IReal - Time Acoustic Monitoring of Ocean Interiors using Ocean Acoustic Tomography

摘要

The ocean acoustic tomography is a unique and powerfulrnoceanographic tool that can give us a time-series of 3D snapshots ofrnocean interilors in nearly real time. JAMSTEC has realized such anrnideal ocean acoustic tomography system combined with the GlobalrnTelecommunication Network @MARSAT-C). A demonstrationrnexperiment was carried out in the western Pacific Basin in the summerrnof 1997. During this experiment, the time-series of 3D tomographicrnmaps of temperature was successfully reconstructed every six hours.rnThese maps showed the energetic meander of the Kuroshio Extensionrnwith high time resolution. Another tomographic observationrnexperiment was conducted in the central equatorial Pacific Ocean fromrn1999 to 2000. The preliminary result showed the temperature andrncurrent fields changed strongly related to ENS0 (La Nina). In thernlatter experiment, the processing time of measured data was greatlyrnreduced and a tomographic snapshot was reconstructed in nearlyrnreal-time. Our aim to monitor the ocean inferiors in real-time is almostrnaccomplished.