Mooring Motion Correction of SYNOP Central Array Current Meter Data
Summary rept. May 1988-Aug 1990,
RHODE ISLAND UNIV NARRAGANSETT GRADUATE SCHOOL OF OCEANOGRAPHY
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From May of 1988 to August 1990 as part of the SYNOP field program, twelve tall moorings measured the Gulf Streams temperature and velocity fields at nominal depths of 400 m. 700 m. 1000 m. and 3500 m. Although stiff, high- performance moorings were used to maintain the top current meters at approximately 400 in below the surface approx. 4000 m above the sea floor, the jets drag caused the moorings to make vertical excursions. Therefore, the current meter data were corrected to constant horizons using a modified version of Hoggs 1991 mooring motion correction scheme. An important extension of Hoggs 1991 method is the inclusion of a weighted interpolation of the measured temperatures. This modification assures that as the current meter measurements approach the respective nominal depths. the corrected temperature and velocity outputs smoothly approach the measurements i.e. the compensated u, v, T records are truer to the measured records. This report documents the mooring motion correction of the SYNOP Central Array temperature and velocity data.
- Physical and Dynamic Oceanography
- Marine Engineering