MCR LTER: Coral Reef: Water Column: Offshore Ocean Acidification: Water Profiles, CTD, and Chemistry, from 2005 ongoing

This data package contains water chemistry measurements taken 2 to 4 times per year at a
station 5 km offshore of the north shore of Moorea, French Polynesia. Measurements include
standard CTD parameters, phosphate, silicate, total alkalinity (TA) and total dissolved
inorganic carbon (DIC). Sampling began in August, 2005. All water samples were collected
with Niskin Bottles. This data includes excerpts from CTD data were collected with a SBE19-Plus Seacat Profiler. CTD and
bottle samples were taken on separate casts at each station. (For full CTD data refer to knb-lter-mcr.10 .) All other parameters were calculated from temperature, pressure, nutrients, TA and DIC
with CO2Sys programs available at: http://cdiac.ornl.gov/oceans/co2rprt.html (Lewis E. and D. Wallace Program
Developed for CO2 System Calculations) using constants K1, K2 from Mehrbach et al, 1973
refit by Dickson and Millero, 1987, Dickson KHSO4, and the Seawater pH scale (mol/kg-SW). If
users wish to use different constants and scales, they will need to recalculate using the
emperically collected data (TA and DIC).