{"@context":{"content":"http:\/\/purl.org\/rss\/1.0\/modules\/content\/","dc":"http:\/\/purl.org\/dc\/terms\/","foaf":"http:\/\/xmlns.com\/foaf\/0.1\/","og":"http:\/\/ogp.me\/ns#","rdfs":"http:\/\/www.w3.org\/2000\/01\/rdf-schema#","sioc":"http:\/\/rdfs.org\/sioc\/ns#","sioct":"http:\/\/rdfs.org\/sioc\/types#","skos":"http:\/\/www.w3.org\/2004\/02\/skos\/core#","xsd":"http:\/\/www.w3.org\/2001\/XMLSchema#","owl":"http:\/\/www.w3.org\/2002\/07\/owl#","rdf":"http:\/\/www.w3.org\/1999\/02\/22-rdf-syntax-ns#","rss":"http:\/\/purl.org\/rss\/1.0\/","site":"https:\/\/www.bco-dmo.org\/ns#","odo":"http:\/\/ocean-data.org\/schema\/","emo":"http:\/\/ocean-data.org\/schema\/entity-matching#","bibo":"http:\/\/purl.org\/ontology\/bibo\/","crypto":"http:\/\/id.loc.gov\/vocabulary\/preservation\/cryptographicHashFunctions\/","bcodmo":"http:\/\/lod.bco-dmo.org\/id\/","tw":"http:\/\/tw.rpi.edu\/schema\/","dcat":"http:\/\/www.w3.org\/ns\/dcat#","time":"http:\/\/www.w3.org\/2006\/time#","geo":"http:\/\/www.w3.org\/2003\/01\/geo\/wgs84_pos#","geosparql":"http:\/\/www.opengis.net\/ont\/geosparql#","sf":"http:\/\/www.opengis.net\/ont\/sf#","void":"http:\/\/rdfs.org\/ns\/void#","sd":"http:\/\/www.w3.org\/ns\/sparql-service-description#","dctype":"http:\/\/purl.org\/dc\/dcmitype\/","prov":"http:\/\/www.w3.org\/ns\/prov#","schema":"http:\/\/schema.org\/","geolink":"http:\/\/schema.geolink.org\/1.0\/base\/main#","spdx":"http:\/\/spdx.org\/rdf\/terms#","bcodmo_vocab":"http:\/\/schema.bco-dmo.org\/"},"@id":"http:\/\/lod.bco-dmo.org\/id\/dataset\/821117#graph","@graph":[{"http:\/\/lod.bco-dmo.org\/id\/dataset\/821117":{"@id":"http:\/\/lod.bco-dmo.org\/id\/dataset\/821117","@type":["http:\/\/ocean-data.org\/schema\/DeploymentDatasetCollection","http:\/\/www.w3.org\/ns\/dcat#Dataset","http:\/\/ocean-data.org\/schema\/Dataset"],"http:\/\/ocean-data.org\/schema\/hasAcquisitionDescription":[{"@value":"
Discrete seawater samples and depth, temperature and salinity data were acquired using a SeaBird Electronics rosette, equipped with a CTD (Sea-Bird Electronics SBE 911 plus). Sampling for carbonate system parameters (TA, DIC and pH) commenced immediately after the recovery of the rosette to ship\u2019s deck and employed the standard procedures described by (Dickson et al., 2007), and was followed by sampling for nutrients (TON, SRP, Silica). Samples were kept at room temperature until their analysis. Nutrient samples were collected into 15 ml plastic vials, to which 100 \u03bcL of 0.1 M HCl were added.
\nTotal alkalinity measurements were conducted at Wang\u2019s laboratory at WHOI by a modified Gran titration procedure (Cai et al., 2010; Huang et al., 2012). The titrations were conducted potentiometrically with an automated titrator (AS-ALK2; Apollo SciTech) using an open-cell configuration and a ROSSTM combination electrode (Thermo Fisher Scientific) at a controlled temperature. The titrant (HCl, 0.07 M) concentration was determined by titration of Certified Reference Material (CRM) provided by Dr. A.G. Dickson at the Scripps Institution of Oceanography. The precision and accuracy of total alkalinity measurements is better than \u00b1 2 \u03bcmol kg-1.
\n\u00a0The DIC concentrations were measured at Wang\u2019s laboratory at WHOI, using a NDIR-based DIC autoanalyzer (AS-C3, Apollo SciTech), calibrated with CRM. The NDIR-based DIC analyzer (AS-C3, Apollo SciTech) uses N2 to purge CO2 from a known volume of acidified seawater sample. The CO2 in the resulting gas stream is dried using a Nafion membrane trap, which is constantly flushed with a counter-flow of dried room air. Then, the CO2 content of the gas stream is quantified by a NDIR CO2 analyzer (LI-7000, LICOR). This instrument has a precision and accuracy of better than \u00b12.0 \u03bcmol kg\u22121.
\nDiscrete pH samples were measured in Wang\u2019s lab at WHOI using 10 cm path-length optical cells and analyzed at 25\u00b0C within a few weeks after sampling. Discrete pH measurements were based on the conventional spectrophotometric procedure using purified m-cresol purple as an indicator and 10 cm path-length optical cells (Dickson et al., 2007; Liu et al., 2011) on a HP 8453 spectrophotometer, with a precision of \u00b10.0004 and an accuracy of 0.001-0.002 pH units.\u00a0
\nNutrient (Nitrate, soluble reactive phosphate and silicic acid) measurements were conducted at Lazar\u2019s laboratory at the Inter-University Institute for oceanography in Eilat, Israel. The analysis will be conducted colorimetrically, using a Flow Injection Analyzer (FIA, LACHAT Instruments Quik-Chem 8500) (Grasshoff et al., 2009). Accuracy was obtained by calibration against a commercial, high-concentration standard (Merck).\u00a0\u00a0<\/p>\n
Instruments:
\nDiscrete seawater samples and depth, temperature and salinity data were acquired using a SeaBird Electronics rosette, equipped with a CTD (Sea-Bird Electronics SBE 911 plus).<\/p><\/div>","@type":"rdf:HTML"}],"http:\/\/purl.org\/dc\/terms\/description":[{"@value":"
CO2-system and auxiliary data from the Northern Gulf of Mexico from samples collected during R\/V Pelican cruise PE18-09 in\u00a0September of 2017.<\/p><\/div>","@type":"rdf:HTML"}],"http:\/\/www.w3.org\/2000\/01\/rdf-schema#label":[{"@value":"CO2 system data","@type":"xsd:string"}],"http:\/\/ocean-data.org\/schema\/hasProcessingDescription":[{"@value":"
BCO-DMO Data Manager Processing Notes:
\n* Data submitted in file MSP_BRA_Data20200729.xlsx in sheets \"Mississippi\" and \"Brazos\" extracted to csv format.\u00a0\u00a0
\n* column Plume added with values \"Mississippi\" and \"Brazos.\"\u00a0 Data from both sheets combined into one table.
\n* added a conventional header with dataset name, PI name, version date
\n* modified parameter names to conform with BCO-DMO naming conventions (spaces, +, and - changed to underscores).\u00a0 Units in parentheses removed and added to Parameter Description metadata section.
\n* blank values in this dataset are displayed as \"nd\" for \"no data.\"\u00a0 nd is the default missing data identifier in the BCO-DMO system.
\n* Added column ISO_DateTime_UTC in format yyyy-mm-ddTHH:MMZ using Time_UTC, Month, Day columns with year as 2017.
\n* Latitude and Longitude columns rounded to five decimal places
\n* Clarified parameter descriptions with submitter,\u00a0\u00a0\"Silica\" is\u00a0Si(OH)4 and Salinity :Sal\" are PSU.
\n* Submitter indicated the submitted file had an issue.\u00a0 The Na+ column should not have been divided by 1000 before submission to us.\u00a0 To resolve this, the data was exported from the Excel file without formatting so the full decimal values could be accessed (if exported with formatting Excel had,\u00a0all Na+ values would have been 0.000).\u00a0 After Na+ multiplied by 1000, then the original formatting shown in the excel file was applied to the dataset for all columns.<\/p><\/div>","@type":"rdf:HTML"}],"http:\/\/purl.org\/dc\/terms\/identifier":[{"@value":"821117","@type":"xsd:int"}],"http:\/\/purl.org\/dc\/terms\/title":[{"@value":"CO2 system data"}],"http:\/\/purl.org\/dc\/terms\/date":[{"@value":"2020-08-18T14:03:49-04:00","@type":"xsd:dateTime"}],"http:\/\/purl.org\/dc\/terms\/created":[{"@value":"2020-08-18T14:03:49-04:00","@type":"xsd:dateTime"}],"http:\/\/purl.org\/dc\/terms\/modified":[{"@value":"2023-07-07T16:10:26-04:00","@type":"xsd:dateTime"}],"http:\/\/rdfs.org\/ns\/void#inDataset":[{"@id":"http:\/\/www.bco-dmo.org\/"}],"http:\/\/ocean-data.org\/schema\/namedGraph":[{"@value":"urn:bcodmo:dataset:821117","@type":"xsd:token"}],"http:\/\/ocean-data.org\/schema\/osprey_page":[{"@id":"https:\/\/www.bco-dmo.org\/dataset\/821117"}],"http:\/\/ocean-data.org\/schema\/identifier":[{"@value":"_:Identifier821117"}],"http:\/\/ocean-data.org\/schema\/datasetTitle":[{"@value":"CO2-system and auxiliary data from the Northern Gulf of Mexico from samples collected during R\/V Pelican cruise PE18-09 in September of 2017","@language":"en-US"}],"http:\/\/ocean-data.org\/schema\/abstract":[{"@value":"CO2-system and auxiliary data from the Northern Gulf of Mexico from samples collected during R\/V Pelican cruise PE18-09 in September of 2017.","@language":"en-US"}],"http:\/\/purl.org\/dc\/terms\/rights":[{"@id":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"http:\/\/ocean-data.org\/schema\/deprecated":[{"@value":"false","@type":"xsd:boolean"}],"http:\/\/ocean-data.org\/schema\/temporalExtent":[{"@value":"_:temporalExtent821117"}],"http:\/\/ocean-data.org\/schema\/spatialCoverage":[{"@value":"_:spatialCoverage821117"}],"http:\/\/purl.org\/dc\/terms\/bibliographicCitation":[{"@value":"Wurgaft, E., Wang, Z. 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