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Dataset Title:  Inorganic and organic nutrient data from Niskin bottles from R/V Knorr cruise
KN210-04 in the Western Atlantic Ocean between Uruguay and Barbados in
2013 (Deep Atlantic DOM project)
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_473296)
Range: longitude = -55.299423 to -24.00075°E, latitude = -38.0026 to 9.700333°N, depth = 5.234 to 5532.903m
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
 
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Things You Can Do With Your Graphs

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  cast {
    Byte _FillValue 127;
    Byte actual_range 2, 74;
    String bcodmo_name "cast";
    String description "Consecutive cast number for the instrument.";
    String long_name "Cast";
    String units "dimensionless";
  }
  station {
    Byte _FillValue 127;
    Byte actual_range 2, 23;
    String bcodmo_name "station";
    String description "Identification number of the sampling station.";
    String long_name "Station";
    String units "dimensionless";
  }
  date_start_utc {
    Int32 _FillValue 2147483647;
    Int32 actual_range 20130327, 20130506;
    String bcodmo_name "date_utc";
    String description "Date (UTC) given as 4-digit year -- 2-digit month -- 2-digit day in YYYYmmdd format.";
    String long_name "Date Start Utc";
    String units "unitless";
  }
  time_start_utc {
    Int16 _FillValue 32767;
    Int16 actual_range 334, 2317;
    String bcodmo_name "time_utc";
    String description "Time (UTC) given as hour -- minute.";
    String long_name "Time Start Utc";
    String units "HHMM";
  }
  event_start {
    String bcodmo_name "event";
    String description "The event number from the ELOG maintained during the cruise.";
    String long_name "Event Start";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/";
    String units "dimensionless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range -38.0026, 9.700333;
    String axis "Y";
    String bcodmo_name "lat_start";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Latitude at the time the event started (from the cruise event log).";
    String ioos_category "Location";
    String long_name "Latitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
    String source_name "lat_start";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -55.299424, -24.000749;
    String axis "X";
    String bcodmo_name "lon_start";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Longitude at the time the event started (from the cruise event log).";
    String ioos_category "Location";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String source_name "lon_start";
    String standard_name "longitude";
    String units "degrees_east";
  }
  niskin {
    Byte _FillValue 127;
    Byte actual_range 1, 24;
    String bcodmo_name "bot_Nis";
    String description "Niskin bottle number.";
    String long_name "Niskin";
    String units "dimensionless";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 _FillValue NaN;
    Float64 actual_range 5.234, 5532.903;
    String axis "Z";
    String bcodmo_name "depth";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String description "Depth.";
    String ioos_category "Location";
    String long_name "Depth";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/DEPH/";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  press {
    Float32 _FillValue NaN;
    Float32 actual_range 5.263, 5638.131;
    String bcodmo_name "pressure";
    String description "Pressure.";
    String long_name "Press";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PRESPR01/";
    String units "decibars (db)";
  }
  bots {
    Byte _FillValue 127;
    Byte actual_range 1, 24;
    String bcodmo_name "bots";
    String description "The full range of Niskin bottles used for the sample collection. For this particular dataset this is equal to the Niskin number.";
    String long_name "Bots";
    String units "dimensionless";
  }
  PO4 {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0495, 2.4334;
    String bcodmo_name "PO4";
    String description "Phosphate.";
    String long_name "Mass Concentration Of Phosphate In Sea Water";
    String units "micromoles per liter (umol/L)";
  }
  NO3_NO2 {
    Float32 _FillValue NaN;
    Float32 actual_range -0.0329, 35.7392;
    String bcodmo_name "NO3_NO2";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "Nitrate + nitrite.";
    String long_name "Mole Concentration Of Nitrate In Sea Water";
    String units "micromoles per liter (umol/L)";
  }
  silicate {
    Float32 _FillValue NaN;
    Float32 actual_range 0.448, 132.2151;
    String bcodmo_name "SiO4";
    String description "Silicate.";
    String long_name "Mass Concentration Of Silicate In Sea Water";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/SLCAAAZX/";
    String units "micromoles per liter (umol/L)";
  }
  NO2 {
    Float32 _FillValue NaN;
    Float32 actual_range -0.0042, 0.6903;
    String bcodmo_name "NO2";
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String description "Nitrite.";
    String long_name "Mole Concentration Of Nitrite In Sea Water";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/NTRIAAZX/";
    String units "micromoles per liter (umol/L)";
  }
  NH4 {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 2.7319;
    String bcodmo_name "Ammonium";
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String description "Ammonium.";
    String long_name "Mole Concentration Of Ammonium In Sea Water";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/AMONAAZX/";
    String units "micromoles per liter (umol/L)";
  }
  NPOC {
    Float64 _FillValue NaN;
    Float64 actual_range 33.863424845013, 89.1148168472249;
    String bcodmo_name "unknown";
    String description "Non-purgeable organic carbon.";
    String long_name "NPOC";
    String units "micromolar (uM)";
  }
  TN {
    Float64 _FillValue NaN;
    Float64 actual_range -0.582144637561226, 39.4832295002114;
    String bcodmo_name "unknown";
    String description "Total nitrogen.";
    String long_name "TN";
    String units "micromolar (uM)";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson";
    String acquisition_description 
"Samples for inorganic nutrient analysis were collected in HDPE bottles and
frozen (-20\\u00baC) immediately after sample collection. Samples were kept
frozen until processing by Joe Jennings at Oregon State University. The
analyses for phosphate (PO4), nitrate plus nitrite (NO3_NO2), nitrite (NO2),
ammonium (NH4), and silicic acid (silicate) were performed using a hybrid
Technicon AutoAnalyzerII and Alpkem RFA300 system following protocols modified
from Gordon et al. (see below for reference). The estimated precision for each
element was as follows: PO4, \\u00b1 0.008 \\u00b5M; NO3_NO2, \\u00b1 0.15
\\u00b5M; NO2, \\u00b1 0.01 \\u00b5M; silicic acid, \\u00b1 0.3 \\u00b5M.
 
To obtain the concentration of total organic carbon (TOC) and total nitrogen
(TN), a 40 ml aliquot of whole seawater was acidified to pH~3 with
concentrated hydrochloric acid (HCl) and stored in combusted glass vials at
4\\u00b0C until analysis with a Shimadzu TOC-VCSH total organic carbon analyzer
coupled to a TNM-1 analyzer. Blanks (MilliQ water) and standard curves with
potassium hydrogen phthalate and potassium nitrate were interspersed into the
sample runs. The coefficient of variability between replicate injections was
<1%. Comparisons to standards provided by Prof. D. Hansell (University of
Miami) were made daily.
 
References:  
 Gordon, L. I., J. C. Jennings, Jr., A. A. Ross, and J. M. Krest. 1994. A
suggested protocol for continuous flow automated analysis of seawater
nutrients (phosphate, nitrate, nitrite and silicic acid) in the WOCE
Hydrographic Program and the Joint Global Ocean Fluxes Study. In WOCE
operations manual. WOCE report no. 68/91, revision 1. WHP Office Report
WHPO91-1. Woods Hole Oceanographic Institution, Woods Hole, Mass.";
    String awards_0_award_nid "54954";
    String awards_0_award_number "OCE-1154320";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1154320";
    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 "Donald L. Rice";
    String awards_0_program_manager_nid "51467";
    String cdm_data_type "Other";
    String comment 
"Inorganic and organic nutrients from Niskin bottles 
 PI: Elizabeth Kujawinski (WHOI) 
 Co-PI & Contact: Krista Longnecker (WHOI) 
 Version History: 
   25 July 2016 - removed one questionable NPOC value per request of PI (cast 18, niskin 21) 
   15 Dec 2013 - original version 
 Note: Inorganic nutrient values below zero should be considered as  
       below the detection limit for the instrument";
    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 "2013-12-20T18:48:40Z";
    String date_modified "2019-11-20T19:08:31Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.1575/1912/bco-dmo.473296.1";
    Float64 Easternmost_Easting -24.000749;
    Float64 geospatial_lat_max 9.700333;
    Float64 geospatial_lat_min -38.0026;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -24.000749;
    Float64 geospatial_lon_min -55.299424;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 5532.903;
    Float64 geospatial_vertical_min 5.234;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2020-09-28T17:29:51Z (local files)
2020-09-28T17:29:51Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_473296.das";
    String infoUrl "https://www.bco-dmo.org/dataset/473296";
    String institution "BCO-DMO";
    String instruments_0_acronym "Niskin bottle";
    String instruments_0_dataset_instrument_nid "473303";
    String instruments_0_description "A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends.  The bottles can be attached individually on a hydrowire or deployed in 12, 24 or 36 bottle Rosette systems mounted on a frame and combined with a CTD.  Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/";
    String instruments_0_instrument_name "Niskin bottle";
    String instruments_0_instrument_nid "413";
    String instruments_0_supplied_name "Niskin bottle";
    String instruments_1_acronym "Shimadzu TOC-V";
    String instruments_1_dataset_instrument_description "The concentrations of total organic carbon (TOC) and total nitrogen (TN) were determined with a Shimadzu TOC-VCSH total organic carbon analyzer coupled to a TNM-1 analyzer.";
    String instruments_1_dataset_instrument_nid "473310";
    String instruments_1_description "A Shimadzu TOC-V Analyzer measures DOC by high temperature combustion method.";
    String instruments_1_instrument_external_identifier "http://onto.nerc.ac.uk/CAST/124";
    String instruments_1_instrument_name "Shimadzu TOC-V Analyzer";
    String instruments_1_instrument_nid "603";
    String instruments_1_supplied_name "Shimadzu TOC-V";
    String instruments_2_acronym "Technicon AutoAnalyzerII";
    String instruments_2_dataset_instrument_description "The analyses for phosphate (PO4), nitrate plus nitrite (NO3_NO2), nitrite (NO2), ammonium (NH4), and silicic acid (silicate) were performed using a hybrid Technicon AutoAnalyzerII and Alpkem RFA300.";
    String instruments_2_dataset_instrument_nid "473307";
    String instruments_2_description "A rapid flow analyzer that may be used to measure nutrient concentrations in seawater. It is a continuous segmented flow instrument consisting of a sampler, peristaltic pump, analytical cartridge, heating bath, and colorimeter. See more information about this instrument from the manufacturer.";
    String instruments_2_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL0291/";
    String instruments_2_instrument_name "Technicon AutoAnalyzerII";
    String instruments_2_instrument_nid "473306";
    String instruments_2_supplied_name "Technicon AutoAnalyzerII";
    String instruments_3_acronym "Alpkem RFA300";
    String instruments_3_dataset_instrument_description "The analyses for phosphate (PO4), nitrate plus nitrite (NO3_NO2), nitrite (NO2), ammonium (NH4), and silicic acid (silicate) were performed using a hybrid Technicon AutoAnalyzerII and Alpkem RFA300.";
    String instruments_3_dataset_instrument_nid "473309";
    String instruments_3_description "A rapid flow analyser (RFA) that may be used to measure nutrient concentrations in seawater. It is an air-segmented, continuous flow instrument comprising a sampler, a peristaltic pump which simultaneously pumps samples, reagents and air bubbles through the system, analytical cartridge, heating bath, colorimeter, data station, and printer. The RFA-300 was a precursor to the smaller Alpkem RFA/2 (also RFA II or RFA-2).";
    String instruments_3_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL0414/";
    String instruments_3_instrument_name "Alpkem RFA300";
    String instruments_3_instrument_nid "473308";
    String instruments_3_supplied_name "Alpkem RFA300";
    String keywords "ammonia, ammonium, bco, bco-dmo, biological, bots, cast, chemical, chemistry, concentration, data, dataset, date, date_start_utc, depth, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Ammonia, Earth Science > Oceans > Ocean Chemistry > Nitrate, Earth Science > Oceans > Ocean Chemistry > Phosphate, Earth Science > Oceans > Ocean Chemistry > Silicate, erddap, event, event_start, latitude, longitude, management, mass, mass_concentration_of_phosphate_in_sea_water, mass_concentration_of_silicate_in_sea_water, mole, mole_concentration_of_ammonium_in_sea_water, mole_concentration_of_nitrate_in_sea_water, mole_concentration_of_nitrite_in_sea_water, n02, nh4, niskin, nitrate, nitrite, NO2, no3, NO3_NO2, npoc, ocean, oceanography, oceans, office, phosphate, po4, preliminary, press, science, sea, seawater, silicate, start, station, time, time_start_utc, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "https://www.bco-dmo.org/dataset/473296/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/473296";
    Float64 Northernmost_Northing 9.700333;
    String param_mapping "{'473296': {'depth': 'flag - depth', 'lon_start': 'flag - longitude', 'lat_start': 'flag - latitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/473296/parameters";
    String people_0_affiliation "Woods Hole Oceanographic Institution";
    String people_0_affiliation_acronym "WHOI";
    String people_0_person_name "Elizabeth Kujawinski";
    String people_0_person_nid "51089";
    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";
    String people_1_person_name "Krista Longnecker";
    String people_1_person_nid "51483";
    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";
    String people_2_person_name "Krista Longnecker";
    String people_2_person_nid "51483";
    String people_2_role "Contact";
    String people_2_role_type "related";
    String people_3_affiliation "Woods Hole Oceanographic Institution";
    String people_3_affiliation_acronym "WHOI BCO-DMO";
    String people_3_person_name "Shannon Rauch";
    String people_3_person_nid "51498";
    String people_3_role "BCO-DMO Data Manager";
    String people_3_role_type "related";
    String project "Deep Atlantic DOM";
    String projects_0_acronym "Deep Atlantic DOM";
    String projects_0_description 
"Transformations of dissolved organic matter (DOM) in the deep ocean have profound impacts on the global carbon cycle due to the sequestration of carbon dioxide (CO2) away from the atmosphere.  Although research has been conducted on the high molecular weight component of this material, the same cannot be said for low molecular weight DOM because the needed analytical techniques have not been available to determine its composition and reactivity.
In recent years, a research team at Woods Hole Oceanographic Institution has acquired the necessary analytical capability. As such, in this project, they will carry out the first systematic survey of deep ocean DOM in the western Atlantic Ocean to characterize the low molecular weight fraction of DOM in southward flowing North Atlantic Deep Water (NADW), northward flowing Antarctic Bottom Water (AABW), and Antarctic Intermediate Water (AAIW).  Using ultrahigh resolution mass spectrometry and multi-stage fragmentation coupled to liquid chromatography, the scientists will determine the spatial variability in the composition of DOM along the flow path of the water masses, as well as assess the source water, transport, and surface processes that contribute to temporal changes in DOM composition.  These results will be augmented with structural elucidation and quantitative assays of unique marker compounds for each water mass.  Results will provide important insights into the biogeochemical reactions that govern DOM dynamics in the deep ocean.";
    String projects_0_end_date "2015-01";
    String projects_0_geolocation "Western Atlantic Ocean";
    String projects_0_name "Dissolved Organic Matter Composition in the Deep Atlantic Ocean";
    String projects_0_project_nid "2204";
    String projects_0_start_date "2012-02";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -38.0026;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Inorganic and organic nutrient data from Niskin bottles from the KN210-04 cruise. Data include concentration of: phosphate, nitrate+nitrite, silicate, nitrite, ammonium, non-purgeable organic carbon, and total nitrogen.";
    String title "Inorganic and organic nutrient data from Niskin bottles from R/V Knorr cruise KN210-04 in the Western Atlantic Ocean between Uruguay and Barbados in 2013 (Deep Atlantic DOM project)";
    String version "1";
    Float64 Westernmost_Easting -55.299424;
    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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