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

Main Article Content

Bernardo Figueroa-Espinoza
http://orcid.org/0000-0002-6353-8970
Zulia Sánchez-Mejía
http://orcid.org/0000-0001-8444-3885
Jorge Maximiliano Uuh-Sonda
Paulo Salles
Luis Méndez-Barroso
http://orcid.org/0000-0001-7467-5498
Hugo Alberto Gutiérrez-Jurado
http://orcid.org/0000-0001-8313-9486

Abstract

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<RMSE<0.097) and high correlation coefficients (0.77< r2<0.95).

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Author Biographies

Bernardo Figueroa-Espinoza, Universidad Nacional Autónoma de México, Instituto de Ingeniería Unidad Académica Sisal del Instituto de Ingeniería de la UNAM. Puerto de Abrigo S/N, Sisal, Yucatán 97355

Laboratorio de Ingeniería y Procesos Costeros (LIPC)

Researcher

Zulia Sánchez-Mejía, Instituto Tecnológico de Sonora (ITSON) 5 de febrero 818 sur, Colonia Centro. C.P. 85000. Ciudad Obregón, Sonora. México. ​​​​​​​​​​​​​

Departamento: Ciencias del Agua y Medioambiente

Researcher

Jorge Maximiliano Uuh-Sonda, Universidad Nacional Autónoma de México Unidad Académica Sisal del Instituto de Ingeniería de la UNAM. Puerto de Abrigo S/N, Sisal, Yucatán 97355

Laboratorio de Ingeniería y Procesos Costeros
PhD

Paulo Salles, Universidad Nacional Autónoma de México, Instituto de Ingeniería Unidad Académica Sisal del Instituto de Ingeniería de la UNAM. Puerto de Abrigo S/N, Sisal, Yucatán 97355

Laboratorio de Ingeniería y Procesos Costeros (LIPC)

Researcher

Luis Méndez-Barroso, Instituto Tecnológico de Sonora (ITSON) 5 de febrero 818 sur, Colonia Centro. C.P. 85000. Ciudad Obregón, Sonora. México. ​​​​​​​​​​​​​

Professor of Geological sciences

Hugo Alberto Gutiérrez-Jurado, The University of Texas at El Paso 500 West University Avenue El Paso, TX 79968

Dept. Geological Sciences

Assistant Professor

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