аЯрЁБс>ўџ /1ўџџџ.џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџьЅСq Пvbjbjt+t+ -AA6 џџџџџџ]ОООООООввввв о въі       КММММММ$єїŒр9О     р ОО  і    О О КввОООО К Ў КООК ъ шзнлЦвв К September 17th, 2006 N.Metzl, now at LOCEAN/IPSL, metzl@ccr.jussieu.fr WOCE-I6 section, CIVA-2 (February-March 1996) onboard R.S. Marion-Dufresne (IPEV). Total Alkalinity, TA and Total Dissolved Inorganic Carbon, TCO2 (team onboard, C.Brunet, C.Coatanoan, S. Derieux, LPCM/IPSL): Data available at :  LIENHYPERTEXTE http://cdiac.esd.ornl.gov/ftp/oceans/i06bwoce/ http://cdiac.esd.ornl.gov/ftp/oceans/i06bwoce/ Along the WOCE/I6, CIVA-2 section, TA and TCO2 were sampled at 52 stations (full-depth). Samples were collected in 500 ml pyrex flasks with a screw stopper; the flask was rinced twice with seawater and filled in order to overflow twice its volume. The measurements were made between 12 and 24 h after the sampling. A potentiometric titration derived from the method developped by Edmond (1970) was used to estimate both TCO2 and TA. The titration system was composed of a burette (Radiometer ABU 80), a pHmeter (Radiometer PHM80) and micro-computer to drive the burette and record the data. The titration curve was used as recommended in the US Department of Energy report (DOE, 1994) to determine TCO2 and TA concentrations. The acid (HCl, 0.1N) used for the titration was calibrate once or twice a day with the Certified Reference Material, CRM prepared by A. Dickson (Scripps Institution, USA). To test the precision of the method, replicate samples were taken at each station around 3000m. For all 45 replicates, the mean differences were 2.4 (Б№4.5) Еmol/kg for TA and 3.1 (Б№3.5) Еmol/kg for TCO2. The mean differences are relatively good but the large dispersions indicate bad reproductibility for few samples. If we reject these data, 5 samples for TA and 7 for TCO2, the mean difference of replicates was 0.9 (Б№0.8) Еmol/kg for TA (40 samples) and 1.9 (Б№1.6) Еmol/kg for TCO2 (38 samples). Recent analysis of these measurements have been published by Lo Monaco et al. (2005a,b). Results of the WOCE-I6S (same section) conducted in 1993 are available at : http://cdiac.esd.ornl.gov/ftp/oceans/i06woce/ References : D.O.E., Handbook of methods for analysis of the various parameters of the carbon dioxide system in sea water; version 2, A.G. Dickson and C.Goyet, eds. ORNL/CDIAC-74, 1994. Edmond J. M., High precision determination of titration of alkalinity and total CO2 of sea-water by potentiometric titration, Deep-Sea Research, 17, 737-750, 1970. Lo Monaco C., N. Metzl, A. Poisson, C. Brunet and B. Schauer, 2005.Anthropogenic CO2 in the Southern Ocean : distribution and inventory at the Indo-Atlantic boundary (WOCE line I6), J. Geophys. Res. 110, C06010, doi:10.1029/2004JC002643. Lo Monaco C., C. Goyet, N. Metzl, A. Poisson and F. Touratier, 2005. Distribution and inventory of anthropogenic CO2 in the Southern Ocean : comparison of three data-based methods. Journal Geophys. Res. . 110, C09S02, doi:10.1029/2004JC002571. 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