INVESTIGATORS:
Joseph E. Salisbury 
- University of New Hampshire (UNH)
Antonio Mannino
- US NASA; Goddard Space Flight Center (GSFC)
Christopher W. Hunt
- University of New Hampshire (UNH)
PACKAGE DESCRIPTION: This dataset includes Surface underway, chemical, discrete sample, meteorological, physical and profile data collected from PELICAN in the Coastal Waters of Louisiana, Coastal Waters of Texas and Gulf of Mexico from 2013-09-09 to 2013-09-22. These data include BAROMETRIC PRESSURE, CONDUCTIVITY, DISSOLVED INORGANIC CARBON (DIC), Partial pressure (or fugacity) of carbon dioxide - atmosphere, Partial pressure (or fugacity) of carbon dioxide - water, SALINITY, TOTAL ALKALINITY (TA), WATER TEMPERATURE and pH. The instruments used to collect these data include Alkalinity titrator, CTD, Carbon dioxide (CO2) gas analyzer, Non-dispersive infrared (NDIR) dissolved inorganic carbon (DIC) analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement, bottle and pH sensors.
These data were collected by Antonio Mannino of US NASA; Goddard Space Flight Center and Dr. Joseph Salisbury and Christopher Hunt of University of New Hampshire as part of the Coastal_GOMEX2013_BOT and Coastal_GOMEX2013_UW data set. CDIAC associated the following cruise ID(s) with this data set: 32PE20130909 and GOMEX2013
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: Salisbury, Joseph E.; Hunt, Christopher W.; Mannino, Antonio (2016). Partial pressure (or fugacity) of carbon dioxide, dissolved inorganic carbon, pH, alkalinity, temperature, salinity and other variables collected from Surface underway, discrete sample and profile observations using Alkalinity titrator, CTD and other instruments from PELICAN in the Coastal Waters of Louisiana, Coastal Waters of Texas and Gulf of Mexico from 2013-09-09 to 2013-09-22 (NCEI Accession 0157461). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/9hjg-m865. Accessed [date].
DATA PACKAGES RELATED TO THIS ONE:
none;
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0157461
NCEI DOI: https://doi.org/10.25921/9hjg-m865
EXPOCODE: 32PE20130909;
CRUISE ID: 32PE20130909;
GOMEX2013;
SECTION/LEG: Coastal GoM;
TYPES OF STUDY: Discrete measurement;Profile;Surface underway;TEMPORAL COVERAGE:
START DATE: 2013-09-09
END DATE: 2013-09-22
SPATIAL COVERAGE:
WEST: -94.979
EAST: -89.257049
GEOGRAPHIC NAMES: Gulf of Mexico;
PLATFORMS: R/V Pelican (ID: 32PE);
RV Pelican (ID: 32PE);
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: |
DIC of unfiltered water was determined using an automated analyzer built by Apollo SciTech (Bogart, GA). Immediately after opening the sample bottle, a digital syringe withdrew a small amount of sample (0.5 mL), acidified it with 10 % phosphoric acid and subsequently measured the evolved CO2 with a Li-Cor 6262 non-dispersive infrared gas analyzer (similar to the method described by Cai and Wang 1998). |
| Standardization description: |
Certified seawater reference materials from Dr. A. Dickson were used to determine DIC concentration by preparing a calibration curve covering the range of DIC from 200 to 2000 μmol kg−1 (Dickson et al. 2003), with a resulting precision ranging from 0.05 to 0.5 % (or 0.1-10 μmol kg−1), with an average of ∼0.1 % (2 μmol kg−1). |
| CRM batch number: |
131 136 |
| Total alkalinity |
|---|
| Abbreviation: |
TA |
| Observation type: |
discrete |
| In-situ / Manipulation / Response variable: |
In-situ observation |
| Measured or calculated: |
Measured |
| Type of titration: |
Gran |
| Cell type (open or closed): |
open |
| Curve fitting method: |
AT and pH of unfiltered water were simultaneously measured by the same instrument (Apollo SciTech AS-2), and thus pH and AT measurements are both based on the same pH electrode. The pH electrode used in the AT titration (Orion 3-Star, Thermo Fisher Inc.) was calibrated using three low ionic strength pH buffers certified on the U.S. National Bureau of Standards (NBS) scale to ±0.01, and the initial reading before the addition of acid titrant was taken as the sample pHNBS (pH on the NBS scale, hereafter simply referred to as pH). AT was measured by Gran titration (Gran 1952) with 0.1 N HCl using an automated titrator. This method adds an initial aliquot of acid to the sample in an open cell, generally lowering the sample pHNBS below 3, and then adds subsequent aliquots of titrant until the pHNBS changes linearly with the volume of acid added. The AT endpoint is then obtained from linear regression of the change of pHNBS against the volume of acid added, according to a Gran transformation. |
| Uncertainty: |
Multiple analyses of the Dickson reference material resulted in a calculated precision of this method of about 0.1 % (or ∼±2 μmol kg−1). The accuracy of the AT automated system, also calibrated with multiple batches of the Dickson CRM as discussed above, was ±3-4 μmol kg−1 |
| Method reference: |
DOE (U.S. Department of Energy). 1994. Handbook of Methods for the Analysis of the Various Parameters of the Carbon Dioxide System in Seawater. Version 2.0. ORNL/CDIAC-74. Ed. A. G. Dickson and C. Goyet. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tenn. Gran, G. 1952. Determination of the equivalence point in potentiometric titrations. Part II. Analyst 77: 661-671 Hunt, C.W., J.E. Salisbury and D. Vandemark. (2013) CO2 Input Dynamics and Air-Sea Exchange in a Large New England Estuary. Estuaries and Coasts 37(5): 1078-1091. |
| pH |
|---|
| Abbreviation: |
pH |
| pH scale: |
NBS |
| Observation type: |
discrete |
| In-situ / Manipulation / Response variable: |
In-situ observation |
| Measured or calculated: |
Measured |
| Temperature of pH measurement: |
24.4 |
| Detailed sampling and analyzing information: |
Orion 3-Star, Thermo Fisher Inc. |
| 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 |
| ALKALI |
|---|
| Abbreviation: |
ALKALI |
| Unit: |
UMOL/KG |
| Controlled vocabulary name: |
total alkalinity |
| In-situ / Manipulation / Response variable: |
in-situ |
| PH_NBS |
|---|
| Abbreviation: |
PH_NBS |
| Unit: |
@24.4 Deg C |
| Controlled vocabulary name: |
pH |
| 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 |
| SHIP_DIR |
|---|
| Abbreviation: |
SHIP_DIR |
| Unit: |
DEG |
| In-situ / Manipulation / Response variable: |
in-situ |
| SHIP_SPEED |
|---|
| Abbreviation: |
SHIP_SPEED |
| Unit: |
M/C |
| In-situ / Manipulation / Response variable: |
in-situ |
| SSS |
|---|
| Abbreviation: |
SSS |
| Unit: |
Sea surface salinity |
| Controlled vocabulary name: |
SALINITY |
| In-situ / Manipulation / Response variable: |
in-situ |
| ATM_PRE |
|---|
| Abbreviation: |
ATM_PRE |
| Unit: |
MBAR |
| Controlled vocabulary name: |
BAROMETRIC PRESSURE |
| In-situ / Manipulation / Response variable: |
in-situ |
| FCO2_WAT |
|---|
| Abbreviation: |
FCO2_WAT |
| Unit: |
UATM |
| Controlled vocabulary name: |
partial pressure of carbon dioxide - water |
| In-situ / Manipulation / Response variable: |
in-situ |
| FCO2_AIR |
|---|
| Abbreviation: |
FCO2_AIR |
| Unit: |
UATM |
| Controlled vocabulary name: |
Partial pressure (or fugacity) of carbon dioxide - atmosphere |
| In-situ / Manipulation / Response variable: |
in-situ |
PUBLICATIONS DESCRIBING THIS DATASET: none;
ADDITIONAL INFORMATION: none;
FUNDING AGENCY: NASA NNX13AM38G
PROJECT TITLE:
PROJECT ID:
SUBMITTED BY: Alex Kozyr (Alex.Kozyr@noaa.gov)
SUBMISSION DATE: 2016-12-11
