Post-glacial climatic change on Boothia Peninsula, Nunavut, Canada
A high temporal resolution pollen diagram from a lake in the middle-Arctic region of the Boothia Peninsula, Nunavut, Canada, documents the history of the regional vegetation and climate for the past 7200 years. A diatom sequence had been previously prepared from this core. Major tundra pollen taxa i...
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ftunivottawa:oai:ruor.uottawa.ca:10393/27432 2023-05-15T14:56:07+02:00 Post-glacial climatic change on Boothia Peninsula, Nunavut, Canada Zabenskie, Susan 2006 98 p. application/pdf http://hdl.handle.net/10393/27432 https://doi.org/10.20381/ruor-18703 en eng University of Ottawa (Canada) Source: Masters Abstracts International, Volume: 45-05, page: 2439. http://hdl.handle.net/10393/27432 http://dx.doi.org/10.20381/ruor-18703 Physical Geography Paleontology Thesis 2006 ftunivottawa https://doi.org/10.20381/ruor-18703 2021-01-04T17:09:06Z A high temporal resolution pollen diagram from a lake in the middle-Arctic region of the Boothia Peninsula, Nunavut, Canada, documents the history of the regional vegetation and climate for the past 7200 years. A diatom sequence had been previously prepared from this core. Major tundra pollen taxa in the core include Cyperaceae and Salix, with Cyperaceae comprising over 50% of the pollen in the early and late Holocene. Tree pollen, transported from far to the south, comprised a large percentage of the pollen sum, with Pinus accounting for 30% of the pollen in some levels of the core. Pollen percentages and concentrations of taxa typical of the middle-Arctic were highest in the mid-Holocene, corresponding to warm conditions. Decreasing pollen concentrations indicate cooling temperatures, with more rapid decreases occurring around 4200, 3800-3400, and 2500 cal yr BP. Pollen percentages of Salix, Cyperaceae, and Artemisia increased in the past 35 years in response to global warming. Reconstructions of July temperature using the modern analog technique showed the mid-Holocene (5800-2800 cal yr BP) was approximately 1°C higher than during the past 1000 years. Thesis Arctic Boothia Peninsula Global warming Nunavut Tundra uO Research (University of Ottawa - uOttawa) Arctic Boothia Peninsula ENVELOPE(-94.000,-94.000,71.001,71.001) Canada Nunavut |
institution |
Open Polar |
collection |
uO Research (University of Ottawa - uOttawa) |
op_collection_id |
ftunivottawa |
language |
English |
topic |
Physical Geography Paleontology |
spellingShingle |
Physical Geography Paleontology Zabenskie, Susan Post-glacial climatic change on Boothia Peninsula, Nunavut, Canada |
topic_facet |
Physical Geography Paleontology |
description |
A high temporal resolution pollen diagram from a lake in the middle-Arctic region of the Boothia Peninsula, Nunavut, Canada, documents the history of the regional vegetation and climate for the past 7200 years. A diatom sequence had been previously prepared from this core. Major tundra pollen taxa in the core include Cyperaceae and Salix, with Cyperaceae comprising over 50% of the pollen in the early and late Holocene. Tree pollen, transported from far to the south, comprised a large percentage of the pollen sum, with Pinus accounting for 30% of the pollen in some levels of the core. Pollen percentages and concentrations of taxa typical of the middle-Arctic were highest in the mid-Holocene, corresponding to warm conditions. Decreasing pollen concentrations indicate cooling temperatures, with more rapid decreases occurring around 4200, 3800-3400, and 2500 cal yr BP. Pollen percentages of Salix, Cyperaceae, and Artemisia increased in the past 35 years in response to global warming. Reconstructions of July temperature using the modern analog technique showed the mid-Holocene (5800-2800 cal yr BP) was approximately 1°C higher than during the past 1000 years. |
format |
Thesis |
author |
Zabenskie, Susan |
author_facet |
Zabenskie, Susan |
author_sort |
Zabenskie, Susan |
title |
Post-glacial climatic change on Boothia Peninsula, Nunavut, Canada |
title_short |
Post-glacial climatic change on Boothia Peninsula, Nunavut, Canada |
title_full |
Post-glacial climatic change on Boothia Peninsula, Nunavut, Canada |
title_fullStr |
Post-glacial climatic change on Boothia Peninsula, Nunavut, Canada |
title_full_unstemmed |
Post-glacial climatic change on Boothia Peninsula, Nunavut, Canada |
title_sort |
post-glacial climatic change on boothia peninsula, nunavut, canada |
publisher |
University of Ottawa (Canada) |
publishDate |
2006 |
url |
http://hdl.handle.net/10393/27432 https://doi.org/10.20381/ruor-18703 |
long_lat |
ENVELOPE(-94.000,-94.000,71.001,71.001) |
geographic |
Arctic Boothia Peninsula Canada Nunavut |
geographic_facet |
Arctic Boothia Peninsula Canada Nunavut |
genre |
Arctic Boothia Peninsula Global warming Nunavut Tundra |
genre_facet |
Arctic Boothia Peninsula Global warming Nunavut Tundra |
op_relation |
Source: Masters Abstracts International, Volume: 45-05, page: 2439. http://hdl.handle.net/10393/27432 http://dx.doi.org/10.20381/ruor-18703 |
op_doi |
https://doi.org/10.20381/ruor-18703 |
_version_ |
1766328158551801856 |