由潮调节的微塑料运输的季节性变化:在度最高区域的基于质量的评估
Yue Wu1, Yijing Yang1, Libo Wu1
1State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen 361102, China.
Journal of hazardous materials
|December 2, 2025
概括
河口中的微塑料运输受到潮和度最大区 (TMZ) 动态的影响. 较重的微塑料积聚在底部,季节性变化影响了整体向海出口.
科学领域:
- 环境科学 环境科学
- 海洋学 海洋学 海洋学
- 海洋污染 海洋污染
背景情况:
- 河口是微塑料进入海洋环境的关键通道.
- 潮力量对河口内的微塑料的运输和分布产生重大影响.
研究的目的:
- 在潮河口的度最大区域 (TMZ) 中量化微塑料的丰度和质量.
- 研究潮周期,温度和循环对微塑料动态的影响.
- 为了确定TMZ中微塑料向海的净流量.
主要方法:
- 在TMZ内的两个潮周期中进行高分辨率采样.
- 基于质量的微塑料量化.
- 对微塑料分布相对于潮高度,温度和循环模式的分析 (例如, - 剪切共变率 - ESCO).
主要成果:
- 微塑料的数量和大小在海面下降,这表明碎片化和沉积.
- 较高的夏季温度和ESCO循环导致TMZ中微塑料的底部丰富.
- 底部微塑料度随着潮高度变化而变化,夏季表面响应滞后较短.
- 潮不对称和抽显著减少了颗粒数量的出口.
- 夏季 (19.41公斤/天-1),净向海流量明显高于冬季 (1.33公斤/天-1).
结论:
- 潮波动和ESCO循环是微塑料运输和河口积累的关键调节器.
- 季节性因素,特别是温度和分层,影响了微塑料的垂直交换和出口.
- 河口过程可以显著减轻微塑料的净向海流,影响它们在沿海水域的最终命运.
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