Feely R. A., C. L. Sabine, F. J. Millero, A. G. Dickson , R. A. Fine, C. A. Carlson, J. Toole,T. M. Joyce, W. M. Smethie, A. P. McNichol, and R. M. Key. 2008. Carbon Dioxide, Hydrographic, and Chemical Data Obtained During the R/V Knorr Repeat Hydrography Cruise in the Atlantic Ocean: CLIVAR CO2 Sections A20_2003 (22 September-20 October 2003) and A22_2003 (23 October-13 November, 2003). Ed. A. Kozyr. ORNL/CDIAC-154, NDP-089. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, 46 pp. doi: 10.3334/CDIAC/otg.nd089
This report presents methods, and analytical and quality control procedures for salinity, oxygen, nutrient, inorganic carbon, organic carbon, chlorofluorocarbon (CFC), and bomb carbon-14 system parameters performed during the A20_2003 and A22_2003 cruises, which took place between September 22 and November 13, 2003, aboard research vessel (R/V) Knorr under the auspices of the National Oceanic and Atmospheric Administration (NOAA) and National Science Foundation (NSF). The R/V Knorr departed Woods Hole, Massachusetts, on September 22 for the Repeat Section A20, and ended this line in Port of Spain, Trinidad, on October 20. The Repeat Section A22 started on October 23 in Port of Spain, Trinidad, and finished on November 13, 2003, in Woods Hole, Massachusetts. The research conducted was one of a series of repeat hydrography sections jointly funded by NOAA and NSF as part of the Climate Variability Program (CLIVAR)/CO2/repeat hydrography/tracer program. Samples were taken from 36 depths at 88 stations on section A20 and 82 stations on section A22.
The data presented in this report include the analyses of water samples for total inorganic carbon (TCO2), total alkalinity (TALK), dissolved organic carbon (DOC), CFC, carbon-14, hydrographic, and other chemical measurements.
The R/V Knorr A20_2003 and A22_2003 data sets are available free of charge as a numeric data package (NDP) from the Carbon Dioxide Information Analysis Center (CDIAC). The NDP consists of the oceanographic data files and this printed documentation, which describes the procedures and methods used to obtain the data.
Keywords: carbon dioxide, total CO2, total alkalinity, carbon cycle, coulometry, potentiometry, hydrographic measurements, CLIVAR, Atlantic Ocean.