Inorganic nutrients measured on water bottle samples from CTD/Water sampler-system during RV POLARSTERN cruise PS129

• Main Authors: Graeve, Martin, Ludwichowski, Kai-Uwe, Hoppema, Mario, Reeve, Krissy A
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Ammonium; Bottle number; Campaign; Cast number; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH; water; ELEVATION; Event label; HAFOS; LATITUDE; LONGITUDE; Nitrate; Nitrite; Phosphate; Polarstern; PS129; PS129_100-3; PS129_102-1; PS129_103-1; PS129_104-1; PS129_105-1; PS129_106-1; PS129_107-1; PS129_109-3; PS129_110-1; PS129_111-1; PS129_112-1; PS129_114-2; PS129_116-1; PS129_117-1; PS129_119-1; PS129_120-1; PS129_121-1; PS129_122-1; PS129_123-1; PS129_18-7; PS129_23-1; PS129_25-8; PS129_27-2; PS129_30-1; PS129_40-2; PS129_41-2; PS129_42-1; PS129_47-1; PS129_49-1; PS129_53-3; PS129_54-3; Antarctic; The Antarctic; Weddell Sea; Weddell; Joinville; Joinville Island; Antarc*
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.962774; https://doi.org/10.1594/PANGAEA.962774

The aim of the sub-project HAFOS-nutrients was to determine the nutrients phosphate, nitrate, silicate, nitrite and ammonium in water samples from the entire water column in order to obtain nutrient sections through the Weddell Sea: 954 water samples were taken, in total; 4770 data points for all the different nutrients were measured. The determination of nutrients and biogeochemical parameters is closely connected with physical and biological investigations. The development of phytoplankton blooms and particulate organic matter flux is especially dependent on the available nutrients. Nutrients are also well suited as tracers for the identification of water masses. This work was carried out to continue the investigation of the seasonal as well as the interannual variability of nutrients in the Antarctic Circumpolar Current (ACC) and the Weddell Gyre. In comparison to similar transects of former years, our work focused especially on the transect from Kapp Norvegia to Joinville Island (Hoppema et al., 2015).