ERDDAP > info > bcodmo_dataset_806920

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	Table 1: Experimental conditions and fluid carbonate chemistry for RPI-3 run where only aragonite precipitated		I   M	background			BCO-DMO	bcodmo_dataset_806920

The Dataset's Variables and Attributes

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 In order to simulate the high-pressure conditions at the seafloor, three laboratory experiments involving aragonite precipitation were conducted.\u00a0 Two experiments were conducted using a high-pressure apparatus (Figure 1). The control experiment was performed at atmospheric pressure and 8\u00b0C in a container immersed in a constant temperature bath. The experimental fluid (growth medium) was prepared by mixing artificial seawater (ASW) and small aliquots of Na2CO3. The addition of Na2CO3 allowed the saturation state of the fluid with respect to aragonite to be increased, in order to promote nucleation and crystallization on carbonate minerals. Artificial seawater was prepared by dissolving 32 g of Instant Ocean salt (Instant Ocean Spectrum Brands) mix in 1 kg of distilled water and filtering it through a 0.2 \u00b5m Nalgene filter. A small amount of 0.1M Na2CO3 was then introduced into the continuously stirred artificial seawater using a syringe pump set at a rate of ~1 ml/min, to reach a final volume ratio of Na2CO3 to artificial seawater of ~1:13. During the addition of Na2CO3, the solution was in contact with the atmosphere. This procedure homogenized the fluid and also precluded aragonite nucleation prior to the beginning of the experiment. The absence of crystal nucleation was confirmed visually by monitoring the solution pH, which remained stable for the 1-2 hours needed for the experiment setup. The observation that aragonite crystallization did not start prior to the beginning of the experiment is consistent with previously published data, which show that 6 hours elapsed before onset of crystallization in the solution similar to the one we used (7.4 mmol of Na2CO3 :1 liter of seawater) (Pytkowicz, 1965). Petrographic glass slides frosted with silicon carbide (SiC) abrasive paper were used to promote aragonite crystallization along scratches. For each experiment, one slide was placed into the high-pressure vessel prior to the transfer of the experimental fluid. The experimental fluid was then placed into the vessel after it was precooled to 8\u00b0C. After that, the air space above the solution (<200 cm3) was purged with nitrogen three times before the pressure was increased to a desired value (110 or 345 bars). The experimental fluid was sampled daily using a valve on the pressure vessel (Figure 1) and pH was measured to estimate time of nucleation and crystallization of CaCO3. For pH measurements, electrode calibration and measurements were conducted at temperatures similar to those of the experiment. NBS buffer solutions with pH of 4, 7, and 10 were used for electrode calibration. The pH initially decreased due to carbonate precipitation and reached near-constant values less than 170 hrs from the beginning of the experiments, suggesting that most of the CaCO3 precipitated in the first few days of each experiment. At the end of each run, the experimental products were extracted from the pressure vessel. Crystals (<10 \u00b5m in size) were rinsed with distilled water and dried, whereas the experimental fluid was filtered and refrigerated for subsequent elemental analyses. The alkalinity of the final fluid was measured the day after the end of each experiment. Experimental parameters are presented in Table -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
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 Table 1. Experimental conditions and fluid carbonate chemistry for RPI-3 run where only aragonite precipitated. PI: R. Gabitov (MSU) 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/
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
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/
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) This 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/
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
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/806920
attribute	NC_GLOBAL	param_mapping	String	{'806920': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/806920/parameters
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/
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	Table 1: Experimental conditions and fluid carbonate chemistry for RPI-3 run where only aragonite precipitated
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/
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/
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/
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/
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/
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/
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

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.