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Baldcypress树木环中的水气候关系和稳定同位素分析

Jared M Friedman¹, Emily A Elliott², Clay S Tucker³

¹Department of Geography and the Environment, The University of Alabama, Box 870322, Tuscaloosa, AL 35401, United States of America.

The Science of the total environment

|September 20, 2025

概括

Baldcypress树的树环显示出重建过去的水气候极端的潜力. 它们的氧同位素 (δ¹⁸O) 可以追踪干旱和热带气旋 (TC) 降雨量,提供对气候变化的洞察力.

科学领域:

古气候学古气候学
登德罗年代学登德罗年代学
同位素水文学同位素水文学

背景情况:

水气极端的仪器记录是有限的.
考古重建对于评估沿海社区未来风险至关重要.
树环中的氧同位素 (δ¹⁸O) 是已知的水气候代理物,但以前没有在木中研究过.

研究的目的:

评价木中 δ¹⁸O 的使用,作为水气候极端的代理.
为了将 Baldcypress δ¹⁸O 与仪器气候数据和其他树种进行比较.
评估白 δ¹⁸O 在长期气候重建中的潜力.

主要方法:

从 (Taxodium distichum) 树的树环中收集和分析了 δ¹⁸ O .
与仪器气候数据 (降水量,流量,PDSI,温度) 的时间序列进行比较.
与热带气旋 (TC) 记录相关联的 δ¹⁸O 数据.
与长叶松 (Pinus palustris) 进行对干旱的敏感性比较.

主要成果:

Baldcypress δ¹⁸O 与降水,溪流,干旱指数和温度存在相关性.
Baldcypress δ¹⁸O 的显著下降表明区域的TC降水.
Baldcypress δ¹⁸O比长叶松 δ¹⁸O更容易受到干旱的影响.

结论:

Baldcypress 晚木中的 O 是重建水气候极端,特别是 TC 降水的可行代理.
Baldcypress δ¹⁸O 为了解过去的干旱状况提供了一个有价值的工具.
这种代理有很大的潜力用于脆弱的沿海地区的多变量气候重建.

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