Concentrations of chlorophyll a, phaeopigments, and particulate matter during the iron fertilization experiment EIFEX in 2004 ...

• Main Authors: Klaas, Christine, Assmy, Philipp, Benner, Ina, Berg, Gry Mine, Mills, Matthew M, Passow, Uta, Schmidt, Maike M, Terbrüggen, Anja, Wolf-Gladrow, Dieter A, Smetacek, Victor
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: ANT XXI/3; dissolved in organic carbon DIC; Dissolved Organic Matter; particulate organic matter; Event label; DATE/TIME; LATITUDE; LONGITUDE; Station label; Cast number; Duration, number of days; DEPTH, water; Chlorophyll a; Phaeopigments; Phosphorus, organic, particulate; Nitrogen, organic, particulate; Carbon, organic, particulate; Biogenic silica; Position; CTD/Rosette; Fluorometer, Turner Designs, 10-AU; According to Knap et al. 1996; Colorimetry according to Hansen and Koroleff 1999; Elemental analyzer; Decarbonation and preservation method according to Lorrain et al. 2003; Wet alkaline digestion method according to Müller and Schneider 1993; ANT-XXI/3; Polarstern; Antarc*; Antarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.954829; https://doi.pangaea.de/10.1594/PANGAEA.954829

Here we present concentrations of chlorophyll a, phaeopigments, particulate organic carbon and nitrogen from water samples collected at discrete depths with a CTD-rosette during the European Iron Fertilization Experiment (EIFEX). The experiment was carried out from February 11 to March 20, 2004 in the 60-km diameter, rotating core of an eddy, formed by a meander of the Antarctic Polar Front (centred at around 49°10' S and 2°10' E). Samples were taken within the eddy inside and outside the fertilized patch, and in a few cases outside the eddy.Chlorophyll concentrations were determined by fluorometry using a Turner Design Model 10-AU digital fluorometer. Sampling, measurements and calibration of the fluorometer was carried out following the JGOFS protocol procedure (Knap et al, 1996). Results of the fluorometer calibration diverged by 5% between beginning and end of the cruise. Chlorophyll a content was calculated using average parameter values from the two calibrations. Measurement uncertainty was estimated ...