteristics and the influence of the preceding winter conditions. The progression of the 10 °C isotherm downwards could be predicted from climatic variables, such as cumulative thawing degree-days. During the winter, the 0 °C isotherm reached depths of between 20 and 90 cm, based primarily on the thickness of the insulating snowpack and its development during the winter. The surface layers (5 – 20 cm) of the peat remain close to freezing (−1 to −3 °C), despite the very cold air temperatures (−20 to −30 °C). Examination of a cooling and a warming sequence at the string and flark sites reveals that the string near the surface is about 2 °C colder than the flark during the winter, and that during the early summer it can be 8 – 14 °C warmer than the flark. Differences in thermal regimes between sites and between seasons are interpreted in terms of the major climatic factors and the characteristics of the sites. Article in Journal/Newspaper Subarctic Canadian Science Publishing (via Crossref) Canada Canadian Journal of Earth Sciences 24 7 1352 1359 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Moore, T. R. Thermal regime of peatlands in subarctic eastern Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
Temperatures were measured to 2 m depth at six peatland sites in the Schefferville area, northern Quebec, from July 1982 to September 1984. The sites varied in their plant cover, type of peat, and depth of snow, and two sites represented string and flark morphology. During the summers, the surface layers (5 – 10 cm) reached temperatures of 15–20 °C and the 10 °C isotherm reached depths of 50–150 cm, depending on the site characteristics and the influence of the preceding winter conditions. The progression of the 10 °C isotherm downwards could be predicted from climatic variables, such as cumulative thawing degree-days. During the winter, the 0 °C isotherm reached depths of between 20 and 90 cm, based primarily on the thickness of the insulating snowpack and its development during the winter. The surface layers (5 – 20 cm) of the peat remain close to freezing (−1 to −3 °C), despite the very cold air temperatures (−20 to −30 °C). Examination of a cooling and a warming sequence at the string and flark sites reveals that the string near the surface is about 2 °C colder than the flark during the winter, and that during the early summer it can be 8 – 14 °C warmer than the flark. Differences in thermal regimes between sites and between seasons are interpreted in terms of the major climatic factors and the characteristics of the sites. |
format |
Article in Journal/Newspaper |
author |
Moore, T. R. |
author_facet |
Moore, T. R. |
author_sort |
Moore, T. R. |
title |
Thermal regime of peatlands in subarctic eastern Canada |
title_short |
Thermal regime of peatlands in subarctic eastern Canada |
title_full |
Thermal regime of peatlands in subarctic eastern Canada |
title_fullStr |
Thermal regime of peatlands in subarctic eastern Canada |
title_full_unstemmed |
Thermal regime of peatlands in subarctic eastern Canada |
title_sort |
thermal regime of peatlands in subarctic eastern canada |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/e87-129 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-129 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Canadian Journal of Earth Sciences volume 24, issue 7, page 1352-1359 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e87-129 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
24 |
container_issue |
7 |
container_start_page |
1352 |
op_container_end_page |
1359 |
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1785575857697325056 |