INVESTIGATORS:
Alison M. Macdonald
- Woods Hole Oceanographic Institution (WHOI)
Rik Wanninkhof 
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Craig A. Carlson
- University of California - Santa Barbara (UCSB)
Andrew G. Dickson
- Scripps Institution of Oceanography (SIO)
PACKAGE DESCRIPTION: This dataset includes discrete profile measurements of dissolved inorganic carbon, total alkalinity, pH (on total scale), temperature, salinity, oxygen, nutrients, chlorofluorocarbons and other chemical measurements during R/V Roger Revelle Repeat Hydrography and SOCCOM Cruise in the Southern and Indian Oceans: GO-SHIP Section I08S (EXPOCODE 33RR20160208), from 2016-02-08 to 2016-03-16. The instruments used to collect these data include CTD and Niskin bottle. These data were measured by Dr. Rik Wanninkhof of NOAA Atlantic Oceanographic and Meteorological Laboratory, Dr. Andrew Dickson of University of California - San Diego; Scripps Institution of Oceanography and Craig A. Carlson of University of California - Santa Barbara.
CITE AS: Macdonald, Alison M.; Wanninkhof, Rik; Dickson, Andrew G.; Carlson, Craig A.; Key, Robert M.; Becker, Susan; Swift, James H.; McNichol, Ann; Schlosser, Peter; Fripiat, François (2018). Discrete profile measurements of dissolved inorganic carbon, total alkalinity, pH and other hydrographic and chemical data obtained during R/V Roger Revelle Repeat Hydrography and SOCCOM Cruise in the Indian Ocean and Southern Ocean: GO-SHIP Section I08S (EXPOCODE 33RR20160208), from 2016-02-08 to 2016-03-16 (NCEI Accession 0171457). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5hm56qr. Accessed [date].
DATA PACKAGES RELATED TO THIS ONE:
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0171457
NCEI DOI: https://doi.org/10.7289/v5hm56qr
EXPOCODE: 33RR20160208;
CRUISE ID: SOCCOM;
SECTION/LEG: I08S;
TYPES OF STUDY: Discrete measurement;Profile;TEMPORAL COVERAGE:
START DATE: 2016-02-08
END DATE: 2016-03-16
SPATIAL COVERAGE:
GEOGRAPHIC NAMES:
Indian Ocean;Southern Ocean;
PLATFORMS: R/V Roger Revelle (ID: 33RR);
RESEARCH PROJECT(S):
none;
VARIABLES / PARAMETERS:
| Dissolved Inorganic Carbon |
|---|
| Abbreviation: |
TCARBN |
| Unit: |
UMOL/KG |
| Observation type: |
discrete |
| Measured or calculated: |
Measured |
| Sampling instrument: |
Niskin Bottles |
| Analyzing instrument: |
SOMA |
| Detailed sampling and analyzing information: |
The two DICE systems (AOML 3 and AOML 4) were set up in a seagoing container modified for use as a shipboard laboratory on the aft main working deck of the R/V Roger Revelle. |
| Replicate information: |
568 replicate sample analysis made. Average difference from the mean was 0.70. No systematic differences between the replicates were observed. DICE 1: 0.64 DICE 2: 0.75 |
| Standardization description: |
The stability of each coulometer cell solution was confirmed three different ways. 1) Gas loops were run at the beginning and end of each cell; 2) CRM’s supplied by Dr. A. Dickson of SIO, were measured near the beginning; and 3) Duplicate samples were typically run throughout the life of the cell solution. Each coulometer was calibrated by injecting aliquots of pure CO2 (99.999%) by means of an 8-port valve (Wilke et al., 1993) outfitted with two calibrated sample loops of different sizes (~1ml and ~2ml). The instruments were each separately calibrated at the beginning of each cell with a minimum of two sets of these gas loop injections and then again at the end of each cell to ensure no drift during the life of the cell. These standard loops were consistent throughout the cruise. |
| CRM batch number: |
152: Certified Value = 2020.88 µmol/kg |
| Preservation method: |
0.16 ml of saturated HgCl2 used for sample preservation |
| Preservative correction: |
he sample bottles was 288 ml (calibrated by Esa Peltola, AOML). |
| Uncertainty: |
Approximately 12% of the niskins sampled were duplicates taken as a check of our precision. These replicate samples were interspersed through- out the station analysis for quality assurance and integrity of the coulometer cell solutions. The average absolute difference from the mean of these replicates is 1.51 μmol/kg - No major systematic differences between the replicates were observed. The accuracy of the DICE measurement is determined with the use of standards (Certified Reference Materials (CRMs), consisting of filtered and UV irradiated seawater) supplied by Dr. A. Dickson of Scripps Institution of Oceanography (SIO). The CRM accuracy is determined manometrically on land in San Diego and the DIC data re- ported to the data base have been corrected to this batch 152 CRM value. The CRM certified value for this batch is 2020.88 μmol/kg1. |
| Method reference: |
Johnson, K.M., A.E. King, and J. McN. Sieburth (1985): “Coulometric DIC analyses for marine studies: An introduction.” Mar. Chem., 16, 61-82. |
| Researcher name: |
Rik Wanninkhof |
| Researcher institution: |
NOAA/AOML |
| Total alkalinity |
|---|
| Abbreviation: |
ALKALI |
| Unit: |
UMOL/KG |
| Observation type: |
discrete |
| Measured or calculated: |
Measured |
| Type of titration: |
two-stage open cell acidimetric, potentiometric |
| Cell type (open or closed): |
open cell titration |
| Detailed sampling and analyzing information: |
Samples are analyzed using an open cell titration procedure using two 250 mL jacketed cells. One sample is un- dergoing titration while the second is being prepared and equilibrating to 20°C for analysis. After an initial aliquot of approximately 2.3-2.4 mL of standardized hydrochloric acid (~0.1M HCl in ~0.6M NaCl solution), the sample is stirred for 5 minutes while air is bubbled into it at a rate of 200 scc/m to remove any liberated carbon dioxide gas. A Metrohm 876 Dosimat Plus is used for all standardized hydrochloric acid additions. After equilibration, ~19 aliquots of 0.04 ml are added. Between the pH range of 3.5 to 3.0, the progress of the titration is monitored using a pH glass electrode/reference electrode cell, and the total alkalinity is computed from the titrant volume and e.m.f. measure- ments using a non-linear least-squares approach ([Dickson2007]). An Agilent 34970A Data Acquisition/Switch Unit with a 34901A multiplexer is used to read the voltage measurements from the electrode and monitor the temperatures from th |
| CRM manufacturer: |
Dickson laboratory Certified Reference Material (CRM) |
| CRM batch number: |
Batch 152 |
| TA blank correction: |
N/A |
| Uncertainty: |
A total of 138 Niskin bottles were sampled for duplicate measurements and gave an average difference of 0.01 +/- 1.01 umol kg-1. |
| Method reference: |
Dickson, Andrew G., Chris Sabine and James R. Christian, editors, "Guide to Best Practices for Ocean CO2 Measurements", Pices Special Publication 3, IOCCP Report No. 8, October 2007, SOP 3b, "Determination of total alkalinity in sea water using an open-cell titration" |
| Researcher name: |
Andrew Dickson |
| Researcher institution: |
SIO |
| pH |
|---|
| Abbreviation: |
PH_TOT |
| pH scale: |
total hydrogen ion concentration scale (mol/kg-sw) |
| Observation type: |
discrete |
| Measured or calculated: |
Measured |
| Sampling instrument: |
Niskin Bottles |
| Temperature of pH measurement: |
25 °C |
| Detailed sampling and analyzing information: |
spectrophotometric determination using purified meta-cresol purple indicator dye |
| Researcher name: |
Andrew Dickson |
| Researcher institution: |
SIO |
| PH_TMP |
|---|
| Abbreviation: |
PH_TMP |
| Unit: |
DEG_C |
| Controlled vocabulary name: |
pH |
| In-situ / Manipulation / Response variable: |
in-situ |
| CTDTMP |
|---|
| Abbreviation: |
CTDTMP |
| Unit: |
DEG_C |
| Controlled vocabulary name: |
WATER TEMPERATURE |
| In-situ / Manipulation / Response variable: |
in-situ |
| CTDSAL |
|---|
| Abbreviation: |
CTDSAL |
| Controlled vocabulary name: |
SALINITY |
| In-situ / Manipulation / Response variable: |
in-situ |
| SALNTY |
|---|
| Abbreviation: |
SALNTY |
| Controlled vocabulary name: |
SALINITY |
| In-situ / Manipulation / Response variable: |
in-situ |
| CTDOXY |
|---|
| Abbreviation: |
CTDOXY |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
DISSOLVED OXYGEN |
| In-situ / Manipulation / Response variable: |
in-situ |
| OXYGEN |
|---|
| Abbreviation: |
OXYGEN |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
DISSOLVED OXYGEN |
| In-situ / Manipulation / Response variable: |
in-situ |
| SILCAT |
|---|
| Abbreviation: |
SILCAT |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
silicate |
| In-situ / Manipulation / Response variable: |
in-situ |
| NITRAT |
|---|
| Abbreviation: |
NITRAT |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
NITRATE |
| In-situ / Manipulation / Response variable: |
in-situ |
| NITRIT |
|---|
| Abbreviation: |
NITRIT |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
NITRITE |
| In-situ / Manipulation / Response variable: |
in-situ |
| PHSPHT |
|---|
| Abbreviation: |
PHSPHT |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
phosphate |
| In-situ / Manipulation / Response variable: |
in-situ |
| CFC-11 |
|---|
| Abbreviation: |
CFC-11 |
| Unit: |
PMOL/KG |
| Controlled vocabulary name: |
CHLOROFLUOROCARBON-11 (CFC-11) |
| In-situ / Manipulation / Response variable: |
in-situ |
| CFC-12 |
|---|
| Abbreviation: |
CFC-12 |
| Unit: |
PMOL/KG |
| Controlled vocabulary name: |
CHLOROFLUOROCARBON-12 (CFC-12) |
| In-situ / Manipulation / Response variable: |
in-situ |
| SF6 |
|---|
| Abbreviation: |
SF6 |
| Unit: |
FMOL/KG |
| Controlled vocabulary name: |
Sulfur Hexaflouride (SF6) |
| In-situ / Manipulation / Response variable: |
in-situ |
| Dissolved Organic Carbon |
|---|
| Abbreviation: |
DOC |
| Unit: |
UMOL/KG |
| Observation type: |
Discrete |
| In-situ / Manipulation / Response variable: |
in-situ |
| Total Dissolved Nitrogen |
|---|
| Abbreviation: |
TDN |
| Unit: |
UMOL/KG |
| Observation type: |
Discrete |
| In-situ / Manipulation / Response variable: |
in-situ |
| Delta C14 |
|---|
| Abbreviation: |
DELC14 |
| Unit: |
/MILLE |
| Observation type: |
Discrete |
| In-situ / Manipulation / Response variable: |
in-situ |
| Delta C14 |
|---|
| Abbreviation: |
DELC14 |
| Unit: |
/MILLE |
| Observation type: |
Discrete |
| In-situ / Manipulation / Response variable: |
in-situ |
| Delta C13 |
|---|
| Abbreviation: |
DELC13 |
| Unit: |
/MILLE |
| Observation type: |
Discrete |
| In-situ / Manipulation / Response variable: |
in-situ |
| CHLORA |
|---|
| Abbreviation: |
CHLORA |
| Unit: |
UG/KG |
| Observation type: |
Discrete |
| In-situ / Manipulation / Response variable: |
in-situ |
PUBLICATIONS DESCRIBING THIS DATASET: Johnson, K.M., A.E. King, and J. McN. Sieburth (1985): “Coulometric DIC analyses for marine studies: An introduction.” Mar. Chem., 16, 61-82.
ADDITIONAL INFORMATION: none;
FUNDING AGENCY: NOAA, NSF
PROJECT TITLE:
GO-SHIP Program
PROJECT ID:
SUBMITTED BY: Robert M. Key (key@princeton.edu)
SUBMISSION DATE: 2018-02-28
REVISION DATE: 2021-03-26
PREVIOUS VERSIONS: Version 1.1Version 2.2Version 3.3
