Title Processed Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) data from the International Indian Ocean Expedition 2 (IIOE2) cruise on SA Agulhas II Voyage 032, June 2018
Project International Indian Ocean Expedition 2 (IIOE2)
Authors

Mutshutshu Tsanwani
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist Production C 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, tsanwanim@environment.gov.za

Publisher Department of Forestry, Fisheries and the Environment (2023)
Contributors

Contact Person: Mutshutshu Tsanwani
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Marine Scientist Production C 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, tsanwanim@environment.gov.za

Project Member: Baxolele Mdokwana
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Technician Production A 2nd Floor, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa, BMdokwana@environment.gov.za

Abstract This is processed Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) data from the IIOE2 cruise on SA Agulhas II Voyage 032, between 18 June and 30 June 2018. The International Indian Ocean Expedition 2 is a collaborative regional cruise to build capacity and strength within Africa. The focus will be on developing students in the region in the areas of physical oceanography, chemistry, biological oceanography, benthic biodiversity, marine top predators and marine plastics.
Methods Seawater samples were collected in 500 ml bottles at selected depths from CTD Niskin bottles and spiked with 100 ul HgCl2 before sealing the glass bottle with a stopper. Samples were collected and analysed onboard using a VINDTA 3C. The accuracy was checked using certified reference materials (CRMs) obtainable from the Andrew Dickson Laboratory (for more information about the oceanic CO2 reference materials, see http://www-mpl.ucsd.edu/people/adickson/CO2_QC/). Precision was checked by analysing 10 replicate samples taken from 500 m depth at selected offshore stations. The precision for Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) was 4.25 µmol/kg and 1.51 µmol/kg, respectively. The data was cleaned to remove obvious outliers. Further data cleaning to the satisfaction of the user is recommended.
Data
Embargoed
Temporal extent 18 Jun 2018 – 30 Jun 2018
Geographic extent

Tanzania, Mozambique, South Africa

North: -4.0
South: -14.0
West: 38.0
East: 45.0

Vertical extent Max: -1.117 m
Min: -3407.006 m
Keywords DIC, Dissolved Inorganic Carbon, IIOE2, INDIAN OCEAN, International Indian Ocean Expedition 2, Mozambique, NISKIN BOTTLES, Niskin Water Sampling Bottles, SA Agulhas II, SA Agulhas II 032, TA, Tanzania, Total Alkalinity, western Indian Ocean
Related resources
  • This digital object is part of International Indian Ocean Expedition 2 (IIOE2) cruise on SA Agulhas II Voyage 032, June 2018 (10.15493/dea.mims.26052268)