Articles | Volume 12, issue 1
Research article
15 Jan 2019
Research article |  | 15 Jan 2019

A method to assess the accuracy of sonic anemometer measurements

Alfredo Peña, Ebba Dellwik, and Jakob Mann

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Cited articles

Abari, C. F., Pedersen, A. T., Dellwik, E., and Mann, J.: Performance evaluation of an all-fiber image-reject homodyne coherent Doppler wind lidar, Atmos. Meas. Tech., 8, 4145–4153,, 2015. a
Dimitrov, N., Natarajan, A., and Kelly, M.: Model of wind shear conditional on turbulence and its impact on wind turbine loads, Wind Energ., 18, 1917–1931, 2015. a
Dyer, A. J.: Flow distorsion by supporting structures, Boundary-Layer Meteorol., 20, 243–251, 1981. a
Foken, T.: The Energy Balance Closure Problem: an Overview, Ecol. Appl., 18, 1351–1367, 2008. a, b
Frank, J. M., Massman, W. J., and Ewers, B. E.: Underestimates of sensible heat flux due to vertical velocity measurement errors in non-orthogonal sonic anemometers, Agr. Forest Meteorol., 171–172, 72–81, 2013. a, b
Short summary
We propose a method to assess the accuracy of turbulence measurements by sonic anemometers. The idea is to compute the ratio of the vertical to along-wind velocity spectrum within the inertial subrange. We found that the Metek USA-1 and the Campbell CSAT3 sonic anemometers do not show the expected theoretical ratio. A wind-tunnel-based correction recovers the expected ratio for the USA-1. A correction for the CSAT3 does not, illustrating that this sonic anemometer suffers from flow distortion.