ERDDAP > info > bcodmo_dataset_904417_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	[Northern Gulf of Mexico pore water constituents Fall 2020] - Depth profiles of pore water constituents from sediment cores collected on the Louisiana Shelf of the Northern Gulf of Mexico during November 2020 on R/V Savannah cruise SAV-20-07 (Importance of Riverine Discharge on the Benthic Flux of Alkalinity to Continental Margins)		M	background			BCO-DMO	bcodmo_dataset_904417_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.904417.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-89.59939
attribute	NC_GLOBAL	geospatial_lon_max	double	-89.59939
attribute	NC_GLOBAL	geospatial_lon_min	double	-90.30405
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/904417
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	This data set reports depth profiles of pore water concentrations of dissolved inorganic carbon (DIC), orthophosphate (PO43-), ammonium (NH4+), total alkalinity (TA), carbon isotopic fractionation of DIC (13C-DIC), dissolved manganese (Mnd), dissolved calcium (Cad), reduced iron (Fe(II)), total dissolved Fe (Fed), and dissolved Fe(III) (Fe(III)d) by the difference of total dissolved Fe and Fe(II). These pore water data were obtained from sediment cores collected at five different stations on the Louisiana Shelf on the Northern Gulf of Mexico during the week of November 3-6, 2020 using an MC-800 multi-corer. These stations extend from the middle of the shelf offshore from Cocodrie, LA to the mouth of the Mississippi River North West Pass. All cores were processed within a few hours after collection. The field sampling was conducted during R/V Savannah cruise SAV-20-07. The pore waters were first extracted by slicing sediment cores of < 25 centimeters (cm) long and centrifugation of the pore waters under N2 atmosphere to avoid air contamination. Pore waters were then immediately filtered through 0.22-micrometer (um) PSE syringe filters under N2 atmosphere and either analyzed immediately onboard (Fe speciation, orthophosphate, DIC), preserved acidified with hydrochloric acid at 4 degrees Celsius (Cad, Mnd), frozen (ammonium), or preserved at 4 degrees Celsius after addition of HgCl2 (TA) until analysis. In addition, samples for TA and carbon isotopic analyses were preserved in glass bottles, whereas other samples were preserved in polypropylene containers. DIC was analyzed by flow injection analysis (Hall and Aller, 1992), orthophosphate, ammonium, and Fe speciation by spectrophotometry (Murphy and Riley, 1962; Strickland and Parsons, 1972; Stookey, 1970), TA by Gran titration (Gran, 1952), the carbon isotopic signature by isotope ratio mass spectrometry (Wang et al, 2018), and Mnd and Cad by ICP-MS (Magette et al., 2023 In preparation). "nd" in the spreadsheet is provided when samples were not analyzed for these species ("nd" = not determined).
attribute	NC_GLOBAL	title	String	[Northern Gulf of Mexico pore water constituents Fall 2020] - Depth profiles of pore water constituents from sediment cores collected on the Louisiana Shelf of the Northern Gulf of Mexico during November 2020 on R/V Savannah cruise SAV-20-07 (Importance of Riverine Discharge on the Benthic Flux of Alkalinity to Continental Margins)
attribute	NC_GLOBAL	Westernmost_Easting	double	-90.30405
variable	Year		String
attribute	Year	long_name	String	Year
attribute	Year	units	String	unitless
variable	Month		String
attribute	Month	long_name	String	Month
attribute	Month	units	String	unitless
variable	Day		String
attribute	Day	long_name	String	Day
attribute	Day	units	String	unitless
variable	Date		String
attribute	Date	long_name	String	Date
attribute	Date	units	String	unitless
variable	Collection_Type		String
attribute	Collection_Type	long_name	String	Collection_type
attribute	Collection_Type	units	String	unitless
variable	Station		String
attribute	Station	long_name	String	Station
attribute	Station	units	String	unitless
variable	longitude		float
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	actual_range	float	-90.30405, -89.59939
attribute	longitude	axis	String	X
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	Lat		float
attribute	Lat	actual_range	float	28.60353, 28.91338
attribute	Lat	long_name	String	Lat
attribute	Lat	units	String	degrees_north
variable	sample_ID		int
attribute	sample_ID	actual_range	int	0, 23
attribute	sample_ID	long_name	String	Sample_id
attribute	sample_ID	units	String	unitless
variable	Sediment_depth_cm		float
attribute	Sediment_depth_cm	actual_range	float	0.0, 36.7
attribute	Sediment_depth_cm	long_name	String	Sediment_depth_cm
attribute	Sediment_depth_cm	units	String	centimeters (cm)
variable	DIC		float
attribute	DIC	actual_range	float	1.79141, 7.72583
attribute	DIC	long_name	String	Dic
attribute	DIC	units	String	millimoles per liter (mM)
variable	sd_DIC		float
attribute	sd_DIC	actual_range	float	0.00254, 0.19895
attribute	sd_DIC	long_name	String	Sd_dic
attribute	sd_DIC	units	String	millimoles per liter (mM)
variable	PO4		float
attribute	PO4	actual_range	float	0.234, 111.886
attribute	PO4	long_name	String	Po4
attribute	PO4	units	String	micromoles per liter (uM)
variable	sd_PO4		float
attribute	sd_PO4	actual_range	float	0.009, 1.721
attribute	sd_PO4	long_name	String	Sd_po4
attribute	sd_PO4	units	String	micromoles per liter (uM)
variable	NH4		float
attribute	NH4	actual_range	float	7.034, 4453.495
attribute	NH4	long_name	String	Nh4
attribute	NH4	units	String	micromoles per liter (uM)
variable	sd_NH4		float
attribute	sd_NH4	actual_range	float	0.334, 327.583
attribute	sd_NH4	long_name	String	Sd_nh4
attribute	sd_NH4	units	String	micromoles per liter (uM)
variable	TA		float
attribute	TA	actual_range	float	2.39117, 9.0595
attribute	TA	long_name	String	Ta
attribute	TA	units	String	millimoles per liter (mM)
variable	sd_TA		float
attribute	sd_TA	actual_range	float	8.06576E-4, 0.49991
attribute	sd_TA	long_name	String	Sd_ta
attribute	sd_TA	units	String	millimoles per liter (mM)
variable	d13C_DIC		float
attribute	d13C_DIC	actual_range	float	-14.408, 0.2745
attribute	d13C_DIC	long_name	String	D13c_dic
attribute	d13C_DIC	units	String	per mil (‰)
variable	sd_d13C_DIC		float
attribute	sd_d13C_DIC	actual_range	float	0.00236, 0.27035
attribute	sd_d13C_DIC	long_name	String	Sd_d13c_dic
attribute	sd_d13C_DIC	units	String	per mil (‰)
variable	Mnd		float
attribute	Mnd	actual_range	float	0.05889, 625.1616
attribute	Mnd	long_name	String	Mnd
attribute	Mnd	units	String	micromoles per liter (uM)
variable	sd_Mnd		float
attribute	sd_Mnd	actual_range	float	0.00777, 16.72205
attribute	sd_Mnd	long_name	String	Sd_mnd
attribute	sd_Mnd	units	String	micromoles per liter (uM)
variable	Cad		float
attribute	Cad	actual_range	float	9.363, 12.364
attribute	Cad	long_name	String	Cad
attribute	Cad	units	String	millimoles per liter (mM)
variable	sd_Cad		float
attribute	sd_Cad	actual_range	float	0.016, 0.216
attribute	sd_Cad	long_name	String	Sd_cad
attribute	sd_Cad	units	String	millimoles per liter (mM)
variable	Fe_II		float
attribute	Fe_II	actual_range	float	0.105, 32.674
attribute	Fe_II	long_name	String	Fe_ii
attribute	Fe_II	units	String	micromoles per liter (uM)
variable	sd_Fe_II		float
attribute	sd_Fe_II	actual_range	float	0.061, 19.298
attribute	sd_Fe_II	long_name	String	Sd_fe_ii
attribute	sd_Fe_II	units	String	micromoles per liter (uM)
variable	Fed		float
attribute	Fed	actual_range	float	0.0, 61.019
attribute	Fed	long_name	String	Fed
attribute	Fed	units	String	micromoles per liter (uM)
variable	sd_Fed		float
attribute	sd_Fed	actual_range	float	0.145, 2.03
attribute	sd_Fed	long_name	String	Sd_fed
attribute	sd_Fed	units	String	micromoles per liter (uM)
variable	Fe_III_d		float
attribute	Fe_III_d	actual_range	float	0.0, 44.752
attribute	Fe_III_d	long_name	String	Fe_iii_d
attribute	Fe_III_d	units	String	micromoles per liter (uM)
variable	sd_Fe_III_d		float
attribute	sd_Fe_III_d	actual_range	float	0.158, 19.317
attribute	sd_Fe_III_d	long_name	String	Sd_fe_iii_d
attribute	sd_Fe_III_d	units	String	micromoles per liter (uM)

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.