3 Matching Results

Search Results

Advanced search parameters have been applied.

Measurements of the total CO[sub 2] concentration and partial pressure of CO[sub 2] in seawater during WOCE expeditions in the South Pacific Ocean

Description: During the first year of the grant, we participated in three WOCE expeditions (a total of 152 days at sea) in the South Pacific Ocean, and the field phase of the proposed investigation has been successfully completed. The total CO[sub 2] concentration and pCO[sub 2] were determined at sea in 4419 water samples collected at 422 stations. On the basis of the shipboard analyses of SIO Reference Solutions for CO, and a comparison with the results of previous expeditions, the overall precision of our total CO[sub 2] determinations is estimated to be about [plus minus]2 uM/kg. The deep water data indicate that there is a CO[sub 2] maximum centered about 2600 meters deep. This appears to represent a southward return flow from the North Pacific. The magnitude and distribution of the CO, maximum observed along the 135.0[degrees]W meridian differ from those observed along the 150.5[degrees]W meridian due to Tuamotu Archipelago, a topographic high which interferes with the southward return flow. The surface water pCO[sub 2] data indicate that the South Pacific sub-tropical gyre water located between about 15[degrees]S and 50[degrees]S is a sink for atmospheric CO[sub 2].
Date: June 29, 1993
Creator: Takahashi, T.; Goddard, J. G.; Chipman, D. W. & Rubin, S. I.
Partner: UNT Libraries Government Documents Department

Investigation of carbon dioxide in the central South Pacific Ocean (WOCE Sections P-16C and P-17C) during the TUNES/2 expedition of the R/V Thomas Washington, July--August, 1991. Final technical report

Description: This report summarizes the results of carbon dioxide and associated hydrographic measurements made during the oceanographic expedition, TUNES/2, aboard the R/V Thomas Washington in the central South Pacific Ocean. During the 40 day expedition, the total carbon dioxide concentration in 1000 seawater samples were determined using a coulometer system and the pCO(sub 2) in 940 seawater samples were determined using an equilibrator/gas chromatograph system. The alkalinity values in 900 water samples were computed using these measurements. In addition, 156 coulometric measurements were made for the Certified Reference Solutions (Batch No. 6) and yielded a mean value of 2303.2 +or- 1.5umol/kg. The chemical characteristics for the major water masses have been determined.
Date: December 1, 1993
Creator: Takahashi, T.; Goddard, J. G.; Rubin, S.; Chipman, D. W. & Sutherland, S. C.
Partner: UNT Libraries Government Documents Department

Carbon dioxide, hydrographic, and chemical data obtained in the South Pacific Ocean (WOCE Sections P16A/P17A, P17E/P19S, and P19C, R/V Knorr, October 1992--April 1993)

Description: This data documentation discusses the procedures and methods used to measure total carbon dioxide concentration (TCO{sub 2}) and partial pressure of CO{sub 2} (pCO{sub 2}) in discrete water samples collected during three expeditions of the Research Vessel (R/V) Knorr in the South Pacific Ocean. Conducted as part of the World Ocean Circulation Experiment (WOCE), the first cruise (WOCE Section P16A/P17A) began in Papeete, Tahiti, French Polynesia, on October 6, 1992, and returned to Papeete on November 25, 1992. The second cruise (WOCE Section P17E/P19S) began in Papeete on December 4, 1992, and finished in Punta Arenas, Chile, on January 22, 1993. The third expedition (WOCE Section P19C) started in Punta Arenas, on February 22 and finished in Panama City, Panama, on April 13, 1993. During the three expeditions, 422 hydrographic stations were occupied. Hydrographic and chemical measurements made along WOCE Sections P16A/P17A, P17E/P19S, and P19C included pressure, temperature, salinity, and oxygen [measured by conductivity, temperature, and depth (CTD) sensor], as well as discrete measurements of salinity, oxygen, phosphate, nitrate, nitrite, silicate, chlorofluorocarbons (CFC-11, CFC-12), TCO{sub 2}, and pCO{sub 2} measured at 4 and 20 C. In addition, potential temperatures were calculated from the measured variables.
Date: June 1, 1998
Creator: Rubin, S.; Goddard, J.G.; Chipman, D.W.; Takahashi, Taro; Sutherland, S.C.; Reid, J.L. et al.
Partner: UNT Libraries Government Documents Department