P16N

• Nitrate (SIO)
• Phosphate (SIO)
• Silicate (SIO)
• Oxygen (SIO)
• TCO₂ (Feely - PMEL) - +4 µmol/kg correction recommended.
• Crossovers:
  

  Crossing #	old #	Latitude	Longitude	Cruise 1	Cruise 1 Sta	Cruise 2	Cruise 2 Sta	Delta	Stdev
  47	17	53° N	152° W	P16N	58,59,66	P17N	78	-9.0	5.1
  49		30° N	152° W	P16N	30,31,32	P2	70	-7.6	3.0
  MEAN								-8.3	1.0

• Precision of Duplicate Measurements - No Information.
• CRM Results - CRM batch was bad. Precision 1.2-3 µmol/kg.
• Multiparameter Analysis (details) - Mean Difference (estimated - measured) = 3.1 ± 4.1
• Isopycnal Analysis - Results of our isopycnal analysis of P2 and P16N TCO₂ near 30° N, 152° W indicates consistently higher TCO₂ values (8-10 µmol/kg) in deep water on the P2 line as compared with P16N (Figure). The P14 data along 179° W also show slightly higher deep water values (mean = 4 µmol/kg) than the P16N results. In the previous crossover and MLR analyses P14 showed no obvious offsets, whereas the P2 were generally found to be high and the P16N data were consistently low. The results of the isopycnal analysis can be reconciled with the findings of the other methods if the P16N data are increased by ~4 µmol/kg and the P2 data are decreased by 4-6 µmol/kg.
• Alkalinity - (Not Measured)
• fCO₂ - (Not Measured)
• pH (Byrne - USF) - We recommend adjusting all spectrophotometric pH values upward by 0.0047 to be internally consistent with the other carbon parameters.