Carbonate system parameters calculated from measured TA/DIC and measured TA/pH pairs, respectively, during POLARSTERN cruise PS111 (ANT-XXXIII/2)


Aragonite undersaturation (Ωar < 1) events are projected to rapidly increase in frequency and duration in the Antarctic Weddell Sea by 2050 due to uptake of increasing amounts of anthropogenic CO2. Thecosome pteropods are bioindicators of ocean acidification (OA) because their aragonite shell dissolves easily at low Ωar. This study aimed to establish a baseline of the current shell dissolution state of the pteropod Limacina helicina antarctica in relation to the water column Ωar in the southern Weddell Sea during austral summer 2018 that can be used for monitoring of progressing OA in the Weddell Sea. The present dataset provides depth profiles of the carbonate system parameters determined on water bottle samples collected alongside the CTD casts during PS111 covering pteropod collection depth and beyond. The carbonate system was calculated with the R package 'seacarb' from measured TA/DIC and TA/pH pairs, respectively. Included in this dataset are also concentrations of silicate, phosphate and chlorophyll a.

Related Identifier
Metadata Access
Creator Lischka, Silke ORCID logo; Bach, Lennart Thomas ORCID logo; Csenteri, Katharina; Gorb, Stanislav N; Konschak, Sonja; Michels, Jan
Publisher PANGAEA
Publication Year 2024
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints);
OpenAccess false
Resource Type Dataset
Format text/tab-separated-values
Size 4932 data points
Discipline Earth System Research
Spatial Coverage (-60.799W, -77.898S, -25.724E, -73.700N); Weddell Sea
Temporal Coverage Begin 2018-02-03T00:18:00Z
Temporal Coverage End 2018-02-28T09:30:00Z