INVESTIGATORS:
Kumiko Azetsu-Scott 
- Bedford Institute of Oceanography (BIO)
Igor Yashayaev
- Bedford Institute of Oceanography (BIO)
PACKAGE DESCRIPTION: This dataset includes chemical, discrete sample, physical and profile data collected from HUDSON in the Davis Strait, Labrador Sea and North Atlantic Ocean from 2014-05-02 to 2014-05-24. These data include AMMONIUM (NH4), CHLOROFLUOROCARBON-12 (CFC-12), DISSOLVED INORGANIC CARBON (DIC), DISSOLVED OXYGEN, HYDROSTATIC PRESSURE, NITRATE, NITRITE, SALINITY, SULFUR HEXAFLUORIDE (SF6), TOTAL ALKALINITY (TA), WATER TEMPERATURE, pH, phosphate and silicate. The instruments used to collect these data include Alkalinity titrator, CTD, Coulometer for DIC measurement, bottle and spectrophotometer.
These data were collected by Kumiko Azetsu-Scott and Igor Yashayaev of Bedford Institute of Oceanography as part of the GOSHIP_AR07W_2014 data set. CDIAC associated the following cruise ID(s) with this data set: GOSHIP_AR07W_2014 and HUD2014007
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: Azetsu-Scott, Kumiko; Yashayaev, Igor (2016). Discrete carbon dioxide, hydrographic, and chemical data obtained during the R/V Hudson cruise in the North Atlantic Ocean on GO-SHIP Repeat Section AR07W_2014 from 2014-05-02 to 2014-05-24 (NCEI Accession 0157623). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.goship_ar07w_2014. Accessed [date].
DATA PACKAGES RELATED TO THIS ONE:
none;
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0157623
NCEI DOI: https://doi.org/10.3334/cdiac/otg.goship_ar07w_2014
EXPOCODE: 18HU20140502;
CRUISE ID: GOSHIP_AR07W_2014;
HUD2014007;
SECTION/LEG: GOSHIP_AR07W_2014;
TYPES OF STUDY: Discrete measurement;Profile;TEMPORAL COVERAGE:
START DATE: 2014-05-02
END DATE: 2014-05-24
SPATIAL COVERAGE:
WEST: -63.3268
EAST: -48.229
GEOGRAPHIC NAMES:
Atlantic Ocean;Labrador Sea;
PLATFORMS: R/V Hudson (ID: 18HU);
RESEARCH PROJECT(S):
none;
VARIABLES / PARAMETERS:
| Dissolved Inorganic Carbon |
|---|
| Abbreviation: |
DIC |
| Observation type: |
discrete |
| In-situ / Manipulation / Response variable: |
In-situ observation |
| Measured or calculated: |
Calculated |
| Detailed sampling and analyzing information: |
A total of 780 seawater samples from whole number stations 3-28 on the AR7W and 2-19 on the XHL were collected in 500 mL borosilicate glass bottles and preserved with mercuric chloride following the method described in “Guide to best practises for ocean CO2 measurements”. The samples were subsequently transported back to the Bedford Institute of Oceanography for analysis. TCO2 was later determined on shore using gas extraction and coulometric titration with photometric endpoint detection (Johnson, et al., 1985). |
| CRM batch number: |
Batch 134 |
| Total alkalinity |
|---|
| Abbreviation: |
TA |
| Observation type: |
discrete |
| In-situ / Manipulation / Response variable: |
In-situ observation |
| Measured or calculated: |
Measured |
| Type of titration: |
two-stage open cell acidimetric, potentiometric |
| Curve fitting method: |
A total of 780 seawater samples from whole number stations 3-28 on the AR7W and 2-19 on the XHL were collected in 500 mL borosilicate glass bottles and preserved with mercuric chloride following the method described in “Guide to best practises for ocean CO2 measurements”. The samples were subsequently transported back to the Bedford Institute of Oceanography for analysis. Total alkalinity was measured by open-cell potentiometric titration with full curve Gran Point determination using a Titrando dosimat with Tiamo software in conjunction with a sample delivery system built in- house. |
| pH |
|---|
| Abbreviation: |
pH |
| pH scale: |
total hydrogen ion concentration scale (mol/kg-sw) |
| Observation type: |
discrete |
| In-situ / Manipulation / Response variable: |
In-situ observation |
| Measured or calculated: |
Measured |
| Temperature of pH measurement: |
25 °C |
| Detailed sampling and analyzing information: |
Samples for pH analysis were collected from every depth at Stations 3 - 28 on the AR7W line, and from every depth at stations 2-19 on the XHL. In addition, samples were collected from selected depths at shallow biological stations on the AR7W and Extended Halifax Lines where the SeaBird pH sensor was deployed. Seawater was analysed for pH according to the spectrophotometric method described in “Guide to best practises for ocean CO2 measurements” SOP 6B, edited by Andrew Dickson. Water was collected from the rosette in 60 mL borosilicate glass tubes, allowing each sample to overflow by at least one volume. Racks of tubes were then placed in a water bath held at 25 °C and allowed to thermally equilibrate for 30 minutes. Each sample was then introduced into a water-jacketed 10 cm quartz cell and 30 μL of the indicator dye m-cresol purple added before mixing well. The absorbance of light at the wavelengths 434 and 578 nm was measured with an Agilent photodiode array spectrophotometer and the resulting extinction coefficients at these wavelengths were used to determine the pH of the sample. Measurements were conducted during both night and day shifts and samples were stored in a low temperature incubator at 4 °C until immediately prior to analysis. The maximum time between sampling and analysis was about 4 hours. The sample absorption spectra were not referenced to a Certified Reference Material as in the past due to the current unavailability of these CRMs. A total of 623 pH samples were analysed from the AR7W line and 342 from the Extended Halifax Line. |
| 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 |
| NH4 |
|---|
| Abbreviation: |
NH4 |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
AMMONIUM (NH4) |
| 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 |
| TCARBN |
|---|
| Abbreviation: |
TCARBN |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
DISSOLVED INORGANIC CARBON (DIC) |
| In-situ / Manipulation / Response variable: |
in-situ |
| ALKALI |
|---|
| Abbreviation: |
ALKALI |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
total alkalinity |
| In-situ / Manipulation / Response variable: |
in-situ |
| PH_TOT |
|---|
| Abbreviation: |
PH_TOT |
| Unit: |
total hydrogen ion concentration at 25 °C |
| Controlled vocabulary name: |
pH |
| In-situ / Manipulation / Response variable: |
in-situ |
| PH_TMP |
|---|
| Abbreviation: |
PH_TMP |
| Unit: |
DEG_C |
| Controlled vocabulary name: |
pH |
| In-situ / Manipulation / Response variable: |
in-situ |
PUBLICATIONS DESCRIBING THIS DATASET: none;
ADDITIONAL INFORMATION: none;
FUNDING AGENCY:
SUBMITTED BY: Robert M. Key (key@princeton.edu)
SUBMISSION DATE: 2016-12-21
REVISION DATE: 2018-03-06
PREVIOUS VERSIONS: Version 1.1
