P21
- Nitrate
- Phosphate
- Silicate
- Oxygen
- TCO2 (Millero - RSMAS) - No addjustment recommended.
- Crossovers:
Crossing # Latitude Longitude WOCE Line Station(s) used Crosses with Station(s) used Delta TCO2 Stdev TCO2 42 17° S 170° W P21 141,142,144 P14S15S 193,195,197 2.3 0.4 53c 17° S 150° W P21 222 P16C 157,160 1.4 1.4 53e 17° S 150° W P21 220 P16S17S 157,160 0.8 1.0 53f 17° S 150° W P21 157,160 P31 2,5 2.7 3.3 65 16° S 133° W P21 148 P16S17S 131 0.5 1.7 74 17° S 103° W P21 105,106 P18 77 2.7 1.5 80 16° S 86° W P21 333 P19 49 3.1 0.9 MEAN 1.9 1.0 - Precision of Duplicate Measurements - No Information.
- CRM Results - Shipboard measurements off by 0.9 ± 1.1. Data were adjusted for offset.
- Keeling Replicates- Mean difference for 15 samples was -2.25 ± 1.49
- Alkalinity (Millero - RSMAS) - No adjustment recommended.
- Crossovers:
Crossing # Old # Latitude Longitude Cruise 1 Cruise 1 Sta Cruise 2 Cruise 2 Sta TALK Delta Stdev 42 6 17° S 170° W P14S15S 141,142,144 P21 193,195,197 0.34 ± 0.35 (graph) 53c 20 17° S 150° W P16C 222 P21 157,160 -0.4 ± 2.2 (graph) 53e 53 17° S 150° W P16S17S 220 P21 157,160 7.1 ± 0.9 (graph) 53f 21 17° S 150° W P31 2,5 P21 157,160 5.8 ± 3.5 (graph) 65 25 16° S 133° W P16S17S 148 P21 131 -20.5 ± 1.7 (graph) 74 36 17° S 103° W P18 105,106 P21 77 -0.5 ± 2.8 (graph) 80 40 16° S 86° W P19 333 P21 49 -2.9 ± 1.6 (graph) AVERAGE -1.6 ± 9.1 - Precision of Duplicate Measurements - No Information.
- CRM Results - No Information.
- Internal Consistency Analysis (details) - Measured Alkalinity - calculated (pH&TCO2) = 5.4 ± 4.8
- fCO2 (Not Measured)
- pH (Millero - RSMAS) - We recommend adjusting all spectrophotometric pH values upward by 0.0047 to be internally consistent with the other carbon parameters. Note: pH was determined by potentiometry on P21E (station 3 to 160). On P21W (station 166 to 276), pH was measured by spectrophotometric technique using an indicator.
- Crossovers- No Information.
- Precision of Duplicate Measurements - No Information.
- CRM Results - No Information.
Last modified: 2021-03-17T18:30:27Z