Holocene vegetation and climate change at Canyon Lake, Copper River basin, Alaska
Thesis (M.S.) University of Alaska Fairbanks, 2009 "The regional vegetation response to Holocene warming and the recession of glacial Lake Atria is recorded by environmental proxies in cores from Canyon Lake, near the northern limit of the Copper River Basin. Pollen, spores, plant macrofossils,...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/12810 2023-05-15T18:40:35+02:00 Holocene vegetation and climate change at Canyon Lake, Copper River basin, Alaska Shimer, Grant 2009-05 http://hdl.handle.net/11122/12810 en_US eng http://hdl.handle.net/11122/12810 Department of Geology and Geophysics Paleobotany Paleoclimatology Copper River Watershed Holocene Thesis ms 2009 ftunivalaska 2023-02-23T21:37:59Z Thesis (M.S.) University of Alaska Fairbanks, 2009 "The regional vegetation response to Holocene warming and the recession of glacial Lake Atria is recorded by environmental proxies in cores from Canyon Lake, near the northern limit of the Copper River Basin. Pollen, spores, plant macrofossils, and stable isotope analyses of C, N and H indicate that conditions in the northern margins stabilized fairly quickly following the recession of Lake Atria around 10740 cal yr BP. The development of a shallow lake ecosystem surrounded by Betula (birch) shrub-tundra was followed by the migration of Picea (spruce) and Alnus (alder) into the Copper River Basin around 9800 cal yr BP and the eventual development of the Picea-dominated boreal forest that persists to this day. The stable isotope record indicates that lake systems are more sensitive to neoglacial cooling, Medieval warming, and the Little Ice Age than the surrounding boreal forest during the middle to late Holocene. The magnitude and severity of these events may have been limited in the Copper River Basin, but climate and vegetation change may have had significant effects on the available resources to the human populations of the region"--Leaf iii Bureau of Land Management Glennallen Field Office, Geology and Geophysics department at the University of Alaska Fairbanks, University of Alaska Museum of the North Geist Fund, Center for Global Change at UAF 1. Introduction -- 2. A 13000 cal yr BP record of paleoenvironmental change at Canyon Lake, Alaska -- 3. A holocene tephra identified in sediment cores from Canyon Lake, Copper River basin, Alaska -- 4. Conclusions -- Appendix. Thesis Tundra Alaska University of Alaska: ScholarWorks@UA Canyon Lake ENVELOPE(78.570,78.570,-68.603,-68.603) Fairbanks Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
topic |
Paleobotany Paleoclimatology Copper River Watershed Holocene |
spellingShingle |
Paleobotany Paleoclimatology Copper River Watershed Holocene Shimer, Grant Holocene vegetation and climate change at Canyon Lake, Copper River basin, Alaska |
topic_facet |
Paleobotany Paleoclimatology Copper River Watershed Holocene |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2009 "The regional vegetation response to Holocene warming and the recession of glacial Lake Atria is recorded by environmental proxies in cores from Canyon Lake, near the northern limit of the Copper River Basin. Pollen, spores, plant macrofossils, and stable isotope analyses of C, N and H indicate that conditions in the northern margins stabilized fairly quickly following the recession of Lake Atria around 10740 cal yr BP. The development of a shallow lake ecosystem surrounded by Betula (birch) shrub-tundra was followed by the migration of Picea (spruce) and Alnus (alder) into the Copper River Basin around 9800 cal yr BP and the eventual development of the Picea-dominated boreal forest that persists to this day. The stable isotope record indicates that lake systems are more sensitive to neoglacial cooling, Medieval warming, and the Little Ice Age than the surrounding boreal forest during the middle to late Holocene. The magnitude and severity of these events may have been limited in the Copper River Basin, but climate and vegetation change may have had significant effects on the available resources to the human populations of the region"--Leaf iii Bureau of Land Management Glennallen Field Office, Geology and Geophysics department at the University of Alaska Fairbanks, University of Alaska Museum of the North Geist Fund, Center for Global Change at UAF 1. Introduction -- 2. A 13000 cal yr BP record of paleoenvironmental change at Canyon Lake, Alaska -- 3. A holocene tephra identified in sediment cores from Canyon Lake, Copper River basin, Alaska -- 4. Conclusions -- Appendix. |
format |
Thesis |
author |
Shimer, Grant |
author_facet |
Shimer, Grant |
author_sort |
Shimer, Grant |
title |
Holocene vegetation and climate change at Canyon Lake, Copper River basin, Alaska |
title_short |
Holocene vegetation and climate change at Canyon Lake, Copper River basin, Alaska |
title_full |
Holocene vegetation and climate change at Canyon Lake, Copper River basin, Alaska |
title_fullStr |
Holocene vegetation and climate change at Canyon Lake, Copper River basin, Alaska |
title_full_unstemmed |
Holocene vegetation and climate change at Canyon Lake, Copper River basin, Alaska |
title_sort |
holocene vegetation and climate change at canyon lake, copper river basin, alaska |
publishDate |
2009 |
url |
http://hdl.handle.net/11122/12810 |
long_lat |
ENVELOPE(78.570,78.570,-68.603,-68.603) ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Canyon Lake Fairbanks Glacial Lake |
geographic_facet |
Canyon Lake Fairbanks Glacial Lake |
genre |
Tundra Alaska |
genre_facet |
Tundra Alaska |
op_relation |
http://hdl.handle.net/11122/12810 Department of Geology and Geophysics |
_version_ |
1766229974796206080 |