用二维声速计估算沿海地区的摩擦速度

IF 1 4区地球科学 Q4 METEOROLOGY & ATMOSPHERIC SCIENCES

Atmosfera Pub Date : 2021-04-19 DOI:10.20937/ATM.52960

B. Figueroa‐Espinoza, Z. Sanchez‐Mejia, J. Uuh-Sonda, P. Salles, L. Méndez-Barroso, H. Gutiérrez‐Jurado

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引用次数: 2

摘要

摩擦速度（u*）是工程和地球物理流研究中使用的一个重要速度尺度。二维声波风速计在现代气象站的广泛使用使得仅从速度的水平分量估计u*成为一种非常有吸引力的可能性。不同风况的存在（如沿海地区或附近的海风）导致湍流参数取决于风向。此外，u*取决于大气稳定性。这使得从2D测量中估计u*变得非常困难。提出了一个简单的表达式，然后用位于沿海地区的六个独立实验的数据进行了测试。结果表明，使用湍流强度作为u*的代理，可以从2D测量中估计摩擦速度，大大降低了对风向或大气稳定性的敏感性，具有较小的均方根误差（0.06

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Friction Velocity estimation using a 2D Sonic Anemometer in Coastal Zones

Friction velocity (u*) is an important velocity scale used in the study of engineering and geophysical flows. The widespread use of 2D sonic anemometers in modern meteorological stations makes the estimation of u* from just the horizontal components of the velocity a very attractive possibility. The presence of different wind regimes (such as sea breezes in or near coastal zones) cause the turbulent parameters to be dependent on the wind direction. Additionally, u* depends on atmospheric stability. This makes the estimation of u* from 2D measurements very difficult. A simple expression is proposed, and then tested with data from six independent experiments located in coastal zones. The results show that it is possible to estimate friction velocity from 2D measurements using the turbulence Intensity as a proxy for u*, reducing substantially the sensitivity to the wind direction or atmospheric stability, with small root mean squared errors (0.06

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来源期刊

Atmosfera 地学-气象与大气科学

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： ATMÓSFERA seeks contributions on theoretical, basic, empirical and applied research in all the areas of atmospheric sciences, with emphasis on meteorology, climatology, aeronomy, physics, chemistry, and aerobiology. Interdisciplinary contributions are also accepted; especially those related with oceanography, hydrology, climate variability and change, ecology, forestry, glaciology, agriculture, environmental pollution, and other topics related to economy and society as they are affected by atmospheric hazards.