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     data   graph     files  public Chemical analysis from sediment core pore water samples collected in the northern Gulf of
Mexico, May 2017
   ?     I   M   background (external link) RSS BCO-DMO bcodmo_dataset_745865

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson
attribute NC_GLOBAL acquisition_description String Sediment cores were collected by divers, sealed in the field with rubber
stoppers and returned to the lab for processing. Pore waters were collected by
inserting rhizon samplers (Seeberg-Elverfeldt et al., 2005) through pre-
drilled holes in the core tubes. Samples were collected in gas-tight glass
syringes and filtered through 0.45 \u00b5m nylon filters into storage vials.
Alkalinity samples were titrated within 12hr of collection; other samples were
returned to the lab for analysis, using techniques routinely used in my lab:
alkalinity and initial pH - Hu and Burdige (2008); sulfate, DIC, ammonium and
DOC - Burdige and Komada (2011), Komada et al. (2016); sulfide - Cline (1969),
Abdulla et al. (in prep.).

Alkalinity and initial pH were determined by Gran Titration using a Metrohm
automatic titrator (model 785 DMP Titrino) combined with a Cole-Parmer pH
electrode, calibrated using pH 4.00, 7.00 and 10.00 NIST-traceable buffers (Hu
and Burdige, 2008).\u00a0 Sulfate was determined by ion chromatography and
conductivity detection with a Thermo-Fisher Dionex ICS-5000 ion chromatograph,
while DOC was determined by high temperature combustion using a Shimadzu TOC-V
total carbon analyzer (Burdige and Komada, 2011; Komada et al. 2016).\u00a0
Ammonium and DIC were determined by FIA analysis using a home-built system
consisting of a Rainin Rabbit peristaltic pump and a Dionex CDM-II
conductivity detector (Hall and Aller, 1992; Lustwerk and Burdige,
1995).\u00a0 Total dissolved sulfide was determined spectrophotometrically
with an Ocean Optics USB400 UV-Vis spectrophotometer (Cline, 1969; Abdulla et
al., in prep.); Total dissolved iron was also determined
spectrophotometrically by the ferrozine method using the same
spectrophotometer\u00a0 (Viollier et al., 2000).

Note:\u00a0\"ns\" stands for \"samples not collected for this analysis\".
attribute NC_GLOBAL awards_0_award_nid String 648650
attribute NC_GLOBAL awards_0_award_number String OCE-1635403
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String Dr David L. Garrison
attribute NC_GLOBAL awards_0_program_manager_nid String 50534
attribute NC_GLOBAL awards_1_award_nid String 710233
attribute NC_GLOBAL awards_1_award_number String OCE-1633951
attribute NC_GLOBAL awards_1_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1633951 (external link)
attribute NC_GLOBAL awards_1_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_1_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_1_funding_source_nid String 355
attribute NC_GLOBAL awards_1_program_manager String Dr Michael E. Sieracki
attribute NC_GLOBAL awards_1_program_manager_nid String 50446
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Pore water analysis
collected June 2017 in the northern Gulf of Mexico
PI: D. Burdige (ODU)
Co-PIs: R. Zimmerman (ODU), M. Long (WHOI)
version date: 2018-09-04
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_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.2d 13 Jun 2019
attribute NC_GLOBAL date_created String 2018-09-11T16:04:12Z
attribute NC_GLOBAL date_modified String 2019-03-20T16:08:15Z
attribute NC_GLOBAL defaultDataQuery String &time
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.745865.1
attribute NC_GLOBAL Easternmost_Easting double -84.456
attribute NC_GLOBAL geospatial_lat_max double 29.907
attribute NC_GLOBAL geospatial_lat_min double 29.853
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -84.456
attribute NC_GLOBAL geospatial_lon_min double -84.552
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/745865 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String TOC analyzer
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Used to measure dissolved organic carbon.
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 748159
attribute NC_GLOBAL instruments_0_description String A unit that accurately determines the carbon concentrations of organic compounds typically by detecting and measuring its combustion product (CO2). See description document at: http://bcodata.whoi.edu/LaurentianGreatLakes_Chemistry/bs116.pdf
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB04/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Total Organic Carbon Analyzer
attribute NC_GLOBAL instruments_0_instrument_nid String 652
attribute NC_GLOBAL instruments_0_supplied_name String Shimadzu TOC-V total carbon analyzer
attribute NC_GLOBAL instruments_1_acronym String Ion Chromatograph
attribute NC_GLOBAL instruments_1_dataset_instrument_description String Used to measure sulfate.
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 748157
attribute NC_GLOBAL instruments_1_description String Ion chromatography is a form of liquid chromatography that measures concentrations of ionic species by separating them based on their interaction with a resin. Ionic species separate differently depending on species type and size. Ion chromatographs are able to measure concentrations of major anions, such as fluoride, chloride, nitrate, nitrite, and sulfate, as well as major cations such as lithium, sodium, ammonium, potassium, calcium, and magnesium in the parts-per-billion (ppb) range. (from http://serc.carleton.edu/microbelife/research_methods/biogeochemical/ic.html)
attribute NC_GLOBAL instruments_1_instrument_name String Ion Chromatograph
attribute NC_GLOBAL instruments_1_instrument_nid String 662
attribute NC_GLOBAL instruments_1_supplied_name String Thermo-Fisher Dionex ICS-5000 ion chromatograph
attribute NC_GLOBAL instruments_2_acronym String Automatic titrator
attribute NC_GLOBAL instruments_2_dataset_instrument_description String Used to measure alkalinity and initial pH.
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 745930
attribute NC_GLOBAL instruments_2_description String Instruments that incrementally add quantified aliquots of a reagent to a sample until the end-point of a chemical reaction is reached.
attribute NC_GLOBAL instruments_2_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB12/ (external link)
attribute NC_GLOBAL instruments_2_instrument_name String Automatic titrator
attribute NC_GLOBAL instruments_2_instrument_nid String 682
attribute NC_GLOBAL instruments_2_supplied_name String Metrohm automatic titrator (model 785 DMP Titrino)
attribute NC_GLOBAL instruments_3_acronym String Spectrophotometer
attribute NC_GLOBAL instruments_3_dataset_instrument_description String Used to measure total dissolved sulfide and total dissolved iron.
attribute NC_GLOBAL instruments_3_dataset_instrument_nid String 748161
attribute NC_GLOBAL instruments_3_description String An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.
attribute NC_GLOBAL instruments_3_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB20/ (external link)
attribute NC_GLOBAL instruments_3_instrument_name String Spectrophotometer
attribute NC_GLOBAL instruments_3_instrument_nid String 707
attribute NC_GLOBAL instruments_3_supplied_name String Ocean Optics USB400 UV-Vis spectrophotometer
attribute NC_GLOBAL instruments_4_acronym String Conductivity Meter
attribute NC_GLOBAL instruments_4_dataset_instrument_description String Used to measure ammonium and dissolved inorganic carbon.
attribute NC_GLOBAL instruments_4_dataset_instrument_nid String 748160
attribute NC_GLOBAL instruments_4_description String Conductivity Meter - An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. Commonly used in hydroponics, aquaculture and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.
attribute NC_GLOBAL instruments_4_instrument_name String Conductivity Meter
attribute NC_GLOBAL instruments_4_instrument_nid String 719
attribute NC_GLOBAL instruments_4_supplied_name String Dionex CDM-II conductivity detector
attribute NC_GLOBAL keywords String alkalinity, Alkalinity_mM, ammonia, ammonium, bco, bco-dmo, biological, carbon, carbon dioxide, chemical, chemistry, co2, commerce, concentration, core, data, dataset, department, depth, Depth_cm, deviation, dic, DIC_mM, dioxide, dissolved, dissolved nutrients, dmo, doc, DOC_uM, earth, Earth Science > Oceans > Ocean Chemistry > Ammonia, erddap, Fe_uM, initial, Initial_pH, latitude, longitude, management, mole, mole_concentration_of_ammonium_in_sea_water, nh4, NH4_uM, nutrients, ocean, oceanography, oceans, office, preliminary, salinity, science, sea, seawater, site, standard, standard deviation, stdev, sulfate, Sulfate_mM, Sulfate_stdev, sulfide, Sulfide_uM, u, water
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/745865 (external link)
attribute NC_GLOBAL Northernmost_Northing double 29.907
attribute NC_GLOBAL param_mapping String {'745865': {'lat': 'master - latitude', 'lon': 'master - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/745865/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Old Dominion University
attribute NC_GLOBAL people_0_affiliation_acronym String ODU
attribute NC_GLOBAL people_0_person_name String Dr David J. Burdige
attribute NC_GLOBAL people_0_person_nid String 648653
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI
attribute NC_GLOBAL people_1_person_name String Dr Matthew Long
attribute NC_GLOBAL people_1_person_nid String 560155
attribute NC_GLOBAL people_1_role String Co-Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String Old Dominion University
attribute NC_GLOBAL people_2_affiliation_acronym String ODU
attribute NC_GLOBAL people_2_person_name String Dr Richard C. Zimmerman
attribute NC_GLOBAL people_2_person_nid String 51308
attribute NC_GLOBAL people_2_role String Co-Principal Investigator
attribute NC_GLOBAL people_2_role_type String originator
attribute NC_GLOBAL people_3_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Nancy Copley
attribute NC_GLOBAL people_3_person_nid String 50396
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String Toward an Improved Understanding of Blue Carbon: The Role of Seagrasses in Sequestering CO2
attribute NC_GLOBAL projects_0_acronym String Seagrass Blue Carbon
attribute NC_GLOBAL projects_0_description String NSF abstract:
This research will develop a quantitative understanding of the factors controlling carbon cycling in seagrass meadows that will improve our ability to quantify their potential as blue carbon sinks and predict their future response to climate change, including sea level rise, ocean warming and ocean acidification. This project will advance a new generation of bio-optical-geochemical models and tools (ECHOES) that have the potential to be transform our ability to measure and predict carbon dynamics in shallow water systems.
This study will utilize cutting-edge methods for evaluating oxygen and carbon exchange (Eulerian and eddy covariance techniques) combined with biomass, sedimentary, and water column measurements to develop and test numerical models that can be scaled up to quantify the dynamics of carbon cycling and sequestration in seagrass meadows in temperate and tropical environments of the West Atlantic continental margin that encompass both siliciclastic and carbonate sediments. The comparative analysis across latitudinal and geochemical gradients will address the relative contributions of different species and geochemical processes to better constrain the role of seagrass carbon sequestration to global biogeochemical cycles. Specifically the research will quantify: (i) the relationship between C stocks and standing biomass for different species with different life histories and structural complexity, (ii) the influence of above- and below-ground metabolism on carbon exchange, and (iii) the influence of sediment type (siliciclastic vs. carbonate) on Blue Carbon storage. Seagrass biomass, growth rates, carbon content and isotope composition (above- and below-ground), organic carbon deposition and export will be measured. Sedimentation rates and isotopic composition of PIC, POC, and iron sulfide precipitates, as well as porewater concentrations of dissolved sulfide, CO2, alkalinity and salinity will be determined in order to develop a bio-optical-geochemical model that will predict the impact of seagrass metabolism on sediment geochemical processes that control carbon cycling in shallow waters. Model predictions will be validated against direct measurements of DIC and O2�exchange in seagrass meadows, enabling us to scale-up the density-dependent processes to predict the impacts of seagrass distribution and density on carbon cycling and sequestration across the submarine landscape.
Status, as of 09 June 2016: This project has been recommended for funding by NSF's Division of Ocean Sciences.
attribute NC_GLOBAL projects_0_end_date String 2019-07
attribute NC_GLOBAL projects_0_geolocation String Chesapeake Bay, Northern Gulf of Mexico, and Bahamas Banks
attribute NC_GLOBAL projects_0_name String Toward an Improved Understanding of Blue Carbon: The Role of Seagrasses in Sequestering CO2
attribute NC_GLOBAL projects_0_project_nid String 648649
attribute NC_GLOBAL projects_0_start_date String 2016-08
attribute NC_GLOBAL publisher_name String Nancy Copley
attribute NC_GLOBAL publisher_role String BCO-DMO Data Manager(s)
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 29.853
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL summary String This dataset includes results of analysis on sediment cores collected from the northern Gulf of Mexico in May 2017 - initial pH, alkalinity, sulfate, DIC, Fe, NH4, sulfide, and DOC.
attribute NC_GLOBAL title String Chemical analysis from sediment core pore water samples collected in the northern Gulf of Mexico, May 2017
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -84.552
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.5-beta
variable site   String  
attribute site description String sample collection site identifier
attribute site ioos_category String Unknown
attribute site long_name String Site
attribute site units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 29.853, 29.907
attribute latitude axis String Y
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String latitude; north is positive
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -84.552, -84.456
attribute longitude axis String X
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String longitude; east is positive
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 Core   byte  
attribute Core _FillValue byte 127
attribute Core actual_range byte 1, 10
attribute Core description String core number
attribute Core ioos_category String Unknown
attribute Core long_name String Core
attribute Core units String unitless
variable Depth_cm   byte  
attribute Depth_cm _FillValue byte 127
attribute Depth_cm actual_range byte 1, 24
attribute Depth_cm colorBarMaximum double 8000.0
attribute Depth_cm colorBarMinimum double -8000.0
attribute Depth_cm colorBarPalette String TopographyDepth
attribute Depth_cm description String depth in the core (relative to the sediment surface)
attribute Depth_cm ioos_category String Location
attribute Depth_cm long_name String Depth
attribute Depth_cm standard_name String depth
attribute Depth_cm units String centimeters
variable Initial_pH   String  
attribute Initial_pH description String initial pH determined during alkalinity titrations
attribute Initial_pH ioos_category String Salinity
attribute Initial_pH long_name String Initial P H
attribute Initial_pH units String NBS scale
variable Alkalinity_mM   String  
attribute Alkalinity_mM description String pore water alkalinity
attribute Alkalinity_mM ioos_category String CO2
attribute Alkalinity_mM long_name String Alkalinity M M
attribute Alkalinity_mM units String milliMoles
variable Sulfate_mM   String  
attribute Sulfate_mM description String pore water sulfate
attribute Sulfate_mM ioos_category String Unknown
attribute Sulfate_mM long_name String Sulfate M M
attribute Sulfate_mM units String milliMoles
variable Sulfate_stdev   String  
attribute Sulfate_stdev description String standard deviation of sulfate concentration
attribute Sulfate_stdev ioos_category String Unknown
attribute Sulfate_stdev long_name String Sulfate Stdev
attribute Sulfate_stdev units String milliMoles
variable DIC_mM   String  
attribute DIC_mM description String pore water dissolved inorganic carbon
attribute DIC_mM ioos_category String Unknown
attribute DIC_mM long_name String DIC M M
attribute DIC_mM units String milliMoles
variable Fe_uM   String  
attribute Fe_uM description String pore water dissolved iron
attribute Fe_uM ioos_category String Unknown
attribute Fe_uM long_name String Fe U M
attribute Fe_uM units String microMoles
variable NH4_uM   String  
attribute NH4_uM colorBarMaximum double 5.0
attribute NH4_uM colorBarMinimum double 0.0
attribute NH4_uM description String pore water dissolved ammonium
attribute NH4_uM ioos_category String Dissolved Nutrients
attribute NH4_uM long_name String Mole Concentration Of Ammonium In Sea Water
attribute NH4_uM units String microMoles
variable Sulfide_uM   String  
attribute Sulfide_uM description String pore water total dissolved sulfide
attribute Sulfide_uM ioos_category String Unknown
attribute Sulfide_uM long_name String Sulfide U M
attribute Sulfide_uM units String microMoles
variable DOC_uM   String  
attribute DOC_uM description String pore water dissolved organic carbon
attribute DOC_uM ioos_category String Unknown
attribute DOC_uM long_name String DOC U M
attribute DOC_uM units String microMoles

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.


 
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