Dissolved Zinc in the Southern Ocean measured on water bottle samples during POLARSTERN cruise ANT-XXIV/3 ...

• Main Authors: Croot, Peter L, Baars, Oliver, Streu, Peter
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, water; Pressure, water; Bottle number; Temperature, water; Salinity; Phosphate; Silicate; Nitrate and Nitrite; Nitrite; Zinc, dissolved; CTD/Rosette, ultra clean; Element analyser AAS, graphite furnace, Perkin-Elmer 4100 ZL; ANT-XXIV/3; Polarstern; Global marine biogeochemical cycles of trace elements and their isotopes GEOTRACES; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Arctic; Antarctic; Southern Ocean; The Antarctic; Weddell Sea; Austral; Drake Passage; Weddell; Titan; Antarc*; IPY; Phytoplankton; Sea ice; Zooplankton
• Online Access: https://dx.doi.org/10.1594/pangaea.824662; https://doi.pangaea.de/10.1594/PANGAEA.824662

The distribution of dissolved zinc (Zn) was investigated in the Atlantic sector of the Southern Ocean in the austral autumn of 2008 as part of the IPY GEOTRACES expedition ZERO & DRAKE. Research focused on transects across the major frontal systems along the Zero Meridian and across the Drake Passage. There was a strong gradient in surface zinc concentrations observed across the Antarctic Polar Front along both transects and high zinc levels were found in surface waters throughout the Southern Ocean. Vertical profiles for dissolved Zinc showed the presence of local minima and maxima in the upper 200 m consistent with significant uptake by phytoplankton and release by zooplankton grazing, respectively. Highest deep water zinc concentrations were found in the centre of the Weddell Gyre associated with Central Intermediate Water (CIW), a water mass which is depleted in O2, elevated in CO2 and is regionally a CFC minimum. Our data suggests that the remineralization of sinking particles is a key control on ... : Sample Collection and Storage Samples were collected during the IPY GEOTRACES Polarstern cruise ANT-XXIV/3 along the Zero Meridian, in the Weddell Sea and Drake Passage between February and April 2008. All samples reported here were collected using the TITAN trace metal clean rosette belonging to the NIOZ (de Baar et al., 2008, doi:10.1016/j.marchem.2007.07.009). Upon recovery of the rosette the complete rosette was carefully moved into a Class 100 clean room container specially built for sampling from this system. Care and maintenance of the GO-FLO bottles was performed by NIOZ technicians using the IPY-GEOTRACES protocols. In the sampling clean room, filtered water samples were collected using slight N2 overpressure and filtration through 0.2 um filter cartridges (Sartorius) from the relevant GO-FLO into 1 L acid-cleaned low density polyethylene bottles for later analysis (acidified onboard with Q-HCl, 1mL/L) in the laboratory in Kiel. Determination of total dissolved Zinc Samples were analyzed in the ...