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 Location:\n \nArctic Ocean: P-1-94-AR P21, 84o5' N, 174o58' W  \n California margin: W-2-98-NC TF1, 41o5' N, 125o1' W  \n Equatorial Pacific: TT013-06MC, 12o00' S, 134o56' W\n \nMethodology:\n \nSolid sediment samples were transferred to two 50 mL centrifuge tubes (2\nsample replicates combined per tube). We added 20 mL of 0.25 M NaOH + 0.05 M\nNa2EDTA solution to each tube, vortexed until all sediment was resuspended and\nthen shook samples for 6 h at room temperature (Cade-Menun et al. 2005). We\nused a solid to solution ratio of 1:5 for this step to minimize the amount of\nfreeze-dried material that will need to be dissolved for the 31P NMR\nexperiments. Large amounts of salts from the NaOH-EDTA concentrated in NMR\nsamples lead to higher viscosity and increase line broadening on NMR spectra\n(Cade-Menun and Liu 2013). We chose an extraction time of 6 h to improve total\nP recovery while limiting the degradation of natural P compounds in the\nsample. At the end of the extraction, samples were centrifuged at 3,700 rpm\nfor 15 min and supernatants decanted into 50 mL centrifuge tubes. We collected\na 500 \\u03bcL aliquot from each sample, which we diluted with 4.5 mL of\nultrapure water. These were refrigerated until analysis for total P content on\nthe ICP-OES. The sample residues and supernatants were frozen on a slant to\nmaximize the exposed surface area during the lyophilization step; this was\ndone immediately after the removal of the 500 \\u03bcL aliquot. Once completely\nfrozen, the uncapped tubes containing supernatants and residues were freeze-\ndried over the course of 48 h. Each tube was covered with parafilm with small\nholes from a tack to minimize contamination. Freeze-dried supernatants from\nidentical sample splits were combined and dissolved in 500 \\u03bcL each of\nultrapure water, D2O, NaOH-EDTA and 10 M NaOH prior to 31P NMR analysis. The\nD2O is required as signal lock in the spectrometer (Cade-Menun and Liu 2013).\nSample pH was maintained at a pH > 12 to optimize peak separation (Cade-Menun\n2005; Cade-Menun and Liu 2013). Sample pH was assessed with a glass electrode,\nand verified with pH paper to account for the alkaline error caused by the\nhigh salt content of our samples (Covington 1985).\n \nTotal P and metal concentrations in sediment extracts were measured using\ninductively coupled plasma optical emission spectroscopy (ICP-OES). Standards\nwere prepared with the same solutions as those used for the extraction\nprocedure in order to minimize matrix effects on P measurements. Sediment\nextracts and standards (0 \\u03bcM, 3.2 \\u03bcM, 32 \\u03bcM and 320 \\u03bcM)\nwere diluted to lower salt content to prevent salt buildup on the nebulizer.\nConcentration data from both wavelengths (213 nm and 214 nm) were averaged to\nobtain extract concentrations for each sample. The detection limit for P on\nthis instrument for both wavelengths is 0.4 \\u03bcM.\n \nFreeze-dried sample residues were ashed in crucibles at 550oC for 2 h and then\nextracted in 25 mL of 0.5 M sulfuric acid for 16 h (Olsen and Sommers 1982;\nCade-Menun and Lavkulich 1997). We centrifuged samples at 3,700 rpm for 15\nmin, filtered supernatants with 0.4 \\u03bcm polycarbonate filters, and\nmeasured P content on an ICP-OES.
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 TP metals sediments with no pretreatment \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 2020-03-02T22:08:39Z
attribute NC_GLOBAL date_modified String 2020-07-02T21:01:48Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.805216.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/805216 (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 805225
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 analyte, Analyte_Name, bco, bco-dmo, biological, calib, chemical, conc, Conc_Calib, corr, data, dataset, dilution, dmo, erddap, extract, int, Int_Corr, management, name, oceanography, office, preliminary, rsd, RSD_Corr_Int, sample, Sample_ID, type
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/805216/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/805216 (external link)
attribute NC_GLOBAL param_mapping String {'805216': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/805216/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 summary String Total phosphorus and metal concentrations from sediment extracts from samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998.
attribute NC_GLOBAL title String [TP metals sediments with no pretreatment] - Total phosphorus and metal concentrations from sediment extracts from 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 Type String
attribute Type bcodmo_name String sample_descrip
attribute Type description String Type (NMR extract or Residue)
attribute Type long_name String Type
attribute Type units String unitless
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 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 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 Int_Corr double
attribute Int_Corr _FillValue double NaN
attribute Int_Corr actual_range double -483.6220124, 2.858785422E7
attribute Int_Corr bcodmo_name String unknown
attribute Int_Corr description String Intensity (corrected)
attribute Int_Corr long_name String Int Corr
attribute Int_Corr units String unknown
variable RSD_Corr_Int double
attribute RSD_Corr_Int _FillValue double NaN
attribute RSD_Corr_Int actual_range double 0.1423364373, 104133.066
attribute RSD_Corr_Int bcodmo_name String standard deviation
attribute RSD_Corr_Int description String Relative standard deviation
attribute RSD_Corr_Int long_name String RSD Corr Int
attribute RSD_Corr_Int units String unknown
variable Conc_Calib double
attribute Conc_Calib _FillValue double NaN
attribute Conc_Calib actual_range double -0.1235444804, 205.1316777
attribute Conc_Calib bcodmo_name String P
attribute Conc_Calib description String Calibrated concentration of total phosphorous
attribute Conc_Calib long_name String Conc Calib
attribute Conc_Calib units String parts per million (ppm)

 
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