The ASEAN-Australia Regional Ocean Dynamics Expeditions 1993-1995

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Abstract
The Regional Ocean Dynamics Expeditions involved scientists from five of the ASEAN nations and Australia. The aims of the expeditions were to share skills across the region; to further understand the exchange of water between the Pacific and Indian Oceans as it relates to climate variability; and to gather information from shallow straits. The expeditions employed ships from four ASEAN nations to collect data from Malacca Strait, the South China Sea, Sulu Sea, Sulawesi Sea, Makassar Strait, Maluku Sea, Halmahera Sea and the Mindanao Current. The data included profiles of temperature, salinity and oxygen from a CTD/rosette, temperature profiles with expendable bathythermographs, and net hauls for zooplankton and phytoplankton. Five deep water moorings were deployed for over one year: three in Makassar Strait; one in the Maluku Sea; and one in the Halmahera Sea. Two bottom-mounted ADCPs were deployed for five several-month periods in the heavilytrafficked Straits of Malacca and Singapore in depths of 60-70 metres. The bottom-mounted assemblies were specially developed for the project and each consisted of an instrument package mounted inside an expendable threetonne concrete anchor taking the form of a truncated pyramid. This was lowered to the seafloor by the deployment vessel. The package included a release that was triggered by an acoustic command by the recovery vessel. The participating ASEAN scientists spent several months in Australia in early 1995 analysing data and writing reports which were presented at a summary symposium in Lombok, Indonesia, in June 1995. The ASEAN Australia Economic Co-operation Program was funded by AusAID and managed by AMSAT Ltd.

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