A hydrographic survey consisting of CTDO (conductivity, temperature, pressure, oxygen), LADCP (lowered acoustic Doppler current profiler), rosette water samples, underway shipboard ADCP and bio-optical casts in the south eastern Pacific Ocean was conducted aboard the UNOLS vessel R/V Melville from January 5 - February 11, 2010. A total of 123 CTD/LADCP/Rosette casts and 31 bio-optical casts were completed. CTD casts were collected to within 10 meters of the seafloor and up to 36 water samples were acquired at different depth levels on the upcast. Salinity, dissolved oxygen and nutrient samples were analyzed and used to calibrate the CTD conductivity and oxygen sensors for each cast. Water samples were also analyzed on board the ship for dissolved inorganic carbon (DIC), pH, total alkalinity, and transient tracers (CFCs and SF6). Additional water samples were collected and stored for analysis onshore: dissolved organic carbon (DOC), helium/tritium , 13C/14C, chromophoric dissolved organic matter (CDOM), chlorophyll-a, bacterial cell count, particulate organic carbon (POC), δ15N in nitrate, and 14C in DOC. Underway measurements included surface pCO2, temperature, conductivity, dissolved oxygen, fluorescence, various meteorological parameters and bathymetry.

Carbon Data
CTD and other hydrographic data
WOCE Section Designation: P06
Chief Scientists: Ruth Curry and Elizabeth Douglass
Dates: 5 Jan 2010 - 11 Feb 2010
Ship: R/V Melville
Ports of call: Papeete, Tahiti -Valparaiso, Chile
Stations 127
Geographic Boundaries: 32°29.83' S to 32°30.26' S by 145°50.5' W to 71°42.26' W

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