Arctic tree rings as recorders of variations in light availability

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Arctic tree rings as recorders of variations in light availability

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Title: Arctic tree rings as recorders of variations in light availability
Author: Stine, A. R.; Huybers, P.

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Citation: Stine, A. R., and P. Huybers. 2014. “Arctic tree rings as recorders of variations in light availability.” Nature Communications 5 (1): 3836. doi:10.1038/ncomms4836. http://dx.doi.org/10.1038/ncomms4836.
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Abstract: Annual growth ring variations in Arctic trees are often used to reconstruct surface temperature. In general, however, the growth of Arctic vegetation is limited both by temperature and light availability, suggesting that variations in atmospheric transmissivity may also influence tree-ring characteristics. Here we show that Arctic tree-ring density is sensitive to changes in light availability across two distinct phenomena: explosive volcanic eruptions (P<0.01) and the recent epoch of global dimming (P<0.01). In each case, the greatest response is found in the most light-limited regions of the Arctic. Essentially no late 20th century decline in tree-ring density relative to temperature is seen in the least light-limited regions of the Arctic. Consistent results follow from analysis of tree-ring width and from individually analysing each of seven tree species. Light availability thus appears an important control, opening the possibility for using tree rings to reconstruct historical changes in surface light intensity.
Published Version: doi:10.1038/ncomms4836
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4024743/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:12406908
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