ERDDAP > info > bcodmo_dataset_813140

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
	set	data	graph		files	public	[Dissolved oxygen] - Dissolved oxygen from sediment cores collected on the R/V Nathaniel B. Palmer cruise NBP1601 to the West Antarctic continental shelf in January of 2016 (Organic Carbon Oxidation and Iron Remobilization by West Antarctic Shelf Sediments)		F   I   M	background			BCO-DMO	bcodmo_dataset_813140

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	Sediment and pore water collection: Short sediment cores were collected using a Bowers & Connelly megacorer, a multiple coring device that can collect ~20-40 cm long sediment cores with undisturbed sediment surfaces. Megacorer cores were either sectioned for solid phase analysis, profiled with polarographic microelectrodes to determine dissolved O2 concentrations, or sectioned in a cold van under N2 for pore water sample extraction. Dissolved oxygen analyses: This was carried out by microprofiling sediment cores in a cold room using voltametric gold-amalgam (Au/Hg) microelectrodes, as described in detail elsewhere (Brendel and Luther, 1995; Luther et al., 1998; Luther et al., 2008). An Analytical Instrument Systems model DLK-100 voltammetric analyzer was used for all measurements, with profiling carried out using an AIS computer-controlled automated micromanipulator. Oxygen was determined by linear-sweep voltammetry (voltage range: -0.1 to -1.8 V, scan rate: 200 mV/s), and quantified based on the peak height at roughly -0.3 V. Electrodes were calibrated using a two-point calibration curve with O2 saturated bottom water and the electrode response in the deeper O2-free zone of the sediments (Cai and Sayles, 1996). Five scans were carried out at each depth, with the last three scans typically averaged for concentration determinations.
attribute	NC_GLOBAL	awards_0_award_nid	String	806863
attribute	NC_GLOBAL	awards_0_award_number	String	OPP-1551195
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1551195
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	Michael E. Jackson
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	806862
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Dissolved oxygen PI: David J Burdige Data Version 1: 2020-06-08
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	dataset_current_state	String	Final and no updates
attribute	NC_GLOBAL	date_created	String	2020-05-27T22:05:31Z
attribute	NC_GLOBAL	date_modified	String	2020-06-17T15:08:41Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.813140.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-62.7317
attribute	NC_GLOBAL	geospatial_lat_max	double	-64.1583
attribute	NC_GLOBAL	geospatial_lat_min	double	-67.2417
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-62.7317
attribute	NC_GLOBAL	geospatial_lon_min	double	-71.2217
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/813140
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	Multi Corer
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Short sediment cores were collected using a Bowers & Connelly megacorer, a multiple coring device that can collect ~20-40 cm long sediment cores with undisturbed sediment surfaces.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	814582
attribute	NC_GLOBAL	instruments_0_description	String	The Multi Corer is a benthic coring device used to collect multiple, simultaneous, undisturbed sediment/water samples from the seafloor. Multiple coring tubes with varying sampling capacity depending on tube dimensions are mounted in a frame designed to sample the deep ocean seafloor. For more information, see Barnett et al. (1984) in Oceanologica Acta, 7, pp. 399-408.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/51/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Multi Corer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	532
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Bowers & Connelly megacorer
attribute	NC_GLOBAL	instruments_1_acronym	String	Voltammetry Analyzers
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	814583
attribute	NC_GLOBAL	instruments_1_description	String	Instruments that obtain information about an analyte by applying a potential and measuring the current produced in the analyte.
attribute	NC_GLOBAL	instruments_1_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB35/
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Voltammetry Analyzers
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	698
attribute	NC_GLOBAL	instruments_1_supplied_name	String	Analytical Instrument Systems model DLK-100
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, chemical, coll, comment, core, data, dataset, date, day, Day_Coll, Day_Prf, depth, dmo, erddap, iso, ISO_DateTime_UTC_Coll, latitude, longitude, management, month, O2, oceanography, office, oxygen, preliminary, prf, prof, profile, sample, Sample_Comment, St_ID, T_Coll, T_Prf, time, year
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/813140/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/813140
attribute	NC_GLOBAL	Northernmost_Northing	double	-64.1583
attribute	NC_GLOBAL	param_mapping	String	{'813140': {'Lat': 'master - latitude', 'Lon': 'master - longitude', 'ISO_DateTime_UTC_Coll': 'master - time'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/813140/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Old Dominion University
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	ODU
attribute	NC_GLOBAL	people_0_person_name	String	David J Burdige
attribute	NC_GLOBAL	people_0_person_nid	String	648653
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	New England Oceanographic Laboratory
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	NEOL
attribute	NC_GLOBAL	people_1_person_name	String	John P Christensen
attribute	NC_GLOBAL	people_1_person_nid	String	51603
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	Amber D. York
attribute	NC_GLOBAL	people_2_person_nid	String	643627
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	Antarctic Shelf Sediments
attribute	NC_GLOBAL	projects_0_acronym	String	Antarctic Shelf Sediments
attribute	NC_GLOBAL	projects_0_description	String	NSF Award Abstract: General Statement: The continental shelf region west of the Antarctic Peninsula has recently undergone dramatic changes and ecosystem shifts, and the community of organisms that live in, or feed off, the sea floor sediments is being impacted by species invasions from the north. Previous studies of these sediments indicate that this community may consume much more of the regional productivity than previously estimated, suggesting that sediments are a rich and important component of this ecosystem and one that may be ripe for dramatic change. Furthermore, under richer sediment conditions, iron is mobilized and released back to the water column. Since productivity in this ecosystem is thought to be limited by the availability of iron, increased rates of iron release from these sediments could stimulate productivity and promote greater overall ecosystem change. In this research, a variety of sites across the shelf region will be sampled to accurately evaluate the role of sediments in consuming ecosystem productivity and to estimate the current level of iron release from the sediments. This project will provide a baseline set of sediment results that will present a more complete picture of the west Antarctic shelf ecosystem, will allow for comparison with water column measurements and for evaluation of the fundamental workings of this important ecosystem. This is particularly important since high latitude systems may be vulnerable to the effects of climate fluctuations. Both graduate and undergraduate students will be trained. Presentations will be made at scientific meetings, at other universities, and at outreach events. A project web site will present key results to the public and explain how this new information improves understanding of Antarctic ecosystems. Technical Description of Project: In order to determine the role of sediments within the west Antarctic shelf ecosystem, this project will determine the rates of sediment organic matter oxidation at a variety of sites across the Palmer Long Term Ecosystem Research (LTER) study region. To estimate the rates of release of iron and manganese from the sediments, these same sites will be sampled for detailed vertical distributions of the concentrations of these metals both in the porewaters and in important mineral phases. Since sediment sampling will be done at LTER sites, the sediment data can be correlated with the rich productivity data set from the LTER. In detail, the project: a) will determine the rates of oxygen consumption, organic carbon oxidation, nutrient release, and iron mobilization by shelf sediments west of the Antarctic Peninsula; b) will investigate the vertical distribution of diagenetic reactions within the sediments; and c) will assess the regional importance of these sediment rates. Sediment cores will be used to determine sediment-water fluxes of dissolved oxygen, total carbon dioxide, nutrients, and the vertical distributions of these dissolved compounds, as well as iron and manganese in the pore waters. Bulk sediment properties of porosity, organic carbon and nitrogen content, carbonate content, biogenic silica content, and multiple species of solid-phase iron, manganese, and sulfur species will also be determined. These measurements will allow determination of total organic carbon oxidation and denitrification rates, and the proportion of aerobic versus anaerobic respiration at each site. Sediment diagenetic modeling will link the processes of organic matter oxidation to metal mobilization. Pore water and solid phase iron and manganese distributions will be used to model iron diagenesis in these sediments and to estimate the iron flux from the sediments to the overlying waters. Finally, the overall regional average and distribution of the sediment processes will be compared with the distributions of seasonally averaged chlorophyll biomass and productivity.
attribute	NC_GLOBAL	projects_0_end_date	String	2020-02
attribute	NC_GLOBAL	projects_0_geolocation	String	West Antarctic Continental Shelf
attribute	NC_GLOBAL	projects_0_name	String	Organic Carbon Oxidation and Iron Remobilization by West Antarctic Shelf Sediments
attribute	NC_GLOBAL	projects_0_project_nid	String	806864
attribute	NC_GLOBAL	projects_0_start_date	String	2015-09
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	-67.2417
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	Month,Year
attribute	NC_GLOBAL	summary	String	Dissolved oxygen from sediment cores collected on the R/V Nathaniel B. Palmer cruise NBP1601 to the West Antarctic continental shelf in January of 2016.
attribute	NC_GLOBAL	time_coverage_end	String	2016-01-29T11:42:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2016-01-15T11:43:00Z
attribute	NC_GLOBAL	title	String	[Dissolved oxygen] - Dissolved oxygen from sediment cores collected on the R/V Nathaniel B. Palmer cruise NBP1601 to the West Antarctic continental shelf in January of 2016 (Organic Carbon Oxidation and Iron Remobilization by West Antarctic Shelf Sediments)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-71.2217
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.5
variable	St_ID		String
attribute	St_ID	bcodmo_name	String	station
attribute	St_ID	description	String	station ID number
attribute	St_ID	long_name	String	St ID
attribute	St_ID	units	String	unitless
variable	Core		byte
attribute	Core	_FillValue	byte	127
attribute	Core	actual_range	byte	1, 12
attribute	Core	bcodmo_name	String	sample_type
attribute	Core	description	String	core ID number
attribute	Core	long_name	String	Core
attribute	Core	units	String	unitless
variable	Profile		String
attribute	Profile	bcodmo_name	String	sample_descrip
attribute	Profile	description	String	profile number (a = first profile of a core; b = second profile of the same core)
attribute	Profile	long_name	String	Profile
attribute	Profile	units	String	unitless
variable	Sample_Comment		String
attribute	Sample_Comment	bcodmo_name	String	comment
attribute	Sample_Comment	description	String	Sample comment. "BW CTD" = dissolved oxygen measurements made with the CTD sensor ~5-10 meters off the seafloor
attribute	Sample_Comment	long_name	String	Sample Comment
attribute	Sample_Comment	units	String	unitless
variable	Depth		float
attribute	Depth	_FillValue	float	NaN
attribute	Depth	actual_range	float	-0.4, 13.0
attribute	Depth	bcodmo_name	String	depth_bsf
attribute	Depth	colorBarMaximum	double	8000.0
attribute	Depth	colorBarMinimum	double	-8000.0
attribute	Depth	colorBarPalette	String	TopographyDepth
attribute	Depth	description	String	depth into the core relative to the sediment-water interface(0 = sediment surface; negative value are in the water overlying the core.
attribute	Depth	long_name	String	Depth
attribute	Depth	standard_name	String	depth
attribute	Depth	units	String	centimeters (cm)
variable	O2		String
attribute	O2	bcodmo_name	String	dissolved Oxygen
attribute	O2	description	String	dissolved oxygen (bd = below analytical detection limit)
attribute	O2	long_name	String	O2
attribute	O2	units	String	micromolar (uM)
variable	Month		byte
attribute	Month	_FillValue	byte	127
attribute	Month	actual_range	byte	1, 1
attribute	Month	bcodmo_name	String	month
attribute	Month	description	String	month (core collected). Local time (Punta Arenas, UTC-3).
attribute	Month	long_name	String	Month
attribute	Month	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/MNTHXXXX/
attribute	Month	units	String	unitless
variable	Day_Coll		byte
attribute	Day_Coll	_FillValue	byte	127
attribute	Day_Coll	actual_range	byte	15, 29
attribute	Day_Coll	bcodmo_name	String	day
attribute	Day_Coll	description	String	day (core collected). Local time (Punta Arenas, UTC-3).
attribute	Day_Coll	long_name	String	Day Coll
attribute	Day_Coll	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DAYXXXXX/
attribute	Day_Coll	units	String	unitless
variable	Year		short
attribute	Year	_FillValue	short	32767
attribute	Year	actual_range	short	2016, 2016
attribute	Year	bcodmo_name	String	year
attribute	Year	description	String	year (core collected) in format yyyy. Local time (Punta Arenas, UTC-3).
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	T_Coll		String
attribute	T_Coll	bcodmo_name	String	time_local
attribute	T_Coll	description	String	time core collected in format HH:MM:SS
attribute	T_Coll	long_name	String	T Coll
attribute	T_Coll	units	String	unitless
variable	Day_Prf		byte
attribute	Day_Prf	_FillValue	byte	127
attribute	Day_Prf	actual_range	byte	15, 29
attribute	Day_Prf	bcodmo_name	String	day
attribute	Day_Prf	description	String	day (profiling). Local time (Punta Arenas, UTC-3).
attribute	Day_Prf	long_name	String	Day Prf
attribute	Day_Prf	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DAYXXXXX/
attribute	Day_Prf	units	String	unitless
variable	T_Prf		String
attribute	T_Prf	bcodmo_name	String	time_local
attribute	T_Prf	description	String	time start of profiling in format HH:MM:SS. Local time (Punta Arenas, UTC-3).
attribute	T_Prf	long_name	String	T PRF
attribute	T_Prf	units	String	unitless
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	-67.2417, -64.1583
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	station latitude, south is negative
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	-71.2217, -62.7317
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	station longitude, west is 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	ISO_DateTime_UTC_Prof		String
attribute	ISO_DateTime_UTC_Prof	bcodmo_name	String	ISO_DateTime_UTC
attribute	ISO_DateTime_UTC_Prof	description	String	timestamp (UTC) at the start of profiling in ISO 8601 format yyyy-mm-ddTHH:MMZ
attribute	ISO_DateTime_UTC_Prof	long_name	String	ISO Date Time UTC Prof
attribute	ISO_DateTime_UTC_Prof	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/
attribute	ISO_DateTime_UTC_Prof	source_name	String	ISO_DateTime_UTC_Prof
attribute	ISO_DateTime_UTC_Prof	time_precision	String	1970-01-01T00:00:00Z
attribute	ISO_DateTime_UTC_Prof	units	String	unitless
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.45285818E9, 1.45406772E9
attribute	time	axis	String	T
attribute	time	bcodmo_name	String	ISO_DateTime_UTC
attribute	time	description	String	timestamp (UTC) when the time core was collected in ISO 8601 format yyyy-mm-ddTHH:MMZ
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	ISO Date Time UTC Coll
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	time_precision	String	1970-01-01T00:00:00Z
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.