ERDDAP > info > bcodmo_dataset_959033_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	[nGoM benthic chamber between July 2021 and July 2022] - Benthic chamber geochemical data obtained with an in situ benthic lander from the R/V Savannah at sampling stations across the Louisiana shelf and slope in the Northern Gulf of Mexico during four cruise between July 2021 and July 2022 (Importance of Riverine Discharge on the Benthic Flux of Alkalinity to Continental Margins)		F   I   M	background			BCO-DMO	bcodmo_dataset_959033_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.959033.1
attribute	NC_GLOBAL	Easternmost_Easting	double	28.94785
attribute	NC_GLOBAL	geospatial_lat_max	double	-88.60532
attribute	NC_GLOBAL	geospatial_lat_min	double	-91.33712
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	28.94785
attribute	NC_GLOBAL	geospatial_lon_min	double	28.19917
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://osprey.bco-dmo.org/dataset/959033
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	-88.60532
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	-91.33712
attribute	NC_GLOBAL	summary	String	This data set reports benthic flux measurements of dissolved inorganic carbon (DIC), orthophosphate (SPO43-), ammonium (NH4+), total alkalinity (TA), carbon isotopic fractionation of DIC (13-C-DIC), dissolved manganese (Mnd), dissolved calcium (Cad), nitrate (NO3-), and excess bromide (Br-) injected in the chamber as chemical tracer. In summer 2021, benthic flux data were obtained from benthic chamber deployments at eleven different stations on the Louisiana Shelf and slope in the Northern Gulf of Mexico during July 15-27, 2021 using two different benthic landers. These stations span two transects, one from the middle of the shelf offshore from Cocodrie, LA to the mouth of the Mississippi River North West Pass, and another from North West Pass of the Mississippi River mouth to the south, across the slope. A single station (St. 15) was also sampled on the eastern side of the second transect in the transition from the shelf break to the mid-slope. All benthic chamber samples were processed within an hour after collection. In fall 2021, benthic flux data were obtained from benthic chamber deployments at ten different stations on the Louisiana Shelf and slope in the Northern Gulf of Mexico between October 25 and November 10, 2021 using two different benthic landers. These stations span two transects, one from the middle of the shelf offshore from Cocodrie, LA to the mouth of the Mississippi River South West Pass, and another from South West Pass of the Mississippi River mouth to the south, across the slope. Two stations (St. 15 and St. 12) were also sampled on a second transect from the shelf break to the slope southeast of the Bird's Foot. In spring 2022, benthic flux data were obtained from benthic chamber deployments at ten different stations on the Louisiana Shelf and slope in the Northern Gulf of Mexico during April 9-20, 2021 using two different benthic landers. These stations span two transects, one from the middle of the shelf offshore from Cocodrie, LA to the mouth of the Mississippi River South West Pass, and another from South West Pass of the Mississippi River mouth to the south, across the slope. Two stations (St. 15 and St. 12) were also sampled on a second transect from the shelf break to the slope southeast of the Bird's Foot. In summer 2022, benthic flux data were obtained from benthic chamber deployments at eleven different stations on the Louisiana Shelf and slope in the Northern Gulf of Mexico in July 9 -23, 2022 using two different benthic landers. These stations span two transects, one from the middle of the shelf offshore from Cocodrie, LA to the mouth of the Mississippi River South West Pass, and another from South West Pass of the Mississippi River mouth to the south, across the slope. Two stations (St. 15 and St. 12) were also sampled on a second transect from the shelf break to the slope southeast of the Bird's Foot. Samples were immediately filtered through 0.22-micrometer (µm) PSE syringe filters and either analyzed immediately onboard (SPO43-), preserved acidified with hydrochloric acid at 4 degrees Celsius (Cad, Mnd), frozen (NH4+, NO3-, Br-), or preserved at 4 degrees Celsius after addition of HgCl2 (TA) until analysis. In addition, samples for DIC, TA, and carbon isotopic analyses were preserved in glass bottles, whereas other samples were preserved in polypropylene containers. DIC and TA were analyzed by Gran titration (Gran, 1952) using temperature-controlled closed cells (Dickson et al. 2007), orthophosphate and ammonium by spectrophotometry (Murphy and Riley, 1962; Strickland and Parsons, 1972), the carbon isotopic signature by isotope ratio mass spectrometry (Wang et al, 2018), Mnd and Cad by ICP-MS (Magette et al., 2025 In review), and NO3- and Br- by high performance liquid chromatography (HPLC) (Beckler et al., 2014). In summer 2022, benthic chamber and pore water DIC and TA samples were analyzed by cavity ring-down spectrometry (CRDS, Picarro G2131-i) with an automatic CO2 extraction system (Apollo SciTech AS-D1) and open-cell potentiometric titrations, respectively (Ferreira et al., 2025).
attribute	NC_GLOBAL	title	String	[nGoM benthic chamber between July 2021 and July 2022] - Benthic chamber geochemical data obtained with an in situ benthic lander from the R/V Savannah at sampling stations across the Louisiana shelf and slope in the Northern Gulf of Mexico during four cruise between July 2021 and July 2022 (Importance of Riverine Discharge on the Benthic Flux of Alkalinity to Continental Margins)
attribute	NC_GLOBAL	Westernmost_Easting	double	28.19917
variable	Date		String
attribute	Date	long_name	String	Date
attribute	Date	units	String	unitless
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	Cruise_ID		String
attribute	Cruise_ID	long_name	String	Cruise_id
attribute	Cruise_ID	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	latitude		float
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	actual_range	float	-91.33712, -88.60532
attribute	latitude	axis	String	Y
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Lon
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	28.19917, 28.94785
attribute	longitude	axis	String	X
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Lat
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	sample_ID		int
attribute	sample_ID	actual_range	int	1, 18
attribute	sample_ID	long_name	String	Sample_id
attribute	sample_ID	units	String	unitless
variable	Time_h		float
attribute	Time_h	actual_range	float	0.2, 31.37
attribute	Time_h	long_name	String	Time_h
attribute	Time_h	units	String	hours (h)
variable	DIC_mM		float
attribute	DIC_mM	actual_range	float	2.07, 2.72
attribute	DIC_mM	long_name	String	Dic_mm
attribute	DIC_mM	units	String	millimolar (mM)
variable	sdDIC_mM		float
attribute	sdDIC_mM	actual_range	float	0.0, 0.07
attribute	sdDIC_mM	long_name	String	Sddic_mm
attribute	sdDIC_mM	units	String	millimolar (mM)
variable	PO4_uM		float
attribute	PO4_uM	actual_range	float	0.0, 3.66
attribute	PO4_uM	long_name	String	Po4_um
attribute	PO4_uM	units	String	micromolar (uM)
variable	sdPO4_uM		float
attribute	sdPO4_uM	actual_range	float	0.0, 0.16
attribute	sdPO4_uM	long_name	String	Sdpo4_um
attribute	sdPO4_uM	units	String	micromolar (uM)
variable	NH4_uM		float
attribute	NH4_uM	actual_range	float	0.0, 69.83
attribute	NH4_uM	long_name	String	Nh4_um
attribute	NH4_uM	units	String	micromolar (uM)
variable	sdNH4_uM		float
attribute	sdNH4_uM	actual_range	float	0.0, 1.19
attribute	sdNH4_uM	long_name	String	Sdnh4_um
attribute	sdNH4_uM	units	String	micromolar (uM)
variable	TA_mM		float
attribute	TA_mM	actual_range	float	2.15, 3.13
attribute	TA_mM	long_name	String	Ta_mm
attribute	TA_mM	units	String	millimolar (mM)
variable	sdTA_mM		float
attribute	sdTA_mM	actual_range	float	0.0, 0.08
attribute	sdTA_mM	long_name	String	Sdta_mm
attribute	sdTA_mM	units	String	millimolar (mM)
variable	d13C_DIC_permille		float
attribute	d13C_DIC_permille	actual_range	float	-3.83, 0.51
attribute	d13C_DIC_permille	long_name	String	D13c_dic_permille
attribute	d13C_DIC_permille	units	String	per mille
variable	sdd13C_DIC_permille		float
attribute	sdd13C_DIC_permille	actual_range	float	0.01, 0.43
attribute	sdd13C_DIC_permille	long_name	String	Sdd13c_dic_permille
attribute	sdd13C_DIC_permille	units	String	per mille
variable	Mnd_uM		float
attribute	Mnd_uM	actual_range	float	0.01, 9.04
attribute	Mnd_uM	long_name	String	Mnd_um
attribute	Mnd_uM	units	String	micromolar (uM)
variable	sdMnd_uM		float
attribute	sdMnd_uM	actual_range	float	0.0, 0.23
attribute	sdMnd_uM	long_name	String	Sdmnd_um
attribute	sdMnd_uM	units	String	micromolar (uM)
variable	Cad_mM		float
attribute	Cad_mM	actual_range	float	9.23, 11.55
attribute	Cad_mM	long_name	String	Cad_mm
attribute	Cad_mM	units	String	millimolar (mM)
variable	sdCad_mM		float
attribute	sdCad_mM	actual_range	float	0.01, 0.27
attribute	sdCad_mM	long_name	String	Sdcad_mm
attribute	sdCad_mM	units	String	millimolar (mM)
variable	NO3_uM		float
attribute	NO3_uM	actual_range	float	0.09, 74.23
attribute	NO3_uM	long_name	String	No3_um
attribute	NO3_uM	units	String	micromolar (uM)
variable	sdNO3_uM		float
attribute	sdNO3_uM	actual_range	float	0.0, 1.94
attribute	sdNO3_uM	long_name	String	Sdno3_um
attribute	sdNO3_uM	units	String	micromolar (uM)
variable	ExBr_mM		float
attribute	ExBr_mM	actual_range	float	-0.44, 5.86
attribute	ExBr_mM	long_name	String	Exbr_mm
attribute	ExBr_mM	units	String	millimolar (mM)
variable	sdExBr_mM		float
attribute	sdExBr_mM	actual_range	float	0.0, 0.27
attribute	sdExBr_mM	long_name	String	Sdexbr_mm
attribute	sdExBr_mM	units	String	millimolar (mM)

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.