被遗忘的巨人:在被抛光的树上强大的气候信号
J M Olano1, M A García-López1, G Sangüesa-Barreda1
1iuFOR, EiFAB, Campus de Soria, Universidad de Valladolid, E-42004 Soria, Spain.
The Science of the total environment
|August 27, 2023
概括
在人类管理的景观中常见的树提供了宝贵的高分辨率气候数据. 这些古老的树木为地中海地区提供了重要的水气候洞察力,但随着它们的衰退,需要紧急研究.
科学领域:
- 登德罗年代学和古气候学.
- 森林生态与森林管理
- 地中海气候研究 地中海气候研究
背景情况:
- 传统的树环气候重建通常依赖于偏远,不受干扰的地区的老树.
- 人类管理的森林,比如那些有树的森林,尽管它们的年龄和活力,但它们对气候数据的利用不足.
- 欧洲历史悠久的管理实践 - - 树,可以显著地延长树木的寿命.
研究的目的:
- 评估树作为过去气候信号的记录器的潜力.
- 为了测试被抛光的树木是否反映了当前和历史管理期间的水供应.
- 评估不同林地树环时间表的相关性,表明区域气候强迫.
主要方法:
- 在大陆地中海气候下,在西班牙中部采样了四个杆树林.
- 在911个月的时间内,分析了对标准化降雨-蒸发指数 (SPEI) 的树环反应.
- 在有或没有传统抛光管理的时期比较气候信号强度.
主要成果:
- 超过500年的树对SPEI有很强的反应.
- 在最近的低管理时期 (1962年至2022年) 在三个地点发现了显著的气候信号 (r2 = 0.4430.655).
- 大约70%的气候信号可以从传统的管理时期 (1902年至1961年) 获取,采用异步抛光.
结论:
- 在地中海地区,树森林具有巨大的潜力,可以进行高分辨率的水气候重建.
- 来自不同地点的树环时间表显著相关,证实了共同的区域气候强迫.
- 由于它们的衰退状况和数据检索的时间窗口的关闭,对杆树的紧急研究至关重要.
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