Dimethylsulphide and halocarbon concentrations taken from 10m integrated samples during the 2012 KOSMOS Finland Mesocosm experiment ...

• Main Authors: Webb, Alison L, Malin, Gill, Hopkins, Frances E, Hughes, Claire, Von Glasow, Roland, Liss, Peter S
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: DATE/TIME; Day of experiment; Mesocosm label; Treatment; Dimethyl sulfide, dissolved; Iodomethane; Diiodomethane; Iodoethane; Tribromomethane; Dibromomethane; Dibromochloromethane; Chloroiodomethane; Mesocosm experiment; Biological Impacts of Ocean Acidification BIOACID; Surface Ocean Processes in the Anthropocene SOPRAN; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.863649; https://doi.pangaea.de/10.1594/PANGAEA.863649

The Baltic Sea is a unique environment as the largest body of brackish water in the world. Acidification of the surface oceans due to absorption of anthropogenic CO2 emissions is an additional stressor facing the pelagic community of the already challenging Baltic Sea. To investigate its impact on trace gas biogeochemistry, a large-scale mesocosm experiment was performed off Tvärminne Research Station, Finland in summer 2012. During the second half of the experiment, dimethylsulphide (DMS) concentrations in the highest fCO2 mesocosms (1075-1333 µatm) were 34 % lower than at ambient CO2 (350 µatm). However the net production (as measured by concentration change) of seven halocarbons analysed was not significantly affected by even the highest CO2 levels after 5 weeks exposure. Methyl iodide (CH3I) and diiodomethane (CH2I2) showed 15 % and 57 % increases in mean mesocosm concentration (3.8 ± 0.6 pmol L-1 increasing to 4.3 ± 0.4 pmol L-1 and 87.4 ± 14.9 pmol L-1 increasing to 134.4 ± 24.1 pmol L-1 respectively) ... : Supplement to: Webb, Alison L; Leedham-Elvidge, Emma; Hughes, Claire; Hopkins, Frances E; Malin, Gill; Bach, Lennart Thomas; Schulz, Kai Georg; Crawfurd, Katharine J; Brussaard, Corina P D; Stuhr, Annegret; Riebesell, Ulf; Liss, Peter S (2016): Effect of ocean acidification and elevated fCO2 on trace gas production by a Baltic Sea summer phytoplankton community. Biogeosciences, 13(15), 4595-4613 ...