ERDDAP > info > bcodmo_dataset_786268

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
	set	data	graph		files	public	[Pore Water Depth Profiles CL2015] - Sediment pore water and solid phase geochemical analyses from samples collected on R/V Savannah cruise SAV-15-18 at the Cape Lookout Continental Shelf and Slope during July 2015 (Source, Composition, and Stability of Soluble Iron Fluxing from Continental Margin Sediments)		F   I   M	background			BCO-DMO	bcodmo_dataset_786268

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,.esriCsv,.geoJson
attribute	NC_GLOBAL	acquisition_description	String	Sediments were collected and profiled immediately with voltammetric Hg/Au microelectrodes deployed on a computer-controlled micromanipulator (Beckler et al., 2016). Sediment pore waters were then extracted from the same core and either preserved until analysis or analyzed immediately onboard ship. Sampling and analyses were conducted immediately after sediment collection to minimize artifacts from exposure to the atmosphere. Sediment cores were obtained by a MC-800 multi-corer and profiled within 30 minutes with voltammetric Hg/Au microelectrodes deployed on a computer- controlled micromanipulator. After profiling, sediments were immediately sliced under N\u2082 atmosphere and pore waters extracted by centrifugation at 3000 rpm under N\u2082 atmosphere. Finally, pore waters were immediately filtered (0.2 \u00b5M PSE Puradisc syringe filters, Whatman) under N\u2082 atmosphere and either preserved at -20C until analysis (SO\u2084\u00b2\u207b), dispensed directly into reagents for analysis (SPO\u2084\u00b3\u207b), or analyzed immediately (DIC). SO\u2084\u00b2\u207b was measured by non- suppressed HPLC with UV detection (Beckler et al., 2014). SPO\u2084\u00b3\u207b was measured spectrophotometrically using the molybdate- blue method after natural color correction to avoid interferences from dissolved silica and sulfides (Murphy and Riley, 1962). Finally, DIC was measured by flow injection analysis with conductivity detection after spiking samples with 10 mM ZnCl\u2082 to prevent dissolved sulfide interferences (Hall and Aller, 1992). All errors reported for the electrochemical measurements represent the standard deviation of at least triplicate measurements. Errors of all other parameters represent the analytical error propagated from calibration curves, dilution, and instrumental drift. Problem report: Some of the data are missing because pore water volumes were too low to make all the measurements.
attribute	NC_GLOBAL	awards_0_award_nid	String	743718
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1438648
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1438648
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	SAV-15-18 (CL2015) Sediment Porewater Depth Profiles PI: Martial Taillefert Version date: 2020-Jan-21
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	2020-01-07T20:49:25Z
attribute	NC_GLOBAL	date_modified	String	2020-01-21T19:37:36Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.786268.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-75.806
attribute	NC_GLOBAL	geospatial_lat_max	double	34.266
attribute	NC_GLOBAL	geospatial_lat_min	double	33.8715
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-75.806
attribute	NC_GLOBAL	geospatial_lon_min	double	-76.4343
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/786268
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	HPLC
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	SO42- was measured by non-suppressed HPLC with UV detection.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	786482
attribute	NC_GLOBAL	instruments_0_description	String	A High-performance liquid chromatograph (HPLC) is a type of liquid chromatography used to separate compounds that are dissolved in solution. HPLC instruments consist of a reservoir of the mobile phase, a pump, an injector, a separation column, and a detector. Compounds are separated by high pressure pumping of the sample mixture onto a column packed with microspheres coated with the stationary phase. The different components in the mixture pass through the column at different rates due to differences in their partitioning behavior between the mobile liquid phase and the stationary phase.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB11/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	High Performance Liquid Chromatograph
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	506
attribute	NC_GLOBAL	instruments_0_supplied_name	String	HPLC
attribute	NC_GLOBAL	instruments_1_acronym	String	Multi Corer
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	Sediment cores were obtained by a MC-800 multi-corer.
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	786481
attribute	NC_GLOBAL	instruments_1_description	String	The Multi Corer is a benthic coring device used to collect multiple, simultaneous, undisturbed sediment/water samples from the seafloor. Multiple coring tubes with varying sampling capacity depending on tube dimensions are mounted in a frame designed to sample the deep ocean seafloor. For more information, see Barnett et al. (1984) in Oceanologica Acta, 7, pp. 399-408.
attribute	NC_GLOBAL	instruments_1_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/51/
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Multi Corer
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	532
attribute	NC_GLOBAL	instruments_1_supplied_name	String	MC-800 multi-corer
attribute	NC_GLOBAL	instruments_2_acronym	String	FIA
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	DIC was measured by flow injection analysis with peristaltic pump (Gilson), conductivity detector (Fisher Scientific), and integrator with LC-100 software (Analytical Systems, Inc.).
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	786484
attribute	NC_GLOBAL	instruments_2_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_2_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB36/
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Flow Injection Analyzer
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	657
attribute	NC_GLOBAL	instruments_3_acronym	String	Spectrophotometer
attribute	NC_GLOBAL	instruments_3_dataset_instrument_description	String	PO43- was measured spectrophotometrically.
attribute	NC_GLOBAL	instruments_3_dataset_instrument_nid	String	786483
attribute	NC_GLOBAL	instruments_3_description	String	An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.
attribute	NC_GLOBAL	instruments_3_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB20/
attribute	NC_GLOBAL	instruments_3_instrument_name	String	Spectrophotometer
attribute	NC_GLOBAL	instruments_3_instrument_nid	String	707
attribute	NC_GLOBAL	instruments_3_supplied_name	String	Spectrophotometer Thermofisher
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, chemical, chemistry, collection, Collection_Type, concentration, data, dataset, date, day, depth, dic, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Phosphate, erddap, latitude, longitude, management, mass, mass_concentration_of_phosphate_in_sea_water, month, ocean, oceanography, oceans, office, phosphate, po4, preliminary, sample, sample_ID, science, sdDIC, sdPO4, sdSO4, sea, seawater, sediment, Sediment_depth, so4, station, type, water, year
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/786268/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/786268
attribute	NC_GLOBAL	Northernmost_Northing	double	34.266
attribute	NC_GLOBAL	param_mapping	String	{'786268': {'Lat': 'flag - latitude', 'Sediment_depth': 'flag - depth', 'Lon': 'flag - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/786268/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Georgia Institute of Technology
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	Georgia Tech
attribute	NC_GLOBAL	people_0_person_name	String	Martial Taillefert
attribute	NC_GLOBAL	people_0_person_nid	String	743721
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	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_1_person_name	String	Shannon Rauch
attribute	NC_GLOBAL	people_1_person_nid	String	51498
attribute	NC_GLOBAL	people_1_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_1_role_type	String	related
attribute	NC_GLOBAL	project	String	Soluble Fe Fluxing
attribute	NC_GLOBAL	projects_0_acronym	String	Soluble Fe Fluxing
attribute	NC_GLOBAL	projects_0_description	String	NSF Award Abstract: Iron is a limiting nutrient in the world's oceans and plays a key role in regulating the growth of phytoplankton. The main sources of iron to the open ocean are the atmosphere, through wind-blown terrestrial dust, and the seafloor, through input from continental shelf sediments. While atmospheric inputs have been well-studied, the oceanic input of iron from sediments has only sparsely been measured and, as a result, the relative importance of the sediment-derived iron to the iron pool and, ultimately, primary productivity in the oceans is poorly understood. In this study, researchers will examine the chemical properties of sediment-derived iron in the oceans to assess its contribution to the iron used by phytoplankton. Results from this study will further our understanding of iron inputs to the ocean and their importance to ocean primary productivity. The project will contribute to the training of graduate students, as well as provide educational opportunities such as a day at sea for undergraduate students in engineering and physical science. The atmosphere and continental margin sediments are the main source of the limiting nutrient iron (Fe) to the open ocean. Yet, the chemical form of iron from sediments has not been well examined and only quantified as reduced iron or the dissolved iron passing through 0.45 µm filters. The kinetics of iron oxygenation suggests it should precipitate rapidly in the overlying waters, challenging the view that sediments are important sources of iron for primary production. To establish whether the flux of iron from sediments has important implications for primary productivity, possibly rivaling atmospheric inputs, it is necessary to demonstrate that ferric iron originating in sediments is under the form of stable iron species with potential for a high residence time in the water column. The overall objective of this project is to test the hypotheses that iron fluxing across the sediment-water interface in continental margin sediments is dissolved under the form of organic-Fe(III) complexes and that the magnitude of the iron flux is influenced by the redox conditions in the overlying waters, the composition of the complexes, and the biogeochemical processes in the underlying sediments. To test these hypotheses, the flux and speciation of dissolved Fe(III) will be quantified in the sediments of the Carolina depocenter and the Gulf of Mexico, and the biogeochemical processes regulating the production and the flux of iron as a function of the redox regime of the environment will be determined using in situ measurements and state-of-the-art voltammetric and chromatographic techniques.
attribute	NC_GLOBAL	projects_0_end_date	String	2017-08
attribute	NC_GLOBAL	projects_0_geolocation	String	Northern South Atlantic Bight (Cape Lookout, NC) and Northern Gulf of Mexico
attribute	NC_GLOBAL	projects_0_name	String	Source, Composition, and Stability of Soluble Iron Fluxing from Continental Margin Sediments
attribute	NC_GLOBAL	projects_0_project_nid	String	743719
attribute	NC_GLOBAL	projects_0_start_date	String	2014-09
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	Southernmost_Northing	double	33.8715
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	Year,Collection_Type
attribute	NC_GLOBAL	summary	String	Sediment pore water and solid phase geochemical analyses from samples collected on R/V Savannah cruise SAV-15-18 at the Cape Lookout Continental Shelf and Slope during July 2015.
attribute	NC_GLOBAL	title	String	[Pore Water Depth Profiles CL2015] - Sediment pore water and solid phase geochemical analyses from samples collected on R/V Savannah cruise SAV-15-18 at the Cape Lookout Continental Shelf and Slope during July 2015 (Source, Composition, and Stability of Soluble Iron Fluxing from Continental Margin Sediments)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-76.4343
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	Year		short
attribute	Year	_FillValue	short	32767
attribute	Year	actual_range	short	2015, 2015
attribute	Year	bcodmo_name	String	year
attribute	Year	description	String	Year
attribute	Year	long_name	String	Year
attribute	Year	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/
attribute	Year	units	String	unitless
variable	Month		byte
attribute	Month	_FillValue	byte	127
attribute	Month	actual_range	byte	7, 7
attribute	Month	bcodmo_name	String	month
attribute	Month	description	String	Month
attribute	Month	long_name	String	Month
attribute	Month	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/MNTHXXXX/
attribute	Month	units	String	unitless
variable	Day		byte
attribute	Day	_FillValue	byte	127
attribute	Day	actual_range	byte	8, 20
attribute	Day	bcodmo_name	String	day
attribute	Day	description	String	Day
attribute	Day	long_name	String	Day
attribute	Day	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DAYXXXXX/
attribute	Day	units	String	unitless
variable	Collection_Type		String
attribute	Collection_Type	bcodmo_name	String	instrument
attribute	Collection_Type	description	String	Instrument used for collection
attribute	Collection_Type	long_name	String	Collection Type
attribute	Collection_Type	units	String	unitless
variable	Station		String
attribute	Station	bcodmo_name	String	station
attribute	Station	description	String	Station number
attribute	Station	long_name	String	Station
attribute	Station	units	String	unitless
variable	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	NaN
attribute	longitude	actual_range	double	-76.4343, -75.806
attribute	longitude	axis	String	X
attribute	longitude	bcodmo_name	String	longitude
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	description	String	Longitude
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LONX/
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	33.8715, 34.266
attribute	latitude	axis	String	Y
attribute	latitude	bcodmo_name	String	latitude
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	description	String	Latitude
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LATX/
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	sample_ID		byte
attribute	sample_ID	_FillValue	byte	127
attribute	sample_ID	actual_range	byte	0, 25
attribute	sample_ID	bcodmo_name	String	sample
attribute	sample_ID	description	String	Sample ID number
attribute	sample_ID	long_name	String	Sample ID
attribute	sample_ID	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/ACYC/
attribute	sample_ID	units	String	unitless
variable	Sediment_depth		double
attribute	Sediment_depth	_FillValue	double	NaN
attribute	Sediment_depth	actual_range	double	-0.5, 26.6
attribute	Sediment_depth	bcodmo_name	String	depth_bsf
attribute	Sediment_depth	description	String	Sediment depth
attribute	Sediment_depth	long_name	String	Sediment Depth
attribute	Sediment_depth	units	String	centimeters (cm)
variable	SO4		float
attribute	SO4	_FillValue	float	NaN
attribute	SO4	actual_range	float	18.19, 38.31
attribute	SO4	bcodmo_name	String	SO4
attribute	SO4	description	String	Sulfate
attribute	SO4	long_name	String	SO4
attribute	SO4	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/SPHTMAXX/
attribute	SO4	units	String	millimolar (mM)
variable	sdSO4		float
attribute	sdSO4	_FillValue	float	NaN
attribute	sdSO4	actual_range	float	0.07, 1.04
attribute	sdSO4	bcodmo_name	String	SO4
attribute	sdSO4	description	String	Standard deviation of SO4
attribute	sdSO4	long_name	String	Sd SO4
attribute	sdSO4	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/SPHTMAXX/
attribute	sdSO4	units	String	millimolar (mM)
variable	PO4		float
attribute	PO4	_FillValue	float	NaN
attribute	PO4	actual_range	float	0.12, 46.06
attribute	PO4	bcodmo_name	String	PO4
attribute	PO4	description	String	Dissolved orthophosphate
attribute	PO4	long_name	String	Mass Concentration Of Phosphate In Sea Water
attribute	PO4	units	String	micromolar (uM)
variable	sdPO4		float
attribute	sdPO4	_FillValue	float	NaN
attribute	sdPO4	actual_range	float	0.05, 1.84
attribute	sdPO4	bcodmo_name	String	PO4
attribute	sdPO4	description	String	Standard deviation of PO4
attribute	sdPO4	long_name	String	Sd PO4
attribute	sdPO4	units	String	micromolar (uM)
variable	DIC		float
attribute	DIC	_FillValue	float	NaN
attribute	DIC	actual_range	float	1.04, 4.52
attribute	DIC	bcodmo_name	String	DIC
attribute	DIC	description	String	Dissolved inorganic carbon
attribute	DIC	long_name	String	DIC
attribute	DIC	units	String	millimolar (mM)
variable	sdDIC		float
attribute	sdDIC	_FillValue	float	NaN
attribute	sdDIC	actual_range	float	0.0, 0.56
attribute	sdDIC	bcodmo_name	String	DIC
attribute	sdDIC	description	String	Standard deviation of DIC
attribute	sdDIC	long_name	String	Sd DIC
attribute	sdDIC	units	String	millimolar (mM)
variable	date		String
attribute	date	bcodmo_name	String	date
attribute	date	description	String	Date; format: yyyy-mm-dd
attribute	date	long_name	String	Date
attribute	date	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	date	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.