Dataset: Isotopes
Deployment: HLY1202

Isotopes

Principal Investigator:

Dr Bogdan Onac (University of South Florida, USF)

Dr Jonathan Wynn (University of South Florida, USF)

Co-Principal Investigator:

Dr Lisa Robbins (United States Geological Survey, USGS)

Contact:

Dr Lisa Robbins (United States Geological Survey, USGS)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Ocean Acidification in the Canada Basin: Roles of Sea Ice (OA - Canada Basin)

Current State:

Preliminary and in progress

Version:

09 September 2014

Version Date:

2014-09-09

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/527906/data

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Description

USGS Arctic Ocean Carbon Cruise 2012: Stable isotope Data
Stable isotope data for seawater samples from the HLY 2012 cruise

For aditional information see:
HLY1202 Cruise Report, Appendix E
U.S. Geological Survey Data Series 862 - Methods
USFSI Stable Isotope Lab

Methods & Sampling

Dataset acquisition description

Isotope Analyses

Seawater samples were collected for stable isotopic analysis by rinsing, then filling 125-mL bottles such that no headspace remained. Samples were fixed with 50 microliters (µL) of saturated mercuric chloride, and sealed with Teflon crimp caps containing a thin coating of Apiezon grease. Samples were refrigerated during storage prior to analysis. Analyses were completed at the University of South Florida Department of Geology Stable Isotope Laboratory using a Thermo-Finnigan Delta V 3 kiloelectron (keV) Isotope Ratio Mass Spectrometer coupled to a GasBench II preparation device. Analyses of d18O of H2O was completed by equilibrating 200 µL of sample with approximately 12 mL headspace of H2 in septum-capped vials. After equlibration, the isotopic composition of the headspace gas was measured (methods following Epstein and Mayeda, 1953; Prosser and Scrimgeour, 1995). Analyses of δ13C of dissolved inorganic carbon (DIC) was completed by injecting 1 mL of sample into an approximately 12-mL vial that was pre-flushed with He and pre-filled with 1 mL of 85 percent H3PO4 (methods following Assayag and others, 2006). The CO2 produced by this acid-stripping of the DIC was then measured after 24 h of equilibration. All stable isotope data are expressed in the conventional delta (d) notation:

Δ = [(Rsample-Rstandard)/Rstandard] × 1000‰

where Rsample and Rstandard is the 18O/16O ratio of the sample and standard, respectively, for d18O. The standard used as a reference for the d scale is VSMOW for H2O. Internal standards were used in the calibration to the VSMOW scale (VEEN and HTAMP waters with d18O = -13.17 per mil (‰) and +15.05‰) and PDB scale Carrara Marble and NBS-18 calcite). Analytical precision on these standards was better than 0.15‰ for d18O and 0.2‰ for d13C.

For aditional information see:
HLY1202 Cruise Report, Appendix E
U.S. Geological Survey Data Series 862 - Methods
USFSI Stable Isotope Lab

Data Processing Description

Dataset Processing Description

Isotope Analyses

Δ = [(Rsample-Rstandard)/Rstandard] × 1000‰

The QA/QC process compared analysis results with calibrated reference standards

For aditional information see:
HLY1202 Cruise Report, Appendix E
U.S. Geological Survey Data Series 862 - Methods
USFSI Stable Isotope Lab

BCO-DMO Processing Notes
- Generated from original file: "HLY1202_Isotopes.csv" contributed by Lisa Robbins
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name
- Date reformatted from MM/DD/YYYY to YYYYMMDD
- Time reformatted from HH:MM to HHMM
- "nd" (no data) inserted into blank fields

More information about this dataset deployment

Funding

Award Number	Funding Source
PLR-1220032	NSF Arctic Sciences

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name: CTD SBE 911plus

Supplied Description:

Discrete samples from vertical profile casts were collected at 4 locations. A 24-bottle Niskin rosette (12-L bottle volume) with an electronic trigger was fitted with a Sea-Bird SBE 911plus CTD and altimeter.

Instrument Type

Generic Name: CTD Sea-Bird SBE 911plus

Acronym: CTD SBE 911plus

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/

Generic Description:

The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

Niskin bottle

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Pump - Surface Underway Ship Intake

Supplied Name: pump-ship intake

Supplied Description:

Samples were numbered incrementally throughout the duration cruises. A "surface" prefix indicates a sample taken from the ship's flow-through system.

Instrument Type

Generic Name: Pump - Surface Underway Ship Intake

Acronym: Pump-Ship Intake

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/31/

Generic Description:

The 'Pump-underway ship intake' system indicates that samples are from the ship's clean water intake pump. This is essentially a surface water sample from a source of uncontaminated near-surface (commonly 3 to 7 m) seawater that can be pumped continuously to shipboard laboratories on research vessels. There is typically a temperature sensor near the intake (known as the hull temperature) to provide measurements that are as close as possible to the ambient water temperature. The flow from the supply is typically directed through continuously logged sensors such as a thermosalinograph and a fluorometer. Water samples are often collected from the underway supply that may also be referred to as the non-toxic supply. Ideally the data contributor has specified the depth in the ship's hull at which the pump is mounted.

Spectrophotometer

Supplied Name: Thermo-Finnigan Delta V 3 kiloelectron (keV) Isotope Ratio Mass Spectrometer

Supplied Description:

Analyses were completed at the University of South Florida Department of Geology Stable Isotope Laboratory using a Thermo-Finnigan Delta V 3 kiloelectron (keV) Isotope Ratio Mass Spectrometer coupled to a GasBench II preparation device

Instrument Type

Generic Name: Spectrophotometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Sample_ID	Sample identification number. Duplicate samples identified by additional letter qualifier.	text	sample
Bottle_ID	Used to identify rosette bottles from CTD station casts. Deepest bottle is 1. Shallowest bottle is 24.	dimensionless	bottle
Latitude	Latitude (South is negative); WGS 84	decimal degrees	lat
Longitude	Longitude (West is negative); WGS 84	decimal degrees	lon
Depth	Depth at which sample was taken. Zero (0) indicates surface sample	meters	depth
d18O	Ratio of Oxygen-18 to Oxygen-16 as compared to VSMOW standard in per mil (parts per thousand).	Per mil (parts per thousand)	d18O_NO3
d13C	Ratio of Carbon-13 to Carbon-12 as compared to VPDB standard in per mil (parts per thousand).	Per mil (parts per thousand)	d13C_DIC

Database

Contribute Data

Dataset: Isotopes
Deployment: HLY1202

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: IsotopesDeployment: HLY1202

Dataset acquisition description

Dataset Processing Description

Dataset: Isotopes
Deployment: HLY1202