BCO-DMO ERDDAP
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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/ (external link)
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 (external link)
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\nfor legal use, since it may contain inaccuracies. Neither the data\nContributor, ERD, NOAA, nor the United States Government, nor any\nof their employees or contractors, makes any warranty, express or\nimplied, including warranties of merchantability and fitness for a\nparticular purpose, or assumes any legal liability for the accuracy,\ncompleteness, 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. \n \nIn 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. \n \nIn 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. \n \nIn 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. \n \nIn 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. \n \nSamples 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)

 
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