Abstract
Profiling current meter (PCM) measurements under adrifting buoy are compared with concurrent shipboard acoustic Doppler current profiler (ADCP) measurements camed out in the western equatorial Pacific in March 1991, from 10s to 7ON along the 165E meridian. The mean (ADCP minus PCM) zk rms differences between zonal and meridional velocity components are 5.7 t 11.2 cm s-' and 0.0 t 8.8 cm s-'. respectively, when PCM measurements are relative to 600 m. The mean f rms differences decrease to 2.3 t 7.8 cm s-' and 0.0 k 6.3 cm s-' when the PCM and ADCP data are both referenced to the same layer (on a mean, 16-240 m). As compared with ADCP, it is found that PCM underestimates velocities of less than 20 cm s-' by about 25%.
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