ERDDAP > info > bcodmo_dataset_782977

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	Dissolved radium isotope activity around Guaymas Basin from samples collected by CTD and HOV Alvin during R/V Atlantis cruise AT37-06 in December 2016		I   M	background			BCO-DMO	bcodmo_dataset_782977

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,.odvTxt
attribute	NC_GLOBAL	acquisition_description	String	Samples for this dataset were separated into different worksheets depending on the sample collection method (worksheets have been combined into one dataset; \"Collection_Method\" column indicates the source worksheet). \"CTD\" samples were collected from 20L Niskin bottles associated with CTD casts by slowly (<1 L/min) draining the sample via a sampling tube from the spigot on the Niskin bottle through a dry, 25 g aliquot of acrylic fiber impregnated with MnO2 (Moore, 1976). These \"Mn fibers\" quantitatively sorb Ra isotopes from the aqueous phase. \"Core-top waters\" were collected by gravity siphoning water overlying sediment cores that were collected as push cores by HOV Alvin, filtering the samples through 0.45 um cellulose filters, then slowly (< 1 L/min) passing the effluent over 25 g Mn fiber. \"Alvin Slurp\"\u00a0samples were collected using the slurp gun on HOV Alvin. These sample waters were stored onboard Alvin until they were recovered on the ship and slowly (< 1 L/min) passed over 25 g Mn fiber. Finally, \"Alvin Niskins\" were recovered from one or several of the 1.25 L Niskin bottles on Alvin. On the ship, these water samples were drained from the Niskin bottles and slowly (<1 L/min) passed over 25 g Mn fiber.\u00a0 After passing the water samples over the Mn fibers, the fibers were rinsed with Ra-free fresh water, then dried using a compressed air stream to a suitable humidity (Sun and Torgersen, 1998). The fibers were then counted immediately on a Radium Delayed Coincidence Counter (Moore and Arnold, 1996) for total Ra-224 and Ra-223 activity. The fibers were counted again after 3 weeks to measure the supported Ra-224 activity from any sorbed Th-228 on the fibers. This activity is subtracted from the total Ra-224 activity derived from the initial measurement to compute the excess Ra-224 activity (the activity reported in the dataset). Ra-226 activities were measured by sealing the Mn fibers in air-tight cartridges for ~1 week and measuring the accumulated Rn-222 (daughter product of Ra-226) on a radon emanation line (Peterson et al., 2009). Fibers were then counted an additional time on the Radium Delayed Coincidence Counter after ~1 year from collection for Ra-228 (as the change in Th-228 activity from the 3-week measurement; Moore, 2008). Analytical uncertainties are based on counting statistics (as 1-s standard deviation of the total counts logged, propagated through the activity computations).
attribute	NC_GLOBAL	awards_0_award_nid	String	754842
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1558829
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1558829
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	Guaymas Water Column Radium from cruise AT37-06 PI: Richard Peterson Version date: 26-Nov-2019
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	2019-11-26T20:26:41Z
attribute	NC_GLOBAL	date_modified	String	2019-12-09T17:38:23Z
attribute	NC_GLOBAL	defaultDataQuery	String	&amp;time&lt;now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.782977.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-111.381567
attribute	NC_GLOBAL	geospatial_lat_max	double	27.509165
attribute	NC_GLOBAL	geospatial_lat_min	double	27.006592
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-111.381567
attribute	NC_GLOBAL	geospatial_lon_min	double	-111.681819
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	2000.0
attribute	NC_GLOBAL	geospatial_vertical_min	double	50.0
attribute	NC_GLOBAL	geospatial_vertical_positive	String	down
attribute	NC_GLOBAL	geospatial_vertical_units	String	m
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/782977
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	Niskin bottle
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Samples were collected from 20L Niskin bottles associated with CTD casts and from HOV Alvin's Niskin bottles.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	783010
attribute	NC_GLOBAL	instruments_0_description	String	A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24 or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Niskin bottle
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	413
attribute	NC_GLOBAL	instruments_1_acronym	String	CTD
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	783013
attribute	NC_GLOBAL	instruments_1_description	String	The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column and permits scientists observe the physical properties in real time via a conducting cable connecting the CTD to a deck unit and computer on the ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast. This instrument designation is used when specific make and model are not known.
attribute	NC_GLOBAL	instruments_1_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/130/
attribute	NC_GLOBAL	instruments_1_instrument_name	String	CTD profiler
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	417
attribute	NC_GLOBAL	instruments_1_supplied_name	String	CTD
attribute	NC_GLOBAL	instruments_2_acronym	String	Tube Core
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	783011
attribute	NC_GLOBAL	instruments_2_description	String	A plastic tube, about 40 cm (16 inches) long, is pushed into the sediment by Alvin's manipulator arm to collect a sediment core.
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Alvin tube core
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	641
attribute	NC_GLOBAL	instruments_2_supplied_name	String	HOV Alvin push core
attribute	NC_GLOBAL	instruments_3_acronym	String	RaDeCC
attribute	NC_GLOBAL	instruments_3_dataset_instrument_nid	String	783025
attribute	NC_GLOBAL	instruments_3_description	String	The RaDeCC is an alpha scintillation counter that distinguishes decay events of short-lived radium daughter products based on their contrasting half-lives. This system was pioneered by Giffin et al. (1963) and adapted for radium measurements by Moore and Arnold (1996). References: Giffin, C., A. Kaufman, W.S. Broecker (1963). Delayed coincidence counter for the assay of actinon and thoron. J. Geophys. Res., 68, pp. 1749-1757. Moore, W.S., R. Arnold (1996). Measurement of 223Ra and 224Ra in coastal waters using a delayed coincidence counter. J. Geophys. Res., 101 (1996), pp. 1321-1329. Charette, Matthew A.; Dulaiova, Henrieta; Gonneea, Meagan E.; Henderson, Paul B.; Moore, Willard S.; Scholten, Jan C.; Pham, M. K. (2012). GEOTRACES radium isotopes interlaboratory comparison experiment. Limnology and Oceanography - Methods, vol 10, pg 451.
attribute	NC_GLOBAL	instruments_3_instrument_name	String	Radium Delayed Coincidence Counter
attribute	NC_GLOBAL	instruments_3_instrument_nid	String	688
attribute	NC_GLOBAL	instruments_4_dataset_instrument_nid	String	783012
attribute	NC_GLOBAL	instruments_4_description	String	Small and large capacity vacuum pump samplers. May have single or multiple chambers. See https://www.whoi.edu/main/alvin/subsystems/optional-scientific-samplers
attribute	NC_GLOBAL	instruments_4_instrument_name	String	Alvin Slurp Sampler
attribute	NC_GLOBAL	instruments_4_instrument_nid	String	644821
attribute	NC_GLOBAL	instruments_4_supplied_name	String	HOV Alvin slurp gun
attribute	NC_GLOBAL	keywords	String	activity, alvin, Alvin_Dive_Number, bco, bco-dmo, biological, cast, chemical, collection, Collection_Method, core, Core_Number, data, dataset, date, depth, dive, dmo, erddap, latitude, longitude, management, method, number, oceanography, office, preliminary, ra223, Ra223_Activity, Ra223_Unc, ra224, Ra224_Activity, Ra224_Unc, ra226, Ra226_Activity, Ra226_Unc, ra228, Ra228_Activity, Ra228_Unc, sample, Sample_Volume, time, unc, volume
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/782977/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/782977
attribute	NC_GLOBAL	Northernmost_Northing	double	27.509165
attribute	NC_GLOBAL	param_mapping	String	{'782977': {'Latitude': 'flag - latitude', 'Date_Time': 'flag - time', 'Depth': 'flag - depth', 'Longitude': 'flag - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/782977/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Coastal Carolina University
attribute	NC_GLOBAL	people_0_person_name	String	Richard N. Peterson
attribute	NC_GLOBAL	people_0_person_nid	String	701779
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	Guaymas Basin Ra 224 Approach
attribute	NC_GLOBAL	projects_0_acronym	String	Guaymas Basin Ra 224 Approach
attribute	NC_GLOBAL	projects_0_description	String	NSF Award Abstract: This project proposes to validate a new approach to measure porewater flow dynamics from deep sea sediments using a biologically conservative, naturally-occurring tracer, Radium 224, which is constantly produced by porewaters. The technique will be validated using independent measures of porewater fluxes (i.e. heat gradients and magnesium profiles) during a cruise to the Guaymas Basin in the Gulf of California that is already funded by NSF. Once validated the technique will be broadly applicable to all sedimentary environments including oceans, rivers/streams, wetlands and lakes. Understanding porewater flow dynamics is important to understanding ocean and other aquatic system chemical budgets, microbial ecology and global heat flow. This proposal hypothesizes that the short-lived radium isotope Ra 224 may serve as an effective tracer of porewater flows in deep ocean systems, regardless of the type or composition of seepages, because its sources and sinks can be uniquely constrained. The method will be tested in the Guaymas Basin which is comprised of areas undergoing a range of seepage rates and offers porewater thermal gradients resulting from the hydrothermal system. As a result heat fluxes and gradients in magnesium and other cations affected by high-temperature water/rock interactions can be used to independently validate the porewater flows measured by Ra 224.
attribute	NC_GLOBAL	projects_0_end_date	String	2019-07
attribute	NC_GLOBAL	projects_0_geolocation	String	Guaymas Basin, Gulf of California
attribute	NC_GLOBAL	projects_0_name	String	Validation of a New Geochemical Approach to Constrain Deep Sea Porewater Residence Times and Advection Rates: Applications to Biogeochemical Cycling at Guaymas Basin
attribute	NC_GLOBAL	projects_0_project_nid	String	754843
attribute	NC_GLOBAL	projects_0_start_date	String	2016-02
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	27.006592
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	This dataset presents dissolved radium isotope activities around Guaymas Basin.
attribute	NC_GLOBAL	time_coverage_end	String	2016-12-25T00:08Z
attribute	NC_GLOBAL	time_coverage_start	String	2016-12-12T06:42Z
attribute	NC_GLOBAL	title	String	Dissolved radium isotope activity around Guaymas Basin from samples collected by CTD and HOV Alvin during R/V Atlantis cruise AT37-06 in December 2016
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-111.681819
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	Collection_Method		String
attribute	Collection_Method	bcodmo_name	String	instrument
attribute	Collection_Method	description	String	Sample collection method
attribute	Collection_Method	long_name	String	Collection Method
attribute	Collection_Method	units	String	unitless
variable	Alvin_Dive_Number		short
attribute	Alvin_Dive_Number	_FillValue	short	32767
attribute	Alvin_Dive_Number	actual_range	short	4861, 4872
attribute	Alvin_Dive_Number	bcodmo_name	String	dive_id
attribute	Alvin_Dive_Number	colorBarMaximum	double	100.0
attribute	Alvin_Dive_Number	colorBarMinimum	double	0.0
attribute	Alvin_Dive_Number	description	String	Numeric identifier for Alvin dive (not applicable where Collection_Method = CTD)
attribute	Alvin_Dive_Number	long_name	String	Alvin Dive Number
attribute	Alvin_Dive_Number	units	String	unitless
variable	Cast		byte
attribute	Cast	_FillValue	byte	127
attribute	Cast	actual_range	byte	1, 11
attribute	Cast	bcodmo_name	String	cast
attribute	Cast	description	String	Numerical reference for CTD cast # (Collection_Method = CTD only)
attribute	Cast	long_name	String	Cast
attribute	Cast	units	String	unitless
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	NaN
attribute	depth	actual_range	double	50.0, 2000.0
attribute	depth	axis	String	Z
attribute	depth	bcodmo_name	String	depth
attribute	depth	colorBarMaximum	double	8000.0
attribute	depth	colorBarMinimum	double	-8000.0
attribute	depth	colorBarPalette	String	TopographyDepth
attribute	depth	description	String	Sampling depth (Collection_Method = CTD only)
attribute	depth	ioos_category	String	Location
attribute	depth	long_name	String	Depth
attribute	depth	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/DEPH/
attribute	depth	positive	String	down
attribute	depth	standard_name	String	depth
attribute	depth	units	String	m
variable	Core_Number		byte
attribute	Core_Number	_FillValue	byte	127
attribute	Core_Number	actual_range	byte	1, 29
attribute	Core_Number	bcodmo_name	String	core_id
attribute	Core_Number	colorBarMaximum	double	100.0
attribute	Core_Number	colorBarMinimum	double	0.0
attribute	Core_Number	description	String	Core tube identifier for the specific Alvin dive (Collection_Method = Core_top_waters only)
attribute	Core_Number	long_name	String	Core Number
attribute	Core_Number	units	String	unitless
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.48152492E9, 1.48262448E9
attribute	time	axis	String	T
attribute	time	bcodmo_name	String	ISO_DateTime_UTC
attribute	time	description	String	Sampling date and time (GMT); format: yyyy-mm-ddTHH:MM
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Date Time
attribute	time	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/
attribute	time	source_name	String	Date_Time
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	time_precision	String	1970-01-01T00:00Z
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	27.006592, 27.509165
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	Sampling 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	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	NaN
attribute	longitude	actual_range	double	-111.681819, -111.381567
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	Sampling 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	Sample_Volume		float
attribute	Sample_Volume	_FillValue	float	NaN
attribute	Sample_Volume	actual_range	float	0.09, 78.4
attribute	Sample_Volume	bcodmo_name	String	sample_volume
attribute	Sample_Volume	description	String	Sample volume
attribute	Sample_Volume	long_name	String	Sample Volume
attribute	Sample_Volume	units	String	liters (L)
variable	Ra223_Activity		String
attribute	Ra223_Activity	bcodmo_name	String	radioactive_isotope_conc
attribute	Ra223_Activity	description	String	Measured activity of Ra-223; "BD" = below detection
attribute	Ra223_Activity	long_name	String	Ra223 Activity
attribute	Ra223_Activity	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/WRAD/
attribute	Ra223_Activity	units	String	dpm/100L
variable	Ra223_Unc		String
attribute	Ra223_Unc	bcodmo_name	String	radioactive_isotope_conc
attribute	Ra223_Unc	description	String	1-s analytical uncertainty in measured activity of Ra-223; "BD" = below detection
attribute	Ra223_Unc	long_name	String	Ra223 Unc
attribute	Ra223_Unc	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/WRAD/
attribute	Ra223_Unc	units	String	dpm/100L
variable	Ra224_Activity		String
attribute	Ra224_Activity	bcodmo_name	String	radioactive_isotope_conc
attribute	Ra224_Activity	description	String	Measured activity of Ra-224; "BD" = below detection
attribute	Ra224_Activity	long_name	String	Ra224 Activity
attribute	Ra224_Activity	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/WRAD/
attribute	Ra224_Activity	units	String	dpm/100L
variable	Ra224_Unc		String
attribute	Ra224_Unc	bcodmo_name	String	radioactive_isotope_conc
attribute	Ra224_Unc	description	String	1-s analytical uncertainty in measured activity of Ra-224; "BD" = below detection
attribute	Ra224_Unc	long_name	String	Ra224 Unc
attribute	Ra224_Unc	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/WRAD/
attribute	Ra224_Unc	units	String	dpm/100L
variable	Ra226_Activity		float
attribute	Ra226_Activity	_FillValue	float	NaN
attribute	Ra226_Activity	actual_range	float	11.968, 1838.422
attribute	Ra226_Activity	bcodmo_name	String	radioactive_isotope_conc
attribute	Ra226_Activity	description	String	Measured activity of Ra-226; "BD" = below detection
attribute	Ra226_Activity	long_name	String	Ra226 Activity
attribute	Ra226_Activity	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/WRAD/
attribute	Ra226_Activity	units	String	dpm/100L
variable	Ra226_Unc		float
attribute	Ra226_Unc	_FillValue	float	NaN
attribute	Ra226_Unc	actual_range	float	0.505, 616.836
attribute	Ra226_Unc	bcodmo_name	String	radioactive_isotope_conc
attribute	Ra226_Unc	description	String	1-s analytical uncertainty in measured activity of Ra-226; "BD" = below detection
attribute	Ra226_Unc	long_name	String	Ra226 Unc
attribute	Ra226_Unc	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/WRAD/
attribute	Ra226_Unc	units	String	dpm/100L
variable	Ra228_Activity		String
attribute	Ra228_Activity	bcodmo_name	String	radioactive_isotope_conc
attribute	Ra228_Activity	description	String	Measured activity of Ra-223; "BD" = below detection
attribute	Ra228_Activity	long_name	String	Ra228 Activity
attribute	Ra228_Activity	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/WRAD/
attribute	Ra228_Activity	units	String	dpm/100L
variable	Ra228_Unc		String
attribute	Ra228_Unc	bcodmo_name	String	radioactive_isotope_conc
attribute	Ra228_Unc	description	String	1-s analytical uncertainty in measured activity of Ra-223; "BD" = below detection
attribute	Ra228_Unc	long_name	String	Ra228 Unc
attribute	Ra228_Unc	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/WRAD/
attribute	Ra228_Unc	units	String	dpm/100L

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.