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 Crystallization experiment  \n In order to simulate the high-pressure conditions at the seafloor, three\nlaboratory experiments involving aragonite precipitation were conducted.\\u00a0\nTwo experiments were conducted using a high-pressure apparatus (Figure 1). The\ncontrol experiment was performed at atmospheric pressure and 8\\u00b0C in a\ncontainer immersed in a constant temperature bath. The experimental fluid\n(growth medium) was prepared by mixing artificial seawater (ASW) and small\naliquots of Na2CO3. The addition of Na2CO3 allowed the saturation state of the\nfluid with respect to aragonite to be increased, in order to promote\nnucleation and crystallization on carbonate minerals. Artificial seawater was\nprepared by dissolving 32 g of Instant Ocean salt (Instant Ocean Spectrum\nBrands) mix in 1 kg of distilled water and filtering it through a 0.2 \\u00b5m\nNalgene filter. A small amount of 0.1M Na2CO3 was then introduced into the\ncontinuously stirred artificial seawater using a syringe pump set at a rate of\n~1 ml/min, to reach a final volume ratio of Na2CO3 to artificial seawater of\n~1:13. During the addition of Na2CO3, the solution was in contact with the\natmosphere. This procedure homogenized the fluid and also precluded aragonite\nnucleation prior to the beginning of the experiment. The absence of crystal\nnucleation was confirmed visually by monitoring the solution pH, which\nremained stable for the 1-2 hours needed for the experiment setup. The\nobservation that aragonite crystallization did not start prior to the\nbeginning of the experiment is consistent with previously published data,\nwhich show that 6 hours elapsed before onset of crystallization in the\nsolution similar to the one we used (7.4 mmol of Na2CO3 :1 liter of seawater)\n(Pytkowicz, 1965).\n \nPetrographic glass slides frosted with silicon carbide (SiC) abrasive paper\nwere used to promote aragonite crystallization along scratches. For each\nexperiment, one slide was placed into the high-pressure vessel prior to the\ntransfer of the experimental fluid. The experimental fluid was then placed\ninto the vessel after it was precooled to 8\\u00b0C. After that, the air space\nabove the solution (<200 cm3) was purged with nitrogen three times before the\npressure was increased to a desired value (110 or 345 bars). The experimental\nfluid was sampled daily using a valve on the pressure vessel (Figure 1) and pH\nwas measured to estimate time of nucleation and crystallization of CaCO3. For\npH measurements, electrode calibration and measurements were conducted at\ntemperatures similar to those of the experiment. NBS buffer solutions with pH\nof 4, 7, and 10 were used for electrode calibration. The pH initially\ndecreased due to carbonate precipitation and reached near-constant values less\nthan 170 hrs from the beginning of the experiments, suggesting that most of\nthe CaCO3 precipitated in the first few days of each experiment. At the end of\neach run, the experimental products were extracted from the pressure vessel.\nCrystals (<10 \\u00b5m in size) were rinsed with distilled water and dried,\nwhereas the experimental fluid was filtered and refrigerated for subsequent\nelemental analyses. The alkalinity of the final fluid was measured the day\nafter the end of each experiment. Experimental parameters are presented in\nTable -1.
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 carbonate chemistry \n   Table 1. Experimental conditions and fluid carbonate chemistry for RPI-3 run where only aragonite precipitated. \n   PI: R. Gabitov (MSU) \n   version date: 2020-03-25
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 2020-03-25T18:18:13Z
attribute NC_GLOBAL date_modified String 2020-04-08T14:29:01Z
attribute NC_GLOBAL defaultDataQuery String &amp;time&lt;now
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.806920.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/806920 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String unknown
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Custom designed pressure chamber used to simulate the high-pressure conditions at the seafloor for this set of experiments.(designed at Rensselaer Polytech Institute, Department of Earth and Environmental Sciences)
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 806942
attribute NC_GLOBAL instruments_0_description String No relevant match in BCO-DMO instrument vocabulary.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/999/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String unknown
attribute NC_GLOBAL instruments_0_instrument_nid String 575
attribute NC_GLOBAL instruments_0_supplied_name String high-pressure apparatus
attribute NC_GLOBAL instruments_1_acronym String Benchtop pH Meter
attribute NC_GLOBAL instruments_1_dataset_instrument_description String Used to measure pH.
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 806943
attribute NC_GLOBAL instruments_1_description String An instrument consisting of an electronic voltmeter and pH-responsive electrode that gives a direct conversion of voltage differences to differences of pH at the measurement temperature.  (McGraw-Hill Dictionary of Scientific and Technical Terms) \nThis instrument does not map to the NERC instrument vocabulary term for 'pH Sensor' which measures values in the water column.  Benchtop models are typically employed for stationary lab applications.
attribute NC_GLOBAL instruments_1_instrument_name String Benchtop pH Meter
attribute NC_GLOBAL instruments_1_instrument_nid String 681
attribute NC_GLOBAL instruments_2_dataset_instrument_description String Used to measure concentrations of ions.
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 806944
attribute NC_GLOBAL instruments_2_description String Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.
attribute NC_GLOBAL instruments_2_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB01/ (external link)
attribute NC_GLOBAL instruments_2_instrument_name String Elemental Analyzer
attribute NC_GLOBAL instruments_2_instrument_nid String 546339
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, calc, carbonate, chemical, co3, data, dataset, dmo, erddap, fluid, management, meas, oceanography, office, OM_ar, pH_calc, pH_meas, preliminary, press, temperature
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/806920/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/806920 (external link)
attribute NC_GLOBAL param_mapping String {'806920': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/806920/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Mississippi State University
attribute NC_GLOBAL people_0_affiliation_acronym String MSU
attribute NC_GLOBAL people_0_person_name String Rinat Gabitov
attribute NC_GLOBAL people_0_person_nid String 743432
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 Rochester
attribute NC_GLOBAL people_1_person_name String Chiara Borrelli
attribute NC_GLOBAL people_1_person_nid String 743434
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 Rensselaer Polytechnic Institute
attribute NC_GLOBAL people_2_affiliation_acronym String RPI
attribute NC_GLOBAL people_2_person_name String Karyn Rogers
attribute NC_GLOBAL people_2_person_nid String 661573
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 Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Nancy Copley
attribute NC_GLOBAL people_3_person_nid String 50396
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String Deep Sea Geochem CaCO3
attribute NC_GLOBAL projects_0_acronym String Deep Sea Geochem CaCO3
attribute NC_GLOBAL projects_0_description String Biologically-mediated CaCO3 precipitation widely occurs in aquatic systems and is often directly linked to the metabolic activity of microorganisms, which could significantly affect the local environment. An example is oxidation of methane and reduction of sulfate mediated by a consortium of Bacteria and Archaea. In order to investigate geochemistry of CaCO3precipitated abiotically and under microbial activity experimental work was initiated.  The abiotic experiments were performed at different temperatures and pressures (nitrogen and nitrogen-methane mixture).  Further geochemical analyses will allow evaluating of the effect of total pressure and methane partial pressure on the geochemistry of CaCO3. Sulfate reducing bacterial (Desulfovibrio salexigens) was successfully cultured and precipitation experiments on microbially mediated CaCO3 are in progress. This work is relevant to C-DEBI Research Theme I (Activity in the Deep Subseafloor Biosphere: function & rates of global biogeochemical processes) because carbonate growth rate is linked to microbial activity and the rate of methane oxidation.
attribute NC_GLOBAL projects_0_end_date String 2014-09
attribute NC_GLOBAL projects_0_name String Biologically induced methane oxidation and precipitation of carbonate minerals: An experimental study
attribute NC_GLOBAL projects_0_project_nid String 743426
attribute NC_GLOBAL projects_0_project_website String https://www.darkenergybiosphere.org/award/biologically-induced-methane-oxidation-and-precipitation-of-carbonate-minerals-an-experimental-study/ (external link)
attribute NC_GLOBAL projects_0_start_date String 2014-05
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 Table 1: Experimental conditions and fluid carbonate chemistry for RPI-3 run where only aragonite precipitated.
attribute NC_GLOBAL title String [carbonate chemistry] - Table 1: Experimental conditions and fluid carbonate chemistry for RPI-3 run where only aragonite precipitated (Biologically induced methane oxidation and precipitation of carbonate minerals: An experimental study)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable fluid String
attribute fluid bcodmo_name String treatment
attribute fluid description String exprimental fluid (growth medium): ASW= artificial seawater; initial= artificial seawater doped with aliquot 0.1M Na2CO3 in the proportion of ~1:13 to ASW; final= fluid at end of experiment
attribute fluid long_name String Fluid
attribute fluid units String unitless
variable temp byte
attribute temp _FillValue byte 127
attribute temp actual_range byte 8, 22
attribute temp bcodmo_name String temperature
attribute temp description String temperature
attribute temp long_name String Temperature
attribute temp nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/ (external link)
attribute temp units String degrees Celsius
variable press byte
attribute press _FillValue byte 127
attribute press actual_range byte 1, 110
attribute press bcodmo_name String pressure
attribute press description String pressure
attribute press long_name String Press
attribute press nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/PRESPR01/ (external link)
attribute press units String bars
variable S float
attribute S _FillValue float NaN
attribute S actual_range float 23.06, 24.12
attribute S bcodmo_name String sal
attribute S description String salinity
attribute S long_name String S
attribute S nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/ (external link)
attribute S units String salinity units
variable TA short
attribute TA _FillValue short 32767
attribute TA actual_range short 2698, 9905
attribute TA bcodmo_name String TALK
attribute TA description String total alkalinity
attribute TA long_name String TA
attribute TA nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/MDMAP014/ (external link)
attribute TA units String micromole per kg of water
variable pH_meas float
attribute pH_meas _FillValue float NaN
attribute pH_meas actual_range float 8.05, 9.56
attribute pH_meas bcodmo_name String pH
attribute pH_meas description String pH measured
attribute pH_meas long_name String P H Meas
attribute pH_meas nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/PHXXZZXX/ (external link)
attribute pH_meas units String pH units
variable pH_calc float
attribute pH_calc _FillValue float NaN
attribute pH_calc actual_range float 8.2, 9.63
attribute pH_calc bcodmo_name String pH
attribute pH_calc description String pH calculated
attribute pH_calc long_name String P H Calc
attribute pH_calc nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/PHXXZZXX/ (external link)
attribute pH_calc units String pH units
variable CO3 float
attribute CO3 _FillValue float NaN
attribute CO3 actual_range float 135.6, 3591.0
attribute CO3 bcodmo_name String carbonate
attribute CO3 description String carbonate ion
attribute CO3 long_name String CO3
attribute CO3 units String micromole per kg of water
variable Ca float
attribute Ca _FillValue float NaN
attribute Ca actual_range float 71.43, 329.7
attribute Ca bcodmo_name String Ca
attribute Ca description String calcium ion
attribute Ca long_name String Ca
attribute Ca units String milligram per kg of water
variable OM_ar float
attribute OM_ar _FillValue float NaN
attribute OM_ar actual_range float 2.0, 51.42
attribute OM_ar bcodmo_name String OM_ar
attribute OM_ar description String saturation state of the fluid with respect to aragonite
attribute OM_ar long_name String OM Ar
attribute OM_ar units String unitless

 
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