ERDDAP > info > noaa-oap_pH_glider_groundtruthing

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
		data	graph		files	NOAA OAP Seasonal pH Glider Groundtruthing		F   I   M	background			Rutgers University	noaa-oap_pH_glider_groundtruthing

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	acknowledgement	String	Funding provided by the NOAA Ocean Acidification Program and U.S. Integrated Ocean Observing System
attribute	NC_GLOBAL	cdm_data_type	String	Point
attribute	NC_GLOBAL	comment	String	Comparisons between data recorded by gliders and discrete water samples taken at glider deployments and recoveries. Water samples were collected via Niskin bottles mounted on a CTD-rosette, or via individual Niskin bottle casts. pH (on the Total pH scale) of water samples was measured spectrophotometrically at 25°C with purified meta-cresol purple (mCP, Liu et al. 2011) using 10 cm pathlength cylindrical glass cells and an Agilent Technologies Cary 8454 UV-Vis spectrometer. pH was calculated according to the equations presented in Douglas and Byrne (2017). Total alkalinity (TA) titrations for water samples were performed by a custom-built titration apparatus, following the approach of Standard Operating Procedure 3b (Dickson et al. 2007). Discrete pH samples were corrected for temperature, pressure, and salinity using pyCO2SYS before comparing to glider data.
attribute	NC_GLOBAL	contributor_name	String	Grace Saba, Chris Hunt, Dave Aragon, Nicole Waite, Brian Buckingham, Chip Haldeman, John Kerfoot, Lori Garzio, Laura Nazzaro, Elizabeth Wright-Fairbanks
attribute	NC_GLOBAL	contributor_role	String	Principal Investigator, Senior Personnel, Glider Pilot, Glider Pilot and Field Technician, Glider Pilot and Field Technician, Vessel Captain, Data Management, Data Management, Data Management, Graduate Student
attribute	NC_GLOBAL	Conventions	String	ACDD 1.3, COARDS, CF-1.10
attribute	NC_GLOBAL	creator_email	String	lgarzio at marine.rutgers.edu
attribute	NC_GLOBAL	creator_institution	String	Rutgers University
attribute	NC_GLOBAL	creator_name	String	Lori Garzio
attribute	NC_GLOBAL	creator_type	String	person
attribute	NC_GLOBAL	creator_url	String	https://marine.rutgers.edu/main/
attribute	NC_GLOBAL	Easternmost_Easting	double	-73.748
attribute	NC_GLOBAL	featureType	String	Point
attribute	NC_GLOBAL	geospatial_bounds_crs	String	EPSG:6347
attribute	NC_GLOBAL	geospatial_lat_max	double	40.3586
attribute	NC_GLOBAL	geospatial_lat_min	double	39.3313
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-73.748
attribute	NC_GLOBAL	geospatial_lon_min	double	-74.342
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	21.0
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	id	String	noaa-oap_pH_glider_groundtruthing
attribute	NC_GLOBAL	infoUrl	String	https://marine.rutgers.edu/
attribute	NC_GLOBAL	institution	String	Rutgers University
attribute	NC_GLOBAL	keywords	String	alkalinity, carbon, carbon dioxide, cast, cast_number, centers, chemistry, co2, conductivity, cruise, cruise_type, ctd, data, density, depth, difference, dioxide, distance, earth, Earth Science > Oceans > Ocean Chemistry > pH, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Salinity, environmental, glider, glider_trajectory, groundtruthing, information, latitude, latitude_glider, longitude, longitude_glider, national, ncei, nesdis, noaa, notes, number, oap, obs, observations, ocean, oceans, pH_diff, pH_discrete, pH_glider, practical, reported, rutgers, salinity, salinity_discrete, salinity_glider, sample, sampling_time, scale, science, sea, sea_water_ph_reported_on_total_scale, sea_water_practical_salinity, sea_water_temperature, seasonal, seawater, sonde, statistics, TA_diff, TA_discrete, TA_glider, temperature, temperature_discrete, temperature_glider, time, total, trajectory, type, university, water
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	see Data Use Agreement
attribute	NC_GLOBAL	Northernmost_Northing	double	40.3586
attribute	NC_GLOBAL	processing_level	String	Discrete pH samples were corrected for temperature, pressure, and salinity using pyCO2SYS. The closest glider profile was determined using glider profile time and coordinates compared to the discrete water sampling time and coordinates. Glider data were subsampled by taking the median of the glider data recorded at +/- 1m of the discrete sampling depth.
attribute	NC_GLOBAL	program	String	Collaborative Research: Optimizing Ocean Acidification Observations for Model Parameterization in the Coupled Slope Water System of the U.S. Northeast Large Marine Ecosystem, Sustained Underwater Glider Observations for Improving Atlantic Tropical Cyclone Intensity Forecast - AOML/OAR
attribute	NC_GLOBAL	project	String	NOAA OAP (Ocean Acidification Program)/IOOS, Sustained Underwater Glider Observations for Improving Atlantic Tropical Cyclone Intensity Forecast
attribute	NC_GLOBAL	publisher_email	String	lgarzio at marine.rutgers.edu
attribute	NC_GLOBAL	publisher_institution	String	Rutgers University
attribute	NC_GLOBAL	publisher_name	String	Lori Garzio
attribute	NC_GLOBAL	publisher_type	String	person
attribute	NC_GLOBAL	references	String	Saba et al 2019 https://doi.org/10.3389/fmars.2019.00664; Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505; PyCO2SYS (Humphreys et al. (2020) doi:10.5281/zenodo.3744275; Lewis and Wallace (1998)); Liu et al 2011 https://doi.org/10.4319/lo.1998.43.4.0657; Douglas and Byrne 2017 https://doi.org/10.1016/j.marchem.2017.02.004; Dickson, A.G., Sabine, C.L. and Christian, J.R. (Eds.) 2007. Guide to best practices for ocean CO2 measurements. PICES Special Publication 3, 191 pp. ("Guide" in one PDF file)
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	39.3313
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v70
attribute	NC_GLOBAL	summary	String	This project conducted seasonal glider deployments to investigate carbonate chemistry and monitor ocean acidification in the Mid-Atlantic Bight. Gliders were deployed with an integrated deep rated version of the Ion Sensitive Field Effect Transistor (ISFET)-based pH sensor. The pH sensor unit was complemented with existing glider sensors including a Conductivity, Temperature, Depth (CTD), a WETLabs FLBBCD ECO puck configured for simultaneous chlorophyll fluorescence and optical backscatter measurements, and an Aanderaa Optode for measuring dissolved oxygen. This is the comparison between pH data recorded by gliders and discrete water samples taken at glider deployments and recoveries. Full-resolution glider datasets can be downloaded via the National Centers for Environmental Information (NCEI) Ocean Carbon and Acidification Data System (https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system).
attribute	NC_GLOBAL	time_coverage_end	String	2022-11-07T19:15:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2021-02-26T16:49:00Z
attribute	NC_GLOBAL	title	String	NOAA OAP Seasonal pH Glider Groundtruthing
attribute	NC_GLOBAL	Westernmost_Easting	double	-74.342
variable	obs		long
attribute	obs	_FillValue	long	9223372036854775807
attribute	obs	actual_range	long	0, 58
attribute	obs	ioos_category	String	Unknown
attribute	obs	long_name	String	Obs
variable	glider_trajectory		String
attribute	glider_trajectory	description	String	Glider deployment/trajectory ID
attribute	glider_trajectory	ioos_category	String	Unknown
attribute	glider_trajectory	long_name	String	Glider Trajectory
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.61435814E9, 1.6678485E9
attribute	time	axis	String	T
attribute	time	calendar	String	gregorian
attribute	time	description	String	Timestamp of glider sample
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Time (Glider)
attribute	time	source_name	String	glider_time
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	sampling_time		double
attribute	sampling_time	actual_range	double	1.6143552E9, 1.6678494E9
attribute	sampling_time	calendar	String	gregorian
attribute	sampling_time	description	String	Timestamp of the discrete water sample collection
attribute	sampling_time	ioos_category	String	Time
attribute	sampling_time	long_name	String	Time (Water Sample)
attribute	sampling_time	standard_name	String	time
attribute	sampling_time	time_origin	String	01-JAN-1970 00:00:00
attribute	sampling_time	units	String	seconds since 1970-01-01T00:00:00Z
variable	longitude_glider		float
attribute	longitude_glider	_FillValue	float	-9999.0
attribute	longitude_glider	actual_range	float	-74.3439, -73.7151
attribute	longitude_glider	colorBarMaximum	double	180.0
attribute	longitude_glider	colorBarMinimum	double	-180.0
attribute	longitude_glider	description	String	Longitude of the glider
attribute	longitude_glider	ioos_category	String	Location
attribute	longitude_glider	long_name	String	Longitude (Glider)
attribute	longitude_glider	standard_name	String	longitude
attribute	longitude_glider	units	String	degrees_east
variable	latitude_glider		float
attribute	latitude_glider	_FillValue	float	-9999.0
attribute	latitude_glider	actual_range	float	39.3032, 40.4272
attribute	latitude_glider	colorBarMaximum	double	90.0
attribute	latitude_glider	colorBarMinimum	double	-90.0
attribute	latitude_glider	description	String	Latitude of the glider
attribute	latitude_glider	ioos_category	String	Location
attribute	latitude_glider	long_name	String	Latitude (Glider)
attribute	latitude_glider	standard_name	String	latitude
attribute	latitude_glider	units	String	degrees_north
variable	longitude		float
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	float	-9999.0
attribute	longitude	actual_range	float	-74.342, -73.748
attribute	longitude	axis	String	X
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	description	String	Longitude of the discrete water sample collection
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude (Water Sample)
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	latitude		float
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	float	-9999.0
attribute	latitude	actual_range	float	39.3313, 40.3586
attribute	latitude	axis	String	Y
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	description	String	Latitude of the discrete water sample collection
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude (Water Sample)
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	cruise_type		String
attribute	cruise_type	description	String	Glider deployment or recovery
attribute	cruise_type	ioos_category	String	Unknown
attribute	cruise_type	long_name	String	Cruise Type
variable	cast_number		float
attribute	cast_number	_FillValue	float	-9999.0
attribute	cast_number	actual_range	float	1.0, 4.0
attribute	cast_number	colorBarMaximum	double	100.0
attribute	cast_number	colorBarMinimum	double	0.0
attribute	cast_number	description	String	Replicate cast number of the discrete water sampling apparatus (CTD rosette or Niskin bottle)
attribute	cast_number	ioos_category	String	Statistics
attribute	cast_number	long_name	String	Cast Number
variable	distance		float
attribute	distance	_FillValue	float	-9999.0
attribute	distance	actual_range	float	25.0, 956.0
attribute	distance	description	String	Distance calculated between the glider coordinates and water sampling coordinates
attribute	distance	ioos_category	String	Unknown
attribute	distance	long_name	String	Distance
attribute	distance	units	String	m
variable	depth		float
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	float	-9999.0
attribute	depth	actual_range	float	0.0, 21.0
attribute	depth	axis	String	Z
attribute	depth	colorBarMaximum	double	8000.0
attribute	depth	colorBarMinimum	double	-8000.0
attribute	depth	colorBarPalette	String	TopographyDepth
attribute	depth	description	String	Depth at which water samples and glider measurements were taken
attribute	depth	ioos_category	String	Location
attribute	depth	long_name	String	Depth
attribute	depth	positive	String	down
attribute	depth	standard_name	String	depth
attribute	depth	units	String	m
variable	pH_glider		float
attribute	pH_glider	_FillValue	float	-9999.0
attribute	pH_glider	actual_range	float	7.843, 8.127
attribute	pH_glider	colorBarMaximum	double	9.0
attribute	pH_glider	colorBarMinimum	double	7.0
attribute	pH_glider	description	String	Median pH measured by the glider at depth +/- 1m
attribute	pH_glider	ioos_category	String	Salinity
attribute	pH_glider	long_name	String	pH (Glider)
attribute	pH_glider	standard_name	String	sea_water_ph_reported_on_total_scale
attribute	pH_glider	units	String	1
variable	pH_discrete		float
attribute	pH_discrete	_FillValue	float	-9999.0
attribute	pH_discrete	actual_range	float	7.784, 8.122
attribute	pH_discrete	colorBarMaximum	double	9.0
attribute	pH_discrete	colorBarMinimum	double	7.0
attribute	pH_discrete	description	String	pH measured from discrete water samples, laboratory value was corrected for temperature, pressure, and salinity using pyCO2SYS
attribute	pH_discrete	ioos_category	String	Salinity
attribute	pH_discrete	long_name	String	pH (Water Sample)
attribute	pH_discrete	standard_name	String	sea_water_ph_reported_on_total_scale
attribute	pH_discrete	units	String	1
variable	pH_diff		float
attribute	pH_diff	_FillValue	float	-9999.0
attribute	pH_diff	actual_range	float	-0.065, 0.088
attribute	pH_diff	colorBarMaximum	double	10.0
attribute	pH_diff	colorBarMinimum	double	-10.0
attribute	pH_diff	description	String	pH_glider minus pH_discrete
attribute	pH_diff	ioos_category	String	Salinity
attribute	pH_diff	long_name	String	pH Difference
attribute	pH_diff	units	String	1
variable	TA_glider		float
attribute	TA_glider	_FillValue	float	-9999.0
attribute	TA_glider	actual_range	float	1994.0, 2220.0
attribute	TA_glider	description	String	Calculated from glider-based salinity using a linear relationship determined from in-situ water sampling data taken during glider deployment and recovery in addition to ship-based water samples as described in Wright-Fairbanks et al 2020 https://doi.org/10.1029/2020JC016505. This value is median glider-based TA at depth +/- 1m
attribute	TA_glider	ioos_category	String	CO2
attribute	TA_glider	long_name	String	Total Alkalinity (Glider)
attribute	TA_glider	units	String	micromoles kg-1
variable	TA_discrete		float
attribute	TA_discrete	_FillValue	float	-9999.0
attribute	TA_discrete	actual_range	float	1909.0, 2231.0
attribute	TA_discrete	description	String	Total alkalinity measured from discrete water samples
attribute	TA_discrete	ioos_category	String	CO2
attribute	TA_discrete	long_name	String	Total Alkalinity (Water Sample)
attribute	TA_discrete	units	String	micromoles kg-1
variable	TA_diff		float
attribute	TA_diff	_FillValue	float	-9999.0
attribute	TA_diff	actual_range	float	-75.0, 86.0
attribute	TA_diff	colorBarMaximum	double	10.0
attribute	TA_diff	colorBarMinimum	double	-10.0
attribute	TA_diff	description	String	TA_glider minus TA_discrete
attribute	TA_diff	ioos_category	String	CO2
attribute	TA_diff	long_name	String	Total Alkalinity Difference
attribute	TA_diff	units	String	micromoles kg-1
variable	temperature_glider		float
attribute	temperature_glider	_FillValue	float	-9999.0
attribute	temperature_glider	actual_range	float	4.2, 25.0
attribute	temperature_glider	colorBarMaximum	double	32.0
attribute	temperature_glider	colorBarMinimum	double	0.0
attribute	temperature_glider	description	String	Median sea water temperature measured by the glider at depth +/- 1m
attribute	temperature_glider	ioos_category	String	Temperature
attribute	temperature_glider	long_name	String	Sea Water Temperature (Glider)
attribute	temperature_glider	standard_name	String	sea_water_temperature
attribute	temperature_glider	units	String	degree_C
variable	temperature_discrete		float
attribute	temperature_discrete	_FillValue	float	-9999.0
attribute	temperature_discrete	actual_range	float	4.2, 24.9
attribute	temperature_discrete	colorBarMaximum	double	32.0
attribute	temperature_discrete	colorBarMinimum	double	0.0
attribute	temperature_discrete	description	String	Sea water temperature of the discrete water sample
attribute	temperature_discrete	ioos_category	String	Temperature
attribute	temperature_discrete	long_name	String	Sea Water Temperature (Water Sample)
attribute	temperature_discrete	standard_name	String	sea_water_temperature
attribute	temperature_discrete	units	String	degree_C
variable	salinity_glider		float
attribute	salinity_glider	_FillValue	float	-9999.0
attribute	salinity_glider	actual_range	float	28.97, 32.97
attribute	salinity_glider	colorBarMaximum	double	37.0
attribute	salinity_glider	colorBarMinimum	double	32.0
attribute	salinity_glider	description	String	Median glider-based salinity at depth +/- 1m
attribute	salinity_glider	ioos_category	String	Salinity
attribute	salinity_glider	long_name	String	Salinity (Glider)
attribute	salinity_glider	standard_name	String	sea_water_practical_salinity
attribute	salinity_glider	units	String	1
variable	salinity_discrete		float
attribute	salinity_discrete	_FillValue	float	-9999.0
attribute	salinity_discrete	actual_range	float	28.95, 33.03
attribute	salinity_discrete	colorBarMaximum	double	37.0
attribute	salinity_discrete	colorBarMinimum	double	32.0
attribute	salinity_discrete	description	String	Salinity of the discrete water sample
attribute	salinity_discrete	ioos_category	String	Salinity
attribute	salinity_discrete	long_name	String	Salinity (Water Sample)
attribute	salinity_discrete	standard_name	String	sea_water_practical_salinity
attribute	salinity_discrete	units	String	1
variable	notes		String
attribute	notes	ioos_category	String	Unknown
attribute	notes	long_name	String	Notes

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.