Holocene climate change and landscape development from a low-Arctic tundra lake in the western Hudson Bay region of Manitoba, Canada
The low-Arctic region of western Hudson Bay in interior Canada is one of the most poorly described areas of North America in terms of Holocene climate history. Here, we present new data from a well-dated lake sediment core from northern Manitoba, Canada. We assemble one of the richest multi-proxy da...
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ftbowdoincollege:oai:digitalcommons.bowdoin.edu:eos-faculty-publications-1057 2023-05-15T14:51:55+02:00 Holocene climate change and landscape development from a low-Arctic tundra lake in the western Hudson Bay region of Manitoba, Canada Camill, Philip Umbanhowar, Charles E. Geiss, Christoph Hobbs, William O. Edlund, Mark B. Shinneman, Avery Cook Dorale, Jeffrey A. Lynch, Jason 2012-06-01T07:00:00Z https://digitalcommons.bowdoin.edu/eos-faculty-publications/58 unknown Bowdoin Digital Commons https://digitalcommons.bowdoin.edu/eos-faculty-publications/58 Earth and Oceanographic Science Faculty Work Arctic Diatom Fire Geochemistry Holocene Hudson Bay Lake Paleoclimate Peat Pollen Proxy XRF text 2012 ftbowdoincollege 2023-02-24T06:38:33Z The low-Arctic region of western Hudson Bay in interior Canada is one of the most poorly described areas of North America in terms of Holocene climate history. Here, we present new data from a well-dated lake sediment core from northern Manitoba, Canada. We assemble one of the richest multi-proxy datasets to date for a low-Arctic lake and characterize terrestrial and lake processes and exchanges between them. These proxies include fossil pollen and diatom assemblages, charcoal, magnetic properties (susceptibility and remanance), mineral grain size, bulk density, organic-matter content, elemental geochemistry, sediment cation (K , Mg , Ca , Fe /Fe ) and macronutrient (P, N, C) contents, biogenic-silica content, basal peat dates (wetland initiation), and stable isotopes (δ C, δ N). The sediment proxies record both broad- and fine-scale (millennial and sub-millennial) climate change. We find indirect evidence for a cool and dry post-glacial period from 9,000 to 6,500 cal yr BP, a warm and moist mid-Holocene period from 6,500 to 2,500 cal yr BP, and a cool and moist late-Holocene period from 2,500 cal yr BP to present. High-resolution geochemical data suggests 300- to 500-year-long dry periods at ~6,500-6,100, 5,300-5,000, 3,300-2,800, and 400-0 cal yr BP. These results suggest that terrestrial and aquatic ecosystem dynamics in the western Hudson Bay region are sensitive to past climate change and are likely to respond to future changes in temperature and precipitation. © 2012 Springer Science+Business Media B.V. + 2+ 2+ 2+ 3+ 13 15 Text Arctic Climate change Hudson Bay Tundra Bowdoin College: Bowdoin Digital Commons Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Bay Lake ENVELOPE(-100.964,-100.964,56.759,56.759) Canada Hudson Hudson Bay |
institution |
Open Polar |
collection |
Bowdoin College: Bowdoin Digital Commons |
op_collection_id |
ftbowdoincollege |
language |
unknown |
topic |
Arctic Diatom Fire Geochemistry Holocene Hudson Bay Lake Paleoclimate Peat Pollen Proxy XRF |
spellingShingle |
Arctic Diatom Fire Geochemistry Holocene Hudson Bay Lake Paleoclimate Peat Pollen Proxy XRF Camill, Philip Umbanhowar, Charles E. Geiss, Christoph Hobbs, William O. Edlund, Mark B. Shinneman, Avery Cook Dorale, Jeffrey A. Lynch, Jason Holocene climate change and landscape development from a low-Arctic tundra lake in the western Hudson Bay region of Manitoba, Canada |
topic_facet |
Arctic Diatom Fire Geochemistry Holocene Hudson Bay Lake Paleoclimate Peat Pollen Proxy XRF |
description |
The low-Arctic region of western Hudson Bay in interior Canada is one of the most poorly described areas of North America in terms of Holocene climate history. Here, we present new data from a well-dated lake sediment core from northern Manitoba, Canada. We assemble one of the richest multi-proxy datasets to date for a low-Arctic lake and characterize terrestrial and lake processes and exchanges between them. These proxies include fossil pollen and diatom assemblages, charcoal, magnetic properties (susceptibility and remanance), mineral grain size, bulk density, organic-matter content, elemental geochemistry, sediment cation (K , Mg , Ca , Fe /Fe ) and macronutrient (P, N, C) contents, biogenic-silica content, basal peat dates (wetland initiation), and stable isotopes (δ C, δ N). The sediment proxies record both broad- and fine-scale (millennial and sub-millennial) climate change. We find indirect evidence for a cool and dry post-glacial period from 9,000 to 6,500 cal yr BP, a warm and moist mid-Holocene period from 6,500 to 2,500 cal yr BP, and a cool and moist late-Holocene period from 2,500 cal yr BP to present. High-resolution geochemical data suggests 300- to 500-year-long dry periods at ~6,500-6,100, 5,300-5,000, 3,300-2,800, and 400-0 cal yr BP. These results suggest that terrestrial and aquatic ecosystem dynamics in the western Hudson Bay region are sensitive to past climate change and are likely to respond to future changes in temperature and precipitation. © 2012 Springer Science+Business Media B.V. + 2+ 2+ 2+ 3+ 13 15 |
format |
Text |
author |
Camill, Philip Umbanhowar, Charles E. Geiss, Christoph Hobbs, William O. Edlund, Mark B. Shinneman, Avery Cook Dorale, Jeffrey A. Lynch, Jason |
author_facet |
Camill, Philip Umbanhowar, Charles E. Geiss, Christoph Hobbs, William O. Edlund, Mark B. Shinneman, Avery Cook Dorale, Jeffrey A. Lynch, Jason |
author_sort |
Camill, Philip |
title |
Holocene climate change and landscape development from a low-Arctic tundra lake in the western Hudson Bay region of Manitoba, Canada |
title_short |
Holocene climate change and landscape development from a low-Arctic tundra lake in the western Hudson Bay region of Manitoba, Canada |
title_full |
Holocene climate change and landscape development from a low-Arctic tundra lake in the western Hudson Bay region of Manitoba, Canada |
title_fullStr |
Holocene climate change and landscape development from a low-Arctic tundra lake in the western Hudson Bay region of Manitoba, Canada |
title_full_unstemmed |
Holocene climate change and landscape development from a low-Arctic tundra lake in the western Hudson Bay region of Manitoba, Canada |
title_sort |
holocene climate change and landscape development from a low-arctic tundra lake in the western hudson bay region of manitoba, canada |
publisher |
Bowdoin Digital Commons |
publishDate |
2012 |
url |
https://digitalcommons.bowdoin.edu/eos-faculty-publications/58 |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) ENVELOPE(-100.964,-100.964,56.759,56.759) |
geographic |
Arctic Arctic Lake Bay Lake Canada Hudson Hudson Bay |
geographic_facet |
Arctic Arctic Lake Bay Lake Canada Hudson Hudson Bay |
genre |
Arctic Climate change Hudson Bay Tundra |
genre_facet |
Arctic Climate change Hudson Bay Tundra |
op_source |
Earth and Oceanographic Science Faculty Work |
op_relation |
https://digitalcommons.bowdoin.edu/eos-faculty-publications/58 |
_version_ |
1766323057441374208 |