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![Page 1: A new drifting device to measure internal waves in the upper ocean by Luca Centurioni and Peter Niiler lcenturioni@ucsd.edu Scripps Institution of Oceanography,](https://reader035.fdocuments.net/reader035/viewer/2022070307/551b4f34550346d41a8b5ed3/html5/thumbnails/1.jpg)
A new drifting device to measure internal waves in the upper ocean
byLuca 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)
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Outline
• Instruments;
• Experiment design;
• Summary of observations;
• Non-linearity;
• Summary (and future plans).
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INSTRUMENTS FOR NLIW EXPERIMENT: 4 drifters with
thermistor and pressure chain (20 sensors) , ADCPs, GPS and
ARGOS
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Summary of observations
First deployment, leg1,05/02/2005
Second deployment, leg 2, 05/07/2005
xxxx
South
China
Sea
Luzon
Taiwan
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Summary of observations: trajectories of SVP drifters and absolute sea level
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Summary of observations: trajectories of SVP drifters (blue) and T-chains (red).
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Summary of observations
T chain record, legs 1 & 2
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Summary of observations: wave packet and lift of chain
38 kHz Echo Sounder att. and T contour (T-Chain)
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Nonlinearity. Acoustic current meters profiles: buoy 56415, leg2
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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);