Supplement to: Gao, Kunshan; Xu, Juntian; Gao, Guang; Li, Yahe; Hutchins, David A; Huang, Bangqin; Wang, Lei; Zheng, Ying; Jin, Peng; Cai, Xiaoni; Häder, Donat-Peter; Li, Wei; Xu, Kai; Liu, Nana; Riebesell, Ulf (2012): Rising CO2 and increased light exposure synergistically reduce marine primary productivity. Nature Climate Change, 2, 519–523, https://doi.org/10.1038/nclimate1507