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Observation of deep near-inertial waves using PDS-CPIES in the western Arctic Ocean
Notable spatial and temporal variability of near-inertial waves in the western Arctic Ocean is observed from direct deep current measurements. The deep current is about 50 m above the bottom. The current-meter measures a speed range of 0 to 300 cm/s with direction using an Aanderaa Data Instruments Doppler current sensor. All current data is acquired through pop-up data shuttle (PDS); AES2, AES5, AES6 : 1 year, AES3: 2 year, AES1 and AES4: no available data). After removing the four major semidiurnal tides from the current measurements, a third-order Butterworth phase-preserving band-pass filter with cutoff frequency at 0.9–1.1f is applied to extract NIW signals. Bouyancy frequency (N) is calculated from the CTD data casted from RV Araon and RV Sikuliaq.
Cryosphere, Physical oceanography
Deep near-inertial waves, western Arctic Ocean, PDS-CPIES, stratification
78N, 72S, -152E, -170W
Current and Pressure Recording Inverted Echo sounder (CPIES) attached with Pop-up data Shuttle (PDS), called PDS-CPIES. The current-meter sensor measures a speed range of 0 to 300 cm/s with direction using an Aanderaa Data Instruments Doppler current sensor. Stratification is obtained from CTD (Conductivity-Temperature-Depth).