The analysis of dimethylsulfide and dimethylsulfoniopropionate in sea ice:Dry-crushing and melting using stable isotope additions

• Published in: Marine Chemistry
• Main Authors: Stefels, Jacqueline, Carnat, Gauthier, Dacey, John W. H., Goossens, Thomas, Elzenga, J. Theo M., Tison, Jean-Louis
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2012
• Subjects: Sea ice; Methodology; Sulfur compounds; DMS; DMSP; Ice algae; Climate; REACTION MASS-SPECTROMETRY; ALGAL PIGMENTS; SOUTHERN-OCEAN; MARINE-ALGAE; WEDDELL SEA; PACK ICE; ROSS SEA; ANTARCTICA; PHYTOPLANKTON; Ross Sea; Southern Ocean; Weddell; Weddell Sea; Antarc*; Antarctica; ice algae
• Online Access: https://hdl.handle.net/11370/da3417dd-0080-4219-8610-cc49294ff2f3; https://research.rug.nl/en/publications/da3417dd-0080-4219-8610-cc49294ff2f3; https://doi.org/10.1016/j.marchem.2011.09.007

Sea ice is thought to be an important source of the climate-active gas dimethylsulfide (DMS), since extremely high concentrations of its precursor dimethylsulfoniopropionate (DMSP) have been found associated with high algal biomass. Accurate measurements of DMS and associated compounds in sea ice were until now not possible due to difficulties associated with the unavoidable melting process before analysis. Here we present and evaluate two methods to analyze DMS and DMSP in sea-ice cores accurately. The first, describes the dry-crushing method, which has its focus on the volatile compound DMS. A sub-sample of deeply frozen (