INVESTIGATORS:
Rik Wanninkhof
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Donald C. Melrose
- NMFS/NEFSC/Narragansett Lab
Denis Pierrot
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Leticia Barbero
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
PACKAGE DESCRIPTION: This dataset includes chemical, discrete sample, physical and profile data collected from NOAA Ship GORDON GUNTER in the North Atlantic Ocean and Stellwagen Bank National Marine Sanctuary from 2014-03-01 to 2014-03-08. These data include AMMONIUM (NH4), DISSOLVED INORGANIC CARBON (DIC), DISSOLVED OXYGEN, HYDROSTATIC PRESSURE, NITRATE, SALINITY, SIGMA-THETA, TOTAL ALKALINITY (TA), WATER TEMPERATURE, pH, phosphate and silicate. The instruments used to collect these data include CTD and bottle.
These data were collected by Donald Christopher Melrose of US DOC; NOAA; NMFS; Northeast Fisheries Science Center and Rik Wanninkhof, Leticia Barbero and Denis Pierrot of NOAA Atlantic Oceanographic and Meteorological Laboratory as part of the Gordon_Gunter_Coastal_Cruises_2014 data set. CDIAC associated the following cruise ID(s) with this data set: GU_1401
CITE AS: Wanninkhof, Rik; Barbero, Leticia; Pierrot, Denis; Prezioso, Jerry; Melrose, Donald C.; Townsend, David W.; Thomas, Maura A. (2016). Dissolved inorganic carbon, pH, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from NOAA Ship GORDON GUNTER in the North Atlantic Ocean and Stellwagen Bank National Marine Sanctuary from 2014-03-01 to 2014-03-08 (NCEI Accession 0157464). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.coast_gu2014bt. Accessed [date].
DATA PACKAGES RELATED TO THIS ONE:
none;
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0157464
NCEI DOI: https://doi.org/10.3334/cdiac/otg.coast_gu2014bt
EXPOCODE: 33GG20140301;
CRUISE ID: GU_1401;
SECTION/LEG: Coastal Cruise;
TYPES OF STUDY: Discrete measurement;Profile;TEMPORAL COVERAGE:
START DATE: 2014-03-01
END DATE: 2014-03-08
SPATIAL COVERAGE:
WEST: -70.62667
EAST: -65.435
GEOGRAPHIC NAMES: Atlantic Ocean;
PLATFORMS: R/V Gordon Gunter (ID: 33GG);
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 |
Replicate information: |
Reproducibility: (# samples and average difference): 15 sets of duplicate samples, average difference 2.39 μmol/kg, average STDEV of 1.69 (0.09-3.37); 29 sets of duplicates from same depth different Niskin bottles, average difference 2.18 μmol/kg, average STDEV of 1.54 (0.10-9.61); 4 sets of triplicates from same depth different Niskin bottles, average difference 2.99 μmol/kg, average STDEV 2.99 (2.19-3.99). |
Standardization description: |
The coulometers were calibrated by injecting aliquots of pure CO2 (99.99%) 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 AOML systems. |
CRM batch number: |
Batch 129 |
Total alkalinity |
Abbreviation: |
TA |
Observation type: |
discrete |
In-situ / Manipulation / Response variable: |
In-situ observation |
Measured or calculated: |
Measured |
Type of titration: |
Full Titration |
Cell type (open or closed): |
Open |
Curve fitting method: |
Least-Square Analysis. Semi-automatic titration systems, System 1 consists of a Metrohm 765 Dosimat titrator, a pH meter (Orion 720A, ThermoScientific), a ROSS half cell pH glass electrode (Orion 9101BN, ThermoScientific) and a reference electrode (Orion 900200, ThermoScientific). System 2 consists of a Metrohm 665 Dosimat titrator, a pH meter (Orion 2 star pH Benchtop, ThermoScientific), a ROSS half cell pH glass electrode (Orion 9101BN, ThermoScientific) and a reference electrode (Orion 900200, ThermoScientific). |
Uncertainty: |
The precision of this method is better than 0.1% and accuracy is 0.1%. |
Method reference: |
Millero, F. J., Zhang, J. Z., Lee, K., and Campbell, D. M. (1993). Titration alkalinity of seawater. Marine Chemistry, 44(2), 153-165. |
pH |
Abbreviation: |
pH |
pH scale: |
Total Scale |
Observation type: |
discrete |
In-situ / Manipulation / Response variable: |
In-situ observation |
Measured or calculated: |
Measured |
Temperature of pH measurement: |
20 ºC |
Detailed sampling and analyzing information: |
The same sample bottle was used for pH, DIC and Talk analyses, with pH being analyzed first. The samples were fixed with HgCl2 (refer to DIC for more information on sampling and storage). Samples were thermostated at 20 (+/- 0.05) degrees Celsius in a water bath. Approximately 80 ml of sample were extracted from each DIC sample bottle by syringe before DIC analysis to determine the pH. Temperature for each sample was measured before analysis using a Hart Scientific Fluke 1523 reference thermometer. Absorbance blanks were taken for each sample and 10 micro liter of purified m-cresol purple (10 mmol kg-1) were added for the analysis. The equations of Liu et al, 2011 formulated using the purified m-cresol purple indicator were used to determine pH of the samples. pH samples were analyzed at 20C. Please check accompanying readme file for additional details. |
Uncertainty: |
Please check attached pdf for more details |
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 |
CTDOXY |
Abbreviation: |
CTDOXY |
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 |
NITRATE |
Abbreviation: |
NITRATE |
Unit: |
UMOL/KG |
Controlled vocabulary name: |
NITRATE |
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 |
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: |
@20C |
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 |
SIGMA_THETA |
Abbreviation: |
SIGMA_THETA |
Unit: |
KG/M^3 |
Controlled vocabulary name: |
SIGMA-THETA |
In-situ / Manipulation / Response variable: |
in-situ |
PUBLICATIONS DESCRIBING THIS DATASET: none;
ADDITIONAL INFORMATION: none;
FUNDING AGENCY: NOAA Ocean Acidification Program (OAP)
PROJECT TITLE:
PROJECT ID:
SUBMITTED BY: Alex Kozyr (Alex.Kozyr@noaa.gov)
SUBMISSION DATE: 2016-12-11