INVESTIGATORS:
Richard A. Feely 
- NOAA Pacific Marine Environmental Laboratory (PMEL)
Frank J. Millero
- Rosenstiel School of Marine and Atmospheric Science (RSMAS)
Christopher L. Sabine
- NOAA Pacific Marine Environmental Laboratory (PMEL)
PACKAGE DESCRIPTION: This dataset includes discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity, pH on sea water scale, temperature, salinity, dissolved oxygen, nutrients, chlorofluorocarbons (CFC-11, CFC-12, CFC113), dissolved organic carbon (DOC), tritium and helium obtained during the R/V Roger Revelle cruise CD139, CLIVAR I09N_2007 (EXPOCODE 33RR20070322) in the Indian Ocean from 2007-03-22 to 2007-05-01. These data were collected by Frank J. Millero of Rosenstiel School of Marine and Atmospheric Science and Richard A. Feely and Christopher Sabine of US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory as part of the CLIVAR I09N_2007 data set. The International CLIVAR Global Ocean Carbon and Repeat Hydrography Program carries out a systematic and global re-occupation of select WOCE/JGOFS hydrographic sections to quantify changes in storage and transport of heat, fresh water, carbon dioxide (CO2), and related parameters.
CITE AS: Feely, Richard A.; Sabine, Christopher L.; Millero, Frank J.; Wanninkhof, Rik; Hansell, Dennis A. (2013). Dissolved inorganic carbon (DIC), total alkalinity, pH on sea water scale, temperature, salinity and other variables collected from discrete sample and profile observations during the R/V Roger Revelle cruise CD139, CLIVAR I09N_2007 (EXPOCODE 33RR20070322) in the Indian Ocean from 2007-03-22 to 2007-05-01 (NCEI Accession 0110791). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.clivar_i09n_2007. Accessed [date].
DATA PACKAGES RELATED TO THIS ONE:
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0110791
NCEI DOI: https://doi.org/10.3334/cdiac/otg.clivar_i09n_2007
EXPOCODE: 33RR20070322;
CRUISE ID: CLIVAR I09N_2007;
SECTION/LEG: CLIVAR I09N;
TYPES OF STUDY: Discrete measurement;Profile;TEMPORAL COVERAGE:
START DATE: 2007-03-22
END DATE: 2007-05-01
SPATIAL COVERAGE:
WEST: 85.6573
EAST: 95.0145
GEOGRAPHIC NAMES: Indian 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 |
| In-situ / Manipulation / Response variable: |
In-situ observation |
| Measured or calculated: |
Calculated |
| Detailed sampling and analyzing information: |
Samples for TCO2 measurements were drawn according to procedures outlined in the Handbook of Methods for CO2 Analysis (DOE 1994) from 10.4-L Niskin bottles (except Niskin 34, 9.6 L) into cleaned 300-mL glass bottles. Bottles were rinsed and filled from the bottom, leaving 6 mL of headspace; care was taken not to entrain any bubbles. After 0.12 mL of 50% saturated HgCl2 solution was added as a preservative, the sample bottles were sealed with glass stoppers lightly covered with Apiezon-L grease and were stored at room temperature for a maximum of 12 hours prior to analysis. TCO2 samples were collected at every degree from 36 depths with three replicate samples. Some samples were also collected at every half-degree. The replicate seawater samples were taken from the surface, 1000 m, and bottom Niskin bottles and run at different times during the cell. No systematic difference between the replicates was observed. A total of 2526 samples for TCO2 were collected and analyzed during the cruise. The TCO2 analytical equipment was set up in a seagoing laboratory van. The analysis was done by coulometry with two analytical systems (PMEL1 and PMEL2) used simultaneously on the cruise. Each system consisted of a coulometer (UIC, Inc.) coupled with a single operator multi-parameter metabolic analyzer (SOMMA) inlet system developed by Kenneth Johnson (Johnson et al. 1985, 1987, 1993, and 1999; Johnson 1992) now retired from Brookhaven National Laboratory (BNL). In the coulometric analysis of TCO2, all carbonate species are converted to CO2 (gas) by addition of excess hydrogen ion (acid) to the seawater sample, and the evolved CO2 gas is swept into the titration cell of the coulometer with pure air or compressed nitrogen, where it reacts quantitatively with a proprietary reagent based on ethanolamine to generate hydrogen ions. In this process, the solution changes from blue to colorless, which triggers a current through the cell and causes coulometrical generation of OH- ions at the anode. The OH- ions react with the H+, and the solution turns blue again. A beam of light is shone through the solution, and a photometric detector at the opposite side of the cell senses the change in transmission. Once the percent transmission reaches its original value, the coulometric titration is stopped, and the amount of CO2 that enters the cell is determined by integrating the total charge during the titration. |
| Standardization description: |
The coulometers were calibrated by injecting aliquots of pure CO2 (99.995%) by means of an 8-port valve outfitted with two sample loops with known gas volumes bracketing the amount of CO2 extracted from the water samples for the two PMEL systems. |
| CRM batch number: |
CRM No 78 |
| Total alkalinity |
|---|
| Abbreviation: |
ALKALI |
| Unit: |
UMOL/KG |
| Observation type: |
discrete |
| In-situ / Manipulation / Response variable: |
In-situ observation |
| Measured or calculated: |
Measured |
| Cell type (open or closed): |
Close cell |
| Curve fitting method: |
Levenberg-Marquart |
| Uncertainty: |
accuracy: 0.49 +/4.7 precision: -1.0 +/- 2.6 |
| pH |
|---|
| Abbreviation: |
PH_SWS |
| pH scale: |
seawater scale |
| Observation type: |
discrete |
| In-situ / Manipulation / Response variable: |
In-situ observation |
| Measured or calculated: |
Measured |
| Temperature of pH measurement: |
25 deg C |
| Detailed sampling and analyzing information: |
HP 8453 spectrophotometer |
| Uncertainty: |
sigma = 0.003 |
| 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 |
| CFC12 |
|---|
| Abbreviation: |
CFC12 |
| Unit: |
PMOL/KG |
| Controlled vocabulary name: |
CHLOROFLUOROCARBON-12 (CFC-12) |
| In-situ / Manipulation / Response variable: |
in-situ |
| CFC113 |
|---|
| Abbreviation: |
CFC113 |
| Unit: |
PMOL/KG |
| Controlled vocabulary name: |
CHLOROFLUOROCARBON-113 (CFC-113) |
| In-situ / Manipulation / Response variable: |
in-situ |
| DOC |
|---|
| Abbreviation: |
DOC |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
DISSOLVED ORGANIC CARBON |
| In-situ / Manipulation / Response variable: |
in-situ |
| TDN |
|---|
| Abbreviation: |
TDN |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
Total Dissolved Nitrogen (TDN) |
| In-situ / Manipulation / Response variable: |
in-situ |
| TRITUM |
|---|
| Abbreviation: |
TRITUM |
| Unit: |
TU |
| Controlled vocabulary name: |
Tritium (Hydrogen isotope) |
| In-situ / Manipulation / Response variable: |
in-situ |
| TRITER |
|---|
| Abbreviation: |
TRITER |
| Unit: |
TU |
| In-situ / Manipulation / Response variable: |
in-situ |
| HELIUM |
|---|
| Abbreviation: |
HELIUM |
| Unit: |
NMOL/KG |
| Controlled vocabulary name: |
HELIUM |
| In-situ / Manipulation / Response variable: |
in-situ |
PUBLICATIONS DESCRIBING THIS DATASET: none;
ADDITIONAL INFORMATION: none;
FUNDING AGENCY:
SUBMITTED BY: Alex Kozyr (Alex.Kozyr@noaa.gov)
SUBMISSION DATE: 2013-07-19
REVISION DATE: 2016-02-23
PREVIOUS VERSIONS: Version 1.1
