Consistent summer temperature signals in a latewood blue intensity network from the upper tree line in the Caucasus
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10499411" target="_blank" >RIV/00216208:11310/25:10499411 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=SV1hYKlZ44" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=SV1hYKlZ44</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.dendro.2025.126372" target="_blank" >10.1016/j.dendro.2025.126372</a>
Alternative languages
Result language
angličtina
Original language name
Consistent summer temperature signals in a latewood blue intensity network from the upper tree line in the Caucasus
Original language description
Climate variability in the Caucasus region significantly influences tree growth in alpine tree line ecotones. However, long-standing human land-use history disrupted the natural equilibrium between montane forests and alpine meadows. These complex vegetation dynamics may cause traditional proxies such as tree-ring width (TRW) to display a weak climate signal, limiting their utility for understanding growth-climate relationships. To address these challenges, we established a multispecies network of seven tree ring width index (TRWI) and seven latewood blue intensity (LWBI) chronologies from three coniferous species (Picea orientalis, Abies nordmanniana and Pinus sylvestris) at current tree line sites (1900-2300 masl) in the Greater and Lesser Caucasus. Our results show that almost all the LWBI site chronologies demonstrate consistent and stable correlation with summer temperature (June-August). In contrast, corresponding TRWI chronologies reveal much weaker correlations with temperature, mainly with previous winter and spring. TRWI moderately responds to precipitation during the summer (JJA) while LWBI does not show any significant response to precipitation. The weaker and less consistent temperature signals in TRWI chronologies suggest additional influence of precipitation, non-climatic factors and local disturbance events on TRWI. Principal component analysis reveals a robust common signal in the LWBI network. First principal components from both proxies correlate with summer temperatures, although correlation is much higher for LWBI than for TRWI. The stable and consistent relationship between LWBI and summer temperature in different frequency domains indicates high potential of this proxy for annually resolved climate reconstructions at a regional level, which would be new for the Lesser Caucasus region.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10508 - Physical geography
Result continuities
Project
<a href="/en/project/EH22_008%2F0004605" target="_blank" >EH22_008/0004605: Natural and anthropogenic georisks</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Dendrochronologia
ISSN
1125-7865
e-ISSN
1612-0051
Volume of the periodical
92
Issue of the periodical within the volume
August
Country of publishing house
IT - ITALY
Number of pages
11
Pages from-to
126372
UT code for WoS article
001502628900003
EID of the result in the Scopus database
2-s2.0-105006772517