ERDDAP > info > bcodmo_dataset_747341

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	Planktic foraminifer shell d15N from Oceanic Flux Program (OFP) sediment traps in the Sargasso Sea		I   M	background			BCO-DMO	bcodmo_dataset_747341

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	Planktic foraminifer shells were picked from Oceanic Flux Program (OFP) sediment traps at 500 m, 1500 m, and 3200 m water depth (Conte et al., 2001; Conte and Weber, 2014). After crushing and the appropriate cleaning steps (Ren et al., 2012; Ren et al., 2015), shell-bound N was released by dissolution with hydrochloric acid, and organic N converted to nitrate using a basic persulfate oxidising reagent (POR; a potassium persulfate/sodium hydroxide solution) (Nydahl, 1978; Knapp et al., 2005). The \"denitrifier method\"\u00a0was used to convert sample nitrate to N2O gas for isotope analysis (Sigman et al., 2001; Casciotti et al., 2002; Weigand et al., 2016). See methods section of Smart et al. (2018) for more details of sample collection, isotope analysis and data quality. The isotopic composition of N2O was measured at Princeton University by GC- IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N2O extraction and purification system. See methods section of Smart et al. (2018) for more details of sample collection, isotope analysis and data quality.
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	Foraminifer shell-bound nitrogen isotopes from Sargasso Sea sediment traps Data published in: Smart et al. (2018) - https://doi.org/10.1016/j.gca.2018.05.023 PI: Daniel M. Sigman (Princeton) Contact: Sandi Smart (Stellenbosch University & The Max Planck Institute for Chemistry) Version date: 02 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	2018-10-03T19:33:15Z
attribute	NC_GLOBAL	date_modified	String	2020-01-10T19:26:21Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.747341.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/747341
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 isotopic composition of N2O was measured at Princeton University by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N2O extraction and purification system.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	747349
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	Thermo MAT 253
attribute	NC_GLOBAL	instruments_1_acronym	String	Plankton Net
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	Living planktic foraminifera were collected for tissue N analysis 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.
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	747350
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	keywords	String	1500m, 3200m, 500m, bco, bco-dmo, biological, chemical, content, d15, d15N, data, dataset, date, dmo, erddap, individuals, management, N_content, num, num_individuals_1500m, num_individuals_3200m, num_individuals_500m, num_individuals_TOTAL, oceanography, office, preliminary, species, total, Total_N, weight
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/747341/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/747341
attribute	NC_GLOBAL	param_mapping	String	{'747341': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/747341/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	Planktic foraminifer shell d15N from sediment traps in the Sargasso Sea (off Bermuda) in the western subtropical North Atlantic. Sediment traps from 500 m, 1500 m, and 3200 m water depth (31\u00b050\u2019N, 64\u00b010\u2019W).
attribute	NC_GLOBAL	title	String	Planktic foraminifer shell d15N from Oceanic Flux Program (OFP) sediment traps in the Sargasso Sea
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	species		String
attribute	species	bcodmo_name	String	taxon
attribute	species	description	String	Name of species
attribute	species	long_name	String	Species
attribute	species	units	String	unitless
variable	date		int
attribute	date	_FillValue	int	2147483647
attribute	date	actual_range	int	20091123, 20101109
attribute	date	bcodmo_name	String	date
attribute	date	description	String	Date of sample collection (format: yyyymmdd)
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	num_individuals_500m		short
attribute	num_individuals_500m	_FillValue	short	32767
attribute	num_individuals_500m	actual_range	short	0, 200
attribute	num_individuals_500m	bcodmo_name	String	number
attribute	num_individuals_500m	description	String	Number of individuals collected at 500 meters
attribute	num_individuals_500m	long_name	String	Num Individuals 500m
attribute	num_individuals_500m	units	String	unitless
variable	num_individuals_1500m		short
attribute	num_individuals_1500m	_FillValue	short	32767
attribute	num_individuals_1500m	actual_range	short	0, 200
attribute	num_individuals_1500m	bcodmo_name	String	number
attribute	num_individuals_1500m	description	String	Number of individuals collected at 1500 meters
attribute	num_individuals_1500m	long_name	String	Num Individuals 1500m
attribute	num_individuals_1500m	units	String	unitless
variable	num_individuals_3200m		short
attribute	num_individuals_3200m	_FillValue	short	32767
attribute	num_individuals_3200m	actual_range	short	0, 200
attribute	num_individuals_3200m	bcodmo_name	String	number
attribute	num_individuals_3200m	description	String	Number of individuals collected at 3200 meters
attribute	num_individuals_3200m	long_name	String	Num Individuals 3200m
attribute	num_individuals_3200m	units	String	unitless
variable	num_individuals_TOTAL		short
attribute	num_individuals_TOTAL	_FillValue	short	32767
attribute	num_individuals_TOTAL	actual_range	short	13, 450
attribute	num_individuals_TOTAL	bcodmo_name	String	number
attribute	num_individuals_TOTAL	description	String	Total number of individuals
attribute	num_individuals_TOTAL	long_name	String	Num Individuals TOTAL
attribute	num_individuals_TOTAL	units	String	unitless
variable	d15N		float
attribute	d15N	_FillValue	float	NaN
attribute	d15N	actual_range	float	0.81, 6.6
attribute	d15N	bcodmo_name	String	d15N
attribute	d15N	description	String	d15N (per mil vs. AIR) 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	long_name	String	D15 N
attribute	d15N	units	String	per mil
variable	Total_N		float
attribute	Total_N	_FillValue	float	NaN
attribute	Total_N	actual_range	float	2.63, 29.62
attribute	Total_N	bcodmo_name	String	N
attribute	Total_N	description	String	Total Nitrogen
attribute	Total_N	long_name	String	Total N
attribute	Total_N	units	String	nanomoles (nmol)
variable	weight		float
attribute	weight	_FillValue	float	NaN
attribute	weight	actual_range	float	0.47, 5.58
attribute	weight	bcodmo_name	String	weight
attribute	weight	description	String	Weight of sample
attribute	weight	long_name	String	Weight
attribute	weight	units	String	milligrams (mg)
variable	N_content		float
attribute	N_content	_FillValue	float	NaN
attribute	N_content	actual_range	float	2.36, 9.29
attribute	N_content	bcodmo_name	String	N
attribute	N_content	description	String	Nitrogen content
attribute	N_content	long_name	String	N Content
attribute	N_content	units	String	nanomoles per milligram (nmol/mg)

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.