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AMT12 Bench salinometer measurements from CTD rosette bottle samples

Originator's Protocol for Data Acquisition and Analysis

Samples were taken from CTD rossette bottles to provide a calibration for the SeaBird conductivity sensors. During the cruise 171 samples were collected and processed for salinity measurement.

A Guildline Autosal 8400B (BAS) salinometer was available for use on the cruise. The main salinometer was located in the Prep Laboratory and operated at 24°C bath temperature in 21-24°C ambient lab temperature. No problems with the salinometer or its performance were noted. All samples were processed according to WOCE standards and protocols.

References Cited

BODC Data Processing Procedures

Data were submitted with the Post-Cruise Archive as a hard copy of the hand written bench salinometer logsheets. 152 samples were matched to metadata (cast and depth) using the sample numbers that were recorded on the CTD bottle firing logsheets and bench salinometer logsheets provided to BODC. There were no discrepancies compared to metadata already loaded to the database. There were two data values where the sample bottle was contaminated or damaged, these data values were indicated as suspect and have not been loaded to the database.

Replicate measurements were provided for 5 depths sampled. One set of replicates included one of the suspect values but for the remaining 4 replicate samples the mean and standard deviation were calculated and loaded to the database. No unit conversion was necessary as the units the data were supplied in the files matched the units for the parameter codes in the BODC Parameter Dictionary. The data were loaded to the database using established BODC procedures.

A parameter mapping table is provided below;

Data Quality Report

There were 2 flagged data values in the hand written sheets supplied to BODC. No additional data values were flagged by BODC.

Problem Report

Not relevant to this data set.