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Dataset Title:  Cellular elemental content of individual phytoplankton cells collected during
US GEOTRACES North Atlantic Transect cruises in the Subtropical western and
eastern North Atlantic Ocean during Oct and Nov, 2010 and Nov. 2011
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_549122)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Subset | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
   or a List of Values ?
   Maximum ?
 
 cruise_id (unitless) ?              
 project (unitless) ?      
   - +  ?
 station_GEOTRC (unitless) ?          1    20
 sta_PI (unitless) ?          1    153
 latitude (degrees_north) ?          17.3505    39.68403
  < slider >
 longitude (degrees_east) ?          -69.8139    -18.2545
  < slider >
 cast_GEOTRC (unitless) ?          1    9
 event_GEOTRC (unitless) ?          2084    3222
 depth (m) ?          28.0    106.2
  < slider >
 depth_GEOTRC_CTD_round (meters) ?          28    106
 sample_GEOTRC (unitless) ?          5331    7704
 sample_bottle_GEOTRC (unitless) ?          18    24
 bottle_GEOTRC (unitless) ?              
 grid_type (unitless) ?              
 grid_num (unitless) ?              
 SXRF_run (unitless) ?              
 mda_id (unitless) ?              
 cell_type (unitless) ?              
 cell_vol (um^3) ?          1.33    1980.45
 cell_C (mol/cell) ?          2.35E-14    1.35E-11
 cell_Si (mol/cell) ?          0.0    1.61E-12
 cell_P (mol/cell) ?          1.1E-17    3.31E-13
 cell_S (mol/cell) ?          1.39E-16    1.11E-13
 cell_Mn (mol/cell) ?          3.66E-21    9.54E-16
 cell_Fe (mol/cell) ?          3.37E-19    2.92E-15
 cell_Co (mol/cell) ?          3.27E-21    7.220000000000001E-17
 cell_Ni (mol/cell) ?          4.17E-21    2.9E-15
 cell_Cu (mol/cell) ?          2.28E-19    4.0900000000000006E-15
 cell_Zn (mol/cell) ?          4.4400000000000004E-21    5.4E-15
 light_image_filename (unitless) ?              
 chl_image_filename (unitless) ?              
 SXRF_map_filename (unitless) ?              
 SXRF_spectrum_filename (unitless) ?              
 time (BTL ISO Date Time UTC, UTC) ?          2010-10-21T17:08:00Z    
  < slider >
 
Server-side Functions ?
 distinct() ?
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  cruise_id {
    String description "cruise identification";
    String ioos_category "Identifier";
    String long_name "Cruise Id";
    String units "unitless";
  }
  project {
    String description "GEOTRACES project: North Atlantic Zonal Transect";
    String ioos_category "Identifier";
    String long_name "Project";
    String units "unitless";
  }
  station_GEOTRC {
    Byte _FillValue 127;
    Byte actual_range 1, 20;
    String description "GEOTRACES station number; ranges from 1 through 12 for KN199-04 and 1 through 24 for KN204-01. Stations 7 and 9 were skipped on KN204-01. Some GeoFish stations are denoted as X_to_Y indicating the tow occurred between stations X and Y. Values were added from the intermediate US GEOTRACES master file (see Processing Description).";
    String ioos_category "Unknown";
    String long_name "Station GEOTRC";
    String units "unitless";
  }
  sta_PI {
    Int16 _FillValue 32767;
    Int16 actual_range 1, 153;
    String description "station number given by PI";
    String ioos_category "Identifier";
    String long_name "Sta PI";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 17.3505, 39.68403;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "station latitude; north is positive";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -69.8139, -18.2545;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "station longitude; east is postive";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  cast_GEOTRC {
    Byte _FillValue 127;
    Byte actual_range 1, 9;
    String description "Cast identifier; numbered consecutively within a station. Values were added from the intermediate US GEOTRACES master file (see Processing Description).";
    String ioos_category "Unknown";
    String long_name "Cast GEOTRC";
    String units "unitless";
  }
  event_GEOTRC {
    Int16 _FillValue 32767;
    Int16 actual_range 2084, 3222;
    String description "Unique identifying number for US GEOTRACES sampling events; ranges from 2001 to 2225 for KN199-04 events and from 3001 to 3282 for KN204-01 events. Values were added from the intermediate US GEOTRACES master file (see Processing Description).";
    String ioos_category "Unknown";
    String long_name "Event GEOTRC";
    String units "unitless";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 _FillValue NaN;
    Float64 actual_range 28.0, 106.2;
    String axis "Z";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String description "Observation/sample depth in meters; calculated from CTD pressure. Values were added from the intermediate US GEOTRACES master file (see Processing Description).";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  depth_GEOTRC_CTD_round {
    Byte _FillValue 127;
    Byte actual_range 28, 106;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String description "Rounded observation/sample depth in meters; calculated from CTD pressure. Values were added from the intermediate US GEOTRACES master file (see Processing Description).";
    String ioos_category "Location";
    String long_name "Depth";
    String standard_name "depth";
    String units "meters";
  }
  sample_GEOTRC {
    Int16 _FillValue 32767;
    Int16 actual_range 5331, 7704;
    String description "Unique identifying number for US GEOTRACES samples; ranges from 5033 to 6078 for KN199-04 and from 6112 to 8148 for KN204-01. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'GEOTRACES #'; this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.";
    String ioos_category "Unknown";
    String long_name "Sample GEOTRC";
    String units "unitless";
  }
  sample_bottle_GEOTRC {
    Byte _FillValue 127;
    Byte actual_range 18, 24;
    String description "Unique identification numbers given to samples taken from bottles; ranges from 1 to 24; often used synonymously with bottle number. Values were added from the intermediate US GEOTRACES master file (see Processing Description).";
    String ioos_category "Unknown";
    String long_name "Sample Bottle GEOTRC";
    String units "unitless";
  }
  bottle_GEOTRC {
    String description "Alphanumeric characters identifying bottle type (e.g. NIS representing Niskin and GF representing GOFLO) and position on a CTD rosette. Values were added from the intermediate US GEOTRACES master file (see Processing Description).";
    String ioos_category "Unknown";
    String long_name "Bottle GEOTRC";
    String units "unitless";
  }
  grid_type {
    String description "grid type: plankton samples were mounted onto either gold (Au) or aluminum (Al) electron microscopy grids";
    String ioos_category "Unknown";
    String long_name "Grid Type";
    String units "unitless";
  }
  grid_num {
    String description "GEOTRACES bottle number followed by an internal designation for the grid";
    String ioos_category "Unknown";
    String long_name "Grid Num";
    String units "unitless";
  }
  SXRF_run {
    String description "samples were analyzed by synchrotron x-ray fluorescence (SXRF) during two analytical runs in July 2011 (2011r2) or August 2012 (2012r2).";
    String ioos_category "Unknown";
    String long_name "SXRF Run";
    String units "unitless";
  }
  mda_id {
    String description "unique identifier given to each SXRF scan during each run";
    String ioos_category "Identifier";
    String long_name "Mda Id";
    String units "unitless";
  }
  cell_type {
    String description "each cell was classified as either an autotrophic flagellate (Aflag); autotrophic picoplankter (Apico); or a diatom.";
    String ioos_category "Unknown";
    String long_name "Cell Type";
    String units "unitless";
  }
  cell_vol {
    Float32 _FillValue NaN;
    Float32 actual_range 1.33, 1980.45;
    String description "biovolume of each cell estimated from microscope measurements of cell dimensions";
    String ioos_category "Unknown";
    String long_name "Cell Vol";
    String units "um^3";
  }
  cell_C {
    Float32 _FillValue NaN;
    Float32 actual_range 2.35e-14, 1.35e-11;
    String description "cellular C content  calculated from biovolume using the relationships of Menden-Deuer & Lessard (2000)";
    String ioos_category "Unknown";
    String long_name "Cell C";
    String units "mol/cell";
  }
  cell_Si {
    Float64 _FillValue NaN;
    Float64 actual_range 0.0, 1.61e-12;
    String description "total elemental Si content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Dissolved Nutrients";
    String long_name "Mass Concentration Of Silicate In Sea Water";
    String units "mol/cell";
  }
  cell_P {
    Float64 _FillValue NaN;
    Float64 actual_range 1.1e-17, 3.31e-13;
    String description "total elemental P content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Unknown";
    String long_name "Cell P";
    String units "mol/cell";
  }
  cell_S {
    Float32 _FillValue NaN;
    Float32 actual_range 1.39e-16, 1.11e-13;
    String description "total elemental S content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Unknown";
    String long_name "Cell S";
    String units "mol/cell";
  }
  cell_Mn {
    Float64 _FillValue NaN;
    Float64 actual_range 3.66e-21, 9.54e-16;
    String description "total elemental Mn content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Unknown";
    String long_name "Cell Mn";
    String units "mol/cell";
  }
  cell_Fe {
    Float64 _FillValue NaN;
    Float64 actual_range 3.37e-19, 2.92e-15;
    String description "total elemental Fe content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Unknown";
    String long_name "Cell Fe";
    String units "mol/cell";
  }
  cell_Co {
    Float64 _FillValue NaN;
    Float64 actual_range 3.27e-21, 7.22e-17;
    String description "total elemental Co content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Unknown";
    String long_name "Cell Co";
    String units "mol/cell";
  }
  cell_Ni {
    Float64 _FillValue NaN;
    Float64 actual_range 4.17e-21, 2.9e-15;
    String description "total elemental Ni content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Unknown";
    String long_name "Cell Ni";
    String units "mol/cell";
  }
  cell_Cu {
    Float64 _FillValue NaN;
    Float64 actual_range 2.28e-19, 4.09e-15;
    String description "total elemental Cu content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Unknown";
    String long_name "Cell Cu";
    String units "mol/cell";
  }
  cell_Zn {
    Float64 _FillValue NaN;
    Float64 actual_range 4.44e-21, 5.4e-15;
    String description "total elemental Zn content of each cell was measured with SXRF.  Details provided in Twining et al. (2015).";
    String ioos_category "Unknown";
    String long_name "Cell Zn";
    String units "mol/cell";
  }
  light_image_filename {
    String description "light image filename";
    String fileAccessBaseUrl "http://data.bco-dmo.org/GEOTRACES/Twining/Light_image/";
    String ioos_category "Unknown";
    String long_name "Light Image Filename";
    String units "unitless";
  }
  chl_image_filename {
    String description "Chl image filename";
    String fileAccessBaseUrl "http://data.bco-dmo.org/GEOTRACES/Twining/Chl_image/";
    String ioos_category "Unknown";
    String long_name "Chl Image Filename";
    String units "unitless";
  }
  SXRF_map_filename {
    String description "SXRF map filename";
    String fileAccessBaseUrl "http://data.bco-dmo.org/GEOTRACES/Twining/SXRF_map/";
    String ioos_category "Unknown";
    String long_name "SXRF Map Filename";
    String units "unitless";
  }
  SXRF_spectrum_filename {
    String description "SXRF spectrum filename";
    String fileAccessBaseUrl "http://data.bco-dmo.org/GEOTRACES/Twining/SXRF_spectra/";
    String ioos_category "Unknown";
    String long_name "SXRF Spectrum Filename";
    String units "unitless";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.28768088e+9, NaN;
    String axis "T";
    String description "Date and time (UTC) variable recorded at the bottle sampling time in ISO compliant format. Values were added from the intermediate US GEOTRACES master file (see Processing Description). This standard is based on ISO 8601:2004(E) and takes on the following form: 2009-08-30T14:05:00[.xx]Z (UTC time)";
    String ioos_category "Time";
    String long_name "BTL ISO Date Time UTC";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
    String acquisition_description 
"SXRF samples were prepared from unfiltered water taken from GEOTRACES GO-Flo
bottles at the shallowest depth and deep chlorophyll maximum. Cells were
preserved with 0.25% trace-metal clean buffered glutaraldehyde and centrifuged
onto C/formvar-coated Au TEM grids. Grids were briefly rinsed with a drop of
ultrapure water and dried in a Class-100 cabinet. SXRF analysis was performed
using the 2-ID-E beamline at the Advanced Photon source (Argonne National
Laboratory) following the protocols of Twining et al. (2011).";
    String awards_0_award_nid "55138";
    String awards_0_award_number "OCE-0928289";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward?AWD_ID=0928289&HistoricalAwards=false";
    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 "Dr Donald  L. Rice";
    String awards_0_program_manager_nid "51467";
    String cdm_data_type "Other";
    String comment 
"Please note that data may not be final, pending intercalibration results and 
 further analysis. If you are interested in following changes to US GEOTRACES 
 NAT data, there is an RSS feed available via the BCO-DMO US GEOTRACES  
 <a href=\"https://www.bco-dmo.org/project/2066\" target=\"_blank\">project page</a>. 
  
   GT10-11 - cellular element quotas 
   B. Twining (Bigelow) 
   version 2 (2015-02-17):  revised station 9 depths: sample 5636 from 50m to 28m and 5638 from 28m to 50m. 
                            replaces version 2015-02-10. 
   Sorted by cruise, station, grid#";
    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 2.2d  13 Jun 2019";
    String date_created "2015-02-04T20:45:08Z";
    String date_modified "2016-06-14T18:13:05Z";
    String defaultDataQuery "&time";
    String doi "10.1575/1912/bco-dmo.641155";
    Float64 Easternmost_Easting -18.2545;
    Float64 geospatial_lat_max 39.68403;
    Float64 geospatial_lat_min 17.3505;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -18.2545;
    Float64 geospatial_lon_min -69.8139;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 106.2;
    Float64 geospatial_vertical_min 28.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2019-08-19T03:25:29Z (local files)
2019-08-19T03:25:29Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_549122.html";
    String infoUrl "https://www.bco-dmo.org/dataset/549122";
    String institution "BCO-DMO";
    String instruments_0_acronym "GO-FLO";
    String instruments_0_dataset_instrument_nid "643392";
    String instruments_0_description "GO-FLO bottle cast used to collect water samples for pigment, nutrient, plankton, etc. The GO-FLO sampling bottle is specially designed to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/30/";
    String instruments_0_instrument_name "GO-FLO Bottle";
    String instruments_0_instrument_nid "411";
    String instruments_1_acronym "GeoFish";
    String instruments_1_dataset_instrument_nid "643393";
    String instruments_1_description "The GeoFish towed sampler is a custom designed near surface (";
    String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/31/";
    String instruments_1_instrument_name "GeoFish Towed near-Surface Sampler";
    String instruments_1_instrument_nid "549";
    String instruments_2_dataset_instrument_nid "643394";
    String instruments_2_description "Instruments that generate enlarged images of samples using the phenomena of reflection and absorption of visible light. Includes conventional and inverted instruments. Also called a \"light microscope\".";
    String instruments_2_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB05/";
    String instruments_2_instrument_name "Microscope-Optical";
    String instruments_2_instrument_nid "708";
    String instruments_3_acronym "XRF analyzer";
    String instruments_3_dataset_instrument_description "SXRF analysis was performed on the 2-ID-E beamline at the Advanced Photon source (Argonne National Laboratory). The synchetron consists of a storage ring which produces high energy electromagnetic radiation. X-rays diverted to the 2-ID-E beamline are used for x-ray fluorescence mapping of biological samples. X-rays were tuned to an energy of 10 keV to enable the excition of K-alpha fluorescence for the elements reported. The beam is focused using Fresnel zoneplates to achieve high spatial resolution; for our application a focused spot size of 0.5um was used. A single element germanium energy dispersive detector is used to record the X-ray fluorescence spectrum.";
    String instruments_3_dataset_instrument_nid "648912";
    String instruments_3_description "Instruments that identify and quantify the elemental constituents of a sample from the spectrum of electromagnetic radiation emitted by the atoms in the sample when excited by X-ray radiation.";
    String instruments_3_instrument_name "X-ray fluorescence analyzer";
    String instruments_3_instrument_nid "648910";
    String keywords "bco, bco-dmo, biological, bottle, bottle_GEOTRC, btl, BTL_ISO_DateTime_UTC, cast, cast_GEOTRC, cell, cell_C, cell_Co, cell_Cu, cell_Fe, cell_Mn, cell_Ni, cell_P, cell_S, cell_Si, cell_type, cell_vol, cell_Zn, chemical, chemistry, chl, chl_image_filename, chlorophyll, concentration, cruise, cruise_id, data, dataset, date, depth, depth_GEOTRC_CTD, depth_GEOTRC_CTD_round, dissolved, dissolved nutrients, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Silicate, erddap, event, event_GEOTRC, filename, geotrc, grid, grid_num, grid_type, identifier, image, iso, latitude, light, light_image_filename, longitude, management, map, mass, mass_concentration_of_silicate_in_sea_water, mda, mda_id, num, nutrients, ocean, oceanography, oceans, office, preliminary, project, run, sample, sample_bottle_GEOTRC, sample_GEOTRC, science, sea, seawater, silicate, spectrum, sta, sta_PI, station, station_GEOTRC, sxrf, SXRF_map_filename, SXRF_run, SXRF_spectrum_filename, time, type, vol, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"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.";
    String metadata_source "https://www.bco-dmo.org/api/dataset/549122";
    Float64 Northernmost_Northing 39.68403;
    String param_mapping "{'549122': {'depth_GEOTRC_CTD': 'flag - depth', 'lat': 'master - latitude', 'BTL_ISO_DateTime_UTC': 'master - time', 'lon': 'master - longitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/549122/parameters";
    String people_0_affiliation "Bigelow Laboratory for Ocean Sciences";
    String people_0_person_name "Benjamin Twining";
    String people_0_person_nid "51087";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Woods Hole Oceanographic Institution";
    String people_1_affiliation_acronym "WHOI BCO-DMO";
    String people_1_person_name "Nancy Copley";
    String people_1_person_nid "50396";
    String people_1_role "BCO-DMO Data Manager";
    String people_1_role_type "related";
    String project "U.S. GEOTRACES North Atlantic Transect";
    String projects_0_acronym "U.S. GEOTRACES NAT";
    String projects_0_description 
"Much of this text appeared in an article published in OCB News, October 2008, by the OCB Project Office.
The first U.S. GEOTRACES Atlantic Section will be specifically centered around a sampling cruise to be carried out in the North Atlantic in 2010. Ed Boyle (MIT) and Bill Jenkins (WHOI) organized a three-day planning workshop that was held September 22-24, 2008 at the Woods Hole Oceanographic Institution. The main goal of the workshop, sponsored by the National Science Foundation and the U.S. GEOTRACES Scientific Steering Committee, was to design the implementation plan for the first U.S. GEOTRACES Atlantic Section. The primary cruise design motivation was to improve knowledge of the sources, sinks and internal cycling of Trace Elements and their Isotopes (TEIs) by studying their distributions along a section in the North Atlantic (Figure 1). The North Atlantic has the full suite of processes that affect TEIs, including strong meridional advection, boundary scavenging and source effects, aeolian deposition, and the salty Mediterranean Outflow. The North Atlantic is particularly important as it lies at the \"origin\" of the global Meridional Overturning Circulation.
It is well understood that many trace metals play important roles in biogeochemical processes and the carbon cycle, yet very little is known about their large-scale distributions and the regional scale processes that affect them. Recent advances in sampling and analytical techniques, along with advances in our understanding of their roles in enzymatic and catalytic processes in the open ocean provide a natural opportunity to make substantial advances in our understanding of these important elements. Moreover, we are motivated by the prospect of global change and the need to understand the present and future workings of the ocean's biogeochemistry. The GEOTRACES strategy is to measure a broad suite of TEIs to constrain the critical biogeochemical processes that influence their distributions. In addition to these \"exotic\" substances, more traditional properties, including macronutrients (at micromolar and nanomolar levels), CTD, bio-optical parameters, and carbon system characteristics will be measured. The cruise starts at Line W, a repeat hydrographic section southeast of Cape Cod, extends to Bermuda and subsequently through the North Atlantic oligotrophic subtropical gyre, then transects into the African coast in the northern limb of the coastal upwelling region. From there, the cruise goes northward into the Mediterranean outflow. The station locations shown on the map are for the \"fulldepth TEI\" stations, and constitute approximately half of the stations to be ultimately occupied.
Figure 1. The proposed 2010 Atlantic GEOTRACES cruise track plotted on dissolved oxygen at 400 m depth. Data from the World Ocean Atlas (Levitus et al., 2005) were plotted using Ocean Data View (courtesy Reiner Schlitzer). [click on the image to view a larger version]
Hydrography, CTD and nutrient measurements will be supported by the Ocean Data Facility (J. Swift) at Scripps Institution of Oceanography and funded through NSF Facilities. They will be providing an additional CTD rosette system along with nephelometer and LADCP. A trace metal clean Go-Flo Rosette and winch will be provided by the group at Old Dominion University (G. Cutter) along with a towed underway pumping system.
The North Atlantic Transect cruise began in 2010 with KN199 leg 4 (station sampling) and leg 5 (underway sampling only) (Figure 2).
KN199-04 Cruise Report (PDF)
Figure 2. The red line shows the cruise track for the first leg of the US Geotraces North Atlantic Transect on the R/V Knorr in October 2010.� The rest of the stations (beginning with 13) will be completed in October-December 2011 on the R/V Knorr (courtesy of Bill Jenkins, Chief Scientist, GNAT first leg). [click on the image to view a larger version]
The section completion effort resumed again in November 2011 with KN204-01A,B (Figure 3).
KN204-01A,B Cruise Report (PDF)
Figure 3. Station locations occupied on the US Geotraces North Atlantic Transect on the R/V Knorr in November 2011.� [click on the image to view a larger version]
Data from the North Atlantic Transect cruises are available under the Datasets heading below, and consensus values for the SAFe and North Atlantic GEOTRACES Reference Seawater Samples are available from the GEOTRACES Program Office: Standards and Reference Materials
ADCP data are available from the Currents ADCP group at the University of Hawaii at the links below:KN199-04�� (leg 1 of 2010 cruise; Lisbon to Cape Verde)KN199-05�� (leg 2 of 2010 cruise; Cape Verde to Charleston, NC)KN204-01A (part 1 of 2011 cruise; Woods Hole, MA to Bermuda)KN204-01B (part 2 of 2011 cruise; Bermuda to Cape Verde)";
    String projects_0_end_date "2013-08";
    String projects_0_geolocation "Subtropical western and eastern North Atlantic Ocean";
    String projects_0_name "U.S. GEOTRACES North Atlantic Transect";
    String projects_0_project_nid "2066";
    String projects_0_project_website "http://www.geotraces.org/";
    String projects_0_start_date "2010-10";
    String publisher_name "Nancy Copley";
    String publisher_role "BCO-DMO Data Manager(s)";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 17.3505;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String subsetVariables "project";
    String summary 
"Individual phytoplankton cells were collected on the GEOTRACES North Atlantic
Transect cruises were analyzed for elemental content using SXRF (Synchrotron
radiation X-Ray Fluorescence). Carbon was calculated from biovolume using the
relationships of Menden-Deuer & Lessard (2000). Trace metal concentrations are
reported.
 
Download zipped images:  
[Chlorophyll](\\\\http://data.bco-dmo.org/GEOTRACES/Twining/Chl_image.zip\\\\)  
[Light](\\\\http://data.bco-dmo.org/GEOTRACES/Twining/Light_image.zip\\\\)  
[SXRF maps](\\\\http://data.bco-dmo.org/GEOTRACES/Twining/SXRF_map.zip\\\\)  
[SXRF spectra](\\\\http://data.bco-
dmo.org/GEOTRACES/Twining/SXRF_spectra.zip\\\\)
 
Related references:
 
Menden-Deuer, S. and E. J. Lessard (2000). Carbon to volume relationships for
dinoflagellates, diatoms, and other protist plankton. Limnology and
Oceanography 45(3): 569-579.
 
* Twining, B. S., S. Rauschenberg, P. L. Morton, and S. Vogt. 2015. Metal contents of phytoplankton and labile particulate material in the North Atlantic Ocean. Progress in Oceanography 137: 261-283.)";
    String time_coverage_start "2010-10-21T17:08:00Z";
    String title "Cellular elemental content of individual phytoplankton cells collected during US GEOTRACES North Atlantic Transect cruises in the Subtropical western and eastern North Atlantic Ocean during Oct and Nov, 2010 and Nov. 2011";
    String version "1";
    Float64 Westernmost_Easting -69.8139;
    String xml_source "osprey2erddap.update_xml() v1.5-beta";
  }
}

 

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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