上游增强了加利福尼亚当前系统中的粒子清理
Xinyun Cui1, Hannah M Adams2, Michael R Stukel3
1Department of Ocean Sciences, University of California Santa Cruz, Santa Cruz, California 95064, United States.
Environmental science & technology
|August 22, 2024
概括
沿海上游增加了41%的 (Hg) 沉降流量,这是由于初级生产的增加. 这一过程影响了循环和将送到深海,可能会影响甲基 (MMHg) 水平.
科学领域:
- 海洋生物地质化学海洋生物地质化学
- 微量金属海洋学研究
- 沿海生态系统的动力学
背景情况:
- 沿海上游提供初级生产必需的营养物质,但也引入有毒 (Hg).
- 海洋中的含量升高引发了人们对单甲 (MMHg) 的生物积累的担忧,影响人类和环境的健康.
研究的目的:
- 为了研究上游对加利福尼亚电流系统 (CCS) 水银循环的影响.
- 分析粒子清理和海空交换在上升事件期间水银的命运中的作用.
主要方法:
- 收集和分析悬浮和沉降颗粒样本从上升和非上升的水块.
- 在不同的上游条件下,在上层海洋中模拟库存和流量.
主要成果:
- 与海上地区相比,在上游地区观察到较高的总颗粒和沉降流量.
- 模型模拟量化显示,由于初级生产增加,上游增强了41%的沉流.
结论:
- 上升水源显著增加了来自海洋混合层的的沉降流.
- 通过沉没颗粒加强出口对于了解向深海的输送和潜在的MMHg形成至关重要.
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