©2020 Biological and Chemical Oceanography Data Management Office.Funded by the U.S. National Science Foundation
©2020 Biological and Chemical Oceanography Data Management Office.An automated acid-base titrator for use in aquatic carbon dioxide parameter analysis. The titrator provides standardisation and sample analysis, using the Gran titration procedure for alkalinity determination of seawater and brackish waters. It is designed for both shipboard and land based laboratory use. The precision of the instrument is 0.1 percent or higher, and sample volumes may range from 10-25 ml. Titration takes approximately 8 minutes per sample, and the repeatability is within plus or minus 1-2 micromoles per kg.
| Dataset Name | PI-Supplied Description | PI-Supplied Name |
|---|---|---|
| Concentrations, d13C and D14C data for DOC and DIC in fluids collected from North Pond Cork Observatories U1382A and U1383C and from bottom seawater in 2012, 2014 and 2017. | Total Alkalinity: AS-ALK-2 analyzer (Apollo SciTech, Newark, DE, USA) | AS-ALK-2 analyzer |
| Dissolved inorganic carbon and total alkalinity fluxes from sediment incubation experiments during four R/V Pelican cruises to the Louisiana shelf in 2017 and 2018 | For total alkalinity, a 25 ml water sample was measured in duplicate with the open-cell Gran titration method using a temperature-controlled, semi-automated titrator (AS-ALK2 Apollo Scitech). | AS-ALK2 Apollo Scitec |
| Discrete sample measurements of dissolved oxygen, dissolved inorganic carbon, and total alkalinity from US Overturning in the Subpolar North Atlantic Program (OSNAP) cruises in 2020 and 2022 (AR45 and AR69-03) | Apollo SciTech AS-ALK2 TA Analyzer | |
| Supplementary discrete sample measurements of dissolved oxygen, dissolved inorganic carbon, and total alkalinity from Ocean Observatories Initiative (OOI) cruises to the Irminger Sea Array 2018-2019 | Apollo SciTech AS-ALK2 TA Analyzer | |
| Total Alkalinity measurements were made with an AS-Alk2 alkalinity titrator (Apollo SciTech Inc.) and analyzed at 22.0+/-0.1 deg.C using gran titration of a 25 mL water sample with 0.1 M Hal solution (in 0.5 M NaCl), with a precision of +/-0.1%. | AS-Alk2 alkalinity titrator (Apollo SciTech Inc.) | |
| OOI Global Argentine Basin Array CTD and Discrete Water Sampling Data from R/V Atlantis, RVIB Nathaniel B. Palmer AT26-30, AT39-03, NBP1510, NBP1609 in the Argentine Basin from 2015-2018 (OOI Water Sample Data project) | Carbon system measurements are performed by the Wang lab (Woods Hole Oceanographic Institution). DIC and TA measurements follow the methodology of Wang and Cai (2004) with uncertainties of 2 umol/kg. DIC measurements are performed with an Apollo Sci-Tech AS-C3. TA measurements are performed with an Apollo Sci-Tech AS-ALK2 and ROSS electrode. pH measurements follow the methodology of Clayton and Byrne (1993) with an uncertainty of 0.002 pH units using an Agilent 8453. | Apollo Sci-Tech AS-ALK2 and ROSS electrode |
| OOI Global Southern Ocean Array CTD and Discrete Water Sampling Data from R/V Atlantis, RVIB Nathaniel B. Palmer, RRS Discovery AT26-29, NBP1511, NBP1610, NBP1709, DY096, DY112 in the Southern Pacific Ocean from 2015-2020 (OOI Cruise Data project) | Carbon system measurements are performed by the Wang lab (Woods Hole Oceanographic Institution). DIC and TA measurements follow the methodology of Wang and Cai (2004) with uncertainties of 2 umol/kg. DIC measurements are performed with an Apollo Sci-Tech AS-C3. TA measurements are performed with an Apollo Sci-Tech AS-ALK2 and ROSS electrode. pH measurements follow the methodology of Clayton and Byrne (1993) with an uncertainty of 0.002 pH units using an Agilent 8453. | Apollo Sci-Tech AS-ALK2 and ROSS electrode |
| Carbon system measurements are performed by the Wang lab (Woods Hole Oceanographic Institution). DIC and TA measurements follow the methodology of Wang and Cai (2004) with uncertainties of 2 umol/kg. DIC measurements are performed with an Apollo Sci-Tech AS-C3. TA measurements are performed with an Apollo Sci-Tech AS-ALK2 and ROSS electrode. pH measurements follow the methodology of Clayton and Byrne (1993) with an uncertainty of 0.002 pH units using an Agilent 8453. | Apollo Sci-Tech AS-ALK2 and ROSS electrode |