Oxygen in the Tropical Atlantic OSTRE Third Tracer Survey - Cruise No. M116/1 - May 1 - June 3, 2015 - Pointe-a-Pitre (Guadeloupe) - Mindelo (Cape Verde)

Freier Zugriff
in METEOR-Berichte; M116/1


  • Schriftenreihe:
    METEOR-Berichte; M116/1
  • Format / Umfang:
    43 pages
  • ISSN:
  • DOI:
  • Medientyp:
  • Format:
    Elektronische Ressource
  • Sprache:
  • Klassifikation:
    DDC:    550 Earth sciences and geology


Cruise M116/1 is a contribution to the DFG Collaborative Research Project (SFB) 754: "Climate-Biogeochemistry Interactions in the Tropical Ocean" with the main goal to better understand the supply of oxygen to the oxygen minimum zone (OMZ) of the Tropical Atlantic with a particular focus on the role of regional advection, mesoscale and sub-mesoscale processes for lateral and vertical oxygen fluxes. A key method is the "Oxygen Supply Tracer Release Experiment" (OSTRE), where during M116/1 the third mapping of the tracer CF3SF5 using 82 CTD stations was done. Mapping of the water mass properties, including the distributions of oxygen, transient tracers, nutrients and the carbonate system were done mostly along 11°N. A brief detour allowed for the measurements from a 1980's cruise (TTO) to be repeated. A snapshot of the synoptic ocean circulation and mixing was accomplished by shipboard ADCP observations. Ten Argo floats were deployed. One ocean-glider and one wave-glider were recovered. Finally, additional components of the cruise were dedicated to zooplankton studies, nitrogen fixation experiments and underway sampling of a broad range of biogeochemical parameters. The cruise was very successful; most systems on METEOR worked well and all planned objectives were mostly reached.