Ríos, A.F., L. Resplandy, M.I. García-Ibáñez, N.M. Fajar, A. Velo, X.A. Padin, R. Wanninkhof, et al. 2015. “Decadal Acidification in the Water Masses of the Atlantic Ocean”. Proceedings of the National Academy of Sciences of the United States of America 112: 9950-55. doi:10.1073/pnas.1504613112.