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Arctic amplification causes earlier onset of seasonal tree growth in northeastern Siberia

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KIRDYANOV Alexander V KOLMOGOROV Alexey I KRUSE Stefan HERZSCHUH Ulrike ARZAC Alberto PESTRYAKOVA Lyudmila A NIKOLAEV Anatoly N BEBCHUK Tatiana BÜNTGEN Ulf

Rok publikování 2024
Druh Článek v odborném periodiku
Časopis / Zdroj Environmental Research Letters
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://iopscience.iop.org/article/10.1088/1748-9326/ad845f
Doi http://dx.doi.org/10.1088/1748-9326/ad845f
Klíčová slova boreal forest; climatic change; dendroecology; global warming; northern treeline; tree rings
Popis Although recent warming affects the high-northern latitudes at an unprecedented rate, little is known about its impact on boreal forests because in situ observations from remote ecosystems in Siberia are sparse. Here, we analyse the radial growth and climate sensitivity of 54 Cajander larches (Larix cajanderi Mayr.) from three sites across the northern treeline ecotone within the Omoloy river basin in northeastern Siberia. Three independent tree-ring width chronologies span 279–499 years and exhibit distinct summer temperature signals. These records further reveal evidence for sufficiently earlier onsets of growing seasons since the middle of the 20th century. This phenological shift coincides with rapidly increasing May temperatures and associated earlier snowmelt. Our findings reinforce the importance of high-precision ground measurements from remote regions in Siberia to better understand how warming-induced changes in the functioning and productivity of the boreal forest influence carbon, nutrient, and water cycle dynamics.

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