ERDDAP
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| Dataset Title: | Groundwater Flow Dynamics in Subarctic Beach Using Radioactive and Stable Isotopes, Gulf of St. Lawrence, Qc 
|
| Institution: | Institut des sciences de la mer (Dataset ID: ismerRiviereStJeanIsotopes) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
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| Subset
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|
Attributes {
s {
sampleID {
String ioos_category "Identifier";
String long_name "Sample identifier";
String nerc_standard_name "sample_identifier";
String nerc_standard_name_identifier "https://vocab.nerc.ac.uk/collection/P01/current/SAMPID01/";
String original_name "samples";
String units "unitless";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.67701482e+9, 1.69844904e+9;
String axis "T";
String coverage_content_type "coordinate";
String datatype "string";
String ioos_category "Time";
String long_name "Time";
String standard_name "time";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0115/";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 _FillValue 1.0e+36;
Float32 actual_range 50.28396, 50.29429;
String axis "Y";
Float64 colorBarMaximum 50.3;
Float64 colorBarMinimum 50.27;
String description "Latitude coordinates of the sampling sites in decimal degrees (degrees north)";
String ioos_category "Location";
String long_name "Latitude";
String original_name "lat";
String standard_name "latitude";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0600/";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float32 _FillValue 1.0e+36;
Float32 actual_range -64.36954, -64.34128;
String axis "X";
Float64 colorBarMaximum -64.33;
Float64 colorBarMinimum -64.38;
String description "Longitude coordinates of the sampling sites in decimal degrees (degrees east)";
String ioos_category "Location";
String long_name "Longitude";
String original_name "long";
String source_name "long";
String standard_name "longitude";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0554/";
String units "degrees_east";
}
hour {
String ioos_category "Time";
String long_name "Local time of the day";
String original_name "hour";
String units "HH:mm";
}
day {
String ioos_category "Time";
String long_name "Sampling date";
String original_name "day";
String units "CCYYMMDD";
}
month {
String ioos_category "Time";
String long_name "Month of the year";
String original_name "month";
String units "unitless";
}
sample_origin {
String description
"Can be \"sea\", \"beach\", or \"cliff\" :
- \"sea\": water sampled from a boat distant from the shore
- \"beach\": groundwater sampled in the beach
- \"cliff\": resurgent water sampled from the cliff";
String long_name "Sample origin";
String original_name "type";
String units "unitless";
}
water_temperature {
Float32 _FillValue 1.0e+36;
Float32 actual_range -6.34, 4.64;
Float64 colorBarMaximum 5.0;
Float64 colorBarMinimum -6.5;
String colorBarPalette "KT_thermal";
String instrument "YSI multiparameter sonde";
String instrument_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1748/";
String ioos_category "Temperature";
String long_name "Temperature";
String original_name "temp (°C)";
String standard_name "sea_water_temperature";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0335/";
String units "degree_C";
String units_metadata "on_scale";
}
water_salinity {
Float32 _FillValue 1.0e+36;
Float32 actual_range 0.03, 32.65;
Float64 colorBarMaximum 33.0;
Float64 colorBarMinimum 0.0;
String colorBarPalette "KT_haline";
String instrument "YSI multiparameter sonde";
String instrument_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1748/";
String ioos_category "Salinity";
String long_name "Practical Salinity";
String original_name "sal";
String standard_name "sea_water_practical_salinity";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/IADIHDIJ/";
String units "PSU";
}
delta18O {
Float32 _FillValue 1.0e+36;
Float32 actual_range -14.08, -1.75;
Float64 colorBarMaximum -1.5;
Float64 colorBarMinimum -14.1;
String colorBarPalette "YellowRed";
String instrument "Elemental Analyzer-Isotope Ratio Mass Spectrometer";
String ioos_category "Other";
String long_name "Isotope ratio of 18O to 16O";
String original_name "D18O (‰)";
String standard_name "isotope_ratio_of_18o_to_16o_in_sea_water_excluding_solutes_and_solids";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/EQUNJT0R/";
String units "per mill of VSMOW";
}
delta2H {
Float32 _FillValue 1.0e+36;
Float32 actual_range -99.66, -12.6;
Float64 colorBarMaximum -12.5;
Float64 colorBarMinimum -100.0;
String colorBarPalette "YellowRed";
String instrument "Elemental Analyzer-Isotope Ratio Mass Spectrometer";
String ioos_category "Other";
String long_name "Isotope ratio of 2H to 1H";
String original_name "D2H (‰)";
String standard_name "isotope_ratio_of_2h_to_1h_in_sea_water_excluding_solutes_and_solids";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/6YRT2R8Z/";
String units "mg m-3";
}
radon222_water {
Float32 _FillValue 1.0e+36;
Float32 actual_range 0.0, 24352.31;
String ancillary_variables "std_222Rn";
Float64 colorBarMaximum 24000.0;
Float64 colorBarMinimum 0.1;
String colorBarPalette "YellowRed";
String colorBarScale "Log";
String comment "Radon activity measured in an air loop connected to a water-air exchange cell.";
String instrument_01 "RAD7 alpha decay detector with Big Bottle System accessory - Durridge";
String ioos_category "Other";
String long_name "Radon-222 activity in water";
String original_name "²²²Rn (dpm/100L)";
String standard_name "integral_wrt_time_of_radioactivity_concentration_of_222rn_in_air";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/Z5FQITOY/";
String units "dpm 100L-1";
}
std_222Rn {
Float32 _FillValue 1.0e+36;
Float32 actual_range 0.0, 2660.337;
Float64 colorBarMaximum 2050.0;
Float64 colorBarMinimum 0.0;
String colorBarPalette "YellowRed";
String ioos_category "Statistics";
String long_name "Radon-222 activity standard deviation";
String original_name "²²²Rn (err)";
String units "dpm 100L-1";
}
radium224_water {
Float32 _FillValue 1.0e+36;
Float32 actual_range 8.67, 2490.73;
String ancillary_variables "std_224Ra";
Float64 colorBarMaximum 2500.0;
Float64 colorBarMinimum 0.1;
String colorBarPalette "YellowRed";
String colorBarScale "Log";
String comment "Radium activity measured in a closed air loop connected to a manganese-coated fiber used to filter the water sample.";
String instrument "Radium delayed coincidence counter - RaDeCC";
String instrument_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1243/";
String ioos_category "Other";
String long_name "Radium-224 activity in water";
String original_name "224Raex (dpm/100L)";
String standard_name "integral_wrt_time_of_radioactivity_concentration_of_224ra_in_air";
String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/NAWZYUBK/";
String units "dpm 100L-1";
}
std_224Ra {
Float32 _FillValue 1.0e+36;
Float32 actual_range 0.27, 147.57;
Float64 colorBarMaximum 150.0;
Float64 colorBarMinimum 0.0;
String colorBarPalette "YellowRed";
String ioos_category "Statistics";
String long_name "Radium-224 activity standard deviation";
String original_name "224Raex (err)";
String units "dpm 100L-1";
}
}
NC_GLOBAL {
String cdm_data_type "Point";
String contributor_institution "(1) Institut des sciences de la mer, (2) Institut des sciences de la mer, (3) Université du Québec à Rimouski, (4) Université Toulouse III - Paul Sabatier, (5) Institut des sciences de la mer";
String contributor_name "(1) Laísa Peixoto Ramos, (2) Gwénaëlle Chaillou, (3) Pascal Bernatchez, (4) Pieter van Beek, (5) Antoine Biehler";
String contributor_role "(1) Data Owner, Author, (2) Metadata Custodian, Coauthor, (3-5) Coauthor";
String contributor_type "person";
String Conventions "CF-1.11, COARDS ACDD-1.3, NCCSV-1.2";
String creator_name "Laísa Peixoto Ramos";
String creator_type "person";
String defaultDataQuery "&time>=min(time)";
String defaultGraphQuery "longitude,latitude,time&time>=min(time)&.bgColor=0xffffffff&longitude>-64.38&longitude<-64.33&latitude>50.27&latitude<50.3";
String doi "https://doi.org/10.26071/d27287f7-b780-4e5c";
Float64 Easternmost_Easting -64.34128;
String featureType "Point";
Float64 geospatial_lat_max 50.29429;
Float64 geospatial_lat_min 50.28396;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -64.34128;
Float64 geospatial_lon_min -64.36954;
String geospatial_lon_units "degrees_east";
String grid_mapping_epsg_code "EPSG:4326";
String grid_mapping_epsg_code_url "https://epsg.io/4326";
String grid_mapping_geographic_crs_name "WGS 84";
String grid_mapping_inverse_flattening "298.2572236";
String grid_mapping_name "latitude_longitude";
String grid_mapping_prime_meridian_name "Greenwich";
String grid_mapping_semi_major_axis "6378137";
String history
"Database was standardized by SLGO through an ETL process with the following steps:
- Concatenation of variables 'day' and 'hour' using the 'T' separator to created the 'time' variable;
- Conversion of the 'time' variable from timezone 'America/Toronto' to UTC;
- Conversion of the 'day' variable from '%d-%m-%y' format to '%Y-%m-%d' format;
- Standardisation of header variable names (original name is preserved in the metadata for each variable)
2026-10-16T21:13:29Z (local files)
2026-10-16T21:13:29Z http://erddap.cioos.ca/erddap/tabledap/ismerRiviereStJeanIsotopes.html";
String infoUrl "https://doi.org/10.26071/d27287f7-b780-4e5c";
String institution "Institut des sciences de la mer";
String instrument_vocabulary "https://vocab.nerc.ac.uk/collection/L22/current/";
String keywords "cold region hydrology, radioisotopes, subarctic beach, submarine groundwater discharge, subterranean estuary, transient tracers, water stable isotopes";
String keywords_vocabulary "GCMD Science Keywords";
String license "Creative Commons Attribution 4.0 International license CC-BY 4.0";
String license_url "https://creativecommons.org/licenses/by/4.0/";
String licenseUrl "https://creativecommons.org/licenses/by/4.0/";
String marine_region "Gulf of St.Lawrence Coastal Drainages";
String marine_region_identifier "http://marineregions.org/mrgid/63554";
Float64 Northernmost_Northing 50.29429;
String platform "self-propelled small boat";
String platform_vocabulary "https://vocab.nerc.ac.uk/collection/L06/current/";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 50.28396;
String standard_name_nerc_vocabulary "The NERC Vocabulary Server (NVS)";
String standard_name_vocabulary "CF Standard Name Table v90";
String subsetVariables "sampleID, day, month, sample_origin";
String summary "This dataset presents a study of groundwater dynamics along a subarctic coastal environment of the St. Lawrence Gulf. To this purpose, sampling was conducted along a sandy beach located at the base of coastal cliffs in Rivière St. Jean, Quebec, Canada. Water samples were collected to measure concentrations of stable water isotopes (δ2H and δ18O) and short-lived radioisotopic tracers (222Rn, 223Ra, 224Ra). Additional measurements included water temperature and salinity to characterize basic properties of the water masses. Samples were collected from the cliffs, the beach and the seawater. Three sampling campaigns were conducted in 2023 to capture seasonal variations: February (freezing period), April (thawing period) and October (before the new freezing period). A total of 54 samples were collected in these periods to document temporal changes in groundwater flow patterns under variable ice conditions. The results obtained provide significant insights into groundwater recirculation processes and freshwater contribution rates in seasonally frozen coastal environments.";
String time_coverage_end "2023-10-27T23:24:00Z";
String time_coverage_start "2023-02-21T21:27:00Z";
String title "Groundwater Flow Dynamics in Subarctic Beach Using Radioactive and Stable Isotopes, Gulf of St. Lawrence, Qc";
Float64 Westernmost_Easting -64.36954;
}
}
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.