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在沿海沙沉积物中温室气体产生的季节性变化

Hao Zheng¹, Yanqing Feng¹, Yanshu Wang²

¹Key Laboratory of Marine Environmental Survey Technology and Application, South China Sea Marine Survey Center, Ministry of Natural Resources, Guangzhou 510300, China.

Marine pollution bulletin

|August 13, 2025

概括

沙沿海沉积物对温室气体 (GHG) 生产产生重大影响,温度是关键因素. 整合季节性数据对于准确的全球碳循环评估至关重要.

科学领域:

环境科学环境科学
地质化学地质化学
海洋生物学海洋生物学

背景情况:

在温室气体 (GHG) 生产和季节性动态方面,沙海岸沉积物研究不足.
了解它们在气候调节中的作用对于全球碳循环评估至关重要.
在这些沉积物中,还氧化控制的生物地球化学过程需要进一步研究.

研究的目的:

为了研究沙海岸沉积物中的季节性温室气体动态.
确定温室气体生产的主要环境驱动因素.
为了估计来自中国沿海沙沉积物的净温室气体流量.

主要方法:

在中国广东省沙沿海沉积物的实地采样.
对季节性温室气体生产率的分析.
皮尔森相关性分析以确定沉积物地质化学 (Fe2+,NO3-) 和温室气体生产之间的关系.
年度净温室气体流量的估计.

主要成果:

通过调节微生物动力学,温度被确定为温室气体生产的主要季节性驱动因素.
在Fe2+和温室气体生产之间发现了显著的正相关性.
在NO3-和CO2产量之间观察到显著的负相关性 (p < 0.05).
来自中国沿海沙沉积物 (顶部5厘米) 的年度净温室气体流量估计为-1.27 × 10^6 t CO2e.

结论:

季节性变化和沉积物组成是准确的全球温室气体库存的关键因素.
沙海岸沉积物在全球碳循环中发挥着重要作用,需要进一步研究.
温室气体评估的方法框架必须纳入这些动态参数.

关键词:

沿海地区的碳循环.温室气体生产 GHG 的生产沙沉积物的沙沉积物季节性变化季节性变化

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