Bottle salinity series measured by CEFAS on POL Coastal Observatory cruise 8, RV Prince Madog cruise PD23_03A
Data Originator
Naomi Greenwood, CEFAS, Lowestoft
Content of data series
| Parameter | Units | Parameter code | CTD Samples |
|---|---|---|---|
| Salinity of the water column | Dimensionless | PSALBSTX | 8 |
Originator's Protocol
Samples for salinity were collected from water bottle rosette sampling systems mounted on the lowered CTD. Samples were collected near-surface from a total of 8 CTD stations.
A 200ml sample was collected in a glass bottle with an insert placed in the top after collection. Each sample was analysed in the laboratory using a Guildline autosalinometer which has been standardised with IAPSO standard seawater.
BODC Processing
The data were supplied to BODC as an Excel spreadsheet. This was converted to an ASCII format file for loading into the BODC archive. Methodology and units were checked against information held in the BODC parameter dictionary and an appropriate parameter code was attributed to each variable. The file's data and metadata fields were then checked prior to loading into a database.
During data processing, each surface sample was linked to a specific rosette bottle fired during the cast. At Station 11 this linkage had to be performed manually. CEFAS records show a surface sample collected at 1.2m at this Station. However, the CTD logsheet for Station 11 recorded bottles at positions 8, 9 and 3 all being fired at this depth. In order to be consistent with other surface bottle firings on this cruise, the surface sample for Station 11 was assigned to the bottle fired at rosette position 9.
The data were loaded into the database under the Oracle Relational Database Management System by matching the sample's station identifier and depth with the information already held in the database for this cruise. Where the data supplied included multiple replicates for each station, the mean value and standard deviation were loaded into the database. For single samples, the data were loaded without further modification.
Comments on data quality and outstanding issues
There are no data quality issues regarding this dataset.
References
None.
Conditions of Use
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