1. Quantify the marine carbon cycle in the upper ocean together with the air-sea exchange of CO2, trace gasses and particle deposition from Greenland to Antarctica.
2. Compare the roles and contributions of different ocean regions in/to physical, chemical and biological processes in the global carbon and nutrient cycles.
3. Take advantage of new technology and remote sensing to quantify the role of ocean mesoscale activity - 'ocean weather' - on the spatial variability of air-sea gas exchange of CO2 on the global scale.
Over the entire cruise track, continuous measurements of salinity, temperature and chlorophyll a and fast repetition rate fluorescence (for determination of photosynthetic capacity) will be carried out on surface water. Atmospheric CO2 fluxes, particle concentrations and concentration of nitrogen containing gases will also be measured continuously along the route. In addition, point measurements of nutrients, and plankton composition will be made and analyzed in the laboratories. On deck, air- and optical measurements will be carried. These measurements will not require stopping the ship. At selected intervals, CTD-casts with concurrent collection of water chemistry and plankton sampling will be taken. These will provide information on the hydrographic conditions and the biological activity deeper in the water column. Net and pump collection of zooplankton as well as trawl fishing for after zooplanktivore fish will also be carried out at selected intervals. These sampling programs require the stopping of the ship and their frequency can be decided in cooperation with other activities on board. On some transects an undulating platform carrying different instruments will be towed after the ship collecting measurements from 0-400 m.
Katherine Richardson (University of Aarhus Bioscience Institute)
North West Atlantic Ocean (limit 40W) Caribbean Sea