BCO-DMO ERDDAP
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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:\n \nArctic Ocean: P-1-94-AR P21, 84\\u00b05' N, 174\\u00b058' W  \n California margin: W-2-98-NC TF1, 41\\u00b05' N, 125\\u00b01' W  \n Equatorial Pacific: TT013-06MC, 12\\u00b000' S, 134\\u00b056' W\n \nMethodology:\n \nPrior to the extraction, we freeze-dried, ground and sieved sediment samples\nto less than 125 \\u03bcm (Ruttenberg 1992). For a given sample, we weighed\nfour sample replicates (2 g) and placed each in 250 mL HDPE bottles. Sodium\ndithionite (F.W. 147.12 g/mol; 7.4 g) was added to each sample split, followed\nby 200 mL of citrate-bicarbonate solution (pH 7.6). This step produces\neffervescence, so the solution should be added slowly to the sample. We shook\nsamples for 8 h and then centrifuged them at 3,700 rpm for 15 min. We filtered\nthe supernatants with a 0.4 \\u03bcm polycarbonate filter. We took 20 mL\naliquots from the filtrate for each sample split for MRP and total P analyses,\nand kept them refrigerated until analysis within 24 h. We added 200 mL of\nultrapure water to the solid residue for each sample split as a wash step\nafter the above reductive step, shook samples for 2 h, and then centrifuged\nthem at 3,700 rpm for 15 min. We filtered the supernatants with 0.4 \\u03bcm\npolycarbonate filters and set aside 20 mL of filtrate from each sample split\nfor MRP and total P analyses. We then extracted the solid sample residues in\n200 mL of sodium acetate buffer (pH 4.0) for 6 h. At the end of this\nextraction step, we centrifuged the bottles at 3,700 rpm for 15 min, filtered\nthe supernatants with 0.4 \\u03bcm polycarbonate filters and took a 20 mL\naliquot of filtrate from each sample split for MRP and total P analyses. We\nadded 200 mL of ultrapure water to the solid residue for each sample split as\na wash step, shook samples for 2 h, and then centrifuged them at 3,700 rpm for\n15 min. We filtered the supernatants with 0.4 \\u03bcm polycarbonate filters\nand set aside 20 mL of filtrate from each sample split for MRP and total P\nanalyses. We repeated the water rinse step, and collected aliquots for MRP and\ntotal P analyses as in the previous steps. The concentrations of MRP were\ndetermined as described below.\n \nThe MRP concentrations were measured on a QuikChem 8000 automated ion\nanalyzer. Standards were prepared with the same solutions used for the\nextraction step to minimize matrix effects on P measurements. Sediment\nextracts and standards (0 30 \\u03bcM PO4) were diluted ten-fold to prevent\nmatrix interference with color development. The detection limit for P on this\ninstrument is 0.2 \\u03bcM. We derived MUP concentrations by subtracting MRP\nfrom 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 (external link)
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 \n  PI: Adina Paytan \n  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/ (external link)
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 (external link)
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/ (external link)
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 (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/798995 (external link)
attribute NC_GLOBAL param_mapping String {'798995': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/798995/parameters (external link)
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. \nNSF C-DEBI Award #156246 to Dr. Adina Paytan\nNSF 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 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
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/ (external link)
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/ (external link)
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

 
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