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二氧化碳来源的转移模式沉没在一个亚热带城市化的轻微环保的湖泊

Rongjie Yang¹, Huixing Song², Qiao Qin³

¹School of Tourism and Culture Industry, Chengdu University, Chengdu 610106, China; College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China.

The Science of the total environment

|July 4, 2024

概括

城市湖泊在每天和季节性地吸收和排放二氧化碳 (CO2) 之间发生变化. 光合作用和呼吸驱动这些变化,受到城市化营养素的影响,影响湖泊的碳循环.

科学领域:

环境科学环境科学
生物地质化学生物地质化学
临界技术临界技术

背景情况:

城市化对淡水湖泊生态系统产生重大影响,特别是碳生物地球化学循环.
了解城市绿化湖中的二氧化碳 (CO2) 吸收和排放动态至关重要,但有限.
湖泊中的水空气界面在气体交换中起着关键作用.

研究的目的:

为了评估二氧化碳在城市化湖中的部分压力 (pCO2) 和流量 (fCO2) 的波动.
为了评估二氧化碳交换的每日和季节性变异性,在一个优质的城市湖.
确定二氧化碳吸收/排放的驱动因素及其与城市化的关系.

主要方法:

每两周一次在现场监测pCO2,fCO2和相关参数 (叶绿素a,酸盐,溶氧,总).
2020年1月至9月在中国西南部一个城市化的湖泊收集数据.
分析二氧化碳参数的日间和季节性趋势.

主要成果:

二氧化碳的部分压力 (pCO2) 和流量 (fCO2) 从上午到下午呈现下降趋势.
湖在春季 (一月至四月) 充当碳汇 (C-sink),夏季 (五月至八月) 充当碳源 (C-source).
在pCO2/fCO2和叶绿素-a/酸盐之间发现了正相关性;与溶解氧和总之间发现了负相关性.

结论:

城市化的湖泊表现出明显的每日和季节性二氧化碳源-沉变化.
光合作用和呼吸是二氧化碳交换的主要驱动因素.
与城市化相关的营养变化 (酸盐,) 影响二氧化碳动态.

关键词:

碳化合物 (CO) 的二氧化碳 (CO2) 流量二氧化碳 (CO2) 的来源沉.移动模式的移动模式城市化的湖泊城市化.pCO ((2)) 的情况.

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