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.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 (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 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.\n\nThe 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)

 
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