P31
- Nitrate
- Phosphate
- Silicate
- Oxygen
- TCO2 (Winn - UH) - No adjustment recommended.
- Crossovers:
Crossing # Latitude Longitude WOCE Line Station(s) used Crosses with Station(s) used Delta TCO2 Stdev TCO2 41c 10° S 170° W P31 157,159,161 P14S15S 54,57,61 2.6 2.2 41e 10° S 170° W P31 66 EQS92 54,57,61 0.8 5.8 41f 10° S 170° W P31 130,132 P15N 54,57,61 3.2 3.6 53b 17° S 150° W P31 222 P16C 2,5 -0.6 0.8 53d 17° S 150° W P31 220 P16S17S 2,5 -0.9 0.5 53f 17° S 150° W P31 157,160 P21 2,5 2.7 3.3 MEAN 1.3 1.8 - Precision of Duplicate Measurements - No Information.
- CRM Results - Shipboard measurements off by -0.9 ± 2.7.
- Keeling Replicates - Mean difference for 8 samples was 0.21 ± 3.42.
- Alkalinity (Winn - UH) - Adjustment of -6 µmol/kg recommended.
- Crossovers:
Crossing # Old # Latitude Longitude Cruise 1 Cruise 1 Sta Cruise 2 Cruise 2 Sta TALK Delta Stdev 41c 10 10° S 170° W P14S15S 157,159,161 P31 54,57,61 -0.5 ± 3.5 (graph) 41e 10° S 170° W EQS92 66 P31 54,57,61 -7.3 ± 2.3 (graph) 41f 51 10° S 170° W P15N 130,132 P31 54,57,61 -3.2 ± 0.9 (graph) 53b 22 17° S 150° W P16C 222 P31 2,5 -3.5 ± 0.9 (graph) 53d 54 17° S 150° W P16S17S 220 P31 2,5 (graph) 53f 21 17° S 150° W P21 157,160 P31 2,5 -5.8 ± 3.5 (graph) AVERAGE -4.5 ± 2.5 - Precision of Duplicate Measurements - No Information.
- CRM Results - No Information.
- Internal Consistency Analysis (details) - Measured Alkalinity - calculated (pH&TCO2) = -1.3 ± 5.8
- Isopycnal Analysis - P31 was compared with a nearly parallel cruise (P21) that was run along 20° S and the intersecting meridional cruises P15N, P15S, and P16C (Figure). The P31 data at either end of the section, where the meridional lines intersect, are only slightly higher than the other lines. In the middle of the section, however, the P31 data are much higher than the P21 values suggesting that a correction is in order.
- fCO2 (Not Measured)
- pH (Winn - UH) - We recommend adjusting all spectrophotometric pH values upward by 0.0047 to be internally consistent with the other carbon parameters.
- Crossovers:
Crossover Longitude Latitude Cruise-1 Stations-1 Cruise-2 Stations-2 Δ Salinity Δ O2 ΔpH Feely et al. # 41 170° W 10° S P14S15S 159,161 P31 61,64 0.001 ± 0.002 0.0 ± 2.6 -0.0005 ± 0.0003 10 - Precision of Duplicate Measurements - No Information.
- CRM Results - No Information.
Crossover | Longitude | Latitude | Cruise-1 | Stations-1 | Cruise-2 | Stations-2 | ΔpH | Feely et al. # |
---|---|---|---|---|---|---|---|---|
41 | 170° W | 10° S | P14S15S | 159,161 | P31 | 61,64 | -0.0049 ± 0.001 | 10 |
Last modified: 2024-12-05T18:52:37Z