Data Processing:
Data were processed using ESI SC version 2.9.0.380.

Data Quality Flags:
The standard Ocean Data View (ODV) / SeaDataNet qualifying flags were used (reference all flags at http://vocab.nerc.ac.uk/collection/L20/current/).

1: Good Value: Good quality data value that is not part of any identified malfunction and has been verified as consistent with real phenomena during the quality control process. [Used when replicates were in good agreement and/or when dataset agreed with previously published results].

2: Probably Good Value: Data value that is probably consistent with real phenomena but this is unconfirmed. [Used when data is oceanographically consistent but no replicates or published datasets to compare with.]

3: Probably Bad Value: Data value recognized as unusual during quality control that forms part of a feature that is probably inconsistent with real phenomena. [Used when data not oceanographically consistent but replicate analyses agreed.]

4: Bad Value: An obviously erroneous data value. [Used when replicates did not agree].

5: Changed Value: Data value adjusted during quality control. [Not used.]

6: Value Below Detection Limit: The level of the measured phenomenon was too small to be quantified by the technique employed to measure it. Values are replaced with 'nd' for 'not detectable'. [Not used. See Table 1 (Supplemental File) for detection limits.]

7: Value in Excess: The level of the measured phenomenon was too large to be quantified by the technique employed to measure it. The accompanying value is the measurement limit for the technique. [Not used.]

8: Interpolated Value: This value has been derived by interpolation from other values in the data object. [Not used.]

9: Missing Value: The data value is missing. Any accompanying value will be a magic number representing absent data. [Not used.]

A: Value Phenomenon Uncertain: There is uncertainty in the description of the measured phenomenon associated with the value such as chemical species or biological entity. [Not used.]

BCO-DMO Processing:
- converted SAMPLING_DATE column to YYYY-MM-DD format;
- added the ISO_DateTime_UTC field;
- renamed fields to comply with BCO-DMO naming conventions.