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Dataset: KOSMOS 2022 Bergen mesocosm study on ocean alkalinity enhancement: carbonate chemistry , CO2 flux data and calcification estimates
Dataset   Open access

Dataset: KOSMOS 2022 Bergen mesocosm study on ocean alkalinity enhancement: carbonate chemistry , CO2 flux data and calcification estimates

Julieta Schneider, Ulf Riebesell, Charly Moras, Laura Marín-Samper, Leila Kittu, Joaquin Ortiz Cortes and Kai Georg Schulz
PANGAEA
26/11/2025
DOI: https://doi.org/10.1594/pangaea.983061
Appears in  Recent Faculty of Science and Engineering Publications
url
KOSMOS 2022 Bergen mesocosm study on ocean alkalinity enhancement: carbonate chemistry , CO2 flux data and calcification estimates [dataset]. View
CC BY V4.0,  Open

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Abstract

Air-sea CO2 flux calcification carbonate system KOSMOS mesocosm ocean alkalinity enhancement
A Large-scale mesocosm experiment was conducted in the temperate fjord ecosystem near Bergen, Norway during late spring 2022 to investigate the effects of OAE on biogeochemical processes and organisms under close-to-natural conditions. A non-CO2-equilibrated approach was chosen, simulating OAE with calcium- and silicon-based minerals. A gradient of five OAE levels was achieved by increasing total alkalinity (TA) by 0–600 µmol kg-1. Carbonate chemistry parameters were monitored for the total length of the 53-day experiment. The added TA remained relatively stable over the experimental period and the measured CO2 gas exchange rate was comparable to what would be expected for large oceanic regions. The study and data set offer insights into impacts of non-equilibrated alkalinity enhancement on the carbonate system, air-sea gas exchange and carbon fixation.

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