Rising surface ocean dissolved inorganic carbon at the Hawaii Ocean Time-series site

.Surface ocean dissolved inorganic carbon DIC and titration alkalinity have been measured for 7 years as a part of the .Hawaii Ocean Time-series HOT program. The time-series data set displays an interannual increase in the inventory of surface ocean DIC which we interpret as a response to increasing atmospheric carbon dioxide concentrations. The rate of increase in surface ocean DIC at the open ocean HOT site is approximately 1 mmol kgy1 yry1 with a 95 % confidence interval of 0.72 to 1.37 mmol kgy1 yry1. This accumulation rate is consistent with the rate of increase predicted from the rise in boundary layer p. q 1998 Elsevier Science B.V.CO