BCO-DMO ERDDAP
Accessing BCO-DMO data 		log in    
Brought to you by BCO-DMO    
 
 
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 Natural seawater from the Gulf of Mexico with a salinity of 35.0 was filtered\nand ultrafiltered sequentially through a 0.4 \\u00b5m cartridge (GE-Osmonics)\nand a 1 kDa ultrafiltration membrane (Millipore-Amicon), to remove suspended\nparticles and colloidal matter. 210Po and 210Pb (in equilibrium) in 1 N HNO3-2\nN HCl were purchased from Eckert & Ziegler Isotopes Products. 7Be tracer was\nproduced at the Paul Scherrer Institute, Switzerland and preserved in 0.5 N\nHCl. All experiments were conducted in a constant temperature laboratory to\navoid the influence of changing temperature.\\u00a0\n \nFor sorption experiments, 49 ml of the <1 kDa ultrafiltrate of seawater in a\nstirred-cell unit was added with 1 ml of non-complexing Tris-HCl buffer\nsolution to maintain a constant pH of 8.1 and to prevent formation of pseudo-\ncolloids during the addition of spikes. For the single-sorbent experiments, 2\nmg of inorganic particles was added into the solution while stirring,\ncorresponding to a particle concentration of about 40 mg/l. Successively, a\ntotal of 0.2 ml of 210Pb, 210Pb and 7Be spikes, with the activities of 100 Bq,\n100 Bq and 150 Bq respectively, were added drop by drop while stirring.\\u00a0\nThe pH value was checked after adding spikes and found to be 8.1. For the\nsingle MOC experiments, procedures were the same as described above. The final\nconcentration of HA, APS or BSA was at 1 mg/l.\\u00a0\n \nAn equilibrium time of 2 h was consistently used in all experiments. After 2\nh, the particulate or colloidal phases were separated through ultrafiltration\nusing a 1 kDa membrane (Amicon YM1). The >1 kDa retentate (final volume of ~4\nml) and aliquot of the <1 kDa ultrafiltrate or permeate solutions (10 ml) were\ntransferred into a counting vial for \\u03b3-counting.  \n For the binary-sorbent experiments, macromolecular organic matter was added\nafter the inorganic nanoparticles. The experimental solution was then stirred\nfor 30 min to allow inorganic particles to interact with MOCs. After that,\nspikes were added. Other experimental procedures were the same as the single-\nsorbent experiments.\n \nRetentate and permeate samples were measured for 210Pb and 7Be by non-\ndestructive gamma counting using a Canberra ultra-high purity germanium well\ndetector. The counting efficiencies at different sample geometries (1-10 ml)\nat 46.5 keV for 210Pb and 477.6 keV for 7Be were calibrated using tracers with\ncertified activities.\\u00a0\n \nThe activities of 210Po in samples were measured using \\u03b1-spectrometry.\nFor the permeate samples, 5 ml of permeate was acidified to pH <1.5 with HCl,\nthen\\u00a0 4 Bq 209Po was added, followed by ascorbic acid powder, 1 ml of\nhydroxylamine hydrochloride (20%) and 1 ml of sodium citrate (25%).\\u00a0\nFinally, the mixed solution was adjusted to a pH of 1.5. Polonium isotopes,\nincluding 209Po and 210Po, were plated on a silver disc at 90\\u00baC for 4 h\nunder stirring. Procedures for the retentate samples were the same, except\nthat the retentate was digested with mixed acids. Then, the solution was dried\nto near dryness.\\u00a0\n \n\\u00a0Activities of 209Po and 210Po on silver disc were counted by a Canberra\nalpha analyst system. The procedural efficiencies of Po isotopes were\ndetermined by the measured 209Po and initially added 209Po activities.
attribute NC_GLOBAL awards_0_award_nid String 735995
attribute NC_GLOBAL awards_0_award_number String OCE-1356453
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1356453 (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 Henrietta N Edmonds
attribute NC_GLOBAL awards_0_program_manager_nid String 51517
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Po, Pb and Be partition coefficients on nanoparticles \n  PI: Peter Santschi \n  Version: 2018-05-14
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 date_created String 2018-06-15T20:13:12Z
attribute NC_GLOBAL date_modified String 2019-09-24T20:07:28Z
attribute NC_GLOBAL defaultDataQuery String &amp;time&lt;now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.738639.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/738639 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Spectrometer
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Alpha-spectrometry, Canberra corporation.
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 738649
attribute NC_GLOBAL instruments_0_description String A spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L22/current/TOOL0460/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Spectrometer
attribute NC_GLOBAL instruments_0_instrument_nid String 667
attribute NC_GLOBAL instruments_0_supplied_name String Alpha-spectrometry
attribute NC_GLOBAL instruments_1_dataset_instrument_description String Canberra ultra-high purity germanium well detector.
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 738648
attribute NC_GLOBAL instruments_1_description String Instruments measuring the relative levels of electromagnetic radiation of different wavelengths in the gamma-ray waveband.
attribute NC_GLOBAL instruments_1_instrument_name String Gamma Ray Spectrometer
attribute NC_GLOBAL instruments_1_instrument_nid String 670659
attribute NC_GLOBAL instruments_1_supplied_name String Gamma-spectrometry
attribute NC_GLOBAL keywords String bco, bco-dmo, be7, Be7_recovery, berec, biological, chemical, coefficient, data, dataset, dmo, erddap, err_Berec, err_Kc_Be, err_Kc_Pb, err_Kc_Po, err_Pbrec, err_Porec, error, inorganic, Inorganic_nanoparticle, management, nanoparticle, oceanography, office, organic, Organic_nanoparticle, partition, Partition_coefficient_of_210Pb_Kc, Partition_coefficient_of_210Po_Kc, Partition_coefficient_of_7Be_Kc, pb210, Pb210_recovery, pbrec, po210, Po210_recovery, porec, preliminary, recovery, system
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/738639/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/738639 (external link)
attribute NC_GLOBAL param_mapping String {'738639': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/738639/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Texas A&M, Galveston
attribute NC_GLOBAL people_0_affiliation_acronym String TAMUG
attribute NC_GLOBAL people_0_person_name String Peter Santschi
attribute NC_GLOBAL people_0_person_nid String 735998
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 Texas A&M, Galveston
attribute NC_GLOBAL people_1_affiliation_acronym String TAMUG
attribute NC_GLOBAL people_1_person_name String Antonietta Quigg
attribute NC_GLOBAL people_1_person_nid String 736000
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 Texas A&M, Galveston
attribute NC_GLOBAL people_2_affiliation_acronym String TAMUG
attribute NC_GLOBAL people_2_person_name String Kathleen Schwehr
attribute NC_GLOBAL people_2_person_nid String 736002
attribute NC_GLOBAL people_2_role String Co-Principal Investigator
attribute NC_GLOBAL people_2_role_type String originator
attribute NC_GLOBAL people_3_affiliation String Texas A&M, Galveston
attribute NC_GLOBAL people_3_affiliation_acronym String TAMUG
attribute NC_GLOBAL people_3_person_name String Chen Xu
attribute NC_GLOBAL people_3_person_nid String 736004
attribute NC_GLOBAL people_3_role String Co-Principal Investigator
attribute NC_GLOBAL people_3_role_type String originator
attribute NC_GLOBAL people_4_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_4_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_4_person_name String Mathew Biddle
attribute NC_GLOBAL people_4_person_nid String 708682
attribute NC_GLOBAL people_4_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_4_role_type String related
attribute NC_GLOBAL project String Biopolymers for radionuclides
attribute NC_GLOBAL projects_0_acronym String Biopolymers for radionuclides
attribute NC_GLOBAL projects_0_description String NSF Award Abstract:\nParticle-associated natural radioisotopes are transported to the ocean floor mostly via silica and carbonate ballasted particles, allowing their use as tracers for particle transport. Th(IV), Pa (IV,V), Po(IV), Pb(II) and Be(II) radionuclides are important proxies in oceanographic investigations, used for tracing particle and colloid cycling, estimating export fluxes of particulate organic carbon, tracing air-sea exchange, paleoproductivity, and/or ocean circulation in paleoceanographic studies. Even though tracer approaches are considered routine, there are cases where data interpretation or validity has become controversial, largely due to uncertainties about inorganic proxies and organic carrier molecules. Recent studies showed that cleaned diatom frustules and pure silica particles, sorb natural radionuclides to a much lower extent (by 1-2 orders of magnitude) than whole diatom cells (with or without shells). Phytoplankton that build siliceous or calcareous shells, such as the diatoms and coccolithophores, are assembled via bio-mineralization processes using biopolymers as nanoscale templates. These templates could serve as possible carriers for radionuclides and stable metals.\nIn this project, a research team at the Texas A & M University at Galveston hypothesize that radionuclide sorption is controlled by selective biopolymers that are associated with biogenic opal (diatoms), CaCO3 (coccolithophores) and the attached exopolymeric substances (EPS), rather than to pure mineral phase. To pursue this idea, the major objectives of their research will include separation, identification and molecular-level characterization of the individual biopolymers (e.g., polysaccharides, uronic acids, proteins, hydroquinones, hydroxamate siderophores, etc.) that are responsible for binding different radionuclides (Th, Pa, Pb, Po and Be) attached to cells or in the matrix of biogenic opal or CaCO3 as well as attached EPS mixture, in laboratory grown diatom and coccolithophore cultures. Laboratory-scale radiolabeling experiments will be conducted, and different separation techniques and characterization techniques will be applied.\nIntellectual Merit : It is expected that this study will help elucidate the molecular basis of the templated growth of diatoms and coccoliths, EPS and their role in scavenging natural radionuclides in the ocean, and help resolve debates on the oceanographic tracer applications of different natural radioisotopes (230,234Th, 231Pa, 210Po, 210Pb and 7,10Be). The proposed interdisciplinary research project will require instrumental approaches for molecular-level characterization of these radionuclides associated carrier molecules.\nBroader Impacts: The results of this study will be relevant for understanding biologically mediated ocean scavenging of radionuclides by diatoms and coccoliths which is important for carbon cycling in the ocean, and will contribute to improved interpretation of data obtained by field studies especially through the GEOTRACES program. This new program will enhance training programs at TAMUG for postdocs, graduate and undergraduate students. Lastly, results will be integrated in college courses and out-reach activities at Texas A&M University, including NSF-REU, Sea Camp, Elder Hostel and exhibits at the local science fair and interaction with its after-school program engaging Grade 9-12 students from groups traditionally underrepresented.
attribute NC_GLOBAL projects_0_end_date String 2018-02
attribute NC_GLOBAL projects_0_name String Biopolymers as carrier phases for selected natural radionuclides (of Th, Pa, Pb, Po, Be) in diatoms and coccolithophores
attribute NC_GLOBAL projects_0_project_nid String 735996
attribute NC_GLOBAL projects_0_start_date String 2014-03
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 Laboratory sorption experiments were carried out to examine the adsorption of 210Po, 210Pb and 7Be and their fractionation on inorganic nanoparticles, including SiO2,CaCO3, Al2O3, TiO2 and Fe2O3, in the presence or absence of macromolecular organic compounds (MOCs) that include humic acids (HA), acid polysaccharides (APS) and proteins (BSA), in natural seawater.
attribute NC_GLOBAL title String [Recoveries and partition coefficients] - Po, Pb and Be partition coefficients on nanoparticles from laboratory experiments (Biopolymers as carrier phases for selected natural radionuclides (of Th, Pa, Pb, Po, Be) in diatoms and coccolithophores)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable System String
attribute System bcodmo_name String sample_descrip
attribute System description String Type of sorption experiment.
attribute System long_name String System
attribute System units String unitless
variable Organic_nanoparticle String
attribute Organic_nanoparticle bcodmo_name String sample_descrip
attribute Organic_nanoparticle description String organic nanoparticle in solution.
attribute Organic_nanoparticle long_name String Organic Nanoparticle
attribute Organic_nanoparticle units String unitless
variable Inorganic_nanoparticle String
attribute Inorganic_nanoparticle bcodmo_name String sample_descrip
attribute Inorganic_nanoparticle description String inorganic nanoparticle in solution.
attribute Inorganic_nanoparticle long_name String Inorganic Nanoparticle
attribute Inorganic_nanoparticle units String unitless
variable Pb210_recovery byte
attribute Pb210_recovery _FillValue byte 127
attribute Pb210_recovery actual_range byte 80, 96
attribute Pb210_recovery bcodmo_name String trace_metal_conc
attribute Pb210_recovery description String Chemical recovery of 210Pb in percent (%)
attribute Pb210_recovery long_name String Pb210 Recovery
attribute Pb210_recovery nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute Pb210_recovery units String unitless
variable err_Pbrec byte
attribute err_Pbrec _FillValue byte 127
attribute err_Pbrec actual_range byte 1, 6
attribute err_Pbrec bcodmo_name String trace_metal_conc
attribute err_Pbrec description String Error of chemical recovery of 210Pb in percent (%)
attribute err_Pbrec long_name String Err Pbrec
attribute err_Pbrec nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute err_Pbrec units String unitless
variable Be7_recovery byte
attribute Be7_recovery _FillValue byte 127
attribute Be7_recovery actual_range byte 87, 108
attribute Be7_recovery bcodmo_name String trace_metal_conc
attribute Be7_recovery description String Chemical recovery of 7Be in percent (%)
attribute Be7_recovery long_name String Be7 Recovery
attribute Be7_recovery nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute Be7_recovery units String unitless
variable err_Berec byte
attribute err_Berec _FillValue byte 127
attribute err_Berec actual_range byte 2, 4
attribute err_Berec bcodmo_name String trace_metal_conc
attribute err_Berec description String Error of chemical recovery of 7Be in percent (%)
attribute err_Berec long_name String Err Berec
attribute err_Berec nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute err_Berec units String unitless
variable Po210_recovery byte
attribute Po210_recovery _FillValue byte 127
attribute Po210_recovery actual_range byte 75, 89
attribute Po210_recovery bcodmo_name String trace_metal_conc
attribute Po210_recovery description String Chemical recovery of 210Po in percent (%)
attribute Po210_recovery long_name String Po210 Recovery
attribute Po210_recovery nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute Po210_recovery units String unitless
variable err_Porec byte
attribute err_Porec _FillValue byte 127
attribute err_Porec actual_range byte 7, 12
attribute err_Porec bcodmo_name String trace_metal_conc
attribute err_Porec description String Error of chemical recovery of 210Po in percent (%)
attribute err_Porec long_name String Err Porec
attribute err_Porec nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute err_Porec units String unitless
variable Partition_coefficient_of_210Pb_Kc float
attribute Partition_coefficient_of_210Pb_Kc _FillValue float NaN
attribute Partition_coefficient_of_210Pb_Kc actual_range float 0.48, 1555.7
attribute Partition_coefficient_of_210Pb_Kc bcodmo_name String trace_metal_conc
attribute Partition_coefficient_of_210Pb_Kc description String The partition coefficient of 210Pb between true solution (
attribute Partition_coefficient_of_210Pb_Kc long_name String Partition Coefficient Of 210 Pb Kc
attribute Partition_coefficient_of_210Pb_Kc nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute Partition_coefficient_of_210Pb_Kc units String 10^4 Liters per Kilogram (L/kg)
variable err_Kc_Pb float
attribute err_Kc_Pb _FillValue float NaN
attribute err_Kc_Pb actual_range float 0.04, 148.08
attribute err_Kc_Pb bcodmo_name String trace_metal_conc
attribute err_Kc_Pb description String Error of the partition coefficient of 210Pb between true solution (
attribute err_Kc_Pb long_name String Err Kc Pb
attribute err_Kc_Pb nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute err_Kc_Pb units String 10^4 Liters per Kilogram (L/kg)
variable Partition_coefficient_of_7Be_Kc float
attribute Partition_coefficient_of_7Be_Kc _FillValue float NaN
attribute Partition_coefficient_of_7Be_Kc actual_range float 0.11, 175.85
attribute Partition_coefficient_of_7Be_Kc bcodmo_name String trace_metal_conc
attribute Partition_coefficient_of_7Be_Kc description String The partition coefficient of 7Be between true solution (
attribute Partition_coefficient_of_7Be_Kc long_name String Partition Coefficient Of 7 Be Kc
attribute Partition_coefficient_of_7Be_Kc nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute Partition_coefficient_of_7Be_Kc units String 10^4 Liters per Kilogram (L/kg)
variable err_Kc_Be float
attribute err_Kc_Be _FillValue float NaN
attribute err_Kc_Be actual_range float 0.03, 16.8
attribute err_Kc_Be bcodmo_name String trace_metal_conc
attribute err_Kc_Be description String Error of the partition coefficient of 7Be between true solution (
attribute err_Kc_Be long_name String Err Kc Be
attribute err_Kc_Be nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute err_Kc_Be units String 10^4 Liters per Kilogram (L/kg)
variable Partition_coefficient_of_210Po_Kc float
attribute Partition_coefficient_of_210Po_Kc _FillValue float NaN
attribute Partition_coefficient_of_210Po_Kc actual_range float 0.42, 22.38
attribute Partition_coefficient_of_210Po_Kc bcodmo_name String trace_metal_conc
attribute Partition_coefficient_of_210Po_Kc description String The partition coefficient of 210Po between true solution (
attribute Partition_coefficient_of_210Po_Kc long_name String Partition Coefficient Of 210 Po Kc
attribute Partition_coefficient_of_210Po_Kc nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute Partition_coefficient_of_210Po_Kc units String 10^4 Liters per Kilogram (L/kg)
variable err_Kc_Po float
attribute err_Kc_Po _FillValue float NaN
attribute err_Kc_Po actual_range float 0.04, 1.51
attribute err_Kc_Po bcodmo_name String trace_metal_conc
attribute err_Kc_Po description String Error of the partition coefficient of 210Po between true solution (
attribute err_Kc_Po long_name String Err Kc Po
attribute err_Kc_Po nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/C035/ (external link)
attribute err_Kc_Po units String 10^4 Liters per Kilogram (L/kg)

 
ERDDAP, Version 2.22
Disclaimers | Privacy Policy | Contact