Discrete profile measurements of dissolved inorganic carbon, total alkalinity, pH on total scale and other hydrographic and chemical data obtained during the R/V Mirai cruise in the North Pacific Ocean, East China Sea and Japan Sea on GO-SHIP/CLIVAR Repeat Hydrography Section P03 Leg 3 (EXPOCODE 49NZ20060120) from 2006-01-20 to 2006-01-30 (NCEI Accession 0176230)
INVESTIGATORS:
Shuichi Watanabe
- JAMSTEC; Mutsu Institute for Oceanography (MIO)
Akihiko Murata 
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC)PACKAGE DESCRIPTION: This dataset includes discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity, pH on total scale, chlorofluorocarbons (CFCs), temperature, salinity, oxygen, nutrients, delta C14, delta C13, and other variables measured during the R/V Mirai cruise in the North Pacific Ocean, East China Sea and Japan Sea on GO-SHIP/CLIVAR Repeat Hydrography Section P03 Leg 3 (EXPOCODE 49NZ20060120) from 2006-01-20 to 2006-01-30.
CITE AS: Watanabe, Shuichi; Murata, Akihiko; Aoyama, Michio; Kumamoto, Yuichiro; Kawano, Takeshi (2018). Discrete profile measurements of dissolved inorganic carbon, total alkalinity, pH on total scale and other hydrographic and chemical data obtained during the R/V Mirai cruise in the North Pacific Ocean, East China Sea and Japan Sea on GO-SHIP/CLIVAR Repeat Hydrography Section P03 Leg 3 (EXPOCODE 49NZ20060120) from 2006-01-20 to 2006-01-30 (NCEI Accession 0176230). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/dn8z-p759. Accessed [date].
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0176230
NCEI DOI: https://doi.org/10.25921/dn8z-p759
EXPOCODE: 49NZ20060120;
CRUISE ID: P03W;
SECTION/LEG: GO-SHIP P03;
TYPES OF STUDY:
Discrete measurement;
TEMPORAL COVERAGE:
SPATIAL COVERAGE:
GEOGRAPHIC NAMES:
PLATFORMS:
RESEARCH PROJECT(S):
Discrete measurement;
TEMPORAL COVERAGE:
START DATE: 2006-01-20
END DATE: 2006-01-30
SPATIAL COVERAGE:
NORTH: 35.3
WEST: 125
EAST: 130.9
SOUTH: 26.2
GEOGRAPHIC NAMES:
North Pacific Ocean;East China Sea;Japan Sea;
PLATFORMS:
R/V Mirai (ID: 49NZ);
RESEARCH PROJECT(S):
none;
VARIABLES / PARAMETERS:
| Dissolved Inorganic Carbon | |
|---|---|
| Abbreviation: | TCARBN |
| Unit: | UMOL/KG |
| Observation type: | Discrete, bottle |
| Measured or calculated: | Measured |
| Sampling instrument: | Niskin Bottles |
| Analyzing instrument: | Measurements of DIC were made with two total CO2 measuring systems (systems- and -B; Nippon ANS, Inc.), which are slightly different from each other. The systems comprise of a seawater dispensing system, a CO2 extraction system and a coulometer (Model 5012, UIC Inc.). |
| Detailed sampling and analyzing information: | All seawater samples were collected from depths with 12 liter Niskin bottles basically at every other station. The seawater samples for C(T) were taken with a plastic drawing tube (PFA tubing connected to silicone rubber tubing) into a 300 ml borosilicate glass bottle. The glass bottle was filled with seawater smoothly from the bottom following a rinse with a seawater of 2 full bottle volumes. The glass bottle was closed by a stopper, which was fitted to the bottle mouth gravimetrically without additional force. At a chemical laboratory on the ship, a headspace of approximately 1% of the bottle volume was made by removing seawater with a plastic pipette. A saturated mercuric chloride of 100 μl was added to poison seawater samples. The glass bottles were sealed with a greased (Apiezon M, M and Materials Ltd) ground glass stopper and the clips were secured. The seawater samples were kept at 4°C in a refrigerator until analysis. A few hours just before analysis, the seawater samples were kept at 20°C in a water bath. |
| CRM manufacturer: | Andrew Dickson Laboratory at SIO |
| CRM batch number: | The certified values of C(T) for batches 69 and 72 are 1907.63 and 2091.61 μmol kg^-1, respecticely. During the Leg. 2, the pipette of system-B was replaced. |
| Preservation method: | mercuric chloride solution |
| Uncertainty: | accuracy estimated at 2.0umol/kg |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Method reference: | Johnson, K. M., A. G. Dickson, G. Eischeid, C. Goyet, P. Guenther, R. M. Key, F. J. Millero, D. Purkerson, C. L. Sabine, R. G. Schottle, D. W. R. Wallace, R. J. Wilke and C. D. Winn (1998), Coulometric total carbon dioxide analysis for marine studies: assessment of the quality of total inorganic carbon measurements made during the US Indian Ocean CO2 survey 1994-1996, Mar. Chem., 63, 21-37. |
| Researcher name: | Akihiko Murata |
| Researcher institution: | JAMSTEC |
| Total alkalinity | |
|---|---|
| Abbreviation: | ALKALI |
| Unit: | UMOL/KG |
| Observation type: | Discrete, bottle |
| Measured or calculated: | Measured |
| Sampling instrument: | Niskin Bottles |
| Curve fitting method: | Levenberg-Marquardt nonlinear least-squares fit of full titration |
| Detailed sampling and analyzing information: | The measuring system for A(T) (customized by Nippon ANS, Inc.) comprises of a water dispensing unit, an auto-burette (Metrohm), a pH meter (Thermo Orion) and an auto-sampler (6 ports). They are automatically controlled by a PC. Separate electrodes (Reference electrode: REF201, (Radiometer), Glass pH electrode: pHG201-7 (Radiometer)), or combined electrodes (ROSS 8102BN, Thermo Orion) were used. Seawater of approximately 40 ml is transferred from a sample bottle (borosilicate glass bottle; 130 ml) into a water-jacketed (25°C) pressurized by N2 gas and is introduced into a water-jacketed (25°C) titration cell. Next, a given volume of the titrant is injected into the titration cell. By this, pH of a seawater sample becomes 4.5 - 4.0. The seawater sample mixed with the titrant is stirred for three minutes with a stirring chip. Then a small volume of titrant (~0.1 ml) is injected until pH or e.m.f. reaches a given value. The concentration of the acid titrant is nominally 0.05 M HCl in 0.65 M NaCl. Calculation of A(T) is based on a modified Gran approach. |
| CRM batch number: | CRM, batches 69 and 72, certified value = 2114.42 and 2312.79 μmol kg^(-1), respectively |
| Uncertainty: | The average and standard deviation of absolute values of differences in A(T) analyzed consecutively were 2.1 and 1.9 μmol kg^(-1) (n = 123), 1.9 and 1.5 μmol kg^(-1) (n = 203) and 2.2 and 1.9 μmol kg^(-1) (n = 20) for Leg.1, 2 and 3, respectively. To evaluate the accuracy of measured A(T), we compared vertical profiles of A(T) measured in MR05-05 with A(T) calculated from C(T) and pH measured in MR05-05, and with A(T) measured at a station of other WOCE lines crossing the P3 line. Results for cross station with the WOCE P16 line along 153°W are shown in Figure. 3.6.2. From this figure, it is found that A(T) measured in this cruise were sufficiently accurate. Together with other comparisons, we estimated the accuracy to be 3 - 2 μmol kg^(-1). |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Method reference: | |
| Researcher name: | Akihiko Murata |
| Researcher institution: | JAMSTEC |
| pH | |
|---|---|
| Abbreviation: | PH_TOT |
| pH scale: | Total |
| Observation type: | Discrete, bottle |
| Measured or calculated: | Measured |
| Sampling instrument: | Niskin Bottles |
| Analyzing instrument: | spectrophotometry (pH) |
| Temperature of pH measurement: | 25 Deg C |
| Detailed sampling and analyzing information: | Measurement of pH was made by a pH measuring system (Nippon ANS, Inc.), which Adopts spectrophotometry. The system comprises of a water dispensing unit and a spectrophotometer (Carry 50 Scan, Varian). Seawater is transferred from borosilicate glass bottle (300 ml) to a sample cell in the spectrophotometer. The length and volume of the cell are 8 cm and 13 ml, respectively, and the sample cell was kept at 25.00 +/- 0.05C in a thermostated compartment. First, absorbance of seawater only is measured at three wavelengths (730, 578 and 434 nm). Then an indicator is injected and circulated for about 4 minutes to mix with seawater sufficiently. After the pump is stopped, the absorbance of seawater + indicator is measured at the same wavelengths. |
| At what temperature was pH reported: | at 25C |
| Uncertainty: | The average and standard deviation of absolute values of differences of pH analyzed consecutively were 0.0007 and 0.0012 pH unit (n = 163), 0.0007 and 0.0006 pH unit (n = 255), and 0.0009 and 0.0009 (n = 36) for Leg.1, 2 and 3, respectively. |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Method reference: | Clayton, T.D., and R.H. Byrne, 1993: Spectrophotometric seawater pH measurements: Total hydrogen ion concentration scale calibration of m-cresol purple and at-sea results. Deep-Sea Res., 40, 2315-2329. |
| Researcher name: | Akihiko Murata |
| Researcher institution: | JAMSTEC |
| CTD Temperature | |
|---|---|
| Abbreviation: | CTDTMP |
| Unit: | degrees celcius |
| Observation type: | CTD sensor |
| Sampling instrument: | CTD |
| Analyzing instrument: | CTD |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Researcher name: | Shuichi Watanabe |
| Researcher institution: | JAMSTEC |
| CTD Salinity | |
|---|---|
| Abbreviation: | CTDSAL |
| Observation type: | CTD sensor |
| Sampling instrument: | CTD |
| Analyzing instrument: | CTD |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Researcher name: | Shuichi Watanabe |
| Researcher institution: | JAMSTEC |
| Bottle Salinity | |
|---|---|
| Abbreviation: | SALNTY |
| Observation type: | Bottle, discrete |
| Sampling instrument: | CTD |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Researcher name: | T. Kawano |
| Researcher institution: | JAMSTEC |
| CTD Oxygen | |
|---|---|
| Abbreviation: | CTDOXY |
| Unit: | UMOL/KG |
| Observation type: | CTD sensor |
| Sampling instrument: | CTD |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Researcher name: | Shuichi Watanabe |
| Researcher institution: | JAMSTEC |
| Bottle Oxygen | |
|---|---|
| Abbreviation: | OXYGEN |
| Unit: | UMOL/KG |
| Observation type: | Bottle, discrete |
| Sampling instrument: | CTD |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Researcher name: | Y.Kumamoto |
| Researcher institution: | JAMSTEC |
| Nutrients | |
|---|---|
| Abbreviation: | SILCAT, NITRAT, NITRIT PHSPHT |
| Unit: | UMOL/KG |
| Observation type: | Bottle, discrete |
| Sampling instrument: | CTD |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| Researcher name: | M. Aoyama |
| Researcher institution: | JAMSTEC |
| Chlorofluorocarbons | |
|---|---|
| Abbreviation: | CFCs/SF6 |
| Unit: | PMOL/KG |
| Observation type: | Bottle, discrete |
| Sampling instrument: | CTD |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
| C14, C13 | |
|---|---|
| Abbreviation: | C14/C13 |
| Unit: | /MILLE |
| Observation type: | Bottle, discrete |
| Sampling instrument: | CTD |
| Quality flag convention: | WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value |
PUBLICATIONS DESCRIBING THIS DATASET:
none;
ADDITIONAL INFORMATION:
none;
FUNDING AGENCY:
JAMSTEC
PROJECT TITLE:
Ocean General Circulation Observational Research Program
PROJECT ID:
SUBMITTED BY: Robert M. Key (key@princeton.edu)
SUBMISSION DATE: 2018-09-17
