Episodic and Systematic Tree Ring-Width Variation (AD 1763–2013) in the Takhini Valley, Southwest Yukon, Canada
A tree-ring analysis of 764 western white spruce (Picea albertiana) in the Takhini Valley of southwest Yukon was conducted to assess short- and long-term variation in growth and local climate. The resulting chronology spanned the period from AD 1763 to 2013. A polynomial regression (R = 0.720, p <...
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Online Access: | http://dx.doi.org/10.14430/arctic4685 https://journalhosting.ucalgary.ca/index.php/arctic/article/download/67723/51619 |
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crarcticinstna:10.14430/arctic4685 2024-06-09T07:41:46+00:00 Episodic and Systematic Tree Ring-Width Variation (AD 1763–2013) in the Takhini Valley, Southwest Yukon, Canada Strong, Wayne L 2017 http://dx.doi.org/10.14430/arctic4685 https://journalhosting.ucalgary.ca/index.php/arctic/article/download/67723/51619 unknown The Arctic Institute of North America http://creativecommons.org/licenses/by/4.0/ ARCTIC volume 70, issue 4 ISSN 1923-1245 0004-0843 journal-article 2017 crarcticinstna https://doi.org/10.14430/arctic4685 2024-05-14T12:53:43Z A tree-ring analysis of 764 western white spruce (Picea albertiana) in the Takhini Valley of southwest Yukon was conducted to assess short- and long-term variation in growth and local climate. The resulting chronology spanned the period from AD 1763 to 2013. A polynomial regression (R = 0.720, p < 0.001) indicated that the pre-1840 segment of the chronology had below-normal tree ring-width index (RWI) values (average 0.64, with modest variation), but the subsequent segment had greater variation and a steady increase in RWI values (average 0.89) until ~1920. After 1930, RWI values began to increase again (average 1.06) with 51% more variation than had previously occurred. Peak RWI values after 1930 were double those of the early 1800s. RWI values were uncorrelated with air temperature variables (except September minima), but weakly and positively correlated (r < 0.35) with precipitation variables. RWI values were moderately correlated with annual heat-moisture index values (r = −0.415, p < 0.001), although more strongly with RWI values less than 1.1 (R = −0.631, p < 0.001). Therefore, the RWI chronology was interpreted from an ecological moisture-balance perspective, with possible long-term temperature changes estimated from archival sources. The latter suggested a 2.1˚ – 3.1˚C rise since the early 1800s. Extreme RWI values and portions of the chronology were associated with known environmental events. Article in Journal/Newspaper Arctic Yukon Arctic Institute of North America Canada Takhini ENVELOPE(-135.094,-135.094,60.738,60.738) Yukon ARCTIC 70 4 |
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Open Polar |
collection |
Arctic Institute of North America |
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crarcticinstna |
language |
unknown |
description |
A tree-ring analysis of 764 western white spruce (Picea albertiana) in the Takhini Valley of southwest Yukon was conducted to assess short- and long-term variation in growth and local climate. The resulting chronology spanned the period from AD 1763 to 2013. A polynomial regression (R = 0.720, p < 0.001) indicated that the pre-1840 segment of the chronology had below-normal tree ring-width index (RWI) values (average 0.64, with modest variation), but the subsequent segment had greater variation and a steady increase in RWI values (average 0.89) until ~1920. After 1930, RWI values began to increase again (average 1.06) with 51% more variation than had previously occurred. Peak RWI values after 1930 were double those of the early 1800s. RWI values were uncorrelated with air temperature variables (except September minima), but weakly and positively correlated (r < 0.35) with precipitation variables. RWI values were moderately correlated with annual heat-moisture index values (r = −0.415, p < 0.001), although more strongly with RWI values less than 1.1 (R = −0.631, p < 0.001). Therefore, the RWI chronology was interpreted from an ecological moisture-balance perspective, with possible long-term temperature changes estimated from archival sources. The latter suggested a 2.1˚ – 3.1˚C rise since the early 1800s. Extreme RWI values and portions of the chronology were associated with known environmental events. |
format |
Article in Journal/Newspaper |
author |
Strong, Wayne L |
spellingShingle |
Strong, Wayne L Episodic and Systematic Tree Ring-Width Variation (AD 1763–2013) in the Takhini Valley, Southwest Yukon, Canada |
author_facet |
Strong, Wayne L |
author_sort |
Strong, Wayne L |
title |
Episodic and Systematic Tree Ring-Width Variation (AD 1763–2013) in the Takhini Valley, Southwest Yukon, Canada |
title_short |
Episodic and Systematic Tree Ring-Width Variation (AD 1763–2013) in the Takhini Valley, Southwest Yukon, Canada |
title_full |
Episodic and Systematic Tree Ring-Width Variation (AD 1763–2013) in the Takhini Valley, Southwest Yukon, Canada |
title_fullStr |
Episodic and Systematic Tree Ring-Width Variation (AD 1763–2013) in the Takhini Valley, Southwest Yukon, Canada |
title_full_unstemmed |
Episodic and Systematic Tree Ring-Width Variation (AD 1763–2013) in the Takhini Valley, Southwest Yukon, Canada |
title_sort |
episodic and systematic tree ring-width variation (ad 1763–2013) in the takhini valley, southwest yukon, canada |
publisher |
The Arctic Institute of North America |
publishDate |
2017 |
url |
http://dx.doi.org/10.14430/arctic4685 https://journalhosting.ucalgary.ca/index.php/arctic/article/download/67723/51619 |
long_lat |
ENVELOPE(-135.094,-135.094,60.738,60.738) |
geographic |
Canada Takhini Yukon |
geographic_facet |
Canada Takhini Yukon |
genre |
Arctic Yukon |
genre_facet |
Arctic Yukon |
op_source |
ARCTIC volume 70, issue 4 ISSN 1923-1245 0004-0843 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.14430/arctic4685 |
container_title |
ARCTIC |
container_volume |
70 |
container_issue |
4 |
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1801370402440609792 |