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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 DELAWARE II in the North Atlantic Ocean and Stellwagen Bank National Marine Sanctuary from 2012-02-02 to 2012-02-19 (NCEI Accession 0157436)

INVESTIGATORS:
Rik Wanninkhof ORCID logo - NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Donald C. Melrose - NMFS/NEFSC/Narragansett Lab
Denis Pierrot ORCID logo - NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Leticia Barbero ORCID logo - NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)

PACKAGE DESCRIPTION: This dataset includes chemical, discrete sample, physical and profile data collected from NOAA Ship DELAWARE II in the North Atlantic Ocean and Stellwagen Bank National Marine Sanctuary from 2012-02-02 to 2012-02-19. 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 Coastal_Delware_II_2012 data set. CDIAC associated the following cruise ID(s) with this data set: DE_1202 The Global Coastal Carbon Data Project data includes the bottle (discrete) and surface (underway) carbon-related measurements from coastal research cruises, the data from time series cruises and coastal moorings. The coastal regions data are very important for the understanding of carbon cycle on the continental margins.

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 DELAWARE II in the North Atlantic Ocean and Stellwagen Bank National Marine Sanctuary from 2012-02-02 to 2012-02-19 (NCEI Accession 0157436). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.coast_delware_316g20120202. Accessed [date].


DATA PACKAGES RELATED TO THIS ONE:
none;
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0157436
NCEI DOI: https://doi.org/10.3334/cdiac/otg.coast_delware_316g20120202
EXPOCODE: 316G20120202;
CRUISE ID: DE_1202;
SECTION/LEG: Coastal Cruise;

TYPES OF STUDY:
Discrete measurement;Profile;

TEMPORAL COVERAGE:
START DATE: 2012-02-02
END DATE: 2012-02-19

SPATIAL COVERAGE:
NORTH: 43.855
WEST: -75.53333
EAST: -65.77333
SOUTH: 35.98833

GEOGRAPHIC NAMES:
Atlantic Ocean;

PLATFORMS:
R/V Delaware II (ID: 316G);

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 112
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: 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 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