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

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 CTD Niskin bottles at six different depths from the upper 100 to 180 m. The same water samples as in Bracher (2019) are filtered for CDOM absorption analysis 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.881076.