Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL094272 |
Heterogeneity matters: aggregation bias of gas transfer velocity vs. energy dissipation rate relations in streams | |
Gianluca Botter; Paolo Peruzzo; Nicola Durighetto | |
2021-08-18 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | The gas transfer velocity, , modulates gas fluxes across air-water interfaces in rivers. While the theory postulates a local scaling law between and the turbulent kinetic energy dissipation rate , empirical studies usually interpret this relation at the reach-scale. Here, we investigate how local laws can be integrated along heterogeneous reaches exploiting a simple hydrodynamic model, which links stage and velocity to the local slope. The model is used to quantify the relative difference between the gas transfer velocity of an heterogeneous stream and that of an equivalent homogeneous system. We show that this aggregation bias depends on the exponent of the local scaling law, , and internal slope variations. In high energy streams, where , spatial heterogeneity of significantly enhances reach-scale values of as compared to homogeneous settings. We conclude that small-scale hydro-morphological traits bear a profound impact on gas evasion from inland waters. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/335960 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Gianluca Botter,Paolo Peruzzo,Nicola Durighetto. Heterogeneity matters: aggregation bias of gas transfer velocity vs. energy dissipation rate relations in streams[J]. Geophysical Research Letters,2021. |
APA | Gianluca Botter,Paolo Peruzzo,&Nicola Durighetto.(2021).Heterogeneity matters: aggregation bias of gas transfer velocity vs. energy dissipation rate relations in streams.Geophysical Research Letters. |
MLA | Gianluca Botter,et al."Heterogeneity matters: aggregation bias of gas transfer velocity vs. energy dissipation rate relations in streams".Geophysical Research Letters (2021). |
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