Description: This data collection comprises sedimentary porewater, solid-phase, microprofile measurements, cell counts and microbial sulfate reduction rates, from a calcite amendment laboratory experiment. The sediment cores for the experiment were collected in Kiel Bight in February 2025 (cruise L25-02b). For that, six sediment cores were collected and kept in MUC core liner in the dark in the cool room at 8°C for the timespan of the experiment at GEOMAR, Kiel. Furthermore, water sample data from within the core liner were taken at regular timesteps. Three sediment cores were incubated with 7.86 g of grounded limestone (>99% calcium carbonate) distributed at the sediment surface; additional three unamended treatments were used as reference. All sediment cores were kept under controlled oxygen depletion and subsequent reoxidation cycles. Data includes organic carbon (COrg), calcium carbonate (CaCO3), sulfur (S, %) and data from sequential iron (Fe) extraction from solid-phase, calcium ions, Fe total, manganese (Mn) total (ICP-OES), sulfate (ion chromatography, IC), total alkalinity, hydrogen sulfide and nutrients from porewaters as well as sulfate reduction rates. Bottom water chemistry on top of the sediment core was monitored via optical oxygen sensors, alkalinity was titrated, calcium ion concentrations determined over time and dinitrogen was measured at the end of the experiments. High resolution electrochemical microprofiles resolved vertical gradients of sulfide, oxygen, pH and redox across the sediment-water interface. These datasets enable assessments of calcite dissolution, alkalinity generation and microbial responses to enhanced benthic weathering in seasonally hypoxic Baltic Sea sediments.
Global identifier:
Doi(
"10.1594/PANGAEA.997072",
)
DataMeasurements(
DataMeasurements {
domain: Unspecified,
station: None,
measured_variables: [],
methods: [],
},
)
Tags: Calciumcarbonat ? Sulfid ? Eisen ? Nährstoff ? Sensor ? Bodenwasser ? Wasserprobe ? Sediment ? Laborversuch ? Carbon Dioxide Removal ? Daten ? Datenerhebung ? Ostsee ? Candidatus Electrothrix ? Ocean Alkalinity Enhancement (OAE) ? Transcriptomics ? cable bacteria ? enhanced weathering ? seasonal hypoxia ?
Bounding boxes: 10.177832999999996° .. 10.177832999999996° x 54.57216700000001° .. 54.57216700000001°
License: Creative Commons Namensnennung 4.0 (Data access requires registration)
Language: Englisch/English
Modified: 2026-09-17
Last harvest: 29.09.2026 14:16
Time ranges: 2025-02-18 - 2025-03-21
Accessed 1 times.