Description: This dataset contains repeated measurements of seawater pH and total alkalinity recorded in the alkalinization mesocosms, a set of tanks without oysters that received the same alkalinity treatments as the exposure mesocosms reported in a companion dataset. Total alkalinity was raised in three alkalization cycles to reach target increases of +250 or +500 µmol/kg over unamended seawater, using either dissolved alkalinity addition (NaOH and CaCl2) or olivine-based coastal enhanced silicate weathering. The three cycles ran 17 April to 7 May 2024, 8 May to 27 May 2024 and 30 May to 19 June 2024. Measurements were taken predominantly in triplicate per treatment and sampling day. Seawater pH was measured with a pH electrode and total alkalinity by open-cell potentiometric titration, both on a Metrohm 855 Robotic Titrosampler.
Global identifier:
Doi(
"10.1594/PANGAEA.996214",
)
DataMeasurements(
DataMeasurements {
domain: Unspecified,
station: None,
measured_variables: [
"Alkalinity, total",
"Event label",
"Experiment day",
"Incubation type",
"Replicates",
"Sampling date/time, experiment",
"Treatment",
"Type of study",
"pH",
],
methods: [],
},
)
Tags: Europäische Auster ? Auster ? Meerwasser ? Studie ? REACH ? ecotoxicology ? ocean alkalinity enhancement ?
Region: Helgoland
Bounding boxes: 7.888944° .. 7.888944° x 54.180327° .. 54.180327° 7.88458° .. 7.88458° x 54.18213° .. 54.18213°
License: Creative Commons Namensnennung 4.0 (Data access requires registration)
Language: Englisch/English
Issued: 2026-07-29
Modified: 2026-07-29
Last harvest: 13.08.2026 02:15
Time ranges: 2024-04-17 - 2025-03-12
Accessed 2 times.