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Dataset Title:  Carbon, nitrogen and their isotope composition of eelgrass from Virginia
Coastal Lagoons and turtlegrass from St George Sound FL
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_746307)
Range: longitude = -84.551506 to -75.73231°E, latitude = 29.85321 to 37.343212°N
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Subset | Data Access Form | Files
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Location {
    String bcodmo_name "site";
    String description "Location of sample collection";
    String long_name "Location";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 29.853211, 37.343211;
    String axis "Y";
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "latitude; north is positive";
    String ioos_category "Location";
    String long_name "Latitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -84.551509, -75.732307;
    String axis "X";
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "longitude; east is postive";
    String ioos_category "Location";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Type_of_Material {
    String bcodmo_name "sample_type";
    String description "type of plant material; leaf or root/rhyzome";
    String long_name "Type Of Material";
    String units "unitless";
  }
  Sample_ID {
    String bcodmo_name "sample";
    String description "sample identifier";
    String long_name "Sample ID";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
  d13C {
    Float32 _FillValue NaN;
    Float32 actual_range -12.63, 91.0;
    String bcodmo_name "d13C";
    String description "the ratio of stable isotopes 13C:12C";
    String long_name "D13 C";
    String units "unitless";
  }
  C_Amount_ug {
    Float32 _FillValue NaN;
    Float32 actual_range 494.68, 3048.4;
    String bcodmo_name "C";
    String description "mass of Carbon in the sample";
    String long_name "C Amount Ug";
    String units "micrograms";
  }
  d13C_Comment {
    String bcodmo_name "comment";
    String description "comments pertaining to delta 13C analysis";
    String long_name "D13 C Comment";
    String units "unitless";
  }
  d15N {
    Float32 _FillValue NaN;
    Float32 actual_range -0.35, 91.0;
    String bcodmo_name "d15N";
    String description "the ratio of stable isotopes 15N:14N";
    String long_name "D15 N";
    String units "unitless";
  }
  N_Amount_ug {
    Float32 _FillValue NaN;
    Float32 actual_range 22.56, 206.62;
    String bcodmo_name "N";
    String description "mass of Nitrogen in the sample";
    String long_name "N Amount Ug";
    String units "micrograms";
  }
  Dry_Mass_mg {
    Float32 _FillValue NaN;
    Float32 actual_range 2.431, 6.062;
    String bcodmo_name "mass_dry";
    String description "dry mass of sample";
    String long_name "Dry Mass Mg";
    String units "milligrams";
  }
  pcnt_C_g_per_gDW {
    Float32 _FillValue NaN;
    Float32 actual_range 0.29, 91.0;
    String bcodmo_name "C";
    String description "percent Carbon in sample dry weight";
    String long_name "Pcnt C G Per G DW";
    String units "unitless (grams/grams)";
  }
  pcnt_N_g_per_gDW {
    Float32 _FillValue NaN;
    Float32 actual_range 0.03, 91.0;
    String bcodmo_name "N";
    String description "percent Nitrogen in sample dry weight";
    String long_name "Pcnt N G Per G DW";
    String units "unitless (grams/grams)";
  }
  C_to_N {
    Float32 _FillValue NaN;
    Float32 actual_range 0.18, 91.0;
    String bcodmo_name "C_to_N";
    String description "Carbon to Nitrogen ratio";
    String long_name "C To N";
    String units "unitless (mol/mol)";
  }
  d15N_Comment {
    String bcodmo_name "comment";
    String description "comments pertaining to delta 15N analysis";
    String long_name "D15 N Comment";
    String units "unitless";
  }
  Tray_Name {
    String bcodmo_name "sample";
    String description "sample tray identifier";
    String long_name "Tray Name";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
  Well_Id {
    String bcodmo_name "sample";
    String description "well identifier";
    String long_name "Well Id";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
  Analysis {
    String bcodmo_name "unknown";
    String description "type of analyses performed on sample";
    String long_name "Analysis";
    String units "unitless";
  }
  OurLabID {
    Int32 _FillValue 2147483647;
    Int32 actual_range 1390604, 1390993;
    String bcodmo_name "sample";
    String description "intermal sample identifier assigned by researcher's laborator";
    String long_name "Our Lab ID";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
  Analysis_Number {
    Int32 _FillValue 2147483647;
    Int32 actual_range 446071, 447512;
    String bcodmo_name "sample";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String description "sample identifier assigned by Stable Isotope Facility";
    String long_name "Analysis Number";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson";
    String acquisition_description 
"Seagrass samples were collected randomly from each site by hand using 6\\\"
diameter PVC cores pounded into the sediment. Intact plants, including roots
and rhizomes, were separated from the sediment and organic debris. The green
shoots were separated from roots & rhizomes, rinsed in fresh water and dried
separately at -60\\u00b0 C. Dried samples were ground in a mortar and pestle
using liquid nitrogen and re-dried. The dry powder was analyzed for percent
Carbon, percent Nitrogen, delta-13C, and delta-15N by the Stable Isotope
Facility, U.C. Davis.
 
Samples were collected by hand, using hand tools.\\u00a0 Chemical and isotope
analyses were performed by the Stable Isotope Facility, UC Davis using a PDZ
Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope
ratio mass spectrometer (Sercon Ltd., Cheshire, UK).
 
Data were segregated by location, tissue type,\\u00a0and species.\\u00a0 Means
and errors were calculated from 10 to 90 replicate samples (separate plants).";
    String awards_0_award_nid "648650";
    String awards_0_award_number "OCE-1635403";
    String awards_0_funder_name "NSF Division of Ocean Sciences";
    String awards_0_funding_acronym "NSF OCE";
    String awards_0_funding_source_nid "355";
    String awards_0_program_manager "David L. Garrison";
    String awards_0_program_manager_nid "50534";
    String awards_1_award_nid "710233";
    String awards_1_award_number "OCE-1633951";
    String awards_1_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1633951";
    String awards_1_funder_name "NSF Division of Ocean Sciences";
    String awards_1_funding_acronym "NSF OCE";
    String awards_1_funding_source_nid "355";
    String awards_1_program_manager "Michael E. Sieracki";
    String awards_1_program_manager_nid "50446";
    String cdm_data_type "Other";
    String comment 
"Seagrass C, N & isotope composition 
   Eelgrass from Virginia Coastal Lagoons and turtlegrass from St George Sound FL 
   PI: R. Zimmerman (ODU) 
   version: 2018-10-10";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.3  19 Dec 2019";
    String date_created "2018-09-17T18:55:46Z";
    String date_modified "2019-03-20T14:14:13Z";
    String defaultDataQuery "&time<now";
    String doi "10.1575/1912/bco-dmo.746307.1";
    Float64 Easternmost_Easting -75.732307;
    Float64 geospatial_lat_max 37.343211;
    Float64 geospatial_lat_min 29.853211;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -75.732307;
    Float64 geospatial_lon_min -84.551509;
    String geospatial_lon_units "degrees_east";
    String history 
"2021-10-24T07:10:35Z (local files)
2021-10-24T07:10:35Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_746307.das";
    String infoUrl "https://www.bco-dmo.org/dataset/746307";
    String institution "BCO-DMO";
    String instruments_0_acronym "IR Mass Spec";
    String instruments_0_dataset_instrument_description "Used for chemical and isotope analyses.";
    String instruments_0_dataset_instrument_nid "746322";
    String instruments_0_description "The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB16/";
    String instruments_0_instrument_name "Isotope-ratio Mass Spectrometer";
    String instruments_0_instrument_nid "469";
    String instruments_0_supplied_name "PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK)";
    String instruments_1_dataset_instrument_description "Used for chemical and isotope analyses.";
    String instruments_1_dataset_instrument_nid "746323";
    String instruments_1_description "Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.";
    String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB01/";
    String instruments_1_instrument_name "Elemental Analyzer";
    String instruments_1_instrument_nid "546339";
    String instruments_1_supplied_name "PDZ Europa ANCA-GSL elemental analyzer";
    String keywords "amount, analysis, Analysis_Number, bco, bco-dmo, biological, C_Amount_ug, C_to_N, chemical, comment, d13, d13C, d13C_Comment, d15, d15N, d15N_Comment, data, dataset, dmo, dry, Dry_Mass_mg, erddap, lab, latitude, Location, longitude, management, mass, material, N_Amount_ug, name, number, oceanography, office, our, OurLabID, pcnt, pcnt_C_g_per_gDW, pcnt_N_g_per_gDW, per, preliminary, sample, Sample_ID, tray, Tray_Name, type, Type_of_Material, well, Well_Id";
    String license "https://www.bco-dmo.org/dataset/746307/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/746307";
    Float64 Northernmost_Northing 37.343211;
    String param_mapping "{'746307': {'lat': 'master - latitude', 'lon': 'master - longitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/746307/parameters";
    String people_0_affiliation "Old Dominion University";
    String people_0_affiliation_acronym "ODU";
    String people_0_person_name "Richard C. Zimmerman";
    String people_0_person_nid "51308";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Old Dominion University";
    String people_1_affiliation_acronym "ODU";
    String people_1_person_name "David J Burdige";
    String people_1_person_nid "648653";
    String people_1_role "Co-Principal Investigator";
    String people_1_role_type "originator";
    String people_2_affiliation "Woods Hole Oceanographic Institution";
    String people_2_affiliation_acronym "WHOI BCO-DMO";
    String people_2_person_name "Nancy Copley";
    String people_2_person_nid "50396";
    String people_2_role "BCO-DMO Data Manager";
    String people_2_role_type "related";
    String project "Seagrass Blue Carbon";
    String projects_0_acronym "Seagrass Blue Carbon";
    String projects_0_description 
"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.";
    String projects_0_end_date "2019-07";
    String projects_0_geolocation "Chesapeake Bay, Northern Gulf of Mexico, and Bahamas Banks";
    String projects_0_name "Toward an Improved Understanding of Blue Carbon: The Role of Seagrasses in Sequestering CO2";
    String projects_0_project_nid "648649";
    String projects_0_start_date "2016-08";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 29.853211;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "Analysis";
    String summary "This dataset includes results of carbon and nitrogen analyses on seagrasses collected in the Virginia Coastal Lagoons and from St. George Sound FL in May, 2017.";
    String title "Carbon, nitrogen and their isotope composition of eelgrass from Virginia Coastal Lagoons and turtlegrass from St George Sound FL";
    String version "1";
    Float64 Westernmost_Easting -84.551509;
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.


 
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