Chlorophyll pigments and total organic carbon measured during POLARSTERN cruise PS94 (TransArcII) to the Barents Sea and central Arctic ...

• Main Authors: Kiesel, Joshua, Bienhold, Christina, Link, Heike
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Barents Sea; central Arctic Ocean; Climate change; microbial abundance; organic-matter; Sediment oxygen uptake; Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Carbon, organic, total; Chlorophyll a, per unit sediment volume; Phaeopigments, per unit sediment volume; Chlorophyll pigment equivalents; Chlorophyll a/chloroplastic pigment equivalents ratio; Comment; MultiCorer; Giant box grab; Giant box corer; Gas chromatography with Carlo Erba NA-1500 CNS elemental analyzer; Turner Trilogy fluorometer; PS94; Polarstern; Assessment of bacterial life and matter cycling in deep-sea surface sediments ABYSS; System Laptev-Sea Transdrift TRANSDRIFT; Arctic; Arctic Ocean; laptev; Laptev Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.907887; https://doi.pangaea.de/10.1594/PANGAEA.907887

Chlorophyll pigments:Subsamples of the top first cm of sediment were obtained using cut-off plastic syringes. Samples for chlorophyll pigment analyses were stored dark and frozen at -20°C until further analyses in the home laboratory. Chlorophyll pigments were extracted as described in Boetius et al. (1998, https://doi.org/10.1016/S0967-0637(97)00052-6). Briefly, pigments were extracted in 90% acetone, after addition of glass beads and grinding in a cell mill. Extracts were centrifuged and concentrations of chlorophyll a and phaeopigments (after acidification with HCl) were determined with a Turner Trilogy fluorometer. The sum of chlorophyll a and phaeopigments is expressed as chloroplast pigment equivalents (CPE). The proportion of chlorophyll a from CPE (% chla) is an indicator of the freshness of phytodetritus.Total organic carbon:Subsamples of the top first cm of sediment were also obtained using cut-off plastic syringes. Samples were stored frozen at -20°C until further analyses in the home laboratory. ...