ERDDAP > info > bcodmo_dataset_805206

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	Total molybdate reactive and unreactive phosphorus concentrations from sediment extracts from sediment samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998		I   M	background			BCO-DMO	bcodmo_dataset_805206

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: We used the ignition method to determine total P and molybdate-reactive P concentrations (MRP, which includes primarily free orthophosphate) for each sediment sample used for this study. Samples for total P analyses were ashed in crucibles at 550oC for 2 h and then extracted in 25 mL of 0.5 M sulfuric acid for 16 h. Samples for MRP analyses were extracted in the same manner, without the ashing step (Olsen and Sommers 1982; Cade-Menun and Lavkulich 1997). We derived molybdate-unreactive P concentrations (MUP, which includes primarily organic P and polyphosphates) in supernatants by subtracting MRP from total P concentrations. For ashed and unashed extracts, MRP was determined as described below. Total P concentrations in sediment extracts were measured using inductively coupled plasma optical emission spectroscopy (ICP-OES). Standards were prepared with the same solutions as those used for the extraction procedure in order to minimize matrix effects on P measurements. Sediment extracts and standards (0 \u03bcM, 3.2 \u03bcM, 32 \u03bcM and 320 \u03bcM) were diluted to lower salt content to prevent salt buildup on the nebulizer. Concentration data from both wavelengths (213 nm and 214 nm) were averaged to obtain extract concentrations for each sample. The detection limit for P on this instrument for both wavelengths is 0.4 \u03bcM. 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 \u2013 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.
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	Sediment TP MRP MUP PI: Adina Paytan Data Version 1: 2020-06-23
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	2020-03-02T22:06:35Z
attribute	NC_GLOBAL	date_modified	String	2020-07-02T21:02:02Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.805206.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/805206
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	FIA
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	805215
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, bco, bco-dmo, biological, chemical, chemistry, concentration, data, dataset, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Phosphate, erddap, management, mass, mass_concentration_of_phosphate_in_sea_water, name, ocean, oceanography, oceans, office, peak, Peak_Concentration, phosphate, po4, preliminary, replicate, sample, Sample_Name, science, sea, seawater, sediment, Sediment_mass, umol_PO4, umol_PO4_per_g, water
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/805206/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/805206
attribute	NC_GLOBAL	param_mapping	String	{'805206': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/805206/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	Sediment_mass
attribute	NC_GLOBAL	summary	String	Total molybdate reactive and unreactive phosphorus concentrations from sediment extracts from sediment samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998.
attribute	NC_GLOBAL	title	String	Total molybdate reactive and unreactive phosphorus concentrations from sediment extracts from sediment samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.5
variable	Replicate		byte
attribute	Replicate	_FillValue	byte	127
attribute	Replicate	actual_range	byte	1, 3
attribute	Replicate	bcodmo_name	String	replicate
attribute	Replicate	description	String	Replicate of an individual sample
attribute	Replicate	long_name	String	Replicate
attribute	Replicate	units	String	unitless
variable	Sample_Name		String
attribute	Sample_Name	bcodmo_name	String	sample
attribute	Sample_Name	description	String	Sample name
attribute	Sample_Name	long_name	String	Sample Name
attribute	Sample_Name	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/ACYC/
attribute	Sample_Name	units	String	unitless
variable	Peak_Concentration		float
attribute	Peak_Concentration	_FillValue	float	NaN
attribute	Peak_Concentration	actual_range	float	9.82, 72.96
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	Actual_PO4		float
attribute	Actual_PO4	_FillValue	float	NaN
attribute	Actual_PO4	actual_range	float	226.26, 1872.0
attribute	Actual_PO4	bcodmo_name	String	PO4
attribute	Actual_PO4	description	String	Phosphate 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	umol_PO4		float
attribute	umol_PO4	_FillValue	float	NaN
attribute	umol_PO4	actual_range	float	2.26, 18.72
attribute	umol_PO4	bcodmo_name	String	P
attribute	umol_PO4	description	String	Amount of phosphorus extracted
attribute	umol_PO4	long_name	String	Mass Concentration Of Phosphate In Sea Water
attribute	umol_PO4	units	String	micromoles (umol)
variable	Sediment_mass		float
attribute	Sediment_mass	_FillValue	float	NaN
attribute	Sediment_mass	actual_range	float	0.1, 0.1
attribute	Sediment_mass	bcodmo_name	String	weight
attribute	Sediment_mass	description	String	Dried sediment mass
attribute	Sediment_mass	long_name	String	Sediment Mass
attribute	Sediment_mass	units	String	grams (g)
variable	umol_PO4_per_g		float
attribute	umol_PO4_per_g	_FillValue	float	NaN
attribute	umol_PO4_per_g	actual_range	float	22.58, 187.01
attribute	umol_PO4_per_g	bcodmo_name	String	P
attribute	umol_PO4_per_g	description	String	Micromoles of phosphorus per gram of sediment (ground dry weight)
attribute	umol_PO4_per_g	long_name	String	Mass Concentration Of Phosphate In Sea Water
attribute	umol_PO4_per_g	units	String	micromoles per gram (umol/g)

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.