ERDDAP > info > bcodmo_dataset_957694_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 bottle storage test] - Total alkalinity from an experiment testing the suitability of high-density polyethylene (HDPE) for collection and long-term storage of total alkalinity samples using laboratory-manipulated oligotrophic Atlantic surface water (US GEOTRACES GP17- OCE and GP17-ANT: Inorganic Carbon Cycling in the South Pacific and Southern Oceans by Direct Measurement)		M	background			BCO-DMO	bcodmo_dataset_957694_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	doi	String	10.26008/1912/bco-dmo.957694.1
attribute	NC_GLOBAL	infoUrl	String	https://osprey.bco-dmo.org/dataset/957694
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	sourceUrl	String	(local files)
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 through laboratory experiments where HDPE bottles were treated to different cleaning methods and then filled with surface seawater and stored for 15-17 months before analyzing for total alkalinity. 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	title	String	[TA HDPE bottle storage test] - Total alkalinity from an experiment testing the suitability of high-density polyethylene (HDPE) for collection and long-term storage of total alkalinity samples using laboratory-manipulated oligotrophic Atlantic surface water (US GEOTRACES GP17-OCE and GP17-ANT: Inorganic Carbon Cycling in the South Pacific and Southern Oceans by Direct Measurement)
variable	Bottle_ID		String
attribute	Bottle_ID	long_name	String	Bottle_id
attribute	Bottle_ID	units	String	unitless
variable	Soak_solution		String
attribute	Soak_solution	long_name	String	Soak_solution
attribute	Soak_solution	units	String	unitless
variable	Soak_Duration		int
attribute	Soak_Duration	actual_range	int	0, 2
attribute	Soak_Duration	long_name	String	Soak_duration
attribute	Soak_Duration	units	String	weeks
variable	Bottle_Number		int
attribute	Bottle_Number	actual_range	int	1, 23
attribute	Bottle_Number	long_name	String	Bottle_number
attribute	Bottle_Number	units	String	unitless
variable	Analysis_Date_Time_EST		String
attribute	Analysis_Date_Time_EST	long_name	String	Analysis_date_time_est
attribute	Analysis_Date_Time_EST	units	String	unitless
variable	Total_Alkalinity		float
attribute	Total_Alkalinity	actual_range	float	2213.75, 2358.58
attribute	Total_Alkalinity	long_name	String	Total_alkalinity
attribute	Total_Alkalinity	units	String	micromoles per kilogram seawater (umol/kg_sw)
variable	Analysis_Flag		int
attribute	Analysis_Flag	actual_range	int	2, 5
attribute	Analysis_Flag	long_name	String	Analysis_flag
attribute	Analysis_Flag	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.