Microelectrode Velocity Effects and Aquatic Eddy Covariance Measurements under Waves
Microelectrode Velocity Effects and Aquatic Eddy Covariance Measurements under Waves
复制标题
波浪下的微电极速度效应和水生涡流协方差测量
DOI：
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
P. Berg
中科院分区：
文献类型：
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作者：
C. Reimers;H. Özkan‐Haller;A. Albright;P. Berg
摘要
在波致流条件下验证涡动相关（EC）技术的兴趣促使在一个104米长的大型波浪水槽（LWF）中进行了一系列实验，使用了声学多普勒流速仪（ADV）以及安装在坚固三脚架上的两个氧微电极（尖端相距约2毫米）。在沙床上进行不规则波实验期间，放置在水槽内的另外四个ADV提供了近床层的对比速度测量。这些测量结果表明，三脚架框架对局部湍流的影响微不足道。然而，在微电极尖端伸入ADV测量体积的设置中，有时会观察到速度测量误差。不同的氧微电极速度效应（搅拌敏感性）以及响应时间偏移也被确定为问题，给EC通量推导增加了偏差。通过旨在模拟LWF数据的建模以及对12小时……的检查，进一步研究了微电极速度效应。
AbstractInterest in validating the eddy covariance (EC) technique under wave-induced flows led to a series of experiments in a 104-m-long large wave flume (LWF) using an acoustic Doppler velocimeter (ADV) and two oxygen microelectrodes (tips ~2 mm apart) mounted on a sturdy tripod. Four additional ADVs positioned within the flume provided comparative near-bed velocity measurements during experiments with irregular waves over a sand bed. These measurements revealed that modifications of local turbulence by the tripod frame were insignificant. However, errors in velocity measurements were at times observed for setups where the microelectrode tips protruded into the ADV’s measurement volume. Disparate oxygen microelectrode velocity effects (stirring sensitivities) combined with response time offsets were also identified as problems, adding biases to EC flux derivations. Microelectrode velocity effects were further investigated through modeling designed to mimic the LWF data, and through examination of a 12-h...
氧光极在分析平台上的时间响应及其对流速和温度的依赖性
DOI：
10.4319/lom.2014.12.617
发表时间：
2014
期刊：
Limnology and Oceanography: Methods
影响因子：
--
作者：
Bittig;B. Fiedler;R. Scholz;G. Krahmann;A. Körtzinger
通讯作者：
A. Körtzinger
影响因子：
2.7
作者：
Berg, Peter;Glud, Ronnie N.;Kitazato, Hiroshi
通讯作者：
Kitazato, Hiroshi