较高的含量使城市内陆水域的二氧化碳排放更加容易
Yong-Mei Hou1, Fu-Jun Yue2, Si-Liang Li2
1Institute of Surface Earth System Science, School of Earth System Science, Tianjin University, Tianjin, 300072, China.
Journal of environmental management
|May 31, 2024
概括
城市内陆水是大气中二氧化碳 (CO2) 的重要来源. 高污染,特别是污水污染,通过化和酸化驱动二氧化碳排放,增加全球二氧化碳水平.
科学领域:
- 环境科学 环境科学
- 水生化学 水生化学
- 气候变化研究 气候变化研究
背景情况:
- 内陆水域对全球二氧化碳 (CO2) 排放做出了重大贡献,但对于营养投入和人类活动仍然存在不确定性.
- 城市内陆水域,以人为改造和高负荷为特征,作为二氧化碳排放的重要热点.
研究的目的:
- 为了研究二氧化碳部分压力 (pCO2) 和二氧化碳流量 (FCO2) 在中国天津城市内陆水域的时空模式.
- 阐明城市水生环境中水质,人为活动和二氧化碳排放之间的关系.
主要方法:
- 在典型的城市内陆水域进行pCO2和FCO2的现场采样和测量.
- 统计分析以将二氧化碳参数与水环境条件相关联,包括物种 (NH4+-N,NO3--N).
主要成果:
- 污染水中的pCO2水平过度和,达到大气平衡的9倍左右,特别是在污水和城市河流中.
- 在pCO2/FCO2和度 (NH4+-N/NO3--N) 之间的正相关性表明生态化学过程,如化,主导CO2排放.
- 天津城市地表水的二氧化碳总排放量很大 (286.8 Gg/年),只有在有机物含量低的水中观察到微小的二氧化碳吸收.
结论:
- 的生态化学过程,特别是化,通过酸化显著刺激城市内陆水域的二氧化碳生产和排放.
- 减少含量,污水排放和农业污染是减轻城市水生系统二氧化碳排放的关键策略.
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