Dataset: Noble gas observations and model runs
Deployment: Nicholson_lab

Noble gas observations for ECCO model and Matlab files

Principal Investigator:

David P. Nicholson (Woods Hole Oceanographic Institution, WHOI)

Co-Principal Investigator:

Samar Khatiwala (University of Oxford, Oxford)

Rachel Stanley (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

An Inverse and Forward Global Modeling Synthesis of Noble Gases to Better Quantify Biogeochemical Cycles (Noble gas modeling)

Version:

Data URL:

https://www.bco-dmo.org/dataset-deployment/675587/data

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Description

This dataset includes:
1) noble gas observations used in the ECCO noble gas model. They were collected globally at sea and were analyzed by mass spectrometry.
(2) model simulations decomposed to isolate bubble-mediated gas exchange.

Noble Gas Observations:
The observation data is provided in MATLAB format: noblegasDB.mat (download here) (size = 94 KB)
The variables are a MATLAB table ‘NGall’ and a list of original references ‘NGprojects’
The served data is provided in jgofs format with the columns slightly rearranged for database best practices.

Global Model Simulations:

The simulation file is provided in MATLAB format: ECCOv2_NobleGases.mat (download here) (size = 1 GB)

Noble gases and nitrogen were simulated in the Estimating the Circulation & Climate of the Ocean (ECCO) global ocean state estimate utilizing a matrix-free Newton–Krylov (MFNK) scheme to efficiently compute the periodic seasonal solutions for noble gas tracers.

Original simulations:
sim1 = diffusive gas exchange only
sim2 = diffusive gas exchange and bubble injection
sim3 = diffusive gas exchange and bubble exchange

DG = sim1
IG = sim2-sim1
EG = sim3-sim1

For each gas ‘G’ total gas concentration is calculated as Gsol(S,T) * (AG + BG + CG)

DG is results of the simulation with no bubbles, while IG and EG are the isolated contribution from bubble injection and bubble exchange, respectively.

Methods & Sampling

Dataset acquisition description

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1129644	NSF Division of Ocean Sciences

Instruments

Isotope-ratio Mass Spectrometer

Supplied Name: isotope ratio mass spectrometer (Finnigan MAT 251 or Delta XL at UW, MAT 253 at UVic)

Supplied Description:

Used for Hamme & Emerson (2013) gas measurements

Instrument Type

Generic Name: Isotope-ratio Mass Spectrometer

Acronym: IR Mass Spec; IRMS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).

Mass Spectrometer

Supplied Name: Hiden Quadrupole Mass Spectrometer (QMS)

Supplied Description:

Used by Stanley et al (2009) to measure noble gasses.

Instrument Type

Generic Name: Mass Spectrometer

Acronym: Mass Spec

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
lon	longitude; east is positive	decimal degrees	lon
lat	latitude; north is positive	decimal degrees	lat
depth	sample depth	meters	depth
daten	the date and time in matlab format; the number of days from January 0 0000	days	date
proj	Indicates the original project that published the data: 1 '[Nicholson et al. 2010]' 2 '[Hamme 2003]' 3 '[Hamme and Emerson, 2013]' 4 '[Well and Roether 2003]' 5 '[Stanley et al. 2009]' 6 '[Hamme and Severinghaus 2007]' 7 '[Loose and Jenkins 2014]'	unitless	no_bcodmo_term
Hesat	Helium saturation level; 100*(G/Geq -1)	percent	diss_noble_gas_conc
Nesat	Neon saturation level; 100*(G/Geq -1)	percent	diss_noble_gas_conc
Arsat	Argon saturation level; 100*(G/Geq -1)	percent	diss_noble_gas_conc
Krsat	Krypton saturation level; 100*(G/Geq -1)	percent	diss_noble_gas_conc
Xesat	Xenon saturation level; 100*(G/Geq -1)	percent	diss_noble_gas_conc
N2Arsat	Neon to Argon saturation ratio: ([G1]/[G2])/([G1]eq/[G2]eq)	dimensionless	diss_noble_gas_conc
KrArsat	Krypton to Argon saturation ratio: ([G1]/[G2])/([G1]eq/[G2]eq)	dimensionless	diss_noble_gas_conc

Database

Contribute Data

Dataset: Noble gas observations and model runs
Deployment: Nicholson_lab

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Noble gas observations and model runsDeployment: Nicholson_lab

Dataset acquisition description

Dataset Processing Description

Dataset: Noble gas observations and model runs
Deployment: Nicholson_lab