ERDDAP > info > bcodmo_dataset_4070

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
		data	graph		files	public	[GT10-11 - delta 30Si] - Profiles of stable isotopes of silicon (Si) in silicic acid (Si(OH) 4) from R/V Knorr cruises KN199-04, KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) (U.S. GEOTRACES North Atlantic Transect)		F   I   M	background			BCO-DMO	bcodmo_dataset_4070

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	Refer to the [Si Natural Abundance Protocol document](\\"https://datadocs.bco- dmo.org/docs/302/geotraces/brzezinski/data_docs/Natural_Abundance_Protocol.pdf\\") (PDF) for methodology. Briefly: Water samples were collected with a conventional CTD and rosette as Si isotopes are not contamination prone. Water samples were filtered through a polyethersulfone filter cartridge directly from each sampling bottle using silicon tubing and stored in either high density polyethylene or polypropylene bottles that were precleaned by an overnight soak in 10% ACS grade HCl and rinsed with high purity deionized distilled water (> 18 M-Ohm - cm) and stored at room temperature. Analytical methodology followed Brzezinski et al. (2006).
attribute	NC_GLOBAL	awards_0_award_nid	String	55219
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1129227
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward?AWD_ID=1129227
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	Donald L. Rice
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	51467
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Profiles of Stable Isotopes of Silicon is Silicic Acid [delta 30Si(OH)4] from GT10 and GT11 Cruises PI: Mark Brzezinski (UCSB) Version: 04 Nov 2013
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	dataset_current_state	String	Final and no updates
attribute	NC_GLOBAL	date_created	String	2013-11-01T15:55:09Z
attribute	NC_GLOBAL	date_modified	String	2020-04-30T17:16:16Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.4070.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-18.2542
attribute	NC_GLOBAL	geospatial_lat_max	double	39.6994
attribute	NC_GLOBAL	geospatial_lat_min	double	17.3503
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-18.2542
attribute	NC_GLOBAL	geospatial_lon_min	double	-69.799
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	5604.3
attribute	NC_GLOBAL	geospatial_vertical_min	double	29.9
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/4070
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	Niskin bottle
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	6384
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_0_supplied_name	String	Niskin bottle
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, bottle, bottle_GEOTRC, btl, BTL_ISO_DateTime_UTC, cast, cast_GEOTRC, chemical, comment, cruise, cruise_id, cruise_name, d30, d30Si_mean, d30Si_mean_sd, data, dataset, date, date_gmt, depth, depth_GEOTRC_CTD, depth_w, dmo, erddap, event, event_GEOTRC, geotrc, iso, latitude, longitude, management, mean, name, num, num_reps, oceanography, office, preliminary, reps, sample, sample_bottle_GEOTRC, sample_GEOTRC, station, station_GEOTRC, status, status_comment, time, time_gmt
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/4070/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/4070
attribute	NC_GLOBAL	Northernmost_Northing	double	39.6994
attribute	NC_GLOBAL	param_mapping	String	{'4070': {'depth_GEOTRC_CTD': 'flag - depth', 'lat': 'flag - latitude', 'BTL_ISO_DateTime_UTC': 'flag - time', 'lon': 'flag - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/4070/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of California-Santa Barbara
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	UCSB-MSI
attribute	NC_GLOBAL	people_0_person_name	String	Mark A. Brzezinski
attribute	NC_GLOBAL	people_0_person_nid	String	50663
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	U.S. GEOTRACES NAT
attribute	NC_GLOBAL	projects_0_acronym	String	U.S. GEOTRACES NAT
attribute	NC_GLOBAL	projects_0_description	String	Much of this text appeared in an article published in OCB News, October 2008, by the OCB Project Office. The first U.S. GEOTRACES Atlantic Section will be specifically centered around a sampling cruise to be carried out in the North Atlantic in 2010. Ed Boyle (MIT) and Bill Jenkins (WHOI) organized a three-day planning workshop that was held September 22-24, 2008 at the Woods Hole Oceanographic Institution. The main goal of the workshop, sponsored by the National Science Foundation and the U.S. GEOTRACES Scientific Steering Committee, was to design the implementation plan for the first U.S. GEOTRACES Atlantic Section. The primary cruise design motivation was to improve knowledge of the sources, sinks and internal cycling of Trace Elements and their Isotopes (TEIs) by studying their distributions along a section in the North Atlantic (Figure 1). The North Atlantic has the full suite of processes that affect TEIs, including strong meridional advection, boundary scavenging and source effects, aeolian deposition, and the salty Mediterranean Outflow. The North Atlantic is particularly important as it lies at the "origin" of the global Meridional Overturning Circulation. It is well understood that many trace metals play important roles in biogeochemical processes and the carbon cycle, yet very little is known about their large-scale distributions and the regional scale processes that affect them. Recent advances in sampling and analytical techniques, along with advances in our understanding of their roles in enzymatic and catalytic processes in the open ocean provide a natural opportunity to make substantial advances in our understanding of these important elements. Moreover, we are motivated by the prospect of global change and the need to understand the present and future workings of the ocean's biogeochemistry. The GEOTRACES strategy is to measure a broad suite of TEIs to constrain the critical biogeochemical processes that influence their distributions. In addition to these "exotic" substances, more traditional properties, including macronutrients (at micromolar and nanomolar levels), CTD, bio-optical parameters, and carbon system characteristics will be measured. The cruise starts at Line W, a repeat hydrographic section southeast of Cape Cod, extends to Bermuda and subsequently through the North Atlantic oligotrophic subtropical gyre, then transects into the African coast in the northern limb of the coastal upwelling region. From there, the cruise goes northward into the Mediterranean outflow. The station locations shown on the map are for the "fulldepth TEI" stations, and constitute approximately half of the stations to be ultimately occupied. Figure 1. The proposed 2010 Atlantic GEOTRACES cruise track plotted on dissolved oxygen at 400 m depth. Data from the World Ocean Atlas (Levitus et al., 2005) were plotted using Ocean Data View (courtesy Reiner Schlitzer). [click on the image to view a larger version] Hydrography, CTD and nutrient measurements will be supported by the Ocean Data Facility (J. Swift) at Scripps Institution of Oceanography and funded through NSF Facilities. They will be providing an additional CTD rosette system along with nephelometer and LADCP. A trace metal clean Go-Flo Rosette and winch will be provided by the group at Old Dominion University (G. Cutter) along with a towed underway pumping system. The North Atlantic Transect cruise began in 2010 with KN199 leg 4 (station sampling) and leg 5 (underway sampling only) (Figure 2). KN199-04 Cruise Report (PDF) Figure 2. The red line shows the cruise track for the first leg of the US Geotraces North Atlantic Transect on the R/V Knorr in October 2010.  The rest of the stations (beginning with 13) will be completed in October-December 2011 on the R/V Knorr (courtesy of Bill Jenkins, Chief Scientist, GNAT first leg). [click on the image to view a larger version] The section completion effort resumed again in November 2011 with KN204-01A,B (Figure 3). KN204-01A,B Cruise Report (PDF) Figure 3. Station locations occupied on the US Geotraces North Atlantic Transect on the R/V Knorr in November 2011.  [click on the image to view a larger version] Data from the North Atlantic Transect cruises are available under the Datasets heading below, and consensus values for the SAFe and North Atlantic GEOTRACES Reference Seawater Samples are available from the GEOTRACES Program Office: Standards and Reference Materials ADCP data are available from the Currents ADCP group at the University of Hawaii at the links below:KN199-04   (leg 1 of 2010 cruise; Lisbon to Cape Verde)KN199-05   (leg 2 of 2010 cruise; Cape Verde to Charleston, NC)KN204-01A (part 1 of 2011 cruise; Woods Hole, MA to Bermuda)KN204-01B (part 2 of 2011 cruise; Bermuda to Cape Verde)
attribute	NC_GLOBAL	projects_0_end_date	String	2013-08
attribute	NC_GLOBAL	projects_0_geolocation	String	Subtropical western and eastern North Atlantic Ocean
attribute	NC_GLOBAL	projects_0_name	String	U.S. GEOTRACES North Atlantic Transect
attribute	NC_GLOBAL	projects_0_project_nid	String	2066
attribute	NC_GLOBAL	projects_0_project_website	String	https://www.geotraces.org/
attribute	NC_GLOBAL	projects_0_start_date	String	2010-10
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	17.3503
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Profiles of stable isotopes of silicon in silicic acid (delta 30Si) collected at stations during the GT10 (KN199-04) and GT11 (KN204-01) U.S. GEOTRACES North Atlantic Transect cruises.
attribute	NC_GLOBAL	time_coverage_end	String	2011-12-10T09:19:00.00Z
attribute	NC_GLOBAL	time_coverage_start	String	2010-10-27T20:23:00.00Z
attribute	NC_GLOBAL	title	String	[GT10-11 - delta 30Si] - Profiles of stable isotopes of silicon (Si) in silicic acid (Si(OH)4) from R/V Knorr cruises KN199-04, KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) (U.S. GEOTRACES North Atlantic Transect)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-69.799
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.5
variable	cruise_id		String
attribute	cruise_id	bcodmo_name	String	cruise_id
attribute	cruise_id	description	String	Official cruise identifier e.g. KN199-04 = R/V Knorr cruise number 199-04.
attribute	cruise_id	long_name	String	Cruise Id
attribute	cruise_id	units	String	text
variable	cruise_name		String
attribute	cruise_name	bcodmo_name	String	Cruise Name
attribute	cruise_name	description	String	GEOTRACES cruise identifier.
attribute	cruise_name	long_name	String	Cruise Name
attribute	cruise_name	units	String	text
variable	station_GEOTRC		byte
attribute	station_GEOTRC	_FillValue	byte	127
attribute	station_GEOTRC	actual_range	byte	1, 24
attribute	station_GEOTRC	bcodmo_name	String	station
attribute	station_GEOTRC	description	String	GEOTRACES station number; ranges from 1 through 12 for KN199-04 and 1 through 24 for KN204-01. Stations 7 and 9 were skipped on KN204-01. Some GeoFish stations are denoted as X_to_Y indicating the tow occurred between stations X and Y. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Station', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute	station_GEOTRC	long_name	String	Station GEOTRC
attribute	station_GEOTRC	units	String	dimensionless
variable	cast_GEOTRC		byte
attribute	cast_GEOTRC	_FillValue	byte	127
attribute	cast_GEOTRC	actual_range	byte	1, 11
attribute	cast_GEOTRC	bcodmo_name	String	cast
attribute	cast_GEOTRC	description	String	Cast identifier numbered consecutively within a station. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
attribute	cast_GEOTRC	long_name	String	Cast GEOTRC
attribute	cast_GEOTRC	units	String	dimensionless
variable	event_GEOTRC		short
attribute	event_GEOTRC	_FillValue	short	32767
attribute	event_GEOTRC	actual_range	short	2162, 3281
attribute	event_GEOTRC	bcodmo_name	String	event
attribute	event_GEOTRC	description	String	Unique identifying number for US GEOTRACES sampling events; ranges from 2001 to 2225 for KN199-04 events and from 3001 to 3282 for KN204-01 events. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Event #', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute	event_GEOTRC	long_name	String	Event GEOTRC
attribute	event_GEOTRC	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/
attribute	event_GEOTRC	units	String	dimensionless
variable	depth_w		short
attribute	depth_w	_FillValue	short	32767
attribute	depth_w	actual_range	short	2079, 5645
attribute	depth_w	bcodmo_name	String	depth_w
attribute	depth_w	colorBarMaximum	double	8000.0
attribute	depth_w	colorBarMinimum	double	-8000.0
attribute	depth_w	colorBarPalette	String	TopographyDepth
attribute	depth_w	description	String	Bottom depth (depth of the water), in meters.
attribute	depth_w	long_name	String	Depth
attribute	depth_w	standard_name	String	depth
attribute	depth_w	units	String	meters
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	17.3503, 39.6994
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. South is negative.
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	-69.799, -18.2542
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. West is negative.
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	date_gmt		int
attribute	date_gmt	_FillValue	int	2147483647
attribute	date_gmt	actual_range	int	20101027, 20111210
attribute	date_gmt	bcodmo_name	String	date_gmt
attribute	date_gmt	description	String	Date (GMT) when the sampling event occurred; 4-digit year, 2-digit month, 2-digit day.
attribute	date_gmt	long_name	String	Date Gmt
attribute	date_gmt	units	String	unitless
variable	time_gmt		String
attribute	time_gmt	bcodmo_name	String	time_gmt
attribute	time_gmt	description	String	Time (GMT) when the sampling event occurred, in hours, minutes, and decimal minutes. in the format HHmm.xx
attribute	time_gmt	long_name	String	Time Gmt
attribute	time_gmt	units	String	unitless
variable	event_ISO_DateTime_UTC		String
attribute	event_ISO_DateTime_UTC	bcodmo_name	String	ISO_DateTime_UTC
attribute	event_ISO_DateTime_UTC	description	String	Date and time (UTC) when the sampling event occurred formatted to the ISO 8601 standard, where T represents the start of the time string. in the format YYYY-mm-ddTHH:MM:SS.xx
attribute	event_ISO_DateTime_UTC	long_name	String	Event ISO Date Time UTC
attribute	event_ISO_DateTime_UTC	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/
attribute	event_ISO_DateTime_UTC	source_name	String	event_ISO_DateTime_UTC
attribute	event_ISO_DateTime_UTC	time_precision	String	1970-01-01T00:00:00.00Z
attribute	event_ISO_DateTime_UTC	units	String	unitless
variable	sample_GEOTRC		short
attribute	sample_GEOTRC	_FillValue	short	32767
attribute	sample_GEOTRC	actual_range	short	5624, 8140
attribute	sample_GEOTRC	bcodmo_name	String	sample
attribute	sample_GEOTRC	description	String	Unique identifying number for US GEOTRACES samples; ranges from 5033 to 6078 for KN199-04 and from 6112 to 8148 for KN204-01. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Samp#', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute	sample_GEOTRC	long_name	String	Sample GEOTRC
attribute	sample_GEOTRC	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/ACYC/
attribute	sample_GEOTRC	units	String	dimensionless
variable	sample_bottle_GEOTRC		byte
attribute	sample_bottle_GEOTRC	_FillValue	byte	127
attribute	sample_bottle_GEOTRC	actual_range	byte	1, 12
attribute	sample_bottle_GEOTRC	bcodmo_name	String	bot_Nis
attribute	sample_bottle_GEOTRC	description	String	Unique identification numbers given to samples taken from bottles; ranges from 1 to 24; often used synonymously with bottle number. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
attribute	sample_bottle_GEOTRC	long_name	String	Sample Bottle GEOTRC
attribute	sample_bottle_GEOTRC	units	String	dimensionless
variable	bottle_GEOTRC		String
attribute	bottle_GEOTRC	bcodmo_name	String	bot
attribute	bottle_GEOTRC	description	String	Alphanumeric characters identifying bottle type (e.g., NIS representing Niskin and GF representing GOFLO) and position on a CTD rosette. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
attribute	bottle_GEOTRC	long_name	String	Bottle GEOTRC
attribute	bottle_GEOTRC	units	String	dimensionless
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	NaN
attribute	depth	actual_range	double	29.9, 5604.3
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	Observation/sample depth in meters; calculated from CTD pressure. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
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	d30Si_mean		float
attribute	d30Si_mean	_FillValue	float	NaN
attribute	d30Si_mean	actual_range	float	1.44, 2.38
attribute	d30Si_mean	bcodmo_name	String	unknown
attribute	d30Si_mean	description	String	Mean delta30Si(OH)4 relative to the NBS28 standard (NIST RM 8546).
attribute	d30Si_mean	long_name	String	D30 Si Mean
attribute	d30Si_mean	units	String	per mil (0/00)
variable	d30Si_mean_sd		float
attribute	d30Si_mean_sd	_FillValue	float	NaN
attribute	d30Si_mean_sd	actual_range	float	6.0E-4, 0.1901
attribute	d30Si_mean_sd	bcodmo_name	String	standard deviation
attribute	d30Si_mean_sd	colorBarMaximum	double	50.0
attribute	d30Si_mean_sd	colorBarMinimum	double	0.0
attribute	d30Si_mean_sd	description	String	Standard deviation of d30Si_mean; standard deviation of delta30Si(OH)4 relative to the NBS28 standard (NIST RM 8546).
attribute	d30Si_mean_sd	long_name	String	D30 Si Mean Sd
attribute	d30Si_mean_sd	units	String	per mil (0/00)
variable	num_reps		byte
attribute	num_reps	_FillValue	byte	127
attribute	num_reps	actual_range	byte	1, 8
attribute	num_reps	bcodmo_name	String	num_reps
attribute	num_reps	description	String	Number of values for mean and standard deviation of delta30Si(OH)4.
attribute	num_reps	long_name	String	Num Reps
attribute	num_reps	units	String	dimensionless
variable	status_comment		String
attribute	status_comment	bcodmo_name	String	comment
attribute	status_comment	description	String	Comment on the status of the data.
attribute	status_comment	long_name	String	Status Comment
attribute	status_comment	units	String	text
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.28821098E9, 1.32350874E9
attribute	time	axis	String	T
attribute	time	bcodmo_name	String	ISO_DateTime_UTC
attribute	time	description	String	Date and time (UTC) variable recorded at the bottle sampling time in ISO compliant format. Values were added from the intermediate US GEOTRACES master file (see Processing Description). This standard is based on ISO 8601:2004(E) and takes on the following form: 2009-08-30T14:05:00[.xx]Z (UTC time)
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	BTL ISO Date Time UTC
attribute	time	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	time_precision	String	1970-01-01T00:00:00.00Z
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z

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.