ERDDAP > info > bcodmo_dataset_957644_v1

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
		data	graph		files	public	[TA HDPE glass bottle comparison] - Total alkalinity determined through experiments comparing usage of high-density polyethylene (HDPE) and borosilicate glass bottles for collection and storage of water samples collected on the GEOTRACES GP17-OCE cruise (R/V Roger Revelle RR2214) (US GEOTRACES GP17-OCE and GP17-ANT: Inorganic Carbon Cycling in the South Pacific and Southern Oceans by Direct Measurement)		F   I   M	background			BCO-DMO	bcodmo_dataset_957644_v1

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	cdm_data_type	String	Other
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_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.957644.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-75.09732
attribute	NC_GLOBAL	geospatial_lat_max	double	-19.99984
attribute	NC_GLOBAL	geospatial_lat_min	double	-67.00024
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-75.09732
attribute	NC_GLOBAL	geospatial_lon_min	double	-152.0003
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://osprey.bco-dmo.org/dataset/957644
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	license	String	The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
attribute	NC_GLOBAL	Northernmost_Northing	double	-19.99984
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	-67.00024
attribute	NC_GLOBAL	summary	String	Total alkalinity plays an important role in buffering seawater and determining how much anthropogenic carbon dioxide the oceans can absorb and mitigate the rise in atmospheric concentrations. Total alkalinity varies with location, depth, and time making it an important variable needed to quantify and monitor ocean acidification, and potentially for ocean alkalinity enhancement interventions. Currently, best practices are to use expensive high quality borosilicate glass bottles for collecting and storing these samples. However, unlike other carbon system variables, total alkalinity is not affected by gas exchange meaning plastic bottles may be suitable for total alkalinity sample storage. Plastic bottles are lighter, cheaper, and less prone to breakage making them easier to handle and ship. Here, we test the suitability of high-density polyethylene (HDPE) for collection and long-term storage of total alkalinity samples. Duplicate samples were collected in standard borosilicate glass bottles and HDPE bottles on GEOTRACES GP17-OCE. The samples were analyzed in the laboratory over a year later and the storage methods were compared. It was determined that HDPE is not suitable for long-term storage of total alkalinity samples as there were large changes in total alkalinity over time and precision of duplicate samples was very poor. We hypothesize that HDPE plastic is slightly porous leading to leaching of alkalinity either into or out of the bottle over time impacting the value of the sample. Use of HDPE bottles for total alkalinity samples is not recommended for long term sample storage.
attribute	NC_GLOBAL	time_coverage_end	String	2023-01-24T03:21:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2022-12-04T00:38:00Z
attribute	NC_GLOBAL	title	String	[TA HDPE glass bottle comparison] - Total alkalinity determined through experiments comparing usage of high-density polyethylene (HDPE) and borosilicate glass bottles for collection and storage of water samples collected on the GEOTRACES GP17-OCE cruise (R/V Roger Revelle RR2214) (US GEOTRACES GP17-OCE and GP17-ANT: Inorganic Carbon Cycling in the South Pacific and Southern Oceans by Direct Measurement)
attribute	NC_GLOBAL	Westernmost_Easting	double	-152.0003
variable	GEOTRACES_sample		int
attribute	GEOTRACES_sample	actual_range	int	15907, 18755
attribute	GEOTRACES_sample	long_name	String	Geotraces_sample
attribute	GEOTRACES_sample	units	String	unitless
variable	Event_number		String
attribute	Event_number	long_name	String	Event_number
attribute	Event_number	units	String	unitless
variable	Date		String
attribute	Date	long_name	String	Date
attribute	Date	units	String	unitless
variable	time_unitless		String
attribute	time_unitless	long_name	String	Time
attribute	time_unitless	units	String	unitless
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.67011428E9, 1.67453046E9
attribute	time	axis	String	T
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Iso_datetime_utc
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	Sample_ID		int
attribute	Sample_ID	actual_range	int	10301, 380215
attribute	Sample_ID	long_name	String	Sample_id
attribute	Sample_ID	units	String	unitless
variable	Station		float
attribute	Station	actual_range	float	1.0, 38.0
attribute	Station	long_name	String	Station
attribute	Station	units	String	unitless
variable	Cast		int
attribute	Cast	actual_range	int	1, 14
attribute	Cast	long_name	String	Cast
attribute	Cast	units	String	unitless
variable	Niskin		int
attribute	Niskin	actual_range	int	1, 35
attribute	Niskin	long_name	String	Niskin
attribute	Niskin	units	String	unitless
variable	latitude		float
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	actual_range	float	-67.00024, -19.99984
attribute	latitude	axis	String	Y
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	longitude		float
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	actual_range	float	-152.0003, -75.09732
attribute	longitude	axis	String	X
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Long
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	Pressure		float
attribute	Pressure	actual_range	float	2.0, 5737.2
attribute	Pressure	long_name	String	Pressure
attribute	Pressure	units	String	decibars (db)
variable	Practical_Salinity		float
attribute	Practical_Salinity	actual_range	float	33.4223, 36.2073
attribute	Practical_Salinity	long_name	String	Practical_salinity
attribute	Practical_Salinity	units	String	PSU
variable	Total_Alkalinity_glass_bottle		float
attribute	Total_Alkalinity_glass_bottle	actual_range	float	2234.85, 2450.15
attribute	Total_Alkalinity_glass_bottle	long_name	String	Total_alkalinity_glass_bottle
attribute	Total_Alkalinity_glass_bottle	units	String	micromoles per kilogram seawater (umol/kg_sw)
variable	Total_Alkalinity_Flag_glass_bottle		int
attribute	Total_Alkalinity_Flag_glass_bottle	actual_range	int	2, 6
attribute	Total_Alkalinity_Flag_glass_bottle	long_name	String	Total_alkalinity_flag_glass_bottle
attribute	Total_Alkalinity_Flag_glass_bottle	units	String	unitless
variable	Total_Alkalinity_HDPE_bottle		float
attribute	Total_Alkalinity_HDPE_bottle	actual_range	float	2097.87, 2414.91
attribute	Total_Alkalinity_HDPE_bottle	long_name	String	Total_alkalinity_hdpe_bottle
attribute	Total_Alkalinity_HDPE_bottle	units	String	micromoles per kilogram seawater (umol/kg_sw)
variable	Total_Alkalinity_Flag_HDPE_bottle		int
attribute	Total_Alkalinity_Flag_HDPE_bottle	actual_range	int	2, 6
attribute	Total_Alkalinity_Flag_HDPE_bottle	long_name	String	Total_alkalinity_flag_hdpe_bottle
attribute	Total_Alkalinity_Flag_HDPE_bottle	units	String	unitless

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.