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Tree-ring cellulose δ18O records similar large-scale climate influences as precipitation δ18O in the Northwest Territories of Canada

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A Correction to this article was published on 08 December 2021

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Abstract

Stable oxygen isotopes measured in tree rings are useful for reconstructing climate variability and explaining changes in physiological processes occurring in forests, complementing other tree-ring parameters such as ring width. Here, we analyzed the relationships between different climate parameters and annually resolved tree-ring δ18O records (δ18OTR) from white spruce (Picea glauca [Moench]Voss) trees located near Tungsten (Northwest Territories, Canada) and used the NASA GISS ModelE2 isotopically-equipped general circulation model (GCM) to better interpret the observed relationships. We found that the δ18OTR series were primarily related to temperature variations in spring and summer, likely through temperature effects on the precipitation δ18O in spring, and evaporative enrichment at leaf level in summer. The GCM simulations showed significant positive relationships between modelled precipitation δ18O over the study region and surface temperature and geopotential height over northwestern North America, but of stronger magnitudes during fall-winter than during spring–summer. The modelled precipitation δ18O was only significantly associated with moisture transport during the fall-winter season. The δ18OTR showed similar correlation patterns to modelled precipitation δ18O only during spring–summer when water matters more for trees, with significant positive correlations with surface temperature and geopotential height, but no correlations with moisture transport. Overall, the δ18OTR records for northwestern Canada reflect the same significant large-scale climate patterns as precipitation δ18O for spring–summer, and therefore have potential for reconstructing past atmospheric dynamics in addition to temperature variability in the region.

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The data that support the findings of this study are available from the ITRDB database at the NOAA server (link) and Arctic Data Center (ADC).

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Acknowledgements

This research was supported by a Lamont-Doherty Earth Observatory Climate Center grant and by US National Science Foundation (NSF) Grants PLR-1504134, PLR-1603473, AGS-1502150 and OISE-1743738. A.L. was supported by a Marie Sklodowska-Curie Individual Fellowship under the European Union’s Horizon 2020 Research and Innovation Programme (Grant Agreement No: 838739 ECAW-ISO). F.G. was supported by the NSERC Discovery Grant RGPIN-2021-03553. We are thankful to Wei Huang from the Stable Isotope Laboratory for their support on isotopic measurements at the Lamont-Doherty Earth Observatory.

Funding

This research was supported by a Lamont-Doherty Earth Observatory Climate Center grant and by US National Science Foundation (NSF) Grants PLR-1504134, PLR-1603473, AGS-1502150 and OISE-1743738.

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RDF and LA-H design the study, conducted the analyses and wrote the manuscript with contributions from all authors. BHL and DM collected the samples and generated the reference tree-ring width chronology. LA-H and RO generated the isotopic chronology at the Lamont-Doherty Earth Observatory of Columbia University.

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Correspondence to Robert D. Field or Laia Andreu-Hayles.

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Field, R.D., Andreu-Hayles, L., D’arrigo, R.D. et al. Tree-ring cellulose δ18O records similar large-scale climate influences as precipitation δ18O in the Northwest Territories of Canada. Clim Dyn 58, 759–776 (2022). https://doi.org/10.1007/s00382-021-05932-4

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  • DOI: https://doi.org/10.1007/s00382-021-05932-4

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