Dataset: Noble gas observations and model runs

Name: Noble gas global observations used in the ECCO noble gas model and simulations decomposed to isolate bubble-mediated gas exchange (Noble gas modeling project)
Published: 2017-01-23
Keywords: oceans

Cite This Dataset

Spatial Extent: N:69.9983 E:167 S:-72.4933 W:30.0001

Project:

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

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)

Version Date:

2017-01-23

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Noble gas global observations used in the ECCO noble gas model and simulations decomposed to isolate bubble-mediated gas exchange (Noble gas modeling project)

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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.

Data Files

File
noble_gas_obs.csv (Comma Separated Values (.csv), 437.12 KB) MD5:85b65d7186f90acf86c3676c8e204347 Primary data file for dataset ID 675575

More Information about this dataset

Funding Sources

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

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Nicholson_lab		2011-09-01	WHOI	David P. Nicholson (Principal Investigator)	data info

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

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
daten	the date and time in matlab format; the number of days from January 0 0000	days	date
lon	longitude; east is positive	decimal degrees	lon
lat	latitude; north is positive	decimal degrees	lat
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
depth	sample depth	meters	depth
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
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

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Dataset: Noble gas observations and model runs