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

DOI

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.

Identifier
DOI https://doi.org/10.1594/PANGAEA.938468
Related Identifier IsSupplementTo https://doi.org/10.1029/2022MS003126
Related Identifier References https://doi.org/10.1594/PANGAEA.898941
Related Identifier References https://doi.org/10.1594/PANGAEA.938467
Related Identifier References https://doi.org/10.1364/AO.56.006357
Related Identifier References https://doi.org/10.1364/OE.26.00A678
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.938468
Provenance
Creator Bracher, Astrid ORCID logo; Liu, Yangyang ORCID logo; Oelker, Julia ORCID logo; Röttgers, Rüdiger ORCID logo
Publisher PANGAEA
Publication Year 2021
Funding Reference German Research Foundation https://doi.org/10.13039/501100001659 Crossref Funder ID 268020496 https://gepris.dfg.de/gepris/projekt/268020496 TRR 172: ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 37056 data points
Discipline Earth System Research
Spatial Coverage (-51.595W, -71.303S, 3.765E, -48.209N)
Temporal Coverage Begin 2016-12-21T08:00:00Z
Temporal Coverage End 2017-01-28T06:11:00Z