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.925569.1
attribute NC_GLOBAL Easternmost_Easting double -106.0
attribute NC_GLOBAL geospatial_lon_max double -106.0
attribute NC_GLOBAL geospatial_lon_min double -107.0
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 500.0
attribute NC_GLOBAL geospatial_vertical_min double 10.0
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/925569 (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 Changes in chromium (Cr) isotope ratios due to fractionation between trivalent (Cr(III)) and hexavalent (Cr(VI)) are being utilized by geologists to infer oxygen conditions in past environments. But there is little information available on Cr in the modern ocean to ground-truth these inferences. Transformations between the two chromium redox species are important processes in oceanic Cr cycling. Here we present profiles of hexavalent and trivalent Cr concentrations and stable isotope ratios from the Eastern Tropical North Pacific (ETNP) oxygen deficient zone (ODZ) which support theoretical and experimental studies that predict that lighter Cr is preferentially reduced in low oxygen environments, and that residual dissolved Cr becomes heavier due to removal of particle-reactive Cr(III) on sinking particles. The Cr(III) maximum dominantly occurs in the upper portion of the ODZ, implying that microbial activity (dependent on the sinking flux of organic matter) may be the dominant mechanism for this transformation, rather than a simple inorganic chemical conversion between the species depending on the redox potential.
attribute NC_GLOBAL title String [Cr concentration and isotope data using dissolved Cr and different Cr species from RR1805] - Chromium (Cr) concentration and isotope data determined using dissolved Cr and different Cr species from samples collected on R/V Roger Revelle cruise RR1805 in April-May 2018 (Cr Isotope Oceanography of the Eastern Tropical North Pacific Ocean)
attribute NC_GLOBAL Westernmost_Easting double -107.0
variable Cruise String
attribute Cruise long_name String Cruise
attribute Cruise units String unitless
variable Station String
attribute Station long_name String Station
attribute Station units String unitless
variable Latitude float
attribute Latitude actual_range float 17.0, 20.2
attribute Latitude long_name String Latitude
attribute Latitude units String degrees_north
variable longitude float
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range float -107.0, -106.0
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 depth int
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth actual_range int 10, 500
attribute depth axis String Z
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable Total_dissolved_Cr float
attribute Total_dissolved_Cr actual_range float 2.29, 3.21
attribute Total_dissolved_Cr long_name String Total_dissolved_cr
attribute Total_dissolved_Cr units String nanomoles per kilogram (nmol/kg)
variable Total_dissolved_d53Cr float
attribute Total_dissolved_d53Cr actual_range float 1.04, 1.32
attribute Total_dissolved_d53Cr long_name String Total_dissolved_d53cr
attribute Total_dissolved_d53Cr units String permil (‰)
variable CrIII float
attribute CrIII actual_range float 0.85, 2.16
attribute CrIII long_name String Criii
attribute CrIII units String nanomoles per kilogram (nmol/kg)
variable d53CrIII float
attribute d53CrIII actual_range float -0.14, 0.31
attribute d53CrIII long_name String D53criii
attribute d53CrIII units String permil (‰)
variable CrIII_pcnt_of_total float
attribute CrIII_pcnt_of_total actual_range float 26.0, 79.0
attribute CrIII_pcnt_of_total long_name String Criii_pcnt_of_total
attribute CrIII_pcnt_of_total units String percent (%)
variable Calculated_CrVI float
attribute Calculated_CrVI actual_range float 0.58, 2.36
attribute Calculated_CrVI long_name String Calculated_crvi
attribute Calculated_CrVI units String nanomoles per kilogram (nmol/kg)
variable Calculated_d53CrVI float
attribute Calculated_d53CrVI actual_range float 1.5, 5.33
attribute Calculated_d53CrVI long_name String Calculated_d53crvi
attribute Calculated_d53CrVI units String permil (‰)
variable Measured_CrVI float
attribute Measured_CrVI actual_range float 0.99, 1.52
attribute Measured_CrVI long_name String Measured_crvi
attribute Measured_CrVI units String nanomoles per kilogram (nmol/kg)
variable Measured_d53Cr float
attribute Measured_d53Cr actual_range float 2.23, 2.98
attribute Measured_d53Cr long_name String Measured_d53cr
attribute Measured_d53Cr units String permil (‰)

 
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