Dataset: GP15 DI Water Soluble Aerosols Leg 1
Deployment: RR1814

Data Processing:
Data have been corrected for field and analytical blank. Reported soluble aerosol trace element concentrations values have been normalized to the volume of air filtered during sample collection. Each sample collection period produced 36 replicate filters. Three of those filters were leached with ultrapure deionized water (DI water) to produce three measurements of soluble aerosol concentration. Data from the three replicates were averaged and reported along with the standard deviation. Outliers and replicate samples that were below the field blank value were not included in the mean. Data are marked as described in the datasheet.

Known Problems/Issues:
AEROS2 (Event 6546) was not analyzed due to exceptional contamination of the collection filters with sea spray. The data for AEROS8 (Event 6658) Cu_A_SMLH2O_CONC_HIVOL_z23pmn is the measured concentration of a single leach sample. The other two samples were less than the method limit of detection thus no standard deviation is reported.

Quality Flags:
Quality flags have been applied with the following definitions:
0 = No quality control;
1 = Good value;
2 = Probably good value;
3 = Probably bad value;
4 = Bad value;
5 = Value changed;
6 = Value Below Detection;
7 = Value in excess;
8 = Interpolated value;
9 = Missing value.

Detection Limits:
Method detection limit was calculated from 3*STDEV of the measured filter blank. Reported detection limits were not normalized by air volume and sample data were evaluated relative to the method detection limit prior to the normalization step in data processing. Data below the detection limit are flagged with code 6 and no value reported ("nd"). Detection limits are reported in the attached Supplemental File (PDF).

Concentration Averages:
Data values are averages of 3 separate filter leaches, except when values were excluded because:
(a) a value was determined to be an outlier by the Grubbs Test;
(b) a value was below the method detection limit.

BCO-DMO Processing:
- renamed fields;
- added date/time fields in ISO8601 format and removed original day, month, year, and time columns.