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A new drifting device to measure internal waves in the upper ocean by Luca Centurioni and Peter Niiler Scripps Institution of Oceanography,

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Presentation on theme: "A new drifting device to measure internal waves in the upper ocean by Luca Centurioni and Peter Niiler Scripps Institution of Oceanography,"— Presentation transcript:

1 A new drifting device to measure internal waves in the upper ocean by Luca Centurioni and Peter Niiler Scripps Institution of Oceanography, La Jolla, CA,USA DBCP Scientific and Technical Workshop, 10/17/2005 In collaboration with Vitalii Sheremet (GSO-URI), Ruo-Shan Tseng (National Sun Yat-sen University) and Jian-Hwa Hu (National Taiwan Ocean University)

2 Outline Instruments; Experiment design; Summary of observations; Non-linearity; Summary (and future plans).

3 INSTRUMENTS FOR NLIW EXPERIMENT: 4 drifters with thermistor and pressure chain (20 sensors), ADCPs, GPS and ARGOS

4

5 Summary of observations First deployment, leg1,05/02/2005 Second deployment, leg 2, 05/07/2005 xx xx South China Sea Luzon Taiwan

6 Summary of observations: trajectories of SVP drifters and absolute sea level

7 Summary of observations: trajectories of SVP drifters (blue) and T-chains (red).

8 Summary of observations T chain record, legs 1 & 2

9 Summary of observations: wave packet and lift of chain 38 kHz Echo Sounder att. and T contour (T-Chain)

10 u v w Nonlinearity. Acoustic current meters profiles: buoy 56415, leg2

11 u v w

12 Summary Maps of absolute sea-level are helpful in planning the experiment; Acceleration: vertical advection terms in horizontal momentum equations are of same order of the linear terms; Future plans. Next experiment should try to address the following issues: a) modification of waves along their path; b) measure of horizontal advective terms (closely spaced array);


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