ERDDAP > info > bcodmo_dataset_771344

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	Record of abundance and \u03b42H of dinosterol in down core lake sediments from T Lake, Palau collected in September 2013		I   M	background			BCO-DMO	bcodmo_dataset_771344

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	Methods are as per \"Southward Shift of the Pacific ITCZ During the Holocene\" in Paleoceanography and Paleoclimatology, volume 33, pages 1383-1395 (Sachs et al. 2018). Sediment core PTLN\u2010PC1 was collected September 2013 in sequential 1m sections using a 5cm\u2010diameter Colinvaux\u2010Vohnout Livingstone\u2010type rod\u2010operated piston corer (Geocore, Columbus, Ohio). Each section was sealed in the field and refrigerated at 4 \u00b0C until core splitting and subsampling. Sample ages were linearly interpolated from calibrated 14C dates (see dataset \"T Lake PC1 Chronology\") using the Clam 2.2 (Blaauw, 2010) software package. Sediment subsamples were transferred to combusted glass vials, frozen, then freeze dried. Lipids were extracted with 10% methanol in dichloromethane on an accelerated solvent extractor (ASE 200; Dionex) at 100\u00b0C and 1500 psi with three 5\u2010min static cycles. Lipid extracts were saponified using 2:1 1N KOH in methanol:water at 70\u00b0C overnight. Saponified extracts were acidified to pH ~1 with HCl, neutral lipids extracted from the water/methanol phase with hexane, and the hexane extracts washed with water. Lipid extracts were acetylated at 70\u00b0C for 30 min in a mixture of 20 \u03bcl acetic anhydride of known isotopic composition and 20 \u03bcl pyridine. Sterol acetates were then isolated via preparative high\u2010performance liquid chromatography as per the methods in Nelson and Sachs (2013, 2014). Extracts were taken up in 25 \u03bcl of 2:1 dichloromethane:methanol and the complete volume injected onto an Agilent 1100 high\u2010performance liquid chromatography system equipped with a Zorbax Eclipse XDB C18 column; after an initial elution of polar compounds in 5:95 methanol:acetonitrile, sterol acetates were eluted with an isocratic mobile phase of 5:10:85 methanol:ethyl acetate:acetonitrile. Aliquots (5%) of each sample were injected on an Agilent 6890N GC with flame ionization detector and PTV inlet, equipped with an Agilent VF\u201017 ms column (60 m \u00d7 0.32 mm \u00d7 0.25 \u03bcm), in splitless mode at 300\u00b0C using helium carrier gas at 1.5 ml/min. The initial oven temperature was 110\u00b0C, followed by a ramp to 320\u00b0C at 5\u00b0C/min, and was then held for 20 min. Detector response was determined via an \u03b1\u2010cholestane internal standard. Dinosterol fluxes were calculated from the product of dinosterol concentration per gram dry weight of sediment, the linear sediment accumulation rate, and the dry bulk density of sediment. Uncertainty in dinosterol fluxes is conservatively assumed to be 25%. Hydrogen isotopes of dinosterol were measured via a modification of the procedures outlined in Nelson and Sachs (2013). Gas chromatography was conducted using a Thermo Trace GC Ultra equipped with a GC\u2010TC interface. Samples were injected into the 330\u00b0C inlet in splitless mode, with a 1.1 ml/min helium carrier flow through a VF\u201017 ms column (60 m \u00d7 0.25 mm \u00d7 0.25 \u03bcm). The oven temperature was held at 120\u00b0C for the 2\u2010min splitless time, increased to 260 \u00b0C at 20 \u00b0C/min, increased to 325\u00b0C at 1\u00b0C/min, and held for 10 min. The pyrolysis interface was operated at 1400\u00b0C, and the sample hydrogen admitted to a Thermo Delta V Plus isotope ratio mass spectrometer via open split. Isotope measurements are given as \u03b4\u00b2>H values relative to Vienna Standard Mean Ocean Water and calibrated via external isotope standards (Arndt Schimmelmann, Indiana University). Secondary corrections were determined based on time\u2010in\u2010sequence, retention time, and peak area, as necessary, on a sequence\u2010by\u2010sequence basis. Each sample analyzed at least three times. \u03b4\u00b2H values were corrected for added acetate hydrogen (\u2212124.4\u2030 \u00b1 8.1) via mass balance. Uncertainty is given as the standard deviation of these replicate analyses and uncertainty in the value of the known acetate, propagated through the mass balance calculation.
attribute	NC_GLOBAL	awards_0_award_nid	String	55103
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1241255
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1241255
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	David L. Garrison
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50534
attribute	NC_GLOBAL	awards_1_award_nid	String	55104
attribute	NC_GLOBAL	awards_1_award_number	String	OCE-1241247
attribute	NC_GLOBAL	awards_1_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1241247
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	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Abundance and d2H of dinosterol in down core lake sediments from T Lake, Palau PI: Julian P. Sachs (University of Washington) Co-PI: Michael Dawson (UC Merced) Version date: 19-June-2019
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	2019-06-19T19:31:14Z
attribute	NC_GLOBAL	date_modified	String	2019-06-24T17:25:13Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.771344.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/771344
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	Delta V Plus IRMS (Thermo). Isotope ratio mass spectrometer with continuous flow inlet, interfaced to open split in GC-TC interface.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	771407
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	Delta V Plus IRMS (Thermo)
attribute	NC_GLOBAL	instruments_1_acronym	String	HPLC
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	1100 HPLC system (Agilent). High performance liquid chromatograph, equipped with fraction collector for preparative separations.
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	771404
attribute	NC_GLOBAL	instruments_1_description	String	A High-performance liquid chromatograph (HPLC) is a type of liquid chromatography used to separate compounds that are dissolved in solution. HPLC instruments consist of a reservoir of the mobile phase, a pump, an injector, a separation column, and a detector. Compounds are separated by high pressure pumping of the sample mixture onto a column packed with microspheres coated with the stationary phase. The different components in the mixture pass through the column at different rates due to differences in their partitioning behavior between the mobile liquid phase and the stationary phase.
attribute	NC_GLOBAL	instruments_1_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB11/
attribute	NC_GLOBAL	instruments_1_instrument_name	String	High Performance Liquid Chromatograph
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	506
attribute	NC_GLOBAL	instruments_1_supplied_name	String	1100 HPLC system (Agilent)
attribute	NC_GLOBAL	instruments_2_acronym	String	Piston Corer
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	Colinvaux‐Vohnout Livingstone‐type rod‐operated piston corer (Geocore, Columbus, Ohio). Hand-operated sediment coring device.
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	771403
attribute	NC_GLOBAL	instruments_2_description	String	The piston corer is a type of bottom sediment sampling device. A long, heavy tube is plunged into the seafloor to extract samples of mud sediment. A piston corer uses a "free fall" of the coring rig to achieve a greater initial force on impact than gravity coring. A sliding piston inside the core barrel reduces inside wall friction with the sediment and helps to evacuate displaced water from the top of the corer. A piston corer is capable of extracting core samples up to 90 feet in length.
attribute	NC_GLOBAL	instruments_2_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/51/
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Piston Corer
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	519
attribute	NC_GLOBAL	instruments_2_supplied_name	String	Colinvaux‐Vohnout Livingstone‐type rod‐operated piston corer
attribute	NC_GLOBAL	instruments_3_acronym	String	Gas Chromatograph
attribute	NC_GLOBAL	instruments_3_dataset_instrument_description	String	6890N GC (Agilent). Gas chromatograph equipped with flame ionization detector and PTV (programmable temperature volatilization) inlet.
attribute	NC_GLOBAL	instruments_3_dataset_instrument_nid	String	771405
attribute	NC_GLOBAL	instruments_3_description	String	Instrument separating gases, volatile substances, or substances dissolved in a volatile solvent by transporting an inert gas through a column packed with a sorbent to a detector for assay. (from SeaDataNet, BODC)
attribute	NC_GLOBAL	instruments_3_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB02/
attribute	NC_GLOBAL	instruments_3_instrument_name	String	Gas Chromatograph
attribute	NC_GLOBAL	instruments_3_instrument_nid	String	661
attribute	NC_GLOBAL	instruments_3_supplied_name	String	6890N GC (Agilent)
attribute	NC_GLOBAL	instruments_4_acronym	String	Gas Chromatograph
attribute	NC_GLOBAL	instruments_4_dataset_instrument_description	String	Trace GC Ultra (Thermo). Gas chromatograph equipped with pyrolysis interface (GC-TC II) and split/splitless inlet.
attribute	NC_GLOBAL	instruments_4_dataset_instrument_nid	String	771406
attribute	NC_GLOBAL	instruments_4_description	String	Instrument separating gases, volatile substances, or substances dissolved in a volatile solvent by transporting an inert gas through a column packed with a sorbent to a detector for assay. (from SeaDataNet, BODC)
attribute	NC_GLOBAL	instruments_4_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB02/
attribute	NC_GLOBAL	instruments_4_instrument_name	String	Gas Chromatograph
attribute	NC_GLOBAL	instruments_4_instrument_nid	String	661
attribute	NC_GLOBAL	instruments_4_supplied_name	String	Trace GC Ultra (Thermo)
attribute	NC_GLOBAL	instruments_5_acronym	String	ASE
attribute	NC_GLOBAL	instruments_5_dataset_instrument_description	String	ASE 200 Accelerated Solvent Extractor (Dionex). High pressure/temperature solvent extractor.
attribute	NC_GLOBAL	instruments_5_dataset_instrument_nid	String	771409
attribute	NC_GLOBAL	instruments_5_description	String	Accelerated solvent extraction (ASE) is a method for extracting various chemicals from a complex solid or semisolid sample matrix. The process uses high temperature and pressure, which results in the extraction taking less time and requiring less solvent, and possibly also giving better analyte recovery, than traditional methods that use less extreme conditions.
attribute	NC_GLOBAL	instruments_5_instrument_name	String	Accelerated Solvent Extractor
attribute	NC_GLOBAL	instruments_5_instrument_nid	String	771408
attribute	NC_GLOBAL	instruments_5_supplied_name	String	ASE 200 Accelerated Solvent Extractor (Dionex)
attribute	NC_GLOBAL	keywords	String	1sig, age, age_ybp, bco, bco-dmo, biological, chemical, conc, conc_dino, data, dataset, dbd, depth, depth_cm, dino, dino_2H, dino_2H_1sig, dmo, erddap, flux, flux_dino, management, oceanography, office, preliminary, ybp
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/771344/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/771344
attribute	NC_GLOBAL	param_mapping	String	{'771344': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/771344/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of Washington
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	UW
attribute	NC_GLOBAL	people_0_person_name	String	Julian P. Sachs
attribute	NC_GLOBAL	people_0_person_nid	String	51578
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	University of California-Merced
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	UC Merced
attribute	NC_GLOBAL	people_1_person_name	String	Michael N Dawson
attribute	NC_GLOBAL	people_1_person_nid	String	51577
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	PaPaPro
attribute	NC_GLOBAL	projects_0_acronym	String	PaPaPro
attribute	NC_GLOBAL	projects_0_description	String	This project will survey the taxonomic, genetic, and functional diversity of the organisms found in marine lakes, and investigate the processes that cause gains and losses in this biodiversity. Marine lakes formed as melting ice sheets raised sea level after the last glacial maximum and flooded hundreds of inland valleys around the world. Inoculated with marine life from the surrounding sea and then isolated to varying degrees for the next 6,000 to 15,000 years, these marine lakes provide multiple, independent examples of how environments and interactions between species can drive extinction and speciation. Researchers will survey the microbes, algae, invertebrates, and fishes present in 40 marine lakes in Palau and Papua, and study how diversity has changed over time by retrieving the remains of organisms preserved in sediments on the lake bottoms. The project will test whether the number of species, the diversity of functional roles played by organisms, and the genetic diversity within species increase and decrease in parallel; whether certain species can greatly curtail diversity by changing the environment; whether the size of a lake determines its biodiversity; and whether the processes that control diversity in marine organisms are similar to those that operate on land. Because biodiversity underlies the ecosystem services on which society depends, society has a great interest in understanding the processes that generate and retain biodiversity in nature. This project will also help conserve areas of economic importance. Marine lakes in the study region are important for tourism, and researchers will work closely with governmental and non-governmental conservation and education groups and with diving and tourism businesses to raise awareness of the value and threats to marine lakes in Indonesia and Palau.
attribute	NC_GLOBAL	projects_0_end_date	String	2017-12
attribute	NC_GLOBAL	projects_0_geolocation	String	Western Pacific; Palau; Indonesia (West Papua)
attribute	NC_GLOBAL	projects_0_name	String	Do Parallel Patterns Arise from Parallel Processes?
attribute	NC_GLOBAL	projects_0_project_nid	String	2238
attribute	NC_GLOBAL	projects_0_project_website	String	http://marinelakes.ucmerced.edu/
attribute	NC_GLOBAL	projects_0_start_date	String	2013-01
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	Record of abundance and \u03b42H of dinosterol in down core lake sediments from T Lake, Palau collected in September 2013 using a 5cm\u2010diameter Colinvaux\u2010Vohnout Livingstone\u2010type rod\u2010operated piston corer.
attribute	NC_GLOBAL	title	String	Record of abundance and \u03b42H of dinosterol in down core lake sediments from T Lake, Palau collected in September 2013
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	depth_cm		short
attribute	depth_cm	_FillValue	short	32767
attribute	depth_cm	actual_range	short	85, 1240
attribute	depth_cm	bcodmo_name	String	depth_core
attribute	depth_cm	colorBarMaximum	double	8000.0
attribute	depth_cm	colorBarMinimum	double	-8000.0
attribute	depth_cm	colorBarPalette	String	TopographyDepth
attribute	depth_cm	description	String	composite depth, top of 1cm sampling interval
attribute	depth_cm	long_name	String	Depth
attribute	depth_cm	standard_name	String	depth
attribute	depth_cm	units	String	centimeters (cm)
variable	age_ybp		short
attribute	age_ybp	_FillValue	short	32767
attribute	age_ybp	actual_range	short	177, 10432
attribute	age_ybp	bcodmo_name	String	age
attribute	age_ybp	description	String	linear interpolation of PTLN_PC1_chron via CLAM 2.2
attribute	age_ybp	long_name	String	Age Ybp
attribute	age_ybp	units	String	years before present (yr bp)
variable	conc_dino		float
attribute	conc_dino	_FillValue	float	NaN
attribute	conc_dino	actual_range	float	0.4, 44.8
attribute	conc_dino	bcodmo_name	String	density
attribute	conc_dino	description	String	dry bulk sediment density
attribute	conc_dino	long_name	String	Conc Dino
attribute	conc_dino	units	String	grams per cubic centimeter (g cm-3)
variable	dbd		float
attribute	dbd	_FillValue	float	NaN
attribute	dbd	actual_range	float	0.442, 1.906
attribute	dbd	bcodmo_name	String	Sed_dinosterol
attribute	dbd	description	String	dinosterol per gram dry sediment
attribute	dbd	long_name	String	DBD
attribute	dbd	units	String	micrograms (ug)
variable	flux_dino		float
attribute	flux_dino	_FillValue	float	NaN
attribute	flux_dino	actual_range	float	0.1, 10.5
attribute	flux_dino	bcodmo_name	String	Sed_Lipids
attribute	flux_dino	description	String	dinosterol per square centimeter per year
attribute	flux_dino	long_name	String	Flux Dino
attribute	flux_dino	units	String	micrograms per square centimeter per year (ug cm-2 yr-1)
variable	dino_2H		short
attribute	dino_2H	_FillValue	short	32767
attribute	dino_2H	actual_range	short	-325, 999
attribute	dino_2H	bcodmo_name	String	d2H
attribute	dino_2H	description	String	delta 2H (d2h) of dinosterol vs. SMOW
attribute	dino_2H	long_name	String	Dino 2 H
attribute	dino_2H	units	String	per mil (‰)
variable	dino_2H_1sig		float
attribute	dino_2H_1sig	_FillValue	float	NaN
attribute	dino_2H_1sig	actual_range	float	0.6, 999.0
attribute	dino_2H_1sig	bcodmo_name	String	d2H
attribute	dino_2H_1sig	description	String	1 standard deviation of replicate analyses of 2H_dino
attribute	dino_2H_1sig	long_name	String	Dino 2 H 1sig
attribute	dino_2H_1sig	units	String	per mil (‰)

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.