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北极森林垃圾降落和沉积对大气度下降 (1987-2000) 的有限反应

Xiangwen Zhang¹, Haijun Peng², Stefan Osterwalder³

¹School of Resources & Environment, Nanchang University, Nanchang, 330031, China; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, SE-90183, Sweden.

Environmental pollution (Barking, Essex : 1987)

|July 27, 2025

概括

尽管大气中的含量下降,但北极森林中的沉积量保持稳定. 非叶子垃圾对沉积有很大的贡献,突出了生物因素的重要性.

科学领域:

环境科学环境科学
生物地质化学生物地质化学
森林生态森林生态

背景情况:

大气中的 (Hg) 通过森林垃圾的沉积是全球循环中的一个关键过程.
了解垃圾降落Hg沉积的时间动态和环境驱动因素至关重要,但仍然有限.

研究的目的:

评估14年 (1987-2000年) 的瑞典北极森林的各种垃圾组成部分的度和沉积流.
调查废弃物沉积的环境控制,特别是不同的废弃物类型和季节性变化的作用.

主要方法:

长期监测大气沉积中的度和垃圾单个组成部分 (针头,树枝,).
计算垃圾总量,沉积流量和分析时间趋势.
在生长和非生长季节之间的沉积的比较和与垃圾堆积生物质的相关性.

主要成果:

大气中的度下降了41%,针中的含量也相应下降.
垃圾总量沉积流量保持不变 (11.7±1.8μg m−2 yr−1),不受大气度下降的影响.
非叶子垃圾 (枝条,) 占总沉积量的56%,而由于垃圾生物量增加,在非生长季节的沉积量更高.

结论:

在北极森林中的垃圾沉积主要由垃圾组成和生产率等生物因素调节,而不是仅仅由大气中的水平.
非叶子垃圾对沉积的显著贡献,在循环研究中需要更加重视.
长期监测各种垃圾堆组成部分对于评估污染控制战略的有效性至关重要,例如"米纳马塔公约".

关键词:

大气Hg趋势趋势玻里埃尔森林玻里埃尔森林玻里埃尔森林几十年的动态.垃圾降落是因为垃圾降落.的流量是如何流动的季节性变化季节性变化

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