Observation of deep near-inertial waves using PDS-CPIES in the western Arctic Ocean
|Temporal extent||2017-08-15 -2019-09-15|
|Author(s)||Jeon Chanhyung1, Boury Samuel2, Cho Kyoung-Ho3, Park Jae-Hun4, Peacock Thomas1|
|Affiliation(s)||1 : Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
2 : Univ Lyon, ENS de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique, F-69342 Lyon, France
3 : Division of Polar Ocean Sciences, Korea Polar Research Institute, Incheon, 21990, Korea
4 : Department of Ocean Sciences, Inha University, Incheon, 22212, Korea
|Keyword(s)||Deep near-inertial waves, western Arctic Ocean, PDS-CPIES, stratification|
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.
|Acknowledgements||An array of six PDS-CPIES deployments and CTD hydrocasts were conducted by RV Araon and RV Sikuliaq.|
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).