Inertial Motion Detected by Satellite-Tracked Surface Drifter
From late October to middle November in 1981, trajectory of the ARGOS surface drifter which flowed in the sea area 41-39。Neast off Japan depicted continiously anticyclonic trochoidal loops. Twentyone loops, which were mostly circular, were found in the period from 25 October to 11 November with the average period of 18.8 hours.This clearly shows the existance of inertial motions in the studied area. The mean flow was calculated to be 10-25cm/sec southwestward from 18-19 hours running averaged locations from interpolated locations of the drifter at every one hour. Using above results, the speed of inertial motion was estimated as 45-80 cm/sec. Time change of speed and radius of inertial circular flow tend to decrease as a whole, respectively, with several intermittent increases. It is suggested that these intermittent reinforcement are generated by strong wind blow on the sea surface at every 3-5 days.
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| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
1998
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| Online Access: | http://hdl.handle.net/1834/15755 |
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