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Data Publisher for Earth & Environmental Science
Latitude: 48.933500 * Longitude: -16.583500
Date/Time Start: 1998-08-04T14:12:00 * Date/Time End: 1998-08-04T14:12:00
Minimum DEPTH, sediment/rock: 0.0000 m * Maximum DEPTH, sediment/rock: 0.1900 m
M42/2_397-1 (M42/2_MC-09) * Latitude: 48.933500 * Longitude: -16.583500 * Date/Time: 1998-08-04T14:12:00 * Elevation: -4811.0 m * Location: Bengal * Campaign: M42/2 * Basis: Meteor (1986) * Device: MultiCorer (MUC)
Total carbonate (Ct) concentrations were determined on-board ship during Discovery 222 (leg A) nd 226 cruises, using colourmetric methods (Johnsson et al., 1987) with a precision of 0.2% RSD (n=10) using a sample loop of 4ml. During Discovery 231, 236 and Meteor 42/2 cruises a newly developed system (based on infrared detection of (CO2) were used for determination of total carbonate (Goyet and Snover, 1993; OSullivan and Millero, 1998). The precision of this method was also 0.2% RSD (n=10) using a sample loop of 4ml. Samples were filtrated through disposable sterile cellulose acetate filters (0.45µm) and stored refrigerated in polyethylene vials (rinsed in MQ-water) until analysis on-board.
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2Depth, top/minDepth topmHall, Per
3Depth, bottom/maxDepth botmHall, Per
4Alkalinity, totalATmmol(eq)/lHall, PerHigh-precision potentiometric titration (Haraldsson et al., 1997)
5Carbonate ion[CO3]2-µmol/lHall, PerInfrared detection of CO2 (Goyet & Snover, 1993)
6Nitrate[NO3]-µmol/lHall, PerNutrients, CHEMLAB autoanalyser
82 data points

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