Gas transfer velocity (k600$$ {k}_{600} $$) increases with discharge in steep streams but not in low‐slope streams

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Kelly S. Aho, Kaelin M. Cawley, Robert O. Hall, Robert T. Hensley, Walter K. Dodds, Nicolas Harrison, Keli J. Goodman
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引用次数: 0

Abstract

Gas transfer velocity () controls gas fluxes between aquatic ecosystems and the atmosphere. In streams, is controlled by turbulence and, thus, local hydrology and geomorphology. Resultantly, variability in can be large and modeling from physical parameters can have large uncertainty. Here, we leverage a large dataset of estimates derived from tracer‐gas experiments in 22 US streams across a range of discharges. Our analysis shows that was highly variable both spatially across and temporally within streams, with estimates of spanning three orders of magnitude. Overall, scaled with discharge in steep streams due to relatively high stream power, but not in low‐slope streams, where stream power was relatively low even at high flows. Understanding how responds to stream discharge in a wide variety of streams is key to creating temporally and spatially resolved estimates of biogeochemical processes in streams.
气体传递速度()控制水生生态系统和大气之间的气体通量。在溪流中,受湍流控制,因此受当地水文和地貌控制。因此,在的可变性可能很大,从物理参数建模可能有很大的不确定性。在这里,我们利用了一个大型数据集,该数据集来自美国22条河流中一系列排放的示踪气体实验。我们的分析表明,这在空间上和时间上都是高度可变的,估计跨越三个数量级。总体而言,在陡峭的河流中,由于水流功率相对较高,与流量成比例,但在低坡度的河流中,即使在高流量下,水流功率也相对较低。了解在各种各样的河流中如何响应河流排放是创建河流中生物地球化学过程的时间和空间分辨估计的关键。
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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