Ice-push disturbances in high-Boreal and Subarctic lakeshore ecosystems since AD 1830, northern Québec, Canada
Ice scars on lakeshore trees were surveyed on the islands of two large lakes in northern Québec: Clearwater Lake (1270 km 2 ) and Bienville Lake (900 km 2 ), respectively at the southern edge of the Subarctic and at the northern limit of the Boreal zones. Correspondence of ice-scar chronologies with...
Published in: | The Holocene |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2000
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1191/095968300672152610 http://journals.sagepub.com/doi/pdf/10.1191/095968300672152610 |
id |
crsagepubl:10.1191/095968300672152610 |
---|---|
record_format |
openpolar |
spelling |
crsagepubl:10.1191/095968300672152610 2023-05-15T15:09:08+02:00 Ice-push disturbances in high-Boreal and Subarctic lakeshore ecosystems since AD 1830, northern Québec, Canada Bégin, Yves 2000 http://dx.doi.org/10.1191/095968300672152610 http://journals.sagepub.com/doi/pdf/10.1191/095968300672152610 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 10, issue 2, page 179-189 ISSN 0959-6836 1477-0911 Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change journal-article 2000 crsagepubl https://doi.org/10.1191/095968300672152610 2022-08-12T11:30:13Z Ice scars on lakeshore trees were surveyed on the islands of two large lakes in northern Québec: Clearwater Lake (1270 km 2 ) and Bienville Lake (900 km 2 ), respectively at the southern edge of the Subarctic and at the northern limit of the Boreal zones. Correspondence of ice-scar chronologies with hydrological and climatological instrumental registers indicated that shore ice pushes are due to lake floods. In the AD 1930s, a shift in the flood regimes occurred. In the high Boreal, ice-push activity was much more frequent prior to 1930 than in the Subarctic. Major regional ice pushes occurred in AD 1854, 1903, 1914, 1936, 1947, 1954,1959-60, 1970 and 1979. Prior to 1930, local major events were concentrated south of the Subarctic zone, but the situation inverted after 1930. A northward shift in the average position of the Arctic front is postulated as having been the driving force of local hydrologic regimes that allowed ice disturbances to occur, especially A in controlling the amount of snowfall. Ice scars provide proxy indicators of an increase in the frequency of snowy winters between the mid-1930s and 1980. The recent period of low levels represents an anomalous incursion in the century trend, but equivalent long episodes of low seasonal lake levels occurred prior to 1930. Article in Journal/Newspaper Arctic Subarctic SAGE Publications (via Crossref) Arctic Canada The Holocene 10 2 179 189 |
institution |
Open Polar |
collection |
SAGE Publications (via Crossref) |
op_collection_id |
crsagepubl |
language |
English |
topic |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
spellingShingle |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change Bégin, Yves Ice-push disturbances in high-Boreal and Subarctic lakeshore ecosystems since AD 1830, northern Québec, Canada |
topic_facet |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
description |
Ice scars on lakeshore trees were surveyed on the islands of two large lakes in northern Québec: Clearwater Lake (1270 km 2 ) and Bienville Lake (900 km 2 ), respectively at the southern edge of the Subarctic and at the northern limit of the Boreal zones. Correspondence of ice-scar chronologies with hydrological and climatological instrumental registers indicated that shore ice pushes are due to lake floods. In the AD 1930s, a shift in the flood regimes occurred. In the high Boreal, ice-push activity was much more frequent prior to 1930 than in the Subarctic. Major regional ice pushes occurred in AD 1854, 1903, 1914, 1936, 1947, 1954,1959-60, 1970 and 1979. Prior to 1930, local major events were concentrated south of the Subarctic zone, but the situation inverted after 1930. A northward shift in the average position of the Arctic front is postulated as having been the driving force of local hydrologic regimes that allowed ice disturbances to occur, especially A in controlling the amount of snowfall. Ice scars provide proxy indicators of an increase in the frequency of snowy winters between the mid-1930s and 1980. The recent period of low levels represents an anomalous incursion in the century trend, but equivalent long episodes of low seasonal lake levels occurred prior to 1930. |
format |
Article in Journal/Newspaper |
author |
Bégin, Yves |
author_facet |
Bégin, Yves |
author_sort |
Bégin, Yves |
title |
Ice-push disturbances in high-Boreal and Subarctic lakeshore ecosystems since AD 1830, northern Québec, Canada |
title_short |
Ice-push disturbances in high-Boreal and Subarctic lakeshore ecosystems since AD 1830, northern Québec, Canada |
title_full |
Ice-push disturbances in high-Boreal and Subarctic lakeshore ecosystems since AD 1830, northern Québec, Canada |
title_fullStr |
Ice-push disturbances in high-Boreal and Subarctic lakeshore ecosystems since AD 1830, northern Québec, Canada |
title_full_unstemmed |
Ice-push disturbances in high-Boreal and Subarctic lakeshore ecosystems since AD 1830, northern Québec, Canada |
title_sort |
ice-push disturbances in high-boreal and subarctic lakeshore ecosystems since ad 1830, northern québec, canada |
publisher |
SAGE Publications |
publishDate |
2000 |
url |
http://dx.doi.org/10.1191/095968300672152610 http://journals.sagepub.com/doi/pdf/10.1191/095968300672152610 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Subarctic |
genre_facet |
Arctic Subarctic |
op_source |
The Holocene volume 10, issue 2, page 179-189 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1191/095968300672152610 |
container_title |
The Holocene |
container_volume |
10 |
container_issue |
2 |
container_start_page |
179 |
op_container_end_page |
189 |
_version_ |
1766340363399725056 |