Accessing BCO-DMO data
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| Dataset Title: | [Particulate trace elements] - Particulate trace element concentrations from the NOAA R/V Ronald H. Brown CLIVAR A16N cruise in 2013. (Collaborative Research: Trace Metal Deposition And Cycling In The North Atlantic On The 2013 CLIVAR/Repeat Hydrography A16N Expedition) 
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| Institution: | BCO-DMO (Dataset ID: bcodmo_dataset_699160) |
| Information: | Summary
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| FGDC
| ISO 19115
| Metadata
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Attributes {
s {
SECT_ID {
String bcodmo_name "cruise_part";
String description "Section ID number";
String long_name "SECT ID";
String units "unitless";
}
DATE {
Int32 _FillValue 2147483647;
Int32 actual_range 20130804, 20130929;
String bcodmo_name "date";
String description "Date sample was taken; YYYYMMDD";
String long_name "DATE";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
String units "unitless";
}
STNNBR {
Int16 _FillValue 32767;
Int16 actual_range 3, 136;
String bcodmo_name "station";
String description "Station number";
String long_name "STNNBR";
String units "unitless";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 _FillValue NaN;
Float64 actual_range -1.9988, 63.1154;
String axis "Y";
String bcodmo_name "latitude";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String description "Latitude; E 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 -29.0034, -19.9917;
String axis "X";
String bcodmo_name "longitude";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String description "Longitude; N is positive";
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";
}
CASTNO {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 1, 3;
String bcodmo_name "cast";
String description "Cast number";
String long_name "CASTNO";
String units "unitless";
}
SAMPNO {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 1, 12;
String bcodmo_name "sample";
String description "Sample number";
String long_name "SAMPNO";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
String units "unitless";
}
BTLNBR {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 1, 12;
String bcodmo_name "bot";
String description "Bottle number";
String long_name "BTLNBR";
String units "unitless";
}
time2 {
String bcodmo_name "time";
String description "Time sample was taken; HH:MM";
String long_name "TIME";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/";
String units "unitless";
}
CTDPRS {
Float32 _FillValue NaN;
Float32 actual_range 12.1, 1041.4;
String bcodmo_name "pressure";
String description "Pressure";
String long_name "CTDPRS";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PRESPR01/";
String units "dbar";
}
Mg {
Float32 _FillValue NaN;
Float32 actual_range 0.9, 263.3;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "MG";
String units "nmol/L";
}
Mg_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Mg FLAG";
String units "unitless";
}
Al {
Float32 _FillValue NaN;
Float32 actual_range 0.6, 51.31;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "Al";
String units "nmol/L";
}
Al_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Al FLAG";
String units "unitless";
}
Si {
Float32 _FillValue NaN;
Float32 actual_range 0.8, 611.7;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "Mass Concentration Of Silicate In Sea Water";
String units "nmol/L";
}
Si_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Si FLAG";
String units "unitless";
}
P {
Float32 _FillValue NaN;
Float32 actual_range 0.45, 103.82;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "P";
String units "nmol/L";
}
P_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "P FLAG";
String units "unitless";
}
S {
Float32 _FillValue NaN;
Float32 actual_range 0.35, 308.66;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "S";
String units "nmol/L";
}
S_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "S FLAG";
String units "unitless";
}
Cl {
Float32 _FillValue NaN;
Float32 actual_range 0.4, 2881.5;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "CL";
String units "nmol/L";
}
Cl_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Cl FLAG";
String units "unitless";
}
Ca {
Float32 _FillValue NaN;
Float32 actual_range 4.6, 1792.2;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "Ca";
String units "nmol/L";
}
Ca_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Ca FLAG";
String units "unitless";
}
Ti {
Float32 _FillValue NaN;
Float32 actual_range 0.07, 12.65;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "Ti";
String units "nmol/L";
}
Ti_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Ti FLAG";
String units "unitless";
}
Mn {
Float32 _FillValue NaN;
Float32 actual_range 0.03, 1.13;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "MN";
String units "nmol/L";
}
Mn_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Mn FLAG";
String units "unitless";
}
Fe {
Float32 _FillValue NaN;
Float32 actual_range 0.06, 36.19;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "Fe";
String units "nmol/L";
}
Fe_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Fe FLAG";
String units "unitless";
}
Ni {
Float32 _FillValue NaN;
Float32 actual_range 0.015, 0.386;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "Ni";
String units "nmol/L";
}
Ni_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Ni FLAG";
String units "unitless";
}
Cu {
Float32 _FillValue NaN;
Float32 actual_range 0.02, 1.22;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "Cu";
String units "nmol/L";
}
Cu_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Cu FLAG";
String units "unitless";
}
Zn {
Float32 _FillValue NaN;
Float32 actual_range 0.02, 0.55;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "ZN";
String units "nmol/L";
}
Zn_LAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 2;
String bcodmo_name "q_flag";
String description "Flag for particulate trace element concentration";
String long_name "Zn LAG";
String units "unitless";
}
Br {
Float32 _FillValue NaN;
Float32 actual_range 0.02, 8.54;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "BR";
String units "nmol/L";
}
Br_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Br FLAG";
String units "unitless";
}
Sr {
Float32 _FillValue NaN;
Float32 actual_range 0.08, 9.3;
String bcodmo_name "trace_element_conc";
String description "Particulate trace element concentration";
String long_name "SR";
String units "nmol/L";
}
Sr_FLAG {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 2, 3;
String bcodmo_name "q_flag";
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String description "Flag for particulate trace element concentration";
String long_name "Sr FLAG";
String units "unitless";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.3755858e+9, 1.38041316e+9;
String axis "T";
String bcodmo_name "ISO_DateTime_UTC";
String description "Date/Time (UTC) ISO formatted";
String ioos_category "Time";
String long_name "ISO Date Time UTC";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/";
String source_name "ISO_DateTime_UTC";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String time_precision "1970-01-01T00:00:00Z";
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
"Seawater samples were collected from the surface ocean to depths of
750\\u20131000 m, then sub-sampled for suspended particulate matter under
trace-element-clean conditions (see Measures et al., 2008 for details).
Briefly, suspended particulate matter samples were collected by pressurizing
GO-FLO bottles with <10 psi filtered, compressed air. Samples were filtered
through acid-cleaned 0.4 um polycarbonate filters (Nuclepore) in polypropylene
holders. Acid-cleaned backing filters of mixed cellulose esters were used to
ensure even loading on sample filters.\\u00a0 Samples were rinsed while on the
filter holders with 15\\u201320 mL deionized (DI) water adjusted to pH 8 with
ammonium hydroxide from the edges to the center, with a low vacuum applied to
avoid loss or re-distribution of particles. Filtration was started
approximately 30 to 60 minutes after water samples were collected and was
generally completed within 60 minutes.
Particulate trace element concentrations were determined by energy-dispersive
X-ray fluorescence (ED-XRF) using a thin film technique described by Feely et
al. (1991). An optical subsample of each filter was analyzed on a Thermo
Fisher Quant\\u2019X equipped with a Rhodium Target X-Ray tube and an
electronically cooled, lithium-drifted solid state detector. X-rays for
primary sample excitation were filtered for optimum control of peak-to-
background ratios. Standards for calibration consisted of commercial thin film
standards (MicroMatter), geochemical reference sample material MAG-1 (Gladney
and Roelandts, 1988) finely ground and loaded onto polycarbonate filters
(Feely et al., 1991), and a series of standards prepared using a modification
of the method reported by Holynska and Bisiniek (1976) using sodium
diethyldithiocarbamate (NaDDTC) to quantitatively precipitate trace metals
from a solution of known concentration. These standards were prepared using a
1% NaDDTC solution that was added to trace metal solutions at pH 4 with a
ligand-to-metal ratio of 4:1. The resulting precipitate was filtered over an
acid-cleaned, 0.4 um polycarbonate Nuclepore filter. Procedural blanks were
made by addition of a NaDDTC solution to a sample of acidified DI water
followed by filtration. MicroMatter and MAG-1 standards were used to create
individual standard curves for all elements; standard curves for Fe and Mn
also included NaDDTC standards.\\u00a0
Four different excitation conditions, all conducted under a vacuum atmosphere,
were used for sample analysis and are detailed along with minimum
determination limits (MDL) in Table 1. MDLs are defined as 3 times the square
root of the background intensity measured from a standard of known
concentration:
MDL = ( 3 * \\u221aIb)/(Ip/conc)\\u00a0\\u00a0 \\u00a0
where\\u00a0Ib\\u00a0is the background intensity,\\u00a0Ip\\u00a0is the peak
intensity, and\\u00a0conc\\u00a0is the concentration of the standard.
MicroMatter standards were used to calculate MDLs.\\u00a0";
String awards_0_award_nid "651512";
String awards_0_award_number "OCE-1260376";
String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1260376";
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 "Henrietta N Edmonds";
String awards_0_program_manager_nid "51517";
String awards_1_award_nid "651517";
String awards_1_award_number "OCE-1260287";
String awards_1_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1260287";
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 "Henrietta N Edmonds";
String awards_1_program_manager_nid "51517";
String cdm_data_type "Other";
String comment
"Particulate Trace Elements
J. Resing and W. Landing, PIs
Version 26 April 2017";
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 "2017-04-28T22:26:26Z";
String date_modified "2019-10-02T14:34:26Z";
String defaultDataQuery "&time<now";
String doi "10.1575/1912/bco-dmo.699160.1";
Float64 Easternmost_Easting -19.9917;
Float64 geospatial_lat_max 63.1154;
Float64 geospatial_lat_min -1.9988;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -19.9917;
Float64 geospatial_lon_min -29.0034;
String geospatial_lon_units "degrees_east";
String history
"2024-11-23T16:55:26Z (local files)
2024-11-23T16:55:26Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_699160.html";
String infoUrl "https://www.bco-dmo.org/dataset/699160";
String institution "BCO-DMO";
String instruments_0_acronym "GO-FLO";
String instruments_0_dataset_instrument_description "GO-FLO bottles with";
String instruments_0_dataset_instrument_nid "699283";
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_0_supplied_name "GO-FLO Bottle";
String instruments_1_acronym "CTD";
String instruments_1_dataset_instrument_description "Used to collect environmental data";
String instruments_1_dataset_instrument_nid "699285";
String instruments_1_description "The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column and permits scientists observe the physical properties in real time via a conducting cable connecting the CTD to a deck unit and computer on the ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast. This instrument designation is used when specific make and model are not known.";
String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/130/";
String instruments_1_instrument_name "CTD profiler";
String instruments_1_instrument_nid "417";
String instruments_1_supplied_name "CTD";
String instruments_2_acronym "XRF analyzer";
String instruments_2_dataset_instrument_description "Thermo Fisher Quant’X equipped with a Rhodium Target X-Ray tube and an electronically cooled, lithium-drifted solid state detector";
String instruments_2_dataset_instrument_nid "699284";
String instruments_2_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_2_instrument_name "X-ray fluorescence analyzer";
String instruments_2_instrument_nid "648910";
String instruments_2_supplied_name "Thermo Fisher Quant’X";
String keywords "Al_FLAG, bco, bco-dmo, biological, Br_FLAG, btlnbr, Ca_FLAG, castno, chemical, chemistry, Cl_FLAG, concentration, ctdprs, Cu_FLAG, data, dataset, date, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Silicate, erddap, Fe_FLAG, flag, iso, lag, latitude, longitude, management, mass, mass_concentration_of_silicate_in_sea_water, Mg_FLAG, Mn_FLAG, Ni_FLAG, ocean, oceanography, oceans, office, P_FLAG, preliminary, S_FLAG, sampno, science, sea, seawater, sect, SECT_ID, Si_FLAG, silicate, Sr_FLAG, stnnbr, Ti_FLAG, time, time2, water, Zn_LAG";
String keywords_vocabulary "GCMD Science Keywords";
String license "https://www.bco-dmo.org/dataset/699160/license";
String metadata_source "https://www.bco-dmo.org/api/dataset/699160";
Float64 Northernmost_Northing 63.1154;
String param_mapping "{'699160': {'LAT': 'master - latitude', 'LON': 'master - longitude', 'ISO_DateTime_UTC': 'flag - time'}}";
String parameter_source "https://www.bco-dmo.org/mapserver/dataset/699160/parameters";
String people_0_affiliation "National Oceanic and Atmospheric Administration";
String people_0_affiliation_acronym "NOAA-PMEL";
String people_0_person_name "Joseph A. Resing";
String people_0_person_nid "51303";
String people_0_role "Principal Investigator";
String people_0_role_type "originator";
String people_1_affiliation "Florida State University";
String people_1_affiliation_acronym "FSU";
String people_1_person_name "William M. Landing";
String people_1_person_nid "51302";
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 "Hannah Ake";
String people_2_person_nid "650173";
String people_2_role "BCO-DMO Data Manager";
String people_2_role_type "related";
String project "A16N Trace Metals";
String projects_0_acronym "A16N Trace Metals";
String projects_0_description
"Description from NSF award abstract:
Dr. Joseph Resing of the Joint Institute for the Study of the Atmosphere and the Ocean, Pacific Marine Environmental Laboratory, University of Washington and Dr. William Landing of Florida State University have proposed an ambitious field study to conduct trace metal sampling on the CLIVAR/CO2 Repeat Hydrography section A16N in the Atlantic Ocean in 2013. This field program will provide a valuable opportunity to elucidate aerosol-water column coupling, and possible decadal variability, for selected trace metals (Fe, Al, and others) and biogenic calcium carbonate. In addition to examining important questions regarding the nature of the response of trace element distributions in the water column to external dust input, these investigators will gain further insight into the issue of temporal and spatial changes in trace metal distributions through comparison with other field programs, most notably the international GEOTRACES program. With regard to the broader significance of this study, results from this large expedition will generate multiple national and international collaborations, contribute positively to the education and training of a graduate student and a postdoctoral fellow, and be of broad interest to the ocean sciences community.";
String projects_0_end_date "2016-03";
String projects_0_geolocation "Eastern North Atlantic";
String projects_0_name "Collaborative Research: Trace Metal Deposition And Cycling In The North Atlantic On The 2013 CLIVAR/Repeat Hydrography A16N Expedition";
String projects_0_project_nid "651513";
String projects_0_start_date "2013-04";
String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
String publisher_type "institution";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -1.9988;
String standard_name_vocabulary "CF Standard Name Table v55";
String subsetVariables "SECT_ID,Zn_LAG";
String summary "Particulate trace element concentrations from the NOAA R/V Ronald H. Brown CLIVAR A16N cruise in 2013.";
String time_coverage_end "2013-09-29T00:06:00Z";
String time_coverage_start "2013-08-04T03:10:00Z";
String title "[Particulate trace elements] - Particulate trace element concentrations from the NOAA R/V Ronald H. Brown CLIVAR A16N cruise in 2013. (Collaborative Research: Trace Metal Deposition And Cycling In The North Atlantic On The 2013 CLIVAR/Repeat Hydrography A16N Expedition)";
String version "1";
Float64 Westernmost_Easting -29.0034;
String xml_source "osprey2erddap.update_xml() v1.3";
}
}
Data Access Protocol (DAP) and its
selection constraints.
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.