All Sonic Anemometers Need to Correct for Transducer and Structural Shadowing in Their Velocity Measurements
All Sonic Anemometers Need to Correct for Transducer and Structural Shadowing in Their Velocity Measurements
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DOI：
10.1175/jtech-d-15-0171.1
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发表时间：
2016-01
影响因子：
2.2
通讯作者：
J. Frank;W. Massman;E. Swiatek;H. Zimmerman;B. Ewers
中科院分区：
文献类型：
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作者：
J. Frank;W. Massman;E. Swiatek;H. Zimmerman;B. Ewers
摘要/ abstract摘要：声速风速法是所有地表能量和生态系统碳水平衡的涡旋协方差研究的基础。最近的研究表明，一些非正交风速计低估了垂直风。这里假设这是由于缺乏换能器和结构阴影校正。通过在正交（应用技术公司的K-probe）和非正交（应用技术公司的a -probe，以及坎贝尔科学公司的CSAT3和CSAT3V）风速计设计之间的重复比较实验来验证这一点。在12周的每一周里，随机选择5个风速计安装在垂直和水平方向。采用贝叶斯分析方法对风速仪测量的风标准差（σu、συ和σw）与温度、湍流动能（TKE）、垂直/水平TKE之比（VHTKE）和感热通量(H)的差异进行了检验。用传感器的各种应用对数据集进行了分析。
AbstractSonic anemometry is fundamental to all eddy-covariance studies of surface energy and ecosystem carbon and water balance. Recent studies have shown that some nonorthogonal anemometers underestimate vertical wind. Here it is hypothesized that this is due to a lack of transducer and structural shadowing correction. This is tested with a replicated intercomparison experiment between orthogonal (K-probe, Applied Technologies, Inc.) and nonorthogonal (A-probe, Applied Technologies, Inc.; and CSAT3 and CSAT3V, Campbell Scientific, Inc.) anemometer designs. For each of the 12 weeks, five randomly selected and located anemometers were mounted both vertically and horizontally. Bayesian analysis was used to test differences between half-hourly anemometer measurements of the standard deviation of wind (σu, συ, and σw) and temperature, turbulent kinetic energy (TKE), the ratio between vertical/horizontal TKE (VHTKE), and sensible heat flux (H). Datasets were analyzed with various applications of transducer sha...