ERDDAP > info > bcodmo_dataset_3913

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	delta 15N of nitrate from R/V Knorr cruise KN199-04 & KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project)		I   M	background			BCO-DMO	bcodmo_dataset_3913

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	Sampling: Full depth and super station samples were collected from the ship's rosette. Samples were filtered through 0.8/0.45 um acropak500 filter cartridges into triple-rinsed 60 mL HDPE bottles. Demi station samples were collected from the GEOTRACES Go-Flo rosette. Samples were filtered through 0.2 um acropak capsule filters into triple-rinsed 60 mL HDPE bottles. Each sample was collected in triplicate. Samples were frozen at -20 C immediately and stored frozen until analysis. Analysis: Samples were analyzed for nitrate d15N and d18O using the denitrifier method (Sigman et al., 2001; Casciotti, et al., 2001, with technical updates described by McIlvin and Casciotti, 2011). Nitrate isotope reference materials USGS32, USGS34, and USGS35 were used to calibrate d18O and USGS32 and USGS34 to calibrate d15N. Each sample was analyzed 2-6 times. Mean and standard deviations are reported for each sample. All samples were analyzed on a DeltaPLUS XP isotope ratio mass spectrometer, with custom-built inlet described in McIlvin and Casciotti, 2011. Where possible (concentrations exceeded 2 uM), samples and standards were analyzed in 20 nanomole aliquots. When NO3- concentrations were below 2 uM, samples were injected in maximum volume (10 mL) and calibrated using interpolations between standard curves of 5 and 20 nano moles NO3-. Some samples contained nitrate concentrations lower than the typical analytical window (300 nM NO3-), but were analyzed nonetheless. Samples analyzed with concentrations below 0.3 uM are were flagged as \"low concentration\". These samples contained a subset with major ion peak areas (m/z 44) less than 1 volt-second, which are flagged at \"low area\". Two of these samples are flagged as having elevated d18O-NO3 values relative to their d15N-NO3 values. The flagged samples should be treated with caution. This version (16 March 2013) has not been thoroughly intercalibrated with data from the Sigman Lab. Currently, there exists no detachable d15N offset between the datasets. However, Casciotti d18O data are approximately 0.6 permil higher than Sigman d18O data.
attribute	NC_GLOBAL	awards_0_award_nid	String	55172
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1138360
attribute	NC_GLOBAL	awards_0_data_url	String	http://nsf.gov/awardsearch/showAward?AWD_ID=1138360
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	delta 15N of NO3 from GT10 and GT11 PI: Karen Casciotti (Stanford) Co-PI: Daniel Sigman (Princeton) Version: 29 April 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	date_created	String	2013-04-15T20:11:39Z
attribute	NC_GLOBAL	date_modified	String	2020-03-31T17:21:09Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.3913.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-9.6601
attribute	NC_GLOBAL	geospatial_lat_max	double	39.7014
attribute	NC_GLOBAL	geospatial_lat_min	double	17.3497
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-9.6601
attribute	NC_GLOBAL	geospatial_lon_min	double	-69.8644
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	5815.3
attribute	NC_GLOBAL	geospatial_vertical_min	double	9.5
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/3913
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	GO-FLO
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Demi station samples were collected from the GEOTRACES GO-FLO rosette.  The U.S. GEOTRACES sampling system consisted of 24 Teflon-coated GO-FLO bottles.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	6137
attribute	NC_GLOBAL	instruments_0_description	String	GO-FLO bottle cast used to collect water samples for pigment, nutrient, plankton, etc. The GO-FLO sampling bottle is specially designed to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/30/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	GO-FLO Bottle
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	411
attribute	NC_GLOBAL	instruments_0_supplied_name	String	GO-FLO Bottle
attribute	NC_GLOBAL	instruments_1_acronym	String	Niskin bottle
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	6138
attribute	NC_GLOBAL	instruments_1_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_1_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Niskin bottle
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	413
attribute	NC_GLOBAL	instruments_1_supplied_name	String	Niskin bottle
attribute	NC_GLOBAL	instruments_2_acronym	String	IR Mass Spec
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	All samples were analyzed on a DeltaPLUS XP isotope ratio mass spectrometer, with custom-built inlet described in McIlvin and Casciotti, 2011.
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	6139
attribute	NC_GLOBAL	instruments_2_description	String	The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).
attribute	NC_GLOBAL	instruments_2_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB16/
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Isotope-ratio Mass Spectrometer
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	469
attribute	NC_GLOBAL	instruments_2_supplied_name	String	Isotope-ratio Mass Spectrometer
attribute	NC_GLOBAL	keywords	String	area, bco, bco-dmo, biological, bottle, bottle_GEOTRC, btl, BTL_ISO_DateTime_UTC, cast, cast_GEOTRC, chemical, chemistry, conc, concentration, cruise, cruise_id, d15, d15N_NO3, d15N_NO3_sd, data, dataset, date, day, day_gmt, depth, depth_GEOTRC_CTD, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Nitrate, erddap, event, event_GEOTRC, flag, flag_low_area, flag_low_conc, geotrc, iso, latitude, longitude, low, management, mole, mole_concentration_of_nitrate_in_sea_water, month, month_gmt, n02, nitrate, no3, ocean, oceanography, oceans, office, preliminary, press, sample, sample_bottle_GEOTRC, sample_GEOTRC, science, sea, seawater, station, station_GEOTRC, time, time_gmt, water, year
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/3913/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/3913
attribute	NC_GLOBAL	Northernmost_Northing	double	39.7014
attribute	NC_GLOBAL	param_mapping	String	{'3913': {'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/3913/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Stanford University
attribute	NC_GLOBAL	people_0_person_name	String	Karen L. Casciotti
attribute	NC_GLOBAL	people_0_person_nid	String	50980
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	Princeton University
attribute	NC_GLOBAL	people_1_person_name	String	Daniel M. Sigman
attribute	NC_GLOBAL	people_1_person_nid	String	51417
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	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_2_person_name	String	Shannon Rauch
attribute	NC_GLOBAL	people_2_person_nid	String	51498
attribute	NC_GLOBAL	people_2_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_2_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	http://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	17.3497
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Dataset includes delta 15N of nitrate (NO3) measurements from the GT10 and GT11 (KN199-04 and KN204-01) U.S. GEOTRACES North Atlantic Transect cruises.
attribute	NC_GLOBAL	time_coverage_start	String	2010-10-16T02:28:00Z
attribute	NC_GLOBAL	title	String	delta 15N of nitrate from R/V Knorr cruise KN199-04 & KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-69.8644
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
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	year		short
attribute	year	_FillValue	short	32767
attribute	year	actual_range	short	2010, 2011
attribute	year	bcodmo_name	String	year
attribute	year	description	String	4-digit year. in the format YYYY
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	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. 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	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	NaN
attribute	depth	actual_range	double	9.5, 5815.3
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. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'CTD Depth', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
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	press		float
attribute	press	_FillValue	float	NaN
attribute	press	actual_range	float	9.6, 5958.6
attribute	press	bcodmo_name	String	pressure
attribute	press	description	String	Pressure (dbars) from CTD.
attribute	press	long_name	String	Press
attribute	press	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/PRESPR01/
attribute	press	units	String	decibars
variable	event_GEOTRC		short
attribute	event_GEOTRC	_FillValue	short	32767
attribute	event_GEOTRC	actual_range	short	2008, 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 number', 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	cast_GEOTRC		byte
attribute	cast_GEOTRC	_FillValue	byte	127
attribute	cast_GEOTRC	actual_range	byte	1, 9
attribute	cast_GEOTRC	bcodmo_name	String	cast
attribute	cast_GEOTRC	description	String	Cast identifier, numbered consecutively within a station. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Cast', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute	cast_GEOTRC	long_name	String	Cast GEOTRC
attribute	cast_GEOTRC	units	String	dimensionless
variable	sample_GEOTRC		short
attribute	sample_GEOTRC	_FillValue	short	32767
attribute	sample_GEOTRC	actual_range	short	5075, 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 'GEOTRACES ID', 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, 23
attribute	sample_bottle_GEOTRC	bcodmo_name	String	bot_Nis
attribute	sample_bottle_GEOTRC	description	String	Unique identification numbers given to samples taken from bottles; rangies from 1 to 24; often used synonymously with bottle number. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Sample #', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
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	bottle
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. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Bottle number', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute	bottle_GEOTRC	long_name	String	Bottle GEOTRC
attribute	bottle_GEOTRC	units	String	dimensionless
variable	month_gmt		byte
attribute	month_gmt	_FillValue	byte	127
attribute	month_gmt	actual_range	byte	10, 12
attribute	month_gmt	bcodmo_name	String	month_gmt
attribute	month_gmt	description	String	2-digit month of year (GMT). in the format mm (01 to 12)
attribute	month_gmt	long_name	String	Month Gmt
attribute	month_gmt	units	String	unitless
variable	day_gmt		String
attribute	day_gmt	bcodmo_name	String	day_gmt
attribute	day_gmt	description	String	2-digit day of month (GMT). in the format dd (01 to 31)
attribute	day_gmt	long_name	String	Day Gmt
attribute	day_gmt	units	String	unitless
variable	time_gmt		String
attribute	time_gmt	bcodmo_name	String	time_gmt
attribute	time_gmt	description	String	Time (GMT) in hours and minutes when the event occurred; 24-hour clock. in the format HHMM
attribute	time_gmt	long_name	String	Time Gmt
attribute	time_gmt	units	String	unitless
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	17.3497, 39.7014
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 in decimal degrees. North = Positive.
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	-69.8644, -9.6601
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 in decimal degrees. West = 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	d15N_NO3		float
attribute	d15N_NO3	_FillValue	float	NaN
attribute	d15N_NO3	actual_range	float	2.22, 14.58
attribute	d15N_NO3	bcodmo_name	String	dN15_NO3
attribute	d15N_NO3	colorBarMaximum	double	50.0
attribute	d15N_NO3	colorBarMinimum	double	0.0
attribute	d15N_NO3	description	String	Nitrate delta 15N, reported in units of permil vs. atmospheric N2.
attribute	d15N_NO3	long_name	String	Mole Concentration Of Nitrate In Sea Water
attribute	d15N_NO3	units	String	per mil
variable	d15N_NO3_sd		float
attribute	d15N_NO3_sd	_FillValue	float	NaN
attribute	d15N_NO3_sd	actual_range	float	0.0, 1.75
attribute	d15N_NO3_sd	bcodmo_name	String	standard deviation
attribute	d15N_NO3_sd	colorBarMaximum	double	50.0
attribute	d15N_NO3_sd	colorBarMinimum	double	0.0
attribute	d15N_NO3_sd	description	String	Standard deviation of d15N_NO3.
attribute	d15N_NO3_sd	long_name	String	D15 N NO3 Sd
attribute	d15N_NO3_sd	units	String	per mil
variable	n		byte
attribute	n	_FillValue	byte	127
attribute	n	actual_range	byte	2, 6
attribute	n	bcodmo_name	String	numb_obs
attribute	n	description	String	n; number of observations/measurements.
attribute	n	long_name	String	N
attribute	n	units	String	dimensionless
variable	flag_low_area		String
attribute	flag_low_area	bcodmo_name	String	q_flag
attribute	flag_low_area	description	String	Samples that contained major ion peak areas (m/z 44) less than 1 volt-second are flagged at "low area". The flagged samples should be treated with caution.
attribute	flag_low_area	long_name	String	Flag Low Area
attribute	flag_low_area	units	String	dimensionless
variable	flag_low_conc		String
attribute	flag_low_conc	bcodmo_name	String	q_flag
attribute	flag_low_conc	description	String	Samples analyzed with concentrations below 0.3 uM are were flagged as "low concentration". The flagged samples should be treated with caution.
attribute	flag_low_conc	long_name	String	Flag Low Conc
attribute	flag_low_conc	units	String	dimensionless
variable	ISO_DateTime_UTC		String
attribute	ISO_DateTime_UTC	bcodmo_name	String	ISO_DateTime_UTC
attribute	ISO_DateTime_UTC	description	String	Date/Time (UTC) of the cast formatted to the ISO8601 standard. T indicates start of time string; Z indicates UTC. in the format YYYY-mm-ddTHH:MM:SS.ssZ
attribute	ISO_DateTime_UTC	long_name	String	ISO Date Time UTC
attribute	ISO_DateTime_UTC	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/
attribute	ISO_DateTime_UTC	source_name	String	ISO_DateTime_UTC
attribute	ISO_DateTime_UTC	time_precision	String	1970-01-01T00:00:00.00Z
attribute	ISO_DateTime_UTC	units	String	unitless
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.28719608E9, NaN
attribute	time	axis	String	T
attribute	time	bcodmo_name	String	ISO_DateTime_UTC
attribute	time	description	String	Date and time (UTC) that the bottle was fired, 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	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.