Dataset: N2 Gas Excess

Name: N2 gas concentration in excess of saturation determined by N2:Ar ratiometry from samples collected in the Bering Sea, Chukchi Sea, and Western Arctic on cruise HLY1702 from August to September 2017
Published: 2020-05-20
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.812052.1

Spatial Extent: N:73.56 E:-157.152317 S:62.39 W:-174.574833

Temporal Extent: 2017-08-29 - 2017-09-12

Project:

Collaborative Research: GEOTRACES Arctic Ocean section-Constraining Nitrogen Cycling in the western Arctic Ocean. (US GEOTRACES Arctic Nitrogen Flux)

Principal Investigator:

Mark A. Altabet (University of Massachusetts Dartmouth SMAST, UMASSD-SMAST)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2020-05-20

Restricted:

Validated:

Current State:

Final no updates expected

N2 gas concentration in excess of saturation determined by N2:Ar ratiometry from samples collected in the Bering Sea, Chukchi Sea, and Western Arctic on cruise HLY1702 from August to September 2017

Abstract:

N2 gas concentration in excess of saturation determined by N2:Ar ratiometry from samples collected in the Bering Sea, Chukchi Sea, and Western Arctic on cruise HLY1702 from August to September 2017.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2020-05-20	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.812052.1	2022-05-05

Description

N2 gas concentration in excess of saturation determined by N2:Ar ratiometry.

Methods & Sampling

Sampling at sea was done using a standard SeaBird CTD/Rosette system. Hydrographic data processing used SeaBird software and standard procedures.

N2 excess was determined from N2/Ar ratios measured using procedures described by Charoenpong et al. (2014) with an IsoPrime Isotope Ratio Mass Spectrometer (IRMS) using IonVantage software.

Final data reduction and organization was done using Microsoft Excel.

Data Processing Description

BCO-DMO Processing:
- renamed fields;
- changed date format to yyyy-mm-dd from mm/dd/yy;
- changed #N/A to nd ("no data").

Data Files

File
N2_excess.csv (Comma Separated Values (.csv), 16.44 KB) MD5:7f74c0fdadd81b9629d8a5f7cd72f25a Primary data file for dataset ID 812052

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1434417

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
HLY1702		2017-08-26	USCGC Healy	Robert S. Pickart (Chief Scientist)	data info

Instruments

CTD Sea-Bird

Supplied Name: SeaBird CTD/Rosette

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics, no specific unit identified. This instrument designation is used when specific make and model are not known. See also other SeaBird instruments listed under CTD. More information from Sea-Bird Electronics.

Isotope-ratio Mass Spectrometer

Supplied Name: IsoPrime Isotope Ratio Mass Spectrometer (IRMS)

Supplied Description:

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).

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Station	Station number	unitless	station
Niskin	Niskin bottle number	unitless	bottle
Lat	Latitude	degrees North	lat
Lon	Longitude	degrees East	lon
Date	Date; format: yyyy-mm-dd	unitless	date
Depth	Depth	meters (m)	depth
Temp	Temperature	degrees Celsius	temp
Salinity	Salinity	unitless	sal
Sigma_Theta	Sigma theta density	kg/m3 -1000	sigma_theta
excess_N2	Excess N2	umol/kg	N
excess_N2_stdev	Standard deviation of replicate measurements	umol/kg	N

Status message

Database

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Dataset: N2 Gas Excess