The main objective of ACOBAR is to develop a system for environmental monitoring of the interior of the Arctic Ocean by assimilation of data obtained with acoustical methods including tomography, data transmission from underwater platforms, communication and navigation of floats and gliders under the ice-cover.
The Fram Strait Ocean Observatory
While tomography is superior to the glider technology in temporal resolution, the glider provide ocean data at a much higher spatial resolution. A region with strong mesoscale activity as in the Fram Strait requires both high temporal and spatial resolution of the observations. Therefore, we have proposed to establish an integrated data and model system combining acoustic tomography, gliders, point measurements and ice-ocean modelling with data assimilation techniques to improve the accuracy of the heat, mass and freshwater transport estimates through the Fram Strait.
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Acoustic tomography
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Acoustic remote sensing techniques can provide unique, synoptic and integrated measures of internal ocean temperature at an accuracy of 0.01°C along the acoustic tracks. (Read more...) |
Glider Center
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An European glider operation center is under development under the ACOBAR project (Read more...) |
Glider
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Gliders provide a possibility to obtain a wide range of ocean data with a high spatial resolution. Using a buoyancy engine, they have long endurance time and can measure over large distances. When on the surface, they communicate and send data in the near-real time using satellite telemetry. Going under ice, gliders have to relay on acoustic navigation. (Read more...) |
AITP
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Advanced Acoustic Ice Tethered Platforms (AITP) are under development (Read more...) |
Acoustic modems
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Acoustic modems provide capability to do two-way communication between moorings and gliders without use of cables and to obtain data from moored instruments without mooring recovery. (Read more...) |
Experiments
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Technological development and achievements relies on testing of instruments in field experiments. (Read more...) |
Environmental
assessment
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Environmental assessment of the Acoustic Experiment in the Fram Strait has been carried out by independent experts. Photo by Kjøllmoen, KV Svalbard, 2009
(Read more...)
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