ERDDAP > info > bcodmo_dataset_798995

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
	set	data	graph		files	public	[MRP sediments with pretreatment] - Molybdate reactive phosphorus concentrations in NMR pretreatment extracts from sediment samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998 (A new marine sediment sample preparation scheme for solution 31P NMR analysis)		I   M	background			BCO-DMO	bcodmo_dataset_798995

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	Locations: Arctic Ocean: P-1-94-AR P21, 84\u00b05' N, 174\u00b058' W California margin: W-2-98-NC TF1, 41\u00b05' N, 125\u00b01' W Equatorial Pacific: TT013-06MC, 12\u00b000' S, 134\u00b056' W Methodology: Prior to the extraction, we freeze-dried, ground and sieved sediment samples to less than 125 \u03bcm (Ruttenberg 1992). For a given sample, we weighed four sample replicates (2 g) and placed each in 250 mL HDPE bottles. Sodium dithionite (F.W. 147.12 g/mol; 7.4 g) was added to each sample split, followed by 200 mL of citrate-bicarbonate solution (pH 7.6). This step produces effervescence, so the solution should be added slowly to the sample. We shook samples for 8 h and then centrifuged them at 3,700 rpm for 15 min. We filtered the supernatants with a 0.4 \u03bcm polycarbonate filter. We took 20 mL aliquots from the filtrate for each sample split for MRP and total P analyses, and kept them refrigerated until analysis within 24 h. We added 200 mL of ultrapure water to the solid residue for each sample split as a wash step after the above reductive step, shook samples for 2 h, and then centrifuged them at 3,700 rpm for 15 min. We filtered the supernatants with 0.4 \u03bcm polycarbonate filters and set aside 20 mL of filtrate from each sample split for MRP and total P analyses. We then extracted the solid sample residues in 200 mL of sodium acetate buffer (pH 4.0) for 6 h. At the end of this extraction step, we centrifuged the bottles at 3,700 rpm for 15 min, filtered the supernatants with 0.4 \u03bcm polycarbonate filters and took a 20 mL aliquot of filtrate from each sample split for MRP and total P analyses. We added 200 mL of ultrapure water to the solid residue for each sample split as a wash step, shook samples for 2 h, and then centrifuged them at 3,700 rpm for 15 min. We filtered the supernatants with 0.4 \u03bcm polycarbonate filters and set aside 20 mL of filtrate from each sample split for MRP and total P analyses. We repeated the water rinse step, and collected aliquots for MRP and total P analyses as in the previous steps. The concentrations of MRP were determined as described below. The MRP concentrations were measured on a QuikChem 8000 automated ion analyzer. Standards were prepared with the same solutions used for the extraction step to minimize matrix effects on P measurements. Sediment extracts and standards (0 30 \u03bcM PO4) were diluted ten-fold to prevent matrix interference with color development. The detection limit for P on this instrument is 0.2 \u03bcM. We derived MUP concentrations by subtracting MRP from total P concentrations, which are included in a different dataset.
attribute	NC_GLOBAL	awards_0_award_nid	String	554980
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-0939564
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward?AWD_ID=0939564
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	David L. Garrison
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50534
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	MRP sediments with pretreatment PI: Adina Paytan Data Version 1: 2020-04-13
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	dataset_current_state	String	Final and no updates
attribute	NC_GLOBAL	date_created	String	2020-02-28T20:30:03Z
attribute	NC_GLOBAL	date_modified	String	2020-07-02T21:02:33Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.798995.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/798995
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	FIA
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	799005
attribute	NC_GLOBAL	instruments_0_description	String	An instrument that performs flow injection analysis. Flow injection analysis (FIA) is an approach to chemical analysis that is accomplished by injecting a plug of sample into a flowing carrier stream. FIA is an automated method in which a sample is injected into a continuous flow of a carrier solution that mixes with other continuously flowing solutions before reaching a detector. Precision is dramatically increased when FIA is used instead of manual injections and as a result very specific FIA systems have been developed for a wide array of analytical techniques.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB36/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Flow Injection Analyzer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	657
attribute	NC_GLOBAL	instruments_0_supplied_name	String	QuikChem 8000 automated ion analyzer
attribute	NC_GLOBAL	keywords	String	Actual_PO4, analyte, Analyte_Name, area, bco, bco-dmo, biological, blank, blank_corrected, chemical, chemistry, concentration, corrected, data, dataset, date, dilution, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Phosphate, erddap, extract, extracted, height, management, mass, mass_concentration_of_phosphate_in_sea_water, name, ocean, oceanography, oceans, office, P_extracted, peak, Peak_Area, Peak_Concentration, Peak_Height, phosphate, po4, preliminary, sample, Sample_ID, science, sea, seawater, sed, Sed_mass, step, time, water
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/798995/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/798995
attribute	NC_GLOBAL	param_mapping	String	{'798995': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/798995/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of California-Santa Cruz
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	UC Santa Cruz
attribute	NC_GLOBAL	people_0_person_name	String	Adina Paytan
attribute	NC_GLOBAL	people_0_person_nid	String	50821
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 California-Santa Cruz
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	UC Santa Cruz
attribute	NC_GLOBAL	people_1_person_name	String	Dr Delphine Defforey
attribute	NC_GLOBAL	people_1_person_nid	String	664058
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	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_2_person_name	String	Amber D. York
attribute	NC_GLOBAL	people_2_person_nid	String	643627
attribute	NC_GLOBAL	people_2_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	project	String	Marine Sediment Analysis 31P NMR
attribute	NC_GLOBAL	projects_0_acronym	String	Marine Sediment Analysis 31P NMR
attribute	NC_GLOBAL	projects_0_description	String	We developed and tested a new approach to prepare marine sediment samples for solution 31P nuclear magnetic resonance spectroscopy (31P NMR). This approach addresses the effects of sample pretreatment on sedimentary P composition and increases the signal of low abundance P species in 31P NMR spectra by removing up the majority inorganic P  from sediment samples while causing minimal alteration of the chemical structure of organic P compounds. The method was tested on natural marine sediment samples from different localities (Equatorial Pacific, California Margin and Arctic Ocean) with high inorganic P content, and allowed for the detection of low abundance P forms in samples for which only an orthophosphate signal could be resolved with an NaOH-EDTA extraction alone. This new approach will allow the use of 31P NMR on samples for which low organic P concentrations previously hindered the use of this tool, and will help answer longstanding question regarding the fate of organic P in marine sediments. We developed and tested a new approach to prepare marine sediment samples for solution 31P nuclear magnetic resonance spectroscopy (31P NMR). This approach addresses the effects of sample pretreatment on sedimentary P composition and increases the signal of low abundance P species in 31P NMR spectra by removing up the majority inorganic P  from sediment samples while causing minimal alteration of the chemical structure of organic P compounds. The method was tested on natural marine sediment samples from different localities (Equatorial Pacific, California Margin and Arctic Ocean) with high inorganic P content, and allowed for the detection of low abundance P forms in samples for which only an orthophosphate signal could be resolved with an NaOH-EDTA extraction alone. This new approach will allow the use of 31P NMR on samples for which low organic P concentrations previously hindered the use of this tool, and will help answer longstanding question regarding the fate of organic P in marine sediments.  NSF C-DEBI Award #156246 to Dr. Adina Paytan NSF C-DEBI Award #157598 to Dr. Delphine Defforey
attribute	NC_GLOBAL	projects_0_geolocation	String	Equatorial Pacific, California Margin, Arctic Ocean
attribute	NC_GLOBAL	projects_0_name	String	A new marine sediment sample preparation scheme for solution 31P NMR analysis
attribute	NC_GLOBAL	projects_0_project_nid	String	664054
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	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	Analyte_Name
attribute	NC_GLOBAL	summary	String	Molybdate reactive phosphorus concentrations in nuclear magnetic resonance (NMR) pretreatment extracts from sediment samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998.
attribute	NC_GLOBAL	title	String	[MRP sediments with pretreatment] - Molybdate reactive phosphorus concentrations in NMR pretreatment extracts from sediment samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998 (A new marine sediment sample preparation scheme for solution 31P NMR analysis)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.5
variable	Extract		String
attribute	Extract	bcodmo_name	String	sample_descrip
attribute	Extract	description	String	Extraction solution
attribute	Extract	long_name	String	Extract
attribute	Extract	units	String	unitless
variable	Step		String
attribute	Step	bcodmo_name	String	sample_descrip
attribute	Step	description	String	Step in the sequential extraction scheme (1–4)
attribute	Step	long_name	String	Step
attribute	Step	units	String	unitless
variable	Dilution		String
attribute	Dilution	bcodmo_name	String	treatment
attribute	Dilution	description	String	Sample dilution or "None"
attribute	Dilution	long_name	String	Dilution
attribute	Dilution	units	String	unitless
variable	Date		String
attribute	Date	bcodmo_name	String	date
attribute	Date	description	String	Date the samples were analyzed in ISO 8601 format yyyy-mm-dd
attribute	Date	long_name	String	Date
attribute	Date	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	Date	source_name	String	Date
attribute	Date	time_precision	String	1970-01-01
attribute	Date	units	String	unitless
variable	Sample_ID		String
attribute	Sample_ID	bcodmo_name	String	sample
attribute	Sample_ID	description	String	Unique sample identifier
attribute	Sample_ID	long_name	String	Sample ID
attribute	Sample_ID	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/ACYC/
attribute	Sample_ID	units	String	unitless
variable	Analyte_Name		String
attribute	Analyte_Name	bcodmo_name	String	sample_descrip
attribute	Analyte_Name	description	String	Element analyzed
attribute	Analyte_Name	long_name	String	Analyte Name
attribute	Analyte_Name	units	String	unitless
variable	Peak_Concentration		float
attribute	Peak_Concentration	_FillValue	float	NaN
attribute	Peak_Concentration	actual_range	float	0.0184, 73.9
attribute	Peak_Concentration	bcodmo_name	String	PO4
attribute	Peak_Concentration	description	String	Phosphate concentration (uncorrected)
attribute	Peak_Concentration	long_name	String	Peak Concentration
attribute	Peak_Concentration	units	String	micromolar (uM)
variable	blank_corrected		float
attribute	blank_corrected	_FillValue	float	NaN
attribute	blank_corrected	actual_range	float	1.17, 73.85
attribute	blank_corrected	bcodmo_name	String	sample_descrip
attribute	blank_corrected	description	String	Concentration adjusted after blank
attribute	blank_corrected	long_name	String	Blank Corrected
attribute	blank_corrected	units	String	unitless
variable	Actual_PO4		float
attribute	Actual_PO4	_FillValue	float	NaN
attribute	Actual_PO4	actual_range	float	12.716, 399.2
attribute	Actual_PO4	bcodmo_name	String	PO4
attribute	Actual_PO4	description	String	Concentration corrected for dilution
attribute	Actual_PO4	long_name	String	Mass Concentration Of Phosphate In Sea Water
attribute	Actual_PO4	units	String	micromolar (uM)
variable	P_extracted		float
attribute	P_extracted	_FillValue	float	NaN
attribute	P_extracted	actual_range	float	0.69, 121.16
attribute	P_extracted	bcodmo_name	String	PO4
attribute	P_extracted	description	String	Amount of phosphorus extracted
attribute	P_extracted	long_name	String	P Extracted
attribute	P_extracted	units	String	micromoles (umol)
variable	Sed_mass		float
attribute	Sed_mass	_FillValue	float	NaN
attribute	Sed_mass	actual_range	float	2.4998, 2.51
attribute	Sed_mass	bcodmo_name	String	mass_dry
attribute	Sed_mass	description	String	Dried sediment mass
attribute	Sed_mass	long_name	String	Sed Mass
attribute	Sed_mass	units	String	grams (g)
variable	PO4		float
attribute	PO4	_FillValue	float	NaN
attribute	PO4	actual_range	float	0.28, 48.35
attribute	PO4	bcodmo_name	String	PO4
attribute	PO4	description	String	Micromoles of phosphorus per gram of sediment (ground dry weight)
attribute	PO4	long_name	String	Mass Concentration Of Phosphate In Sea Water
attribute	PO4	units	String	micromoles per gram (umol/g)
variable	Peak_Area		float
attribute	Peak_Area	_FillValue	float	NaN
attribute	Peak_Area	actual_range	float	-0.0218, 28.0
attribute	Peak_Area	bcodmo_name	String	unknown
attribute	Peak_Area	description	String	Peak area
attribute	Peak_Area	long_name	String	Peak Area
attribute	Peak_Area	units	String	volts
variable	Peak_Height		float
attribute	Peak_Height	_FillValue	float	NaN
attribute	Peak_Height	actual_range	float	-0.00177, 2.32
attribute	Peak_Height	bcodmo_name	String	unknown
attribute	Peak_Height	description	String	Peak height
attribute	Peak_Height	long_name	String	Peak Height
attribute	Peak_Height	units	String	volts

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.