在一个亚热带淡水水库中探索甲沸的时间动态
Lediane Marcon1,2, Tobias Bleninger3, Michael Männich3
1Post-graduate Program on Water Resources and Environmental Engineering (PPGERHA), Federal University of Paraná, Curitiba, Brazil.
PloS one
|March 27, 2024
概括
水生生态系统通过泡沸产生的甲排放是高度可变的. 这项研究表明,虽然经验模型在每小时的流量上扎,但它们可以准确地预测淡水水库中每天和每周的甲沸动态.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 临界技术 临界技术
背景情况:
- 来自水中沉积物的甲沸是大气中甲释放的重要,但可变的途径.
- 了解沸的时间动态和环境驱动因素对于准确的温室气体排放估计至关重要.
- 现有的实证模型在捕捉甲沸流的全部变化方面取得了有限的成功.
研究的目的:
- 分析控制甲沸时间动态的因素.
- 评估实证模型的应用和性能,以在各种时间尺度和水生系统中复制沸动态.
- 评估实证模型的潜力,以改善内陆水域甲排放估计.
主要方法:
- 在三年内,在一个亚热带淡水库中,对沸流和环境变量进行连续的高频度测量.
- 时间序列分析,以调查沸与环境因素之间的相关性,包括热分层.
- 在不同的时间尺度上 (每小时,每天,每周) 评估和比较经验模型性能 (包括通用添加模型).
主要成果:
- 沸事件同步和与环境变量的相关性随着时间的推移而波动,并受到热分层的影响.
- 来自其他系统的实证模型解释了有限的沸变异性 (R2 < 0.3),除非包括其他变量.
- 一个通用的增材模型准确地预测了每天 (70%) 和每周 (96%) 的沸变化,但在每小时的尺度上表现不佳 (R2 = 0.19).
结论:
- 经验模型显示出填补隙和捕捉甲沸的主要时间趋势的希望,特别是在更粗的时间尺度上.
- 模型性能在很大程度上取决于所选择的时间表和包含相关的环境变量.
- 更好地了解和建模沸动态对于有效的内陆水域甲减排战略至关重要.
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