热点火山排放作为海洋天然铁受精的来源
David González-Santana1, Melchor González-Dávila1, Aridane G González1
1Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, ULPGC, Spain.
The Science of the total environment
|November 22, 2024
概括
塔乔盖特火山爆发的火山灰大大改变了拉帕尔马的微量金属来源.
科学领域:
- 海洋地球化学 海洋地球化学
- 火山学 火山学是一门学科.
- 海洋学 海洋学 海洋学
背景情况:
- 海洋表面的微量金属通常来源于尘埃,河流和冰川融化.
- 在加拿大群岛,撒哈拉沙漠的尘埃是微量金属的主要来源.
- 火山爆发可以为海洋环境引入重要的新元素来源.
研究的目的:
- 调查塔乔盖特火山喷发对微量金属来源和沿海水域物种化的影响.
- 在喷发期间量化海水中的铁 (Fe) 度和尺寸分化.
- 将火山输入与典型的海洋微量金属来源进行比较.
主要方法:
- 在塔乔盖特火山喷发期间 (2021年9月-12月) 在拉帕尔马附近采集海水样本.
- 对微量金属度的分析,重点是铁 (Fe).
- 确定Fe的大小分成颗粒,体和可溶性相.
主要成果:
- 火山活动成为沿海水域铁 (Fe) 的主要来源,其度超过1900nmol L-1.1.
- 大约99%的铁在颗粒阶段 (>0.2μm).
- 可溶性Fe阶段虽然很小 (∼0.03%),但其度大约是典型的大西洋开放水域的10倍.
结论:
- 塔约盖特火山喷发显著改变了拉帕尔马海岸水域微量金属的主要来源.
- 铁 (Fe) 主要以颗粒形式供应,但可溶性分数大幅增加.
- 这项研究强调了在重大火山活动期间微量金属大小分化的动态演变.
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