Response to: Comment on "Synchronous records of pCO2 and Δ14C suggest rapid, ocean-derived pCO2 fluctuations at the onset of Younger Dryas" (Steinthorsdottir et al., 2014, Quaternary Science Reviews 99, 84–96). (1st January 2015) - Steinthorsdottir, Margret; de Boer, Agatha M.; Oliver, Kevin I.C.; Muschitiello, Francesco; Blaauw, Maarten; Wohlfarth, Barbara