PHY-02 Atlantic Ocean Variability
The 53°N observatory: 25 years time series data from the exit of the Labrador Sea  (Invited)
Johannes Karstensen* , GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Joerg Froehle, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, and University of Kiel, Kiel, Germany
Fehmi Dilmahamod, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Rebecca Hummels, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Martin Visbeck, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, and University of Kiel, Kiel, Germany
Jannes Koelling, Dalhousie University, Department of Oceanography, Halifax, NS, Canada
Dariia Atamanchuk, Dalhousie University, Department of Oceanography, Halifax, NS, Canada

Continuous Eulerian time series observations at the exit of the Labrador Sea were initiated in 1997 by a process study. This was the start of what is known today and 25 years later as the “53°N Observatory”. This presentation will review the evolution and summarize major findings of research activities related to the array and the 17 research cruises executed to maintain the mooring array. Specific attention will be given to recent work that seeks optimization of the array in respect to the parameter space by incorporating additional biogeochemical and biological sensors, and by making use of satellite data to estimate the boundary current recirculation location and strength. Long term transport variability will be discussed and the connection with oxygen transports is presented.