Also see section above.

Raw data were corrected for ingrowth, decay, isotope recoveries, detector background and blanks.

Quality Code	Definition	How to Use it
1	Sampled but not yet received.	A sample for this measurement has been drawn but the results have not yet been received. This is an internal sample inventory code. It should not be reported. See code 5 for samples that are lost.
2	No problems noted.	Not necessary (default).
3	Questionable measurement.	Does not fit cast profile, adjacent casts or other criteria. No problems were noted by the analyst.
4	Bad measurement.	Does not fit cast profile, adjacent casts or other criteria. Analytical or sampling problems are likely.
5	Sample not reported.	The sample (or analysis) was lost. A value could not be reported.
6	Mean of replicate measurements.	The value reported is a mean of replicate measurements.
7	Manual (chromatographic) peak measurement.	A normally machine-generated peak measurement was derived manually.
8	Irregular digital chromatographic peak integration.	A machine-generated peak measurement was found to be abnormal.
9	Sample not drawn from this bottle.	No sample was drawn

Additional GEOTRACES Processing:

After the data were submitted to the International Data Management Office, BODC, the office noticed that important identifying information was missing in many datasets. With the agreement of BODC and the US GEOTRACES lead PIs, BCO-DMO added standard US GEOTRACES information, such as the US GEOTRACES event number, to each submitted dataset lacking this information. To accomplish this, BCO-DMO compiled a 'master' dataset composed of the following parameters: station_GEOTRC, cast_GEOTRC (bottle and pump data only), event_GEOTRC, sample_GEOTRC, sample_bottle_GEOTRC (bottle data only), bottle_GEOTRC (bottle data only), depth_GEOTRC_CTD (bottle data only), depth_GEOTRC_CTD_rounded (bottle data only), BTL_ISO_DateTime_UTC (bottle data only), and GeoFish_id (GeoFish data only). This added information will facilitate subsequent analysis and inter comparison of the datasets.

Bottle parameters in the master file were taken from the GT-C_Bottle_GT10, GT-C_Bottle_GT11, ODF_Bottle_GT10, and ODF_Bottle_GT11 datasets. Non-bottle parameters, including those from GeoFish tows, Aerosol sampling, and McLane Pumps, were taken from the Event_Log_GT10 and Event_Log_GT11 datasets. McLane pump cast numbers missing in event logs were taken from the Particulate Th-234 dataset submitted by Ken Buesseler.

A standardized BCO-DMO method (called "join") was then used to merge the missing parameters to each US GEOTRACES dataset, most often by matching on sample_GEOTRC or on some unique combination of other parameters.

If the master parameters were included in the original data file and the values did not differ from the master file, the original data columns were retained and the names of the parameters were changed from the PI-submitted names to the standardized master names. If there were differences between the PI-supplied parameter values and those in the master file, both columns were retained. If the original data submission included all of the master parameters, no additional columns were added, but parameter names were modified to match the naming conventions of the master file.

See the dataset parameters documentation for a description of which parameters were supplied by the PI and which were added via the join method.

Additional BCO-DMO Processing Notes:

The submitted event number was 2009 for samples 5624 - 5635, while in the master file, those samples are correspond to event 2162. These values were changed to agree with master file.

Missing data were replaced wtih 'nd'.