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, https://doi.org/10.5194/bg-13-4595-2016