ERDDAP > info > bcodmo_dataset_3920

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
	set	data	graph		files	public	Radiocarbon data from R/V Blue Heron cruise BH10-14 on Lake Superior in August 2010 (Lake Superior Radiocarbon project)		I   M	background			BCO-DMO	bcodmo_dataset_3920

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv
attribute	NC_GLOBAL	acquisition_description	String	Because the samples are initially processed on deck and radiocarbon is being measured, the engines of the R/V Blue Heron are shut down during this time allowing the vessel to drift (engines not going and thus less possibility for contamination from the stack), until the processing of the samples has been completed. Related files and references: Sampling procedures, instrumentation, discussion of blanks, etc, included in Zigah, P.K., E.C. Minor, J.P. Werne, and S. L. McCallister, 2011. Radiocarbon and stable carbon isotopic insights into provenance and cycling of carbon in Lake Superior. Limnology and Oceanography 56(3), 867-886. Isotopic data were processed as described in Radiocarbon Data & Calculations: [https://www.whoi.edu/nosams/page.do?pid=40146](\\"https://www.whoi.edu/nosams/page.do?pid=40146\\") Concentration data for DOC and DIC are from a Shimadzu TOC-Vcsh Analyzer. For DIC, the analyzer was calibrated using primary standard grade sodium carbonate and ACS reagent grade sodium bicarbonate. The inorganic carbon in the sample was volatilized with 25% H3PO4 (by weight) in a CO2-free closed reaction vessel, and the CO2 evolved was measured by a non-dispersive infrared (NDIR) gas detector. For DOC, the samples were acidified to pH 2 with ACS reagent grade HCl at the time of sampling. The TOC analyzer was run in NPOC mode and calibrated with potassium hydrogen phthalate (KHP). Deep seawater from Florida Strait at 700 m (Batch-8 2008) reference waters obtained from the DOC Consensus Reference Program (Hansell laboratory, University of Miami, USA) and additional KHP standards were interspersed and analyzed along with the samples to assess instrumental performance. Our mean DOC value of the external reference sample was 43.9 \u00b1 3.9 \u03bcM (n = 5), and agrees with the consensus value of 41-43 \u03bcM. For each sample and standard, three injections were performed. If the standard deviation was not \u2264 2.5%, two more injections were performed and the closest three of the five injections were averaged to yield sample concentration. Particulate organic samples (on GF/F filters) were fumigated with HCl, dried, then loaded into tin capsules and analyzed for particulate organic carbon (POC) and particulate organic nitrogen (PON) concentrations using a Costech ECS 4010 elemental analyzer (EA) coupled to Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS). The EA was calibrated with acetanilide (Costech Analytical Technologies Inc., Valencia, CA, USA) and caffeine (SigmalUltra; Wheaton Science Products, NJ, USA) reference standard materials; C and N were quantified using the IRMS. Typical instrumental precisions for POC and PON measurements were respectively, 0.2% and 0.4% of the measured concentrations.
attribute	NC_GLOBAL	awards_0_award_nid	String	54787
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-0825600
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0825600
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	Donald L. Rice
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	51467
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Version: 19 July 2013 PIs: Minor, Werne August/2010 Radiocarbon Data
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2013-04-23T18:57:01Z
attribute	NC_GLOBAL	date_modified	String	2019-10-31T16:11:25Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.3920.1
attribute	NC_GLOBAL	geospatial_lat_max	double	48.027
attribute	NC_GLOBAL	geospatial_lat_min	double	46.836
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/3920
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	IR Mass Spec
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Costech ECS 4010 elemental analyzer (EA) Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS) Particulate organic samples (on GF/F filters) were fumigated with HCl, dried, then loaded into tin capsules and analyzed for particulate organic carbon (POC) and particulate organic nitrogen (PON) concentrations using a Costech ECS 4010 elemental analyzer (EA) coupled to Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS). The EA was calibrated with acetanilide (Costech Analytical Technologies Inc., Valencia, CA, USA) and caffeine (SigmalUltra; Wheaton Science Products, NJ, USA) reference standard materials; C and N were quantified using the IRMS. Typical instrumental precisions for POC and PON measurements were respectively, 0.2% and 0.4% of the measured concentrations.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	6149
attribute	NC_GLOBAL	instruments_0_description	String	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).
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB16/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Isotope-ratio Mass Spectrometer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	469
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Isotope-ratio Mass Spectrometer
attribute	NC_GLOBAL	instruments_1_acronym	String	Shimadzu TOC-V
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	Concentration data for DOC and DIC are from a Shimadzu TOC-Vcsh Analyzer.
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	6151
attribute	NC_GLOBAL	instruments_1_description	String	A Shimadzu TOC-V Analyzer measures DOC by high temperature combustion method.
attribute	NC_GLOBAL	instruments_1_instrument_external_identifier	String	http://onto.nerc.ac.uk/CAST/124
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Shimadzu TOC-V Analyzer
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	603
attribute	NC_GLOBAL	instruments_1_supplied_name	String	Shimadzu TOC-V Analyzer
attribute	NC_GLOBAL	instruments_2_acronym	String	CHN_EA
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	Costech ECS 4010 elemental analyzer (EA) Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS) Particulate organic samples (on GF/F filters) were fumigated with HCl, dried, then loaded into tin capsules and analyzed for particulate organic carbon (POC) and particulate organic nitrogen (PON) concentrations using a Costech ECS 4010 elemental analyzer (EA) coupled to Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS). The EA was calibrated with acetanilide (Costech Analytical Technologies Inc., Valencia, CA, USA) and caffeine (SigmalUltra; Wheaton Science Products, NJ, USA) reference standard materials; C and N were quantified using the IRMS. Typical instrumental precisions for POC and PON measurements were respectively, 0.2% and 0.4% of the measured concentrations.
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	6150
attribute	NC_GLOBAL	instruments_2_description	String	A CHN Elemental Analyzer is used for the determination of carbon, hydrogen, and nitrogen content in organic and other types of materials, including solids, liquids, volatile, and viscous samples.
attribute	NC_GLOBAL	instruments_2_instrument_name	String	CHN Elemental Analyzer
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	625
attribute	NC_GLOBAL	instruments_2_supplied_name	String	CHN Elemental Analyzer
attribute	NC_GLOBAL	keywords	String	accession, Accession_Number, age, Age_Error, bco, bco-dmo, biological, chemical, commerce, conc, cruise, cruise_id, d13, d13C, d13C_Source, d14, D14C, data, dataset, date, Date_Reported, department, dic, DIC_Conc, dmo, doc, DOC_Conc, erddap, error, F_Modern, Fm_Error, identification, latitude, longitude, management, modern, number, oceanography, office, preliminary, process, receipt, Receipt_Number, reported, source, station, station_id, submitter, Submitter_Identification, type
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/3920/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/3920
attribute	NC_GLOBAL	Northernmost_Northing	double	48.027
attribute	NC_GLOBAL	param_mapping	String	{'3920': {'lat': 'flag - latitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/3920/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of Minnesota Duluth
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	LLO-UMD
attribute	NC_GLOBAL	people_0_person_name	String	Elizabeth C. Minor
attribute	NC_GLOBAL	people_0_person_nid	String	51349
attribute	NC_GLOBAL	people_0_role	String	Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	University of Minnesota Duluth
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	LLO-UMD
attribute	NC_GLOBAL	people_1_person_name	String	Josef P. Werne
attribute	NC_GLOBAL	people_1_person_nid	String	51350
attribute	NC_GLOBAL	people_1_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_1_role_type	String	originator
attribute	NC_GLOBAL	people_2_affiliation	String	University of Minnesota Duluth
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	LLO-UMD
attribute	NC_GLOBAL	people_2_person_name	String	Elizabeth C. Minor
attribute	NC_GLOBAL	people_2_person_nid	String	51349
attribute	NC_GLOBAL	people_2_role	String	Contact
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	people_3_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_3_person_name	String	Stephen R. Gegg
attribute	NC_GLOBAL	people_3_person_nid	String	50910
attribute	NC_GLOBAL	people_3_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_3_role_type	String	related
attribute	NC_GLOBAL	project	String	Lake Superior Radiocarbon
attribute	NC_GLOBAL	projects_0_acronym	String	Lake Superior Radiocarbon
attribute	NC_GLOBAL	projects_0_description	String	Organic carbon present in aquatic ecosystems has the potential to either be sequestered by sedimentary organic matter or recycled and contributed to the atmosphere through microbial respiration. Ultimately, the fate of organic matter is dependant upon its source, as well as the physical transport mechanisms and biogeochemical transformations it is exposed to in the water column. Because these processes vary significantly within aquatic systems, such as the ocean, it is difficult to assess the biogeochemical importance of organic carbon; however, it is a problem of critical importance whose results could be utilized to resolve key issues in global biogeochemical carbon cycles and to determine the net heterotrophy of most aquatic environments. Scientists from the University of Minnesota-Duluth and Virginia Commonwealth University would address this problem by studying organic carbon dynamics in Lake Superior because its biogeochemistry is similar to that of the world ocean. Using Lake Superior as a natural laboratory, the researchers plan to carry out radiocarbon measurements of particulate organic carbon (POC), dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), and bacterially-respired CO2, as well as obtain the chemical composition of DOC and POC during stratified and non-stratified periods. Results would be used to identify the sources of carbon in the lake and determined transformations of carbon between POC, DOC, DIC, and bacterially-respired CO2. Educational impacts include workshops and presentation for K-12 audiences as well as research and training opportunities for graduate and undergraduate students in Water Resources Science and Biochemistry classes. Cruise pictures and info (for a general audience)
attribute	NC_GLOBAL	projects_0_end_date	String	2011-08
attribute	NC_GLOBAL	projects_0_geolocation	String	Lake Superior
attribute	NC_GLOBAL	projects_0_name	String	How important is quote old unquote Carbon in Lake Superior. A Radiocarbon Investigation
attribute	NC_GLOBAL	projects_0_project_nid	String	2156
attribute	NC_GLOBAL	projects_0_start_date	String	2008-09
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	46.836
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	cruise_id
attribute	NC_GLOBAL	summary	String	Radiocarbon data from R/V Blue Heron cruise BH10-14 on Lake Superior in August 2010.
attribute	NC_GLOBAL	title	String	Radiocarbon data from R/V Blue Heron cruise BH10-14 on Lake Superior in August 2010 (Lake Superior Radiocarbon project)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	cruise_id		String
attribute	cruise_id	bcodmo_name	String	cruise_id
attribute	cruise_id	description	String	Cruise Id
attribute	cruise_id	long_name	String	Cruise Id
attribute	cruise_id	units	String	text
variable	Receipt_Number		int
attribute	Receipt_Number	_FillValue	int	2147483647
attribute	Receipt_Number	actual_range	int	83041, 83890
attribute	Receipt_Number	bcodmo_name	String	unknown
attribute	Receipt_Number	colorBarMaximum	double	100.0
attribute	Receipt_Number	colorBarMinimum	double	0.0
attribute	Receipt_Number	description	String	Receipt Number
attribute	Receipt_Number	long_name	String	Receipt Number
attribute	Receipt_Number	units	String	dimensionless
variable	Date_Reported		int
attribute	Date_Reported	_FillValue	int	2147483647
attribute	Date_Reported	actual_range	int	20101210, 20110502
attribute	Date_Reported	bcodmo_name	String	date
attribute	Date_Reported	description	String	Date the samples were analyzed at NOSAMS in yyyymmdd format.
attribute	Date_Reported	long_name	String	Date Reported
attribute	Date_Reported	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	Date_Reported	units	String	unitless
variable	station_id		String
attribute	station_id	bcodmo_name	String	station
attribute	station_id	description	String	Station Id
attribute	station_id	long_name	String	Station Id
attribute	station_id	units	String	text
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	46.836, 48.027
attribute	latitude	axis	String	Y
attribute	latitude	bcodmo_name	String	latitude
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	description	String	Latitude (South is negative)
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LATX/
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	lon		float
attribute	lon	_FillValue	float	NaN
attribute	lon	actual_range	float	-92.0054, -86.63017
attribute	lon	bcodmo_name	String	longitude
attribute	lon	colorBarMaximum	double	180.0
attribute	lon	colorBarMinimum	double	-180.0
attribute	lon	description	String	Longitude (West is negative)
attribute	lon	long_name	String	Longitude
attribute	lon	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LONX/
attribute	lon	standard_name	String	longitude
attribute	lon	units	String	decimal degrees
variable	Submitter_Identification		String
attribute	Submitter_Identification	bcodmo_name	String	unknown
attribute	Submitter_Identification	description	String	Submitter IdentificationComments from original sheet: Comment 1: HMW DOM are 1kDa material Comment 2: DOCW means
attribute	Submitter_Identification	long_name	String	Submitter Identification
attribute	Submitter_Identification	units	String	text
variable	Type		String
attribute	Type	bcodmo_name	String	unknown
attribute	Type	description	String	Type
attribute	Type	long_name	String	Type
attribute	Type	units	String	text
variable	Process		String
attribute	Process	bcodmo_name	String	unknown
attribute	Process	description	String	Process type
attribute	Process	long_name	String	Process
attribute	Process	units	String	text
variable	Accession_Number		String
attribute	Accession_Number	bcodmo_name	String	accession number
attribute	Accession_Number	description	String	Accession Number
attribute	Accession_Number	long_name	String	Accession Number
attribute	Accession_Number	units	String	OS-xxxxx
variable	F_Modern		float
attribute	F_Modern	_FillValue	float	NaN
attribute	F_Modern	actual_range	float	0.2646, 1.077
attribute	F_Modern	bcodmo_name	String	unknown
attribute	F_Modern	description	String	fraction modern
attribute	F_Modern	long_name	String	F Modern
attribute	F_Modern	units	String	Unitless
variable	Fm_Error		float
attribute	Fm_Error	_FillValue	float	NaN
attribute	Fm_Error	actual_range	float	0.0019, 0.0144
attribute	Fm_Error	bcodmo_name	String	unknown
attribute	Fm_Error	colorBarMaximum	double	50.0
attribute	Fm_Error	colorBarMinimum	double	0.0
attribute	Fm_Error	description	String	the error in fraction modern (as determined by NOSAMS)
attribute	Fm_Error	long_name	String	Fm Error
attribute	Fm_Error	units	String	Unitless
variable	Age		short
attribute	Age	_FillValue	short	32767
attribute	Age	actual_range	short	5, 10700
attribute	Age	bcodmo_name	String	unknown
attribute	Age	description	String	Age
attribute	Age	long_name	String	Age
attribute	Age	units	String	Radiocarbon years
variable	Age_Error		short
attribute	Age_Error	_FillValue	short	32767
attribute	Age_Error	actual_range	short	25, 420
attribute	Age_Error	bcodmo_name	String	unknown
attribute	Age_Error	colorBarMaximum	double	50.0
attribute	Age_Error	colorBarMinimum	double	0.0
attribute	Age_Error	description	String	Age Error
attribute	Age_Error	long_name	String	Age Error
attribute	Age_Error	units	String	Radiocarbon years
variable	d13C		float
attribute	d13C	_FillValue	float	NaN
attribute	d13C	actual_range	float	-30.39, 1.52
attribute	d13C	bcodmo_name	String	unknown
attribute	d13C	description	String	delta13C
attribute	d13C	long_name	String	D13 C
attribute	d13C	units	String	per mille
variable	d13C_Source		String
attribute	d13C_Source	bcodmo_name	String	unknown
attribute	d13C_Source	description	String	delta13C Source
attribute	d13C_Source	long_name	String	D13 C Source
attribute	d13C_Source	units	String	text
variable	D14C		float
attribute	D14C	_FillValue	float	NaN
attribute	D14C	actual_range	float	-737.31, 69.25
attribute	D14C	bcodmo_name	String	unknown
attribute	D14C	description	String	DELTA14C
attribute	D14C	long_name	String	D14 C
attribute	D14C	units	String	per mille
variable	DIC_Conc		float
attribute	DIC_Conc	_FillValue	float	NaN
attribute	DIC_Conc	actual_range	float	0.62, 1.9
attribute	DIC_Conc	bcodmo_name	String	unknown
attribute	DIC_Conc	description	String	DIC Conc
attribute	DIC_Conc	long_name	String	DIC Conc
attribute	DIC_Conc	units	String	mmol/kg
variable	DOC_Conc		float
attribute	DOC_Conc	_FillValue	float	NaN
attribute	DOC_Conc	actual_range	float	8.55, 887.24
attribute	DOC_Conc	bcodmo_name	String	unknown
attribute	DOC_Conc	description	String	DOC Conc
attribute	DOC_Conc	long_name	String	DOC Conc
attribute	DOC_Conc	units	String	um/kg

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.