Exploring potential drivers of divergence in tree-ring based temperature reconstructions of NW North America

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F25%3A00639123" target="_blank" >RIV/86652079:_____/25:00639123 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/journal/dendrochronologia/vol/94/suppl/C" target="_blank" >https://www.sciencedirect.com/journal/dendrochronologia/vol/94/suppl/C</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.dendro.2025.126399" target="_blank" >10.1016/j.dendro.2025.126399</a>

Result language

angličtina

Original language name

Exploring potential drivers of divergence in tree-ring based temperature reconstructions of NW North America

Original language description

Non-stationary growth responses have been identified in tree-ring width (TRW) and maximum latewood density (MXD) chronologies of north-west North America. Here, we present MXD and latewood blue intensity (LWBI) data from two areas of the Yukon Territory (YT) to explore divergent climate-growth relationships until 2021 CE nand evaluate the underlying reasons considering different detrending methods and instrumental datasets. We examine divergent long-term trends and changing inter-annual signals using well-replicated chronologies inte grating a mixture of young and mature trees. Both tree-ring parameters correlate significantly (p < 0.05) with nMay–August temperatures, but the MXD results are stronger and show less divergence in trend. Variability among differently detrended MXD chronologies is smaller and a signal-free version of age-dependent spline detrending appears to be optimal for both YT sites. Comparison of instrumental data products reveals that the nhighest and most stable correlations are achieved using the Berkeley Earth dataset. Additionally, using different sub-diurnal temperatures affects both trend and correlation divergence with maximum temperature consistently showing the strongest and minimum temperature the weakest results. We conclude that regional divergence in the YT is characterized by trend rather than high-frequency issues and is larger in LWBI than MXD data. Altering ndetrending methods and diurnal temperatures is of greater importance than varying instrumental data products. Most stationary responses are recorded when applying signal-free age-dependent spline detrending to tree-ring data and targeting Berkeley Earth maximum temperatures. Disregarding these methodological choices may amplify divergence in YT MXD and LWBI calibration models.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40102 - Forestry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Dendrochronologia

ISSN

1125-7865

e-ISSN

1612-0051

Volume of the periodical

94

Issue of the periodical within the volume

Dec.

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

126399

UT code for WoS article

001565279100002

EID of the result in the Scopus database

2-s2.0-105014637772