适度的水文干旱最大化了CO2沉没在中国最大的洪水平原湖
Lejun Zhao1,2, Xiaosong Zhao1,3, Xingwang Fan1
1Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, China.
Environmental science & technology
|August 13, 2025
概括
洪水平原和湖泊的碳动态对于全球碳预算至关重要. 水文变化,特别是水位上升和衰退时间,显著影响二氧化碳 (CO2) 吸收,影响碳中和目标.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 气候科学 气候科学
背景情况:
- 洪水平原湖泊在全球碳循环中发挥着至关重要的作用.
- 了解这些生态系统中的碳动态对于准确的全球碳预算评估至关重要.
研究的目的:
- 构建一个空间显式的二氧化碳 (CO2) 流动数据集,用于中国最大的洪水平原湖,从2003年到2022年.
- 研究湖泊生态系统中二氧化碳流量的时间变化的主要驱动因素.
主要方法:
- 开发一个空间显式的二氧化碳流量数据集.
- 统计分析以确定二氧化碳流量的关键环境驱动因素.
- 量化水文制度变化对二氧化碳吸收的影响.
主要成果:
- 年度二氧化碳流量在2003年至2022年间,从吸收到释放,差异很大.
- 水文因素,特别是水位上升和衰退开始,是二氧化碳流量的最有影响力的驱动因素.
- 水位上升的延迟增加了二氧化碳的吸收,而早期的经济衰退也增加了吸收,但极端干旱显著减少了二氧化碳的吸收.
结论:
- 水利制度和湿地植被是洪水平原和湖泊二氧化碳流量的关键决定因素.
- 水资源管理策略直接影响洪水平原湖泊的碳捕集能力.
- 研究结果为评估生态影响和通过有效的湖泊管理推进碳中和目标提供了关键的见解.
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