Absorption coefficients by coloured dissolved organic matter across the South Atlantic Ocean measured underway with a Liquid Waveguide Capillary Cell system during POLARSTERN cruise PS103 ...

• Main Authors: Bracher, Astrid, Liu, Yangyang, Oelker, Julia, Röttgers, Rüdiger
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: absorption; coloured dissolved organic matter CDOM; inherent optical properties; Liquid Waveguide Capillary Cell; South Atlantic Ocean; DATE/TIME; Sample ID; LATITUDE; LONGITUDE; DEPTH, water; Absorption coefficient, colored dissolved organic matter at 350 nm; Absorption coefficient, colored dissolved organic matter at 352 nm; Absorption coefficient, colored dissolved organic matter at 354 nm; Absorption coefficient, colored dissolved organic matter at 356 nm; Absorption coefficient, colored dissolved organic matter at 358 nm; Absorption coefficient, colored dissolved organic matter at 360 nm; Absorption coefficient, colored dissolved organic matter at 362 nm; Absorption coefficient, colored dissolved organic matter at 364 nm; Absorption coefficient, colored dissolved organic matter at 366 nm; Absorption coefficient, colored dissolved organic matter at 368 nm; Absorption coefficient, colored dissolved organic matter at 370 nm; Absorption coefficient, colored dissolved organic matter at 372 nm; Absorption coefficient, colored dissolved organic matter at 374 nm; Absorption coefficient, colored dissolved organic matter at 376 nm; Absorption coefficient, colored dissolved organic matter at 378 nm; Absorption coefficient, colored dissolved organic matter at 380 nm; Absorption coefficient, colored dissolved organic matter at 382 nm; Absorption coefficient, colored dissolved organic matter at 384 nm; Absorption coefficient, colored dissolved organic matter at 386 nm; Absorption coefficient, colored dissolved organic matter at 388 nm; Absorption coefficient, colored dissolved organic matter at 390 nm; Absorption coefficient, colored dissolved organic matter at 392 nm; Absorption coefficient, colored dissolved organic matter at 394 nm; Absorption coefficient, colored dissolved organic matter at 396 nm; Absorption coefficient, colored dissolved organic matter at 398 nm; Absorption coefficient, colored dissolved organic matter at 400 nm; Absorption coefficient, colored dissolved organic matter at 402 nm; Absorption coefficient, colored dissolved organic matter at 404 nm; Absorption coefficient, colored dissolved organic matter at 406 nm; Absorption coefficient, colored dissolved organic matter at 408 nm; Absorption coefficient, colored dissolved organic matter at 410 nm; Absorption coefficient, colored dissolved organic matter at 412 nm; Absorption coefficient, colored dissolved organic matter at 414 nm; Absorption coefficient, colored dissolved organic matter at 416 nm; Absorption coefficient, colored dissolved organic matter at 418 nm; Absorption coefficient, colored dissolved organic matter at 420 nm; Absorption coefficient, colored dissolved organic matter at 422 nm; Absorption coefficient, colored dissolved organic matter at 424 nm; Absorption coefficient, colored dissolved organic matter at 426 nm; Absorption coefficient, colored dissolved organic matter at 428 nm; Alvarez
• Online Access: https://dx.doi.org/10.1594/pangaea.938468; https://doi.pangaea.de/10.1594/PANGAEA.938468

Water samples were taken during the Southern Atlantic expedition PS103 with RV Polarstern from 17 Dec 2016 to 28 Jan 2017. Water samples were collected from the ship's seawater supply pumped through teflon tubing from about 11m depth during underway as described in Liu et al (2018). Water samples for CDOM absorption analysis are filtered through 0.2 µm filters and analysed onboard with a 2.5-m path length liquid waveguide capillary cell system (LWCC, WPI) following Levering et al. (2017). Details on method adaptation to our instrumentation set-up are provided in Alvarez et al. (2022). Salinity data were extracted from https://doi.pangaea.de/10.1594/PANGAEA.889513. ... : Further specifications on the measurements:a) Instrument set-up:light source: UV-VIS lamp (Mikropack DH-2000 Deuterium-Tungsten Halogen Light Source, Artisan Technology Group, USA)cuvette: Liquid Waveguide Capillary Cell system (LWCC, World Precision Instruments Inc, USA) with 197.8 cm pathlengthdetector: photodiode array spectrometer (Sensline AVASPEC-2048-RS, Avantes, Netherlands)pump: Ismatec Reglo Analogb) configurations:wavelength range of scan and resolution: 200.0-760.0 nm, 0.3 nm.slit band width: 1 nm.Dark current was recorded before each sample measurement and samples were measured against reference of MQ three times.c) further specifications about data analysis:interpolated wavelength range and resolution: 350-730 nm, 1nm. Salinity correction applied based on CTD and thermosalinograph data. ...