Measuring CH4 Fluxes From Lake and Reservoir Sediments: Methodologies and Needs
Measuring CH4 Fluxes From Lake and Reservoir Sediments: Methodologies and Needs
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DOI：
10.3389/fenvs.2022.850070
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
Sofia L. D'Ambrosio;J. Harrison
中科院分区：
文献类型：
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作者：
Sofia L. D'Ambrosio;J. Harrison
在构建湖泊和水库的CH4预算时，准确量化沉积物和上覆水体之间的CH4扩散通量至关重要。虽然各种非原位和原位技术存在确定这一通量，没有评论提供了一个全面的，比较概述这些方法或讨论的影响，测量方法对通量估计。在这里，我们批判性地回顾了163项同行评审研究中应用的方法，以估计湖泊沉积物中CH 4扩散通量，包括沉积物孵化、底栖室以及沉积物或水体中应用的建模方法。对于每种方法，我们总结了方法，讨论了局限性和优点，并总结了不同方法之间的比较。此外，我们研究了方法的局限性如何可能形成目前理解湖泊CH4动态的知识缺口。最后，我们呼吁开发和应用新的方法，沿着额外的测试和现有方法的相互比较，以促进对湖泊甲烷通量的理解。
Accurately quantifying the diffusive flux of CH4 between sediments and the overlying water column is crucial when constructing CH4 budgets in lakes and reservoirs. Although a variety of ex situ and in situ techniques exist for determining this flux, no reviews have provided a comprehensive, comparative overview of these approaches or discussed implications of measurement method on flux estimation. Here, we critically review methods applied in 163 peer-reviewed studies to estimate diffusive CH4 fluxes from lake sediments, including sediment incubations, benthic chambers, and modeling approaches applied in the sediment or water column. For each method, we summarize the approach, discuss limitations and advantages, and summarize published comparisons between different methods. In addition, we examine how method limitations have likely shaped knowledge gaps in current understanding of lake CH4 dynamics. Finally, we call for the development and application of new methods, along with additional testing and intercomparison of existing methods, in order to advance understanding of lake CH4 fluxes.