Dataset: Spectral analyses of high-frequency data during two hour-long periods from the ECHOES system deployed at three sites in the Florida Keys in June 2018

An eddy covariance system, known as ECHOES, was deployed at three sites offshore of Key Largo, Florida during June 2018. The ECHOES systems logged the three-dimensional velocity, depth, O2 optode, pH sensor, and triaxial Inertial Measurement Unit. A separate frame at each site contained a photosynthetically active radiation (PAR) sensor and a Seabird SeapHOx, measuring salinity, temperature, depth, O₂, and pH. This dataset contains the spectral analyses (power spectra and cross power spectral density (CPSD)) of high-frequency data (turbulence; momentum, oxygen and hydrogen ion fluxes) from two hour-long periods during a high-energy wave period (Hr 38) and a low-energy wave period (Hr 116).