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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Main Author: Shimer, Grant
Format: Thesis
Language:English
Published: 2009
Subjects:
Online Access:http://hdl.handle.net/11122/12810
id ftunivalaska:oai:scholarworks.alaska.edu:11122/12810
record_format openpolar
spelling 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
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