Download
1 / 12
120 likes | 270 Views
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, La Jolla, CA,USA DBCP Scientific and Technical Workshop, 10/17/2005.
E N D
A new drifting device to measure internal waves in the upper oceanbyLuca Centurioni and Peter Niilerlcenturioni@ucsd.eduScripps Institution of Oceanography, La Jolla, CA,USADBCP 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)
Outline • Instruments; • Experiment design; • Summary of observations; • Non-linearity; • Summary (and future plans).
INSTRUMENTS FOR NLIW EXPERIMENT: 4 drifters with thermistor and pressure chain (20 sensors) , ADCPs, GPS and ARGOS
Summary of observations First deployment, leg1,05/02/2005 Second deployment, leg 2, 05/07/2005 Taiwan South China Sea x x x x Luzon
Summary of observations: trajectories of SVP drifters and absolute sea level
Summary of observations: trajectories of SVP drifters (blue) and T-chains (red).
Summary of observations T chain record, legs 1 & 2
Summary of observations: wave packet and lift of chain 38 kHz Echo Sounder att. and T contour (T-Chain)
Nonlinearity. Acoustic current meters profiles: buoy 56415, leg2 u v w
Nonlinearity. Acoustic current meters profiles: buoy 56415, leg2 u v w
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);
