中亚冷门案例:西伯利亚松树的手指增长下降的新嫌疑人 CA 1700 CE
David M Meko1, Dina F Zhirnova2,3, Liliana V Belokopytova2,3
1Laboratory of Tree-Ring Research, University of Arizona, 1215 E. Lowell Street, Tucson, AZ 85721-0045, USA.
Plants (Basel, Switzerland)
|January 25, 2025
概括
1695年的一次火山喷发可能导致在小冰河时代期间西伯利亚的树木增长抑制. 极端天气,包括蒙古的"dzuds",加剧了影响,影响了阿尔泰-萨扬地区.
科学领域:
- 登德罗年代学 登德罗年代学
- 古气候学 古气候学
- 火山学 火山学是一门学科.
背景情况:
- 来自西伯利亚南部的 *Pinus sibirica* (西伯利亚松树) 的树环宽度年代表显示,在公元1700年左右,其多年生长率出现了异常的下降.
- 这一时期包括1524年至2022年区域时间表中最窄的七个环年,所有这些都在一个十年内.
研究的目的:
- 为了研究大约公元1700年左右树木生长中的"鼻子潜水"的时空范围.
- 为了确定导致增长抑制的因素,在小冰河时代的低夏季温度之外.
主要方法:
- 对 *Pinus sibirica* (14个地点) 和 *Larix sibirica* (西伯利亚) (61个地点) 的广泛树环时间表的分析.
- 整合现有的气候重建,自然档案,文档证据 (例如地震记录) 和气候地图.
- 利用20世纪的再分析数据进行气候测绘.
主要成果:
- 小冰河时代的低夏季气温在1695年至1704年之间被极端天气事件加剧,例如蒙古的"dzuds" (严酷的冬季条件).
- 1695年热带火山爆发被认为是这些干扰的主要触发因素.
- 大气循环的变化,可能是扩大了斯堪的纳维亚北半球的远程连接模式.
结论:
- 阿尔泰-萨扬地区的针树环和森林生产率记录了1695年火山事件的影响.
- 该研究强调了全球气候事件和区域生态反应的相互联系.
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