ERDDAP > info > bcodmo_dataset_555691

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	Nitrate + nitrite concentration and d15N from the Eastern Tropical South Pacific collected on the R/V Atlantis (AT15-61) and R/V Melville (MV1104) in 2010-2011 (N2 fixation ETSP project, Microbial Nitrification project)		I   M	background			BCO-DMO	bcodmo_dataset_555691

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	Water column sample collection:\u00a0Samples were collected on the R/V Atlantis in January through February 2010, and the R/V Melville in March through April 2011 on a zonal transect along 20\u00ba S between 80\u00ba W and 100\u00ba W, with exact station locations and sample depths, nutrient concentrations and isotopic compositions reported below. Water column samples were collected by Niskin bottles deployed on a rosette equipped with conductivity-temperature-depth (CTD) sensors. All samples were collected into acid-washed, sample-rinsed HDPE bottles, and samples from the upper 400 m passed a 0.2 \u00b5m filter before collection. All samples were stored at -20\u00ba C until analysis on land. Nitrate plus nitrite (NO3-+NO2-) concentration: The concentration of NO3-+NO2- ([NO3-+NO2-]) was determined using chemiluminescent analysis (in a configuration with a detection limit of 0.05 \u00b5M, + 0.1 \u00b5M 1 S.D.). Reference: Braman, R. S. & Hendrix, S. A. Nanogram Nitrite and Nitrate Determination in Environmental and Biological-Materials by Vanadium(Iii) Reduction with Chemi-Luminescence Detection. Analytical Chemistry 61, 2715-2718 (1989). \u00a0----- NO3+NO2 d15N: The d15N of NO3+NO2 was determined using the denitrified method on samples with >0.3 \u00b5M NO3+NO2 with a standard deviation <0.2 per mil. References: Sigman, D. M. et al. A bacterial method for the nitrogen isotopic analysis of nitrate in seawater and freshwater. Analytical Chemistry 73, 4145-4153 (2001). Casciotti, K. L., Sigman, D. M., Hastings, M. G., Bohlke, J. K. & Hilkert, A. Measurement of the oxygen isotopic composition of nitrate in seawater and freshwater using the denitrifier method. Analytical Chemistry 74, 4905-4912 (2002). McIlvin, M. R. & Casciotti, K. L. Technical Updates to the Bacterial Method for Nitrate Isotopic Analyses. Analytical Chemistry 83, 1850-1856 (2011).
attribute	NC_GLOBAL	awards_0_award_nid	String	55039
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-0850801
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0850801
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	awards_1_award_nid	String	55105
attribute	NC_GLOBAL	awards_1_award_number	String	OCE-0850905
attribute	NC_GLOBAL	awards_1_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0850905
attribute	NC_GLOBAL	awards_1_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_1_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_1_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_1_program_manager	String	Donald L. Rice
attribute	NC_GLOBAL	awards_1_program_manager_nid	String	51467
attribute	NC_GLOBAL	awards_2_award_nid	String	555515
attribute	NC_GLOBAL	awards_2_award_number	String	OCE-0961098
attribute	NC_GLOBAL	awards_2_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0961098
attribute	NC_GLOBAL	awards_2_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_2_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_2_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_2_program_manager	String	Donald L. Rice
attribute	NC_GLOBAL	awards_2_program_manager_nid	String	51467
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	nitrates and nitrites A. Knapp (FSU) et al version: 2015-04-09
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	2015-04-10T15:02:51Z
attribute	NC_GLOBAL	date_modified	String	2016-08-20T03:10:46Z
attribute	NC_GLOBAL	defaultDataQuery	String	&amp;time&lt;now
attribute	NC_GLOBAL	doi	String	10.1575/1912/7227
attribute	NC_GLOBAL	Easternmost_Easting	double	-80.0
attribute	NC_GLOBAL	geospatial_lat_max	double	-15.0
attribute	NC_GLOBAL	geospatial_lat_min	double	-20.0
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-80.0
attribute	NC_GLOBAL	geospatial_lon_min	double	-100.0
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	400.0
attribute	NC_GLOBAL	geospatial_vertical_min	double	0.0
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/555691
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	CTD
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	555710
attribute	NC_GLOBAL	instruments_0_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_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/130/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	CTD profiler
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	417
attribute	NC_GLOBAL	instruments_0_supplied_name	String	CTD
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, chemical, chemistry, concentration, cruise, cruise_id, data, dataset, date, del15, del15N_NO3NO2, del15N_NO3NO2_sd, density, depth, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Nitrate, Earth Science > Oceans > Salinity/Density > Density, erddap, latitude, longitude, management, mole, mole_concentration_of_nitrate_in_sea_water, n02, nitrate, nitrite, no2, no3, NO3_NO2, NO3_NO2_sd, ocean, oceanography, oceans, office, preliminary, salinity, science, sea, sea_water_sigma_theta, seawater, sigma, sigma_theta, station, theta, time, water
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/555691/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/555691
attribute	NC_GLOBAL	Northernmost_Northing	double	-15.0
attribute	NC_GLOBAL	param_mapping	String	{'555691': {'lat': 'master - latitude', 'depth': 'master - depth', 'lon': 'master - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/555691/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of Southern California
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	USC-WIES
attribute	NC_GLOBAL	people_0_person_name	String	Douglas G. Capone
attribute	NC_GLOBAL	people_0_person_nid	String	50669
attribute	NC_GLOBAL	people_0_role	String	Lead Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	University of Southern California
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	USC-WIES
attribute	NC_GLOBAL	people_1_person_name	String	William M. Berelson
attribute	NC_GLOBAL	people_1_person_nid	String	50600
attribute	NC_GLOBAL	people_1_role	String	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
attribute	NC_GLOBAL	people_2_person_name	String	Karen L. Casciotti
attribute	NC_GLOBAL	people_2_person_nid	String	50980
attribute	NC_GLOBAL	people_2_role	String	Principal Investigator
attribute	NC_GLOBAL	people_2_role_type	String	originator
attribute	NC_GLOBAL	people_3_affiliation	String	University of Miami Rosenstiel School of Marine and Atmospheric Science
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	UM-RSMAS
attribute	NC_GLOBAL	people_3_person_name	String	Dennis Hansell
attribute	NC_GLOBAL	people_3_person_nid	String	50539
attribute	NC_GLOBAL	people_3_role	String	Principal Investigator
attribute	NC_GLOBAL	people_3_role_type	String	originator
attribute	NC_GLOBAL	people_4_affiliation	String	University of Miami Rosenstiel School of Marine and Atmospheric Science
attribute	NC_GLOBAL	people_4_affiliation_acronym	String	UM-RSMAS
attribute	NC_GLOBAL	people_4_person_name	String	Angela N. Knapp
attribute	NC_GLOBAL	people_4_person_nid	String	555499
attribute	NC_GLOBAL	people_4_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_4_role_type	String	originator
attribute	NC_GLOBAL	people_5_affiliation	String	Florida State University
attribute	NC_GLOBAL	people_5_affiliation_acronym	String	FSU - EOAS
attribute	NC_GLOBAL	people_5_person_name	String	Angela N. Knapp
attribute	NC_GLOBAL	people_5_person_nid	String	555499
attribute	NC_GLOBAL	people_5_role	String	Contact
attribute	NC_GLOBAL	people_5_role_type	String	related
attribute	NC_GLOBAL	people_6_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_6_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_6_person_name	String	Nancy Copley
attribute	NC_GLOBAL	people_6_person_nid	String	50396
attribute	NC_GLOBAL	people_6_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_6_role_type	String	related
attribute	NC_GLOBAL	project	String	N2 fixation ETSP,Microbial Nitrification
attribute	NC_GLOBAL	projects_0_acronym	String	N2 fixation ETSP
attribute	NC_GLOBAL	projects_0_description	String	Description from NSF award abstract: Several independent lines of geochemical and remote sensing evidence suggest that dinitrogen (N2) fixation may be associated with surface waters downstream of major oxygen minimum zones (OMZs) and in particular in the Eastern Tropical South Pacific (ETSP). However, little direct evidence supports these inferences. Besides substantiating these indirect assessments, documenting significant N2 fixation in the ETSP would provide insight into two longstanding controversies: Is the marine N budget balanced, as implied by modeling and paleoceanographic data, and if so, how are the processes that add and remove N spatially, and thus temporally coupled? In this project researchers at the University of Southern California and the University of Miami will test the hypothesis that fixation occurs in the ETSP at areal rates that equal or exceed those previously documented in more well-studied regions such as the oligotrophic waters of the sub/tropical North Atlantic. If scaled to the surface area of ETSP waters, this could add an additional 10-50 Tg N per year of inputs to the global marine N budget. They will undertake two cruises in the ETSP during early and late summer in two consecutive years to assess the quantitative significance of N2 fixation as a source of new N to surface waters using complementary biological and geochemical tools. N2 fixation rates will be evaluated on two temporal/spatial scales: daily/local (bottle 15N2 incubations and floating sediment traps); and seasonal/regional (d15N budget using moored sediment traps and water column TDN d15N). These estimates provide detailed observations of potential N2 fixation during station occupation in two summer seasons, when rates are expected to be greatest, as well as prolonged observation over lower expected N2 fixation periods. A combination of these different estimates will aim to determine if N2 fixation in this region can help balance the marine N budget. If all goes as planned, this study will determine the quantitative importance of N2 fixation in the ETSP, and whether these previously undocumented rates can help resolve the marine N budget. Implications include the ability of the marine N cycle to maintain homeostasis, and thus the global C cycle on glacial/interglacial time scales.
attribute	NC_GLOBAL	projects_0_end_date	String	2012-07
attribute	NC_GLOBAL	projects_0_geolocation	String	Eastern Tropical South Pacific
attribute	NC_GLOBAL	projects_0_name	String	Collaborative Research: Documenting N2 fixation in N deficient waters of the Eastern Tropical South Pacific
attribute	NC_GLOBAL	projects_0_project_nid	String	555496
attribute	NC_GLOBAL	projects_0_start_date	String	2009-08
attribute	NC_GLOBAL	projects_1_acronym	String	Microbial Nitrification
attribute	NC_GLOBAL	projects_1_description	String	Description from NSF award abstract: Closing the marine budgets of nitrate and nitrous oxide are central goals for researchers interested in nutrient-driven changes in primary productivity and climate change. With the implementation of new methods for oxygen isotopic analysis of seawater nitrate, it will be possible to construct a budget for nitrate based on its oxygen isotopic distribution that is complementary to nitrogen isotope budgets. Before we can effectively use oxygen isotopes in nitrate to inform the current understanding of the marine nitrogen cycle, we must first understand how different processes that produce (nitrification) and consume (assimilation, denitrification) nitrate affect its oxygen isotopic signature. In this study, researchers at the Woods Hole Oceanographic Institution will provide a quantitative assessment of the oxygen isotopic systematics of nitrification in the field and thus fill a key gap in our understanding of 18O variations in nitrate, nitrite, and nitrous oxide. The primary goal is to develop a quantitative prediction of the oxygen isotopic signatures of nitrite and nitrate produced during nitrification in the sea. The researchers hypothesize that oxygen isotopic fractionation during nitrification is the primary factor setting the 18O values of newly produced nitrate and nitrite. Secondly, they hypothesize that oxygen atom exchange is low where ammonia oxidation and nitrite oxidation are tightly coupled, but may increase in regions with nitrite accumulation, such as in the primary and secondary nitrite maxima. They will test these hypotheses with a series of targeted laboratory and field experiments, as well as with measurements of nitrite and nitrate isotopic distributions extending through the euphotic zone, primary nitrite maximum, and secondary nitrite maximum of the Eastern Tropical South Pacific. The results of these experiments are expected to provide fundamental information required for the interpretation of 18O isotopic signatures in nitrite, nitrate, and N2O in the context of underlying microbial processes. A better understanding of these features and the processes involved is important for quantifying new production, controls on the N budget, and N2O production in the ocean -- which should lead to a better understanding of the direct and indirect interactions among the nitrogen cycle, marine chemistry, and climate.
attribute	NC_GLOBAL	projects_1_end_date	String	2011-07
attribute	NC_GLOBAL	projects_1_geolocation	String	Eastern Tropical South Pacific
attribute	NC_GLOBAL	projects_1_name	String	Expression of Microbial Nitrification in the Stable Isotopic Systematics of Oceanic Nitrite and Nitrate
attribute	NC_GLOBAL	projects_1_project_nid	String	555516
attribute	NC_GLOBAL	projects_1_start_date	String	2010-04
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	-20.0
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Nitrate + nitrite concentration and d15N from the Eastern Tropical South Pacific, 2010-2011
attribute	NC_GLOBAL	title	String	Nitrate + nitrite concentration and d15N from the Eastern Tropical South Pacific collected on the R/V Atlantis (AT15-61) and R/V Melville (MV1104) in 2010-2011 (N2 fixation ETSP project, Microbial Nitrification project)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-100.0
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	cruise_id
attribute	cruise_id	long_name	String	Cruise Id
attribute	cruise_id	units	String	unitless
variable	date		String
attribute	date	bcodmo_name	String	date_local
attribute	date	description	String	sample collection date (local) in yyyy-mm-dd format
attribute	date	long_name	String	Date
attribute	date	source_name	String	date
attribute	date	time_precision	String	1970-01-01
attribute	date	units	String	unitless
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	-20.0, -15.0
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; north is 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	-100.0, -80.0
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; east is positive
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	station		byte
attribute	station	_FillValue	byte	127
attribute	station	actual_range	byte	1, 13
attribute	station	bcodmo_name	String	sta
attribute	station	description	String	station
attribute	station	long_name	String	Station
attribute	station	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	0.0, 400.0
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	sample depth
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	sigma_theta		float
attribute	sigma_theta	_FillValue	float	NaN
attribute	sigma_theta	actual_range	float	24.223, 28.75
attribute	sigma_theta	bcodmo_name	String	sigma_theta
attribute	sigma_theta	description	String	seawater density
attribute	sigma_theta	long_name	String	Sea Water Sigma Theta
attribute	sigma_theta	units	String	unitless
variable	NO3_NO2		float
attribute	NO3_NO2	_FillValue	float	NaN
attribute	NO3_NO2	actual_range	float	0.0, 41.9
attribute	NO3_NO2	bcodmo_name	String	NO3_NO2
attribute	NO3_NO2	colorBarMaximum	double	50.0
attribute	NO3_NO2	colorBarMinimum	double	0.0
attribute	NO3_NO2	description	String	nitrate + nitrite concentration
attribute	NO3_NO2	long_name	String	Mole Concentration Of Nitrate In Sea Water
attribute	NO3_NO2	units	String	micro mols N per liter
variable	NO3_NO2_sd		float
attribute	NO3_NO2_sd	_FillValue	float	NaN
attribute	NO3_NO2_sd	actual_range	float	0.0, 2.0
attribute	NO3_NO2_sd	bcodmo_name	String	standard deviation
attribute	NO3_NO2_sd	colorBarMaximum	double	50.0
attribute	NO3_NO2_sd	colorBarMinimum	double	0.0
attribute	NO3_NO2_sd	description	String	nitrate + nitrite concentration standard deviation
attribute	NO3_NO2_sd	long_name	String	NO3 NO2 Sd
attribute	NO3_NO2_sd	units	String	micro mols N per liter
variable	del15N_NO3NO2		float
attribute	del15N_NO3NO2	_FillValue	float	NaN
attribute	del15N_NO3NO2	actual_range	float	8.1, 19.8
attribute	del15N_NO3NO2	bcodmo_name	String	15N of nitrate plus nitrite
attribute	del15N_NO3NO2	description	String	delta 15N of nitrate + nitrite, reported in units of permil vs. atmospheric N2
attribute	del15N_NO3NO2	long_name	String	Del15 N NO3 NO2
attribute	del15N_NO3NO2	units	String	per mil versus air
variable	del15N_NO3NO2_sd		float
attribute	del15N_NO3NO2_sd	_FillValue	float	NaN
attribute	del15N_NO3NO2_sd	actual_range	float	0.0, 1.3
attribute	del15N_NO3NO2_sd	bcodmo_name	String	standard deviation
attribute	del15N_NO3NO2_sd	colorBarMaximum	double	50.0
attribute	del15N_NO3NO2_sd	colorBarMinimum	double	0.0
attribute	del15N_NO3NO2_sd	description	String	delta 15N of nitrate + nitrite; 1 standard deviation, reported in units of permil vs. atmospheric N2
attribute	del15N_NO3NO2_sd	long_name	String	Del15 N NO3 NO2 Sd
attribute	del15N_NO3NO2_sd	units	String	per mil versus air

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.