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Dataset Title:  [GP15 Nitrate d15N and d18O Leg 1] - Nitrate d15N and d18O from Niskin bottle
samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES
Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle
from September to October 2018 (US GEOTRACES Pacific Meridional Transect (GP15))
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_928002_v1)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 Station_ID (unitless) ?          "1"    "9"
 Event_ID (unitless) ?          6520    6768
 Start_Date_UTC (unitless) ?          "20180924"    "20181021"
 Start_Time_UTC (unitless) ?          "0010"    "2309"
 time (Start_iso_datetime_utc, UTC) ?          2018-09-24T11:20:00Z    2018-10-21T15:03:00Z
  < slider >
 End_Date_UTC (unitless) ?          "20180924"    "20181021"
 End_Time_UTC (unitless) ?          "0008"    "2357"
 End_ISO_DateTime_UTC (UTC) ?          2018-09-24T11:20:00Z    2018-10-21T15:52:00Z
 latitude (Start_latitude, degrees_north) ?          19.6808    56.0585
  < slider >
 longitude (Start_longitude, degrees_east) ?          -156.9628    -151.9995
  < slider >
 End_Latitude (degrees_north) ?          19.6808    56.0585
 End_Longitude (degrees_east) ?          -156.9628    -151.9994
 Sample_ID (unitless) ?          12348    13883
 depth (Sample_depth, m) ?          3.77    5568.36
  < slider >
 NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq (per mil versus air) ?          3.95    24.83
 SD1_NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq (per mil versus air) ?          0.0    0.64
 Flag_NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq (unitless) ?          1    1
 NITRATE_18_16_D_DELTA_BOTTLE_no8ude (per mil versus VSMOW) ?          1.9    24.52
 SD1_NITRATE_18_16_D_DELTA_BOTTLE_no8ude (per mil versus VSMOW) ?          0.0    0.68
 Flag_NITRATE_18_16_D_DELTA_BOTTLE_no8ude (unitless) ?          1    1
 Comment (unitless) ?          "Nitrite removed"    "Nitrite removed"
 
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File type: (more information)

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Station_ID {
    String long_name "Station_id";
    String units "unitless";
  }
  Event_ID {
    Int32 actual_range 6520, 6768;
    String long_name "Event_id";
    String units "unitless";
  }
  Start_Date_UTC {
    String long_name "Start_date_utc";
    String units "unitless";
  }
  Start_Time_UTC {
    String long_name "Start_time_utc";
    String units "unitless";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.537788e+9, 1.54013418e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Start_iso_datetime_utc";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  End_Date_UTC {
    String long_name "End_date_utc";
    String units "unitless";
  }
  End_Time_UTC {
    String long_name "End_time_utc";
    String units "unitless";
  }
  End_ISO_DateTime_UTC {
    Float64 actual_range 1.537788e+9, 1.54013712e+9;
    String ioos_category "Time";
    String long_name "End_iso_datetime_utc";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 19.6808, 56.0585;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Start_latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -156.9628, -151.9995;
    String axis "X";
    String ioos_category "Location";
    String long_name "Start_longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  End_Latitude {
    Float32 actual_range 19.6808, 56.0585;
    String long_name "End_latitude";
    String units "degrees_north";
  }
  End_Longitude {
    Float32 actual_range -156.9628, -151.9994;
    String long_name "End_longitude";
    String units "degrees_east";
  }
  Sample_ID {
    Int32 actual_range 12348, 13883;
    String long_name "Sample_id";
    String units "unitless";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float32 actual_range 3.77, 5568.36;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Sample_depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq {
    Float32 actual_range 3.95, 24.83;
    String long_name "Nitrate_15_14_d_delta_bottle_lnw6zq";
    String units "per mil versus air";
  }
  SD1_NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq {
    Float32 actual_range 0.0, 0.64;
    String long_name "Sd1_nitrate_15_14_d_delta_bottle_lnw6zq";
    String units "per mil versus air";
  }
  Flag_NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq {
    Int32 actual_range 1, 1;
    String long_name "Flag_nitrate_15_14_d_delta_bottle_lnw6zq";
    String units "unitless";
  }
  NITRATE_18_16_D_DELTA_BOTTLE_no8ude {
    Float32 actual_range 1.9, 24.52;
    String long_name "Nitrate_18_16_d_delta_bottle_no8ude";
    String units "per mil versus VSMOW";
  }
  SD1_NITRATE_18_16_D_DELTA_BOTTLE_no8ude {
    Float32 actual_range 0.0, 0.68;
    String long_name "Sd1_nitrate_18_16_d_delta_bottle_no8ude";
    String units "per mil versus VSMOW";
  }
  Flag_NITRATE_18_16_D_DELTA_BOTTLE_no8ude {
    Int32 actual_range 1, 1;
    String long_name "Flag_nitrate_18_16_d_delta_bottle_no8ude";
    String units "unitless";
  }
  Comment {
    String long_name "Comment";
    String units "unitless";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_url "https://www.bco-dmo.org/";
    String doi "10.26008/1912/bco-dmo.928002.1";
    Float64 Easternmost_Easting -151.9995;
    Float64 geospatial_lat_max 56.0585;
    Float64 geospatial_lat_min 19.6808;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -151.9995;
    Float64 geospatial_lon_min -156.9628;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 5568.36;
    Float64 geospatial_vertical_min 3.77;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2024-11-05T23:14:06Z (local files)
2024-11-05T23:14:06Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_928002_v1.html";
    String infoUrl "https://www.bco-dmo.org/dataset/928002";
    String institution "BCO-DMO";
    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.";
    Float64 Northernmost_Northing 56.0585;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 19.6808;
    String summary 
"These data include nitrate δ15N and δ18O along US GEOTRACES GP15, a meridional transect at ~152°W in the Pacific Ocean. The Pacific hosts significant rates of all the fluxes that are relevant to the global N cycle: the N budget fluxes (those that either generate or consume fixed N; N2 fixation and denitrification) as well as the N fluxes from the internal N cycle (those that generate or consume nitrate but leave the fixed N pool unaltered; nitrate regeneration and assimilation). The nitrate δ15N and δ18O provide a useful tool to separate and possibly quantify the overlapping impacts of all these co-occurring processes. 

GP15 was a 60-day research cruise that took place in 2018 along a transect form Alaska to Tahiti at 152° W on board of the R/V Revelle. The cruise was completed in two legs (RR1814 and RR1815), which started on the 18th of September and on the 24th of October 2018, respectively. This dataset includes data from Leg 1 (RR1814). Leg 2 data (RR1815) are provided in a separate, related dataset.";
    String time_coverage_end "2018-10-21T15:03:00Z";
    String time_coverage_start "2018-09-24T11:20:00Z";
    String title "[GP15 Nitrate d15N and d18O Leg 1] - Nitrate d15N and d18O from Niskin bottle samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 (US GEOTRACES Pacific Meridional Transect (GP15))";
    Float64 Westernmost_Easting -156.9628;
  }
}

 

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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