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| griddap | Subset | tabledap | Make A Graph | wms | files | Accessible | Title | Summary | FGDC | ISO 19115 | Info | Background Info | RSS | Institution | Dataset ID | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_925569_v1 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_925569_v1.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_925569_v1/ | public | [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) | 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.\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nStation (unitless)\nLatitude (degrees_north)\nlongitude (degrees_east)\ndepth (m)\nTotal_dissolved_Cr (nanomoles per kilogram (nmol/kg))\nTotal_dissolved_d53Cr (permil (‰))\nCrIII (nanomoles per kilogram (nmol/kg))\nd53CrIII (permil (‰))\nCrIII_pcnt_of_total (percent (%))\nCalculated_CrVI (nanomoles per kilogram (nmol/kg))\nCalculated_d53CrVI (permil (‰))\nMeasured_CrVI (nanomoles per kilogram (nmol/kg))\nMeasured_d53Cr (permil (‰))\n | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_925569_v1/index.htmlTable | https://www.bco-dmo.org/dataset/925569
| https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_925569_v1.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_925569_v1&showErrors=false&email= | BCO-DMO | bcodmo_dataset_925569_v1 |