A10

CLIVAR/Carbon A10 in the South Atlantic on NOAA ship Ronald H. Brown was completed successfully during the period 28 September 2011 to 31 October 2011. The 2011 A10 expedition began in Cape Town, South Africa and ended in Rio de Janeiro, Brazil.  The A10 section ran nominally along the 30°S from approximately 17°W to 48°W, repeating the section previously occupied in 1992 and 2003. A total of 120 full water column CTD/O2/LADCP/rosette casts were completed along the A10 transect with nominal ~30 nautical mile (nm) spacing, with closer spacing near boundaries. Approximately 2,800 water samples were collected on these casts for analyses of a variety of parameters, including salinity, dissolved oxygen, nutrients, chlorofluorocarbons (CFCs), dissolved inorganic carbon (DIC), alkalinity, pH, carbon isotopes (14C), dissolved organic carbon (DOC), density, phytoplankton, tritium, ¹⁸O, and helium. Underway data collection included upper-ocean current measurements from the shipboard ADCP, surface oceanographic (temperature, salinity, PCO₂) and meteorological parameters from the ship’s underway systems, bathymetric data and atmospheric measurements of CO₂, CFCs, SF₆ and ozone.

Carbon Data
CTD and other hydrographic data
Section designation: A10
Chief Scientists: Molly O’Neil Baringer and Alison Macdonald
Dates 28 September 2011 to 31 October 2011
NOAA Ship Ronald H. Brown
Ports of call Cape Town, South Africa to Rio de Janeiro, Brazil
Stations: 120
Geographic boundaries: 30.018°S to 27.6°S by 14.95°E to 47.95°W