Tree-ring blue intensity measurements from treeline sites in the Ural Mountains exhibit a strong summer temperature signal

IF 2.7 3区 农林科学 Q1 FORESTRY Dendrochronologia Pub Date : 2024-09-17 DOI:10.1016/j.dendro.2024.126267
Viktoria V. Agapova , Alberto Arzac , Vladimir V. Kukarskih , Ulf Büntgen , Jan Esper , Alexander V. Kirdyanov
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Abstract

The high northern latitudes offer an ideal environment to analyze tree growth responses to unprecedented recent warming. In this study, for the first time, we explore the dendroclimatological potential of latewood blue intensity (LWBI) and delta blue intensity (DBI) at two Siberian larch (Larix sibirica Ledeb.) sites in the upper treeline ecotone of the Ural Mountains, northern Russia. To assess the climate signals encoded in LWBI and DBI, as well as tree-ring width (TRW) and maximum latewood density (MXD), we correlated these parameter-specific chronologies against monthly temperature means, precipitation totals, and the SPEI index. LWBI and BDI exhibit robust and stable positive correlations with summer temperature, higher than TRW but slightly lower than MXD at both sites, with marginal negative effects from precipitation and strong negative correlations with SPEI. As direct surrogates for MXD, LWBI and DBI from larch trees offer reasonable alternatives as proxies for temperatures in northern latitudes.
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乌拉尔山脉树线地点的树环蓝强度测量显示出强烈的夏季温度信号
北部高纬度地区为分析树木生长对近期前所未有的气候变暖的反应提供了理想的环境。在本研究中,我们首次在俄罗斯北部乌拉尔山脉上层树线生态区的两个西伯利亚落叶松(Larix sibirica Ledeb.)地点探索了晚材蓝强度(LWBI)和三角洲蓝强度(DBI)的树木气候学潜力。为了评估 LWBI 和 DBI 以及树环宽度(TRW)和最大晚材密度(MXD)中编码的气候信号,我们将这些特定参数的年代学与月平均气温、降水总量和 SPEI 指数相关联。在两个地点,LWBI 和 BDI 与夏季气温呈稳健而稳定的正相关,高于 TRW,但略低于 MXD,降水略有负作用,与 SPEI 呈强负相关。作为 MXD 的直接替代指标,落叶松的 LWBI 和 DBI 为北纬地区的温度提供了合理的替代指标。
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来源期刊
Dendrochronologia
Dendrochronologia FORESTRY-GEOGRAPHY, PHYSICAL
CiteScore
5.50
自引率
13.30%
发文量
82
审稿时长
22.8 weeks
期刊介绍: Dendrochronologia is a peer-reviewed international scholarly journal that presents high-quality research related to growth rings of woody plants, i.e., trees and shrubs, and the application of tree-ring studies. The areas covered by the journal include, but are not limited to: Archaeology Botany Climatology Ecology Forestry Geology Hydrology Original research articles, reviews, communications, technical notes and personal notes are considered for publication.
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