This tender applies to coastal gliders for subsurface observations of essential ocean variables (physical oceanography and biogeochemical measurements). Under the strategic initiative Coast-Risk / Coastwatch – the Norwegian Coastal Observing System of Systems two ocean gliders equipped with sensors for physical, biological and biogeochemical measurements will be acquired. The tender is a single purchase.Hovedtrekkene i prosedyrenThis tender applies to coastal gliders for subsurface observations of essential ocean variables (physical oceanography and biogeochemical measurements). Under the strategic initiative Coast-Risk / Coastwatch – the Norwegian Coastal Observing System of Systems two ocean gliders equipped with sensors for physical, biological and biogeochemical measurements will be acquired. The tender is a single purchase.a.
Operation site and environmentThe operation site for the glider will be off the Mid-Norwegian coast with water depths ranging from approximately 50 m to 400 m primarily in areas that are either earmarked for the construction of offshore wind parks or where these have already been established. The gliders will encounter high and variable current speeds reaching 1 m/s, and vertical density differences of up to 8 kg/m3 during the same mission. Surface layer salinities close to the coast can vary at short timescales. The sampling is planned for the, at minimum, upper 150 m of the water column or to 20 m distance above seabed or closer when water depths are shallower.b.
Monitoring scopeThe gliders will contribute to the monitoring of essential ocean variables off the Mid-Norwegian coast (e.g. temperature, salinity, phytoplankton biomass and growth, zooplankton quantification and dynamics, nutrients and coloured dissolved organic matter, marine mammals) and variables related to offshore wind installations (noise, turbidity). Near real-time salinity and temperature as a function of depth and geographical position from the gliders may be used for data assimilation with operational oceanographic models by The Norwegian Meteorological Institute. Mission lengths of up to two months, with flexible sampling schemes are planned. Flexible is to be understood as sensors sampling at a set duty cycle in a set portion of the water column, and the parameters for the CTD and other sensors can be different. The glider must be buoyancy propelled.
