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 \nWe used the ignition method to determine total P and molybdate-reactive P\nconcentrations (MRP, which includes primarily free orthophosphate) for each\nsediment sample used for this study. Samples for total P analyses were ashed\nin crucibles at 550oC for 2 h and then extracted in 25 mL of 0.5 M sulfuric\nacid for 16 h. Samples for MRP analyses were extracted in the same manner,\nwithout the ashing step (Olsen and Sommers 1982; Cade-Menun and Lavkulich\n1997). We derived molybdate-unreactive P concentrations (MUP, which includes\nprimarily organic P and polyphosphates) in supernatants by subtracting MRP\nfrom total P concentrations. For ashed and unashed extracts, MRP was\ndetermined as described below.\n \nTotal P concentrations in sediment extracts were measured using inductively\ncoupled plasma optical emission spectroscopy (ICP-OES). Standards were\nprepared with the same solutions as those used for the extraction procedure in\norder to minimize matrix effects on P measurements. Sediment extracts and\nstandards (0 \\u03bcM, 3.2 \\u03bcM, 32 \\u03bcM and 320 \\u03bcM) were diluted to\nlower salt content to prevent salt buildup on the nebulizer. Concentration\ndata from both wavelengths (213 nm and 214 nm) were averaged to obtain extract\nconcentrations for each sample. The detection limit for P on this instrument\nfor both wavelengths is 0.4 \\u03bcM. The MRP concentrations were measured on a\nQuikChem 8000 automated ion analyzer. Standards were prepared with the same\nsolutions used for the extraction step to minimize matrix effects on P\nmeasurements. Sediment extracts and standards (0 \\u2013 30 \\u03bcM PO4) were\ndiluted ten-fold to prevent matrix interference with color development. The\ndetection limit for P on this instrument is 0.2 \\u03bcM. We derived MUP\nconcentrations 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 (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 Sediment TP MRP MUP \n  PI: Adina Paytan \n  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/ (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 2020-03-02T22:06:35Z
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 (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 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/ (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, 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 (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/805206 (external link)
attribute NC_GLOBAL param_mapping String {'805206': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/805206/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 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 [Sediment TP MRP MUP] - 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 (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 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/ (external link)
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)

 
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