ERDDAP > info > dO18StableIsotopesPalmerBasin

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
	set	data	graph		files	Sources of oceanic freshwater content in the Palmer Basin along the western Antarctic Peninsula (PAL-LTER Study Region) determined by the stable isotope composition (d18O) of seawater.		F   I   M	background			National Science ...	dO18StableIsotopesPalmerBasin

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	_NCProperties	String	version=1|netcdflibversion=4.6.1|hdf5libversion=1.10.6
attribute	NC_GLOBAL	acknowledgement	String	Funding and support provided by the National Science Foundation
attribute	NC_GLOBAL	cdm_data_type	String	TimeSeries
attribute	NC_GLOBAL	cdm_timeseries_variables	String	station,latitude,longitude
attribute	NC_GLOBAL	comment	String	The Palmer, Antarctica, Long-Term Ecological Research project is a member site of the Long-Term Ecological Research program, a network of sites investigating diverse biomes. A team of researchers seeks to understand the structure and function of the Western Antarctic Peninsula's marine and terrestrial ecosystems in the context of seasonal-to-interannual atmospheric and sea ice dynamics, as well as long-term climate change. The PAL measurement system (or grid) is designed to study marine and terrestrial food webs consisting principally of diatom primary producers, the dominant herbivore Antarctic krill, and the apex predator Adelie penguin. An attenuated microbial food web is also a focus. PAL studies these ecosystems annually over a regional scale grid of oceanographic stations and seasonally at Palmer Station. Palmer Station is located on Anvers Island west of the Antarctic Peninula. The peninsula runs perpendicular to a strong climatic gradient between the cold, dry continental regime to the south, characteristic of the Antarctic interior, and the warm, moist, maritime regime to the north. North-south shifts in the gradient give rise to large environmental variability to climate change. Sea ice extent and variability affects ecosystem changes at all trophic levels. In addition to the long-term field and research activities, information management, graduate student training, education and outreach are an integral part of the program.
attribute	NC_GLOBAL	contributor_name	String	Mike Meredith
attribute	NC_GLOBAL	contributor_role	String	principalInvestigator
attribute	NC_GLOBAL	contributor_role_vocabulary	String	https://vocab.nerc.ac.uk/collection/G04/current/
attribute	NC_GLOBAL	Conventions	String	CF-1.8, ACDD-1.3, COARDS
attribute	NC_GLOBAL	creator_country	String	USA
attribute	NC_GLOBAL	creator_email	String	kerfoot at marine.rutgers.edu
attribute	NC_GLOBAL	creator_institution	String	Rutgers University
attribute	NC_GLOBAL	creator_name	String	John Kerfoot
attribute	NC_GLOBAL	creator_sector	String	academic
attribute	NC_GLOBAL	creator_type	String	person
attribute	NC_GLOBAL	creator_url	String	https://rucool.marine.rutgers.edu
attribute	NC_GLOBAL	datazoo_datatable_label	String	Stable isotope composition (d18O) of seawater (Palmer Basin)
attribute	NC_GLOBAL	date_created	String	2021-03-12T02:38:12Z
attribute	NC_GLOBAL	date_issued	String	2021-03-12T02:38:12Z
attribute	NC_GLOBAL	defaultDataQuery	String	event%2Cstation%2Cdepth%2Ctemperature%2Csalinity%2Cmld%2Co18%2Co18_duplicate%2Ctime%2Clatitude%2Clongitude&orderBy(%22time%22)
attribute	NC_GLOBAL	defaultGraphQuery	String	longitude%2Clatitude%2C&.draw=markers&.marker=7%7C5&.color=0x000000&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff
attribute	NC_GLOBAL	Easternmost_Easting	double	-64.0405
attribute	NC_GLOBAL	featureType	String	TimeSeries
attribute	NC_GLOBAL	geospatial_bounds_crs	String	EPSG:4326
attribute	NC_GLOBAL	geospatial_bounds_vertical_crs	String	EPSG:5831
attribute	NC_GLOBAL	geospatial_lat_max	double	-64.7738
attribute	NC_GLOBAL	geospatial_lat_min	double	-64.815
attribute	NC_GLOBAL	geospatial_lat_resolution	String	0.00001 degree
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-64.0405
attribute	NC_GLOBAL	geospatial_lon_min	double	-64.0725
attribute	NC_GLOBAL	geospatial_lon_resolution	String	0.00001 degree
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	10.0
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	history	String	/Users/kerfoot/data/lter/data/xlsx/meredith/Stable Isotope composition (dO18) of seawater (Palmer).xls
attribute	NC_GLOBAL	infoUrl	String	https://pal.lternet.edu/
attribute	NC_GLOBAL	institution	String	National Science Foundation
attribute	NC_GLOBAL	instrument_vocabulary	String	NASA/GCMD Instrument Keywords Version 8.5
attribute	NC_GLOBAL	keywords	String	16o, 18o, antarctic, basinalong, climate, composition, content, d18o, data, date, density, depth, determined, deviation, earth, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Salinity, event, excluding, freshwater, identifier, index, isotope, isotope_ratio_of_18o_to_16o_in_sea_water_excluding_solutes_and_solids, isotopes, jcli, journal, latitude, layer, longitude, lter, mixed, mld, number, o18, o18_duplicate, ocean, oceanic, oceanography, oceans, oxygen, pal, pal-lter, palmer, peninsula, physical, physical oceanography, practical, ratio, region, rutgers, salinity, sample, sampling, science, sea, sea_water_practical_salinity, sea_water_temperature, seawater, solids, solutes, sources, stable, standard, station, statistics, study, temperature, time, university, water, western
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	All data contained herein is licensed under the LTER Network Data Access Policy (https://lternet.edu/data-access-policy/). In accordance with scientific publishing conventions and professional etiquette, the consumer of these data (the "Data User") is expected to appropriately cite these data in any publication that results from their use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur and should realize that misinterpretation of data may occur if used out of context of the original study. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the data authors. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data.
attribute	NC_GLOBAL	license_link	String	https://lternet.edu/data-access-policy/
attribute	NC_GLOBAL	methods	String	Stable oxygen isotope composition of seawater: PAL-LTER samples were drawn into 50-ml glass vials, which were sealed with stoppers and aluminum crimps to prevent evaporation. The d18O samples were then transported to the United Kingdom via dark cool stow (4 degC), where they were analyzed at the Natural Environment Research Council Isotope Geosciences Laboratory (NIGL) at the British Geological Survey. The method of analysis is the equilibrium method for oxygen (Epstein and Mayeda 1953), with samples run on a VG Isoprep 18 and SIRA 10 mass spectrometer. Random duplicates were analyzed to establish precision, with an average better than +/- 0.02%.
attribute	NC_GLOBAL	naming_authority	String	edu.rutgers.rucool
attribute	NC_GLOBAL	Northernmost_Northing	double	-64.7738
attribute	NC_GLOBAL	platform_vocabulary	String	NASA/GCMD Platforms Keywords Version 8.5
attribute	NC_GLOBAL	product_version	String	1.0
attribute	NC_GLOBAL	program	String	LTER
attribute	NC_GLOBAL	project	String	Palmer LTER
attribute	NC_GLOBAL	publisher_country	String	USA
attribute	NC_GLOBAL	publisher_email	String	kerfoot at marine.rutgers.edu
attribute	NC_GLOBAL	publisher_institution	String	Rutgers University
attribute	NC_GLOBAL	publisher_name	String	John Kerfoot
attribute	NC_GLOBAL	publisher_type	String	person
attribute	NC_GLOBAL	publisher_url	String	https://rucool.marine.rutgers.edu
attribute	NC_GLOBAL	references	String	https://pal.lternet.edu/
attribute	NC_GLOBAL	sea_name	String	Southern Ocean
attribute	NC_GLOBAL	source	String	/Users/kerfoot/data/lter/data/xlsx/meredith/Stable Isotope composition (dO18) of seawater (Palmer).xls
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	-64.815
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v77
attribute	NC_GLOBAL	subsetVariables	String	station,latitude,longitude
attribute	NC_GLOBAL	summary	String	Dataset contains measurements of the ratio of stable isotopes of oxygen in seawater taken in the Palmer Basin at stations B, E and the Palmer station seawater intake. The oceanic distribution of d18O is determined largely by the same processes that control salinity. Surface d18O reflects the magnitude and spatial distribution of freshwater inputs, and it is a conservative tracer in the ocean interior. The great benefit of d18O is obtained from the circumstances under which it exhibits behavior different to that of salinity. One such circumstance derives from the salinity and d18O values in precipitation, with salinity being constant with latitude (typically zero), while in general d18O in precipitation becomes progressively isotopically lighter toward the poles. This results in glacial ice (which derives from high-latitude precipitation) being very isotopically light, enabling d18O to be a useful tracer of glacial discharge to the ocean (e.g., Schlosser et al. 1990; Weiss et al. 1979). Another difference occurs in regions influenced by sea ice, which greatly affects salinity during its formation/melt cycle but has only minimal impact on d18O. This decoupling of the two tracers allows them to be used in tandem to quantitatively separate freshwater inputs from sea ice melt and those from meteoric sources (precipitation plus glacial discharge). For this, a simple three-endmember mass balance can be used. For details please see Meredith, M. P., H. J. Venables, A. Clarke, H. W. Ducklow, M. Erickson, M. J. Leng, J. T. M. Lenaerts, and M. R. van den Broeke. 2013. The freshwater system west of the Antarctic Peninsula: Spatial and temporal changes. Journal of Climate 26:1669-1684.
attribute	NC_GLOBAL	time_coverage_end	String	2018-03-26T00:00:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2011-11-24T00:00:00Z
attribute	NC_GLOBAL	title	String	Sources of oceanic freshwater content in the Palmer Basin along the western Antarctic Peninsula (PAL-LTER Study Region) determined by the stable isotope composition (d18O) of seawater.
attribute	NC_GLOBAL	Westernmost_Easting	double	-64.0725
variable	station		String
attribute	station	cf_role	String	timeseries_id
attribute	station	comment	String	Palmer LTER sampling station
attribute	station	ioos_category	String	Identifier
attribute	station	long_name	String	Sampling Station
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.3220928E9, 1.5220224E9
attribute	time	axis	String	T
attribute	time	calendar	String	proleptic_gregorian
attribute	time	comment	String	Date and time of the sample
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Sample Date
attribute	time	lter_mscale	String	dateTime
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	9.969209968386869E36
attribute	latitude	actual_range	double	-64.815, -64.7738
attribute	latitude	axis	String	Y
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	comment	String	Latitude (degrees South) from CTD bottle trip record
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	lter_mscale	String	ratio
attribute	latitude	lter_num_type	String	real
attribute	latitude	lter_units	String	º
attribute	latitude	lter_units_string	String	degree
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
attribute	latitude	units_conventions	String	EML-2.0.1,EML-2.1.0,EML-LTER
variable	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	9.969209968386869E36
attribute	longitude	actual_range	double	-64.0725, -64.0405
attribute	longitude	axis	String	X
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	comment	String	Longitude (degrees West) from CTD bottle trip record
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	lter_mscale	String	ratio
attribute	longitude	lter_num_type	String	real
attribute	longitude	lter_units	String	º
attribute	longitude	lter_units_string	String	degree
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
attribute	longitude	units_conventions	String	EML-2.0.1,EML-2.1.0,EML-LTER
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	9.969209968386869E36
attribute	depth	actual_range	double	0.0, 10.0
attribute	depth	axis	String	Z
attribute	depth	colorBarMaximum	double	8000.0
attribute	depth	colorBarMinimum	double	-8000.0
attribute	depth	colorBarPalette	String	TopographyDepth
attribute	depth	comment	String	Depth of sample collection
attribute	depth	ioos_category	String	Location
attribute	depth	long_name	String	Depth
attribute	depth	lter_units	String	m
attribute	depth	lter_units_string	String	meter
attribute	depth	positive	String	down
attribute	depth	standard_name	String	depth
attribute	depth	units	String	m
attribute	depth	units_conventions	String	AND-LTER,BNZ-LTER,CDR-LTER,EML-2.0.1,EML-2.1.0,EML-LTER,LUQ-LTER,SGS-LTER
variable	temperature		double
attribute	temperature	_FillValue	double	9.969209968386869E36
attribute	temperature	actual_range	double	-1.7547, 2.8855
attribute	temperature	colorBarMaximum	double	32.0
attribute	temperature	colorBarMinimum	double	0.0
attribute	temperature	comment	String	Water temperature from CTD
attribute	temperature	ioos_category	String	Temperature
attribute	temperature	long_name	String	Temperature
attribute	temperature	lter_units	String	C
attribute	temperature	lter_units_string	String	celsius
attribute	temperature	standard_name	String	sea_water_temperature
attribute	temperature	units	String	degree_C
attribute	temperature	units_conventions	String	AND-LTER,BNZ-LTER,EML-2.0.1,EML-2.1.0,EML-LTER,LUQ-LTER,SGS-LTER
variable	salinity		double
attribute	salinity	_FillValue	double	9.969209968386869E36
attribute	salinity	actual_range	double	31.936, 34.207
attribute	salinity	colorBarMaximum	double	37.0
attribute	salinity	colorBarMinimum	double	32.0
attribute	salinity	comment	String	Calculated salinity from CTD
attribute	salinity	ioos_category	String	Salinity
attribute	salinity	long_name	String	Practical Salinity
attribute	salinity	lter_units	String	PSU
attribute	salinity	lter_units_string	String	practicalSalinityUnit
attribute	salinity	standard_name	String	sea_water_practical_salinity
attribute	salinity	units	String	1
attribute	salinity	units_conventions	String	MCM-LTER,PAL-LTER
variable	mld		double
attribute	mld	_FillValue	double	9.969209968386869E36
attribute	mld	actual_range	double	1.0, 90.0
attribute	mld	comment	String	Depth of the mixed layer calculated using maximum buoyancy as per Carvalho et al 2016.
attribute	mld	ioos_category	String	Physical Oceanography
attribute	mld	long_name	String	Mixed Layer Depth
attribute	mld	units	String	m
variable	o18		double
attribute	o18	_FillValue	double	9.969209968386869E36
attribute	o18	actual_range	double	-1.074380936432517, -0.1283467377767913
attribute	o18	comment	String	Ratio of stable isotopes of oxygen in seawater
attribute	o18	ioos_category	String	Unknown
attribute	o18	long_name	String	Oxygen Isotopes Ratio
attribute	o18	standard_name	String	isotope_ratio_of_18o_to_16o_in_sea_water_excluding_solutes_and_solids
attribute	o18	units	String	ppt
variable	o18_duplicate		double
attribute	o18_duplicate	_FillValue	double	9.969209968386869E36
attribute	o18_duplicate	actual_range	double	-1.0589649684624307, -0.234282852626587
attribute	o18_duplicate	comment	String	Ratio of stable isotopes of oxygen in seawater. Duplicate sample
attribute	o18_duplicate	ioos_category	String	Unknown
attribute	o18_duplicate	long_name	String	Oxygen Isotopes Ratio
attribute	o18_duplicate	standard_name	String	isotope_ratio_of_18o_to_16o_in_sea_water_excluding_solutes_and_solids
attribute	o18_duplicate	units	String	ppt
variable	event		short
attribute	event	_FillValue	short	32767
attribute	event	actual_range	short	1, 380
attribute	event	colorBarMaximum	double	100.0
attribute	event	colorBarMinimum	double	0.0
attribute	event	comment	String	Sampling event number
attribute	event	ioos_category	String	Statistics
attribute	event	long_name	String	Event Number

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.