This data set includes bottle chemical data and in-situ sensor profiles. Please refer to previous years for analytical procedures for Niskin bottle data. Alkalinity and barium are forthcoming in early 2011. The in-situ chemical sensor profiling was conducted with a Satlantic ISUS nitrate sensor that was on the same pumped sample stream as an SBE43 O2 sensor and the SBE19+ CTD. All of these data streams have been merged for the purposes of serving the nitrate data in 1-m bins. See the Read-Me file for details of the data processing.