Biotic water-column characteristics for stations from the North-Western Weddell Sea, Bransfield Strait, and Drake Passage (POLARSTERN cruise PS 81, ANT-XXIX/3, January-March 2013)

• Main Authors: Vanreusel, Ann, Hauquier, Frejia, Beuselinck, Bart, Van Gansbeke, Dirk, Viaene, Niels, Veit-Köhler, Gritta
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Antarctic; ANT-XXIX/3; Chlorophyll a; Cruise/expedition; CTD; CTD/Rosette; CTD-RO; Date; Date/Time of event; DEPTH; water; Elevation of event; Event label; Fluorometry; Latitude of event; Longitude of event; pigments; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS81; PS81/116-1; PS81/118-1; PS81/120-1; PS81/162-1; PS81/163-1; PS81/190-1; PS81/193-1; PS81/196-1; PS81/202-1; PS81/215-1; PS81/218-1; PS81/225-1; PS81/230-1; PS81/235-1; PS81/238-2; PS81/241-1; PS81/243-1; PS81/247-2; PS81/250-1; Sample type; Sample volume; Scotia Sea; Southern Ocean; SPP1158; Station label; Water-column parameters; Weddell Sea; Antarc*; Antarctic Peninsula; Berichte zur Polar- und Meeresforschung; Bransfield Strait; Drake Passage; Reports on Polar and Marine Research; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.932771; https://doi.org/10.1594/PANGAEA.932771

Around the Antarctic Peninsula (North-Western Weddell Sea, Bransfield Strait, Drake Passage) water samples for measurements of chlorophyll-a were collected with Niskin bottles mounted on a CTD rosette. At each station samples were taken at two depths, the chlorophyll-a maximum (Cmax, defined as the water depth with maximum fluorescence detected during in-situ profiles) and close to the seafloor (bottom). Water samples were poured over a 100-µm sieve to remove larger particles and filtered over glass fibre filters GF/C at approximately 250 mbar. Colouring of filters determined the amount of sea water used (3–5l). Filters were stored at −80°C. Chloroplastic pigments were extracted with 10ml acetone (90%), determined using a fluorimeter and expressed in µg/l. For details see Hauquier et al. (2015) and Veit-Köhler et al. (2018).