Main contacts: Paul Dodd (CTD and tracers) & Laura de Steur (moorings)
An array of up to 15 moorings has been maintained in Fram Strait since the 1990s by NPI (western Fram Strait) and AWI (eastern Fram Strait). Figure: Norwegian Polar Institute
An array of up to 15 moorings has been maintained in Fram Strait since the 1990s. The array is jointly operated by the Norwegian Polar Institute, which maintains moorings in the Arctic outflow in western Fram Strait, and the Alfred Wegener Institute, which maintains moorings in the Atlantic inflow in eastern Fram Strait.
One of the principal goals of the Norwegian Polar Institute is to monitor the freshwater flux in the East Greenland Current and over the East Greenland Shelf. Moorings in the outflow are equipped with instruments that provide a high-resolution continuous time series of temperature, salinity, velocity and sea ice thickness.
The Norwegian Polar Institute’s moorings are serviced annually in August/September and at these times hydrographic and tracer measurements are collected at 30 annually repeated stations between 10° W and 10° E. Tracer measurements are used to separate different types of freshwater in the Arctic Ocean outflow, such as:
- sea-ice melt water
- river input
- Pacific inflow
In order to record signals in the fast changing Arctic and understand the impact on the climate system it is essential to maintain continuous measurements at this key site in the Arctic Ocean in the future. Recent improvements to the array include specially adapted instruments that measure temperature and salinity just below the sea ice that covers the surface of the East Greenland Current and automatic water samplers that collect tracer samples year-round at key locations.