The speed of sound in moist air is discussed and a more accurate value for the coefficient of the linear dependence of sonic temperature on specific humidity is proposed. An analysis of speed-of-sound data measured by three sonic anemometers in a climate chamber and in the field shows that the temperature response of each instrument significantly influences not only the determination of sonic temperature, but also its fluctuations. The corresponding relative contribution to the error in the evaluation of the temperature fluctuations and the turbulent heat fluxes can be as high as 40%. The calibration procedure is discussed and a method of correction is proposed.
Influence of the Sonic Anemometer Calibration on Turbulent Heat-Flux Measurements / Richiardone, R.; Manfrin, M.; Ferrarese, S.; Francone, C.; Fernicola, Vito; Gavioso, Roberto; Mortarini, L.. - In: BOUNDARY-LAYER METEOROLOGY. - ISSN 0006-8314. - 142:(2012), pp. 425-442. [10.1007/s10546-011-9688-z]
Influence of the Sonic Anemometer Calibration on Turbulent Heat-Flux Measurements
FERNICOLA, VITO;GAVIOSO, ROBERTO;
2012
Abstract
The speed of sound in moist air is discussed and a more accurate value for the coefficient of the linear dependence of sonic temperature on specific humidity is proposed. An analysis of speed-of-sound data measured by three sonic anemometers in a climate chamber and in the field shows that the temperature response of each instrument significantly influences not only the determination of sonic temperature, but also its fluctuations. The corresponding relative contribution to the error in the evaluation of the temperature fluctuations and the turbulent heat fluxes can be as high as 40%. The calibration procedure is discussed and a method of correction is proposed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
