ERDDAP > info > bcodmo_dataset_746854

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	[d15N of PON from Net Tows] - d15N of size-fractionated particulate organic nitrogen (PON) from net tows in the Sargasso Sea at BATS and Hydro Station S (Understanding the nitrogen isotopes of planktonic foraminifera: A modern Sargasso Sea study)		I   M	background			BCO-DMO	bcodmo_dataset_746854

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
attribute	NC_GLOBAL	acquisition_description	String	PON samples were collected from the upper 200 m of the water column using a 1-m2, 200-um-mesh plankton net aboard the R/V Atlantic Explorer during ten cruises between July 2011 and November 2013. Approximately 10% of the tow material was size-fractionated and freeze-dried for elemental and isotopic analysis of PON. See methods section of Smart et al. (2018) for more details of sample collection, isotope analysis, and data quality. The d15N of tow-collected, size-fractionated PON was determined by elemental analyzer-isotope ratio mass spectrometry (an Elementar Vario Isotope Cube online to an Elementar Isoprime visION), referencing to atmospheric N2 using USGS-40 and an in-house aminocaproic acid standard.
attribute	NC_GLOBAL	awards_0_award_nid	String	55176
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-0960802
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward?AWD_ID=0960802
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	544342
attribute	NC_GLOBAL	awards_1_award_number	String	OCE-1136345
attribute	NC_GLOBAL	awards_1_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1136345
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	David L. Garrison
attribute	NC_GLOBAL	awards_1_program_manager_nid	String	50534
attribute	NC_GLOBAL	awards_2_award_nid	String	558188
attribute	NC_GLOBAL	awards_2_award_number	String	OCE-1060947
attribute	NC_GLOBAL	awards_2_data_url	String	http://www.nsf.gov/awardsearch/showAward?AWD_ID=1060947
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	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_2_program_manager_nid	String	51517
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Size-fractionated particulate organic nitrogen isotopes from Sargasso Sea plankton net tows Data published in: Smart et al. (2018) - https://doi.org/10.1016j.gca.2018.05.023 PI: Daniel M. Sigman (Princeton) Contact: Sandi Smart (Stellenbosch University & The Max Planck Institute for Chemistry) Version date: 01 October 2018 -999 = missing data
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	2018-10-01T18:23:33Z
attribute	NC_GLOBAL	date_modified	String	2020-01-10T18:56:24Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.746854.1
attribute	NC_GLOBAL	geospatial_vertical_max	double	220.0
attribute	NC_GLOBAL	geospatial_vertical_min	double	7.0
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/746854
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	IR Mass Spec
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	The d15N of tow-collected, size-fractionated PON was determined by elemental analyzer-isotope ratio mass spectrometry (an Elementar Vario Isotope Cube online to an Elementar Isoprime visION), referencing to atmospheric N2 using USGS-40 and an in-house aminocaproic acid standard.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	746870
attribute	NC_GLOBAL	instruments_0_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_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB16/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Isotope-ratio Mass Spectrometer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	469
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Elementar Isoprime visION
attribute	NC_GLOBAL	instruments_1_acronym	String	Plankton Net
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	PON samples were collected from the upper 200 m of the water column using a 1-m2, 200-μm-mesh plankton net.
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	746869
attribute	NC_GLOBAL	instruments_1_description	String	A Plankton Net is a generic term for a sampling net that is used to collect plankton. It is used only when detailed instrument documentation is not available.
attribute	NC_GLOBAL	instruments_1_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/22/
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Plankton Net
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	525
attribute	NC_GLOBAL	instruments_1_supplied_name	String	mesh plankton net
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	The d15N of tow-collected, size-fractionated PON was determined by elemental analyzer-isotope ratio mass spectrometry (an Elementar Vario Isotope Cube online to an Elementar Isoprime visION), referencing to atmospheric N2 using USGS-40 and an in-house aminocaproic acid standard.
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	746871
attribute	NC_GLOBAL	instruments_2_description	String	Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.
attribute	NC_GLOBAL	instruments_2_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB01/
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Elemental Analyzer
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	546339
attribute	NC_GLOBAL	instruments_2_supplied_name	String	Elementar Vario Isotope Cube
attribute	NC_GLOBAL	keywords	String	average, bco, bco-dmo, biological, chemical, cruise, d15, d15N_AVG, d15N_stdev, data, dataset, date, depth, deviation, dmo, erddap, fraction, management, measurements, num, num_measurements, oceanography, office, preliminary, size, size_fraction, standard, standard deviation, stdev
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/746854/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/746854
attribute	NC_GLOBAL	param_mapping	String	{'746854': {'depth': 'master - depth'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/746854/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Princeton University
attribute	NC_GLOBAL	people_0_person_name	String	Daniel M. Sigman
attribute	NC_GLOBAL	people_0_person_nid	String	51417
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	Stellenbosch University
attribute	NC_GLOBAL	people_1_person_name	String	Sandi M. Smart
attribute	NC_GLOBAL	people_1_person_nid	String	557790
attribute	NC_GLOBAL	people_1_role	String	Contact
attribute	NC_GLOBAL	people_1_role_type	String	related
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	N Isotopes Foraminifera
attribute	NC_GLOBAL	projects_0_acronym	String	N Isotopes Foraminifera
attribute	NC_GLOBAL	projects_0_description	String	NSF Award Abstract: Nitrogen (N) and phosphorus are the two nutrients required in large quantity by phytoplankton in the ocean, and together they limit productivity throughout most of the tropical, subtropical, and temperate ocean. Both the cycling of N and its input/output budget have been argued to control the fertility of the ocean and the ocean's role in setting atmospheric CO2. The CaCO3 tests of foraminifera can represent a substantial fraction of marine sediments and have been used extensively in paleoceanography; they are an obvious target for isotopic analysis of microfossil-bound organic matter. In recent years, researchers at Princeton have developed a protocol for the isotopic analysis of foraminiferal shell-bound N. The current protocol is at least 100 times more sensitive than typical on-line combustion, allowing for rapid progress with a N isotope archive that was previously not feasible to measure. Measurements on surface sediments and a downcore record from the Caribbean show the promise of foraminifera-bound del15N (fb-del15N) to provide both a robust N isotope archive for paleoceanography, and one with a unique potential of richness, given the existence of multiple foraminiferal species with different depth habitats and behaviors. Moreover, the finding from the Caribbean Sea record -- reduced N fixation in ice age Atlantic -- has changed the scientific conversation about the nature of the input/output budget of oceanic fixed N and its potential to change ocean fertility and atmospheric CO2. However, the controls on fb-del15N have not yet been adequately studied. In this project, as a first major step in developing a foundation for the paleoceanographic application of fb-del15N, the same Princeton University team will study its genesis in the water column, transport to the seafloor, and early diagenesis. They will undertake this study in the Sargasso Sea south of Bermuda. This is one of the best studied regions of the ocean, in general and with respect to foraminifera, and a region that has been has been a focus of the N isotope research of the PI for the last decade and others previously. Moreover, its significant seasonality -- in physical oceanography, biogeochemistry, and foraminiferal species abundance -- will facilitate the effort to understand the controls on fb-del15N at a mechanistic level. The research team will participate in six Bermuda Atlantic Time-series Study (BATS) cruises over two years, collecting foraminifera and other N forms likely to provide insight into the controls on fb-del15N. From the nearby Oceanic Flux Program (OFP) moored sediment traps and from shallow sediments collected in the region, they will pick foraminifera shells and again make relevant ancillary measurements. This work will establish the relationship of foraminiferal biomass to shell-bound del15N for different species, and comparison of the foraminiferal isotope data with the upper ocean N pools will yield empirical isotopic relationships and work toward a mechanistic insight of fb-del15N (e.g., the importance of different N pools to the diets of different foraminifera; the role of algal symbionts). The sediment trap and surface sediment data will support the plankton tow data by integrating over longer time scales and will also address questions regarding late stage (e.g., gametogenic) calcification and the early diagenesis of fb-del15N and fb-N content. Broader Impacts: This study will yield an improved understanding of the nutrient dynamics of foraminifera, a class of organisms whose shells are a central tool in micropaleontology and paleoclimatology. The project will also build on the principal investigator's involvement in the Bermuda Institute of Ocean Sciences as an asset for integrating ocean-related education and research at both the undergraduate and graduate levels.
attribute	NC_GLOBAL	projects_0_end_date	String	2016-03
attribute	NC_GLOBAL	projects_0_geolocation	String	Sargasso Sea
attribute	NC_GLOBAL	projects_0_name	String	Understanding the nitrogen isotopes of planktonic foraminifera: A modern Sargasso Sea study
attribute	NC_GLOBAL	projects_0_project_nid	String	743583
attribute	NC_GLOBAL	projects_0_start_date	String	2011-04
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	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	d15N of size-fractionated particulate organic nitrogen (PON) from net tows in the Sargasso Sea (off Bermuda) in the western subtropical North Atlantic. Net tow samples from 0-200 m at BATS (31\u00b040\u2019N, 64\u00b010\u2019W) and Hydro Station S (32\u00b010\u2019N, 64\u00b034\u2019W).
attribute	NC_GLOBAL	title	String	[d15N of PON from Net Tows] - d15N of size-fractionated particulate organic nitrogen (PON) from net tows in the Sargasso Sea at BATS and Hydro Station S (Understanding the nitrogen isotopes of planktonic foraminifera: A modern Sargasso Sea study)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	cruise		String
attribute	cruise	bcodmo_name	String	cruise_id
attribute	cruise	description	String	Cruise identifier
attribute	cruise	long_name	String	Cruise
attribute	cruise	units	String	unitless
variable	date		String
attribute	date	bcodmo_name	String	date
attribute	date	description	String	Date of collection (month and 2-digit year)
attribute	date	long_name	String	Date
attribute	date	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	date	units	String	unitless
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	NaN
attribute	depth	actual_range	double	7.0, 220.0
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	size_fraction		String
attribute	size_fraction	bcodmo_name	String	samp_fraction
attribute	size_fraction	description	String	Size fraction
attribute	size_fraction	long_name	String	Size Fraction
attribute	size_fraction	units	String	micrometers (um)
variable	d15N_AVG		float
attribute	d15N_AVG	_FillValue	float	NaN
attribute	d15N_AVG	actual_range	float	1.43, 6.56
attribute	d15N_AVG	bcodmo_name	String	d15N
attribute	d15N_AVG	description	String	Average d15N (per mil vs. AIR). d15N is the nitrogen isotopic composition of a sample expressed in delta notation (d15N in units of per mil, ‰) relative to atmospheric N2, where d15N = {[(15N/14N)sample/(15N/14N)atmN2] – 1} × 1000.
attribute	d15N_AVG	long_name	String	D15 N AVG
attribute	d15N_AVG	units	String	per mil
variable	d15N_stdev		float
attribute	d15N_stdev	_FillValue	float	NaN
attribute	d15N_stdev	actual_range	float	0.0, 0.55
attribute	d15N_stdev	bcodmo_name	String	d15N
attribute	d15N_stdev	description	String	Standard deviation of d15N_AVG
attribute	d15N_stdev	long_name	String	D15 N Stdev
attribute	d15N_stdev	units	String	per mil
variable	num_measurements		byte
attribute	num_measurements	_FillValue	byte	127
attribute	num_measurements	actual_range	byte	2, 6
attribute	num_measurements	bcodmo_name	String	numb_obs
attribute	num_measurements	description	String	Number of measurements
attribute	num_measurements	long_name	String	Num Measurements
attribute	num_measurements	units	String	unitless

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.