Gliders A new monitoring component added to the POSEIDON marine observatory

The new glider component of the Poseidon monitoring System, May 2017

Ocean gliders are autonomous underwater vehicles used for ocean science. They travel in the sea water by changing their buoyancy and attitude in order to successively dive up and down in order to sample the sea water and collect oceanographic data. Gliders typically profile in a saw tooth pattern from the surface to 500-1000 m depth, travelling 3-6 km in the horizontal at a speed of about 1 km/h in every dive cycle. They are operating extensively for sustained observations both in coastal and open seas collecting information of physical parameters like temperature, salinity, dissolved oxygen, chlorophyll, etc. along predefined transects.

Poseidon System has integrated a new glider component by adding two SeaExplorer gliders in its observing network for the Greek Seas. The new infrastructure has been established at Poseidon facilities and it is expected to be used for sustained operations in the next few months.

POSEIDON glider dives in the Cretan Sea for its first scientific operation, November 2017

A SeaExplorer Poseidon glider was deployed for its first scientific expedition in the Cretan Sea! Oceanographic data of temperature, salinity and dissolved oxygen are collected in order to study seasonal variability of the flow field, collecting also evidences for the intermediate or deep water formation events that are known to occur in the area. The SeaExplorer glider will continuously sample the water column up to 700 m depth for approximately 40 days.

The predefined path of the first mission of the POSEIDON glider in the Cretan Sea

The POSEIDON glider starts its descent in the Cretan Sea

Expanding depth limits up to 1000 m in the Cretan Sea glider operations, November 2018

The endurance line which has been established in the Cretan Sea, monitoring seasonal variations of physical and biochemical parameters of the water up to 700 m, is currently strengthen with a deeper glider able to dive and collect data in 1000 m depth. In addition to the physical parameters of water temperature and salinity the glider is also collecting oxygen, chlorophyll, organic matter and back scattering data.


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