Easier access to scientific data
Brought to you by NOAA NMFS SWFSC ERD
|
ERDDAP
Easier access to scientific data |
Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | Conductivity Temperature Depth (CTD) sensor profile data binned by depth from PAL LTER annual cruises, 1991, 2017 (ongoing). 
|
| Institution: | National Science Foundation (Dataset ID: CruiseCTDProfiles) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Files
| Make a graph
|
Attributes {
s {
study_name {
String cf_role "trajectory_id";
String column_name "studyName";
String comment "Cruise name";
String ioos_category "Identifier";
String long_name "Cruise Name";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 6.8947416e+8, 1.48602336e+9;
String axis "T";
String calendar "proleptic_gregorian";
String column_name "col_5336";
String comment "Date and time (UTC)";
String ioos_category "Time";
String long_name "Datetime UTC";
String lter_mscale "dateTime";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range -70.088, -58.248;
String axis "Y";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String column_name "col_5340";
String comment "Latitude for CTD cast location";
String ioos_category "Location";
String long_name "Latitude";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "º";
String lter_units_string "degree";
String standard_name "latitude";
String units "degrees_north";
String units_conventions "EML-2.0.1,EML-2.1.0,EML-LTER";
}
longitude {
String _CoordinateAxisType "Lon";
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range -80.0, -60.04;
String axis "X";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String column_name "col_5341";
String comment "Longitude for CTD cast location";
String ioos_category "Location";
String long_name "Longitude";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "º";
String lter_units_string "degree";
String standard_name "longitude";
String units "degrees_east";
String units_conventions "EML-2.0.1,EML-2.1.0,EML-LTER";
}
depth {
String _CoordinateAxisType "Height";
String _CoordinateZisPositive "down";
Float64 _FillValue -9.969209968386869e+36;
Float64 actual_range 0.0, 3653.09;
String axis "Z";
Float64 colorBarMaximum 0.0;
Float64 colorBarMinimum -4000.0;
String colorBarPalette "TopographyDepth";
String column_name "col_5346";
String comment "Depth";
String ioos_category "Location";
String long_name "Depth";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "m";
String lter_units_string "meter";
String positive "down";
String reference_datum "sea-surface";
String standard_name "depth";
String units "m";
String units_conventions "AND-LTER,BNZ-LTER,CDR-LTER,EML-2.0.1,EML-2.1.0,EML-LTER,LUQ-LTER,SGS-LTER";
}
pressure {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 0.0, 3722.0;
Float64 colorBarMaximum 4000.0;
Float64 colorBarMinimum 0.0;
String column_name "col_5342";
String comment "Pressure";
String ioos_category "Pressure";
String long_name "Pressure";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "dbar";
String lter_units_string "decibar";
String positive "down";
String reference_datum "sea-surface";
String standard_name "sea_water_pressure";
String units "dbar";
String units_conventions "PAL-LTER";
}
temperature {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range -1.865, 4.375;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum -5.0;
String column_name "col_5343";
String comment "Temperature";
String ioos_category "Temperature";
String long_name "Temperature";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "C";
String lter_units_string "celsius";
String standard_name "sea_water_temperature";
String units "degree_C";
String units_conventions "AND-LTER,BNZ-LTER,EML-2.0.1,EML-2.1.0,EML-LTER,LUQ-LTER,SGS-LTER";
}
salinity {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 29.899, 79.919;
Float64 colorBarMaximum 37.0;
Float64 colorBarMinimum 32.0;
String column_name "col_5344";
String comment "Salinity";
String ioos_category "Salinity";
String long_name "Salinity";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "PSU";
String lter_units_string "practicalSalinityUnit";
String standard_name "sea_water_practical_salinity";
String units "1";
String units_conventions "MCM-LTER,PAL-LTER";
}
sigmat {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 24.001, 63.681;
Float64 colorBarMaximum 200.0;
Float64 colorBarMinimum 0.0;
String column_name "col_5345";
String comment "Sigma t (Density - 1000 kg m-3)";
String ioos_category "Physical Oceanography";
String long_name "Sigma-Theta";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "kg/m³";
String lter_units_string "kilogramPerMeterCubed";
String standard_name "sea_water_sigma_t";
String units "kg m-3";
String units_conventions "EML-LTER";
}
chlorophyll_a {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 0.0, 1459.1;
Float64 colorBarMaximum 30.0;
Float64 colorBarMinimum 0.03;
String colorBarScale "Log";
String column_name "col_5347";
String comment "Fluorescence";
String ioos_category "Ocean Color";
String long_name "Fluorescence";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "mg/m³";
String lter_units_string "milligramPerMeterCubed";
String standard_name "mass_concentration_of_chlorophyll_a_in_sea_water";
String units "mg m-3";
String units_conventions "EML-LTER";
}
transmissivity {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 0.0, 100.0;
String column_name "col_5348";
String comment "Beam Transmission";
String ioos_category "Optical Properties";
String long_name "Beam Transmission";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "%";
String lter_units_string "percent";
String units_conventions "BNZ-LTER,CAP-LTER,CDR-LTER,FCE-LTER,GCE-LTER,HBR-LTER,KNZ-LTER,MCM-LTER,NTL-LTER,NWT-LTER,PAL-LTER,PIE-LTER,SGS-LTER";
}
event {
Int16 _FillValue 32767;
Int16 actual_range 1, 1352;
String cf_role "profile_id";
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
String column_name "col_5337";
String comment "Sequential number assigned to sampling events aboard cruise";
String ioos_category "Identifier";
String long_name "Event Number";
String lter_mscale "nominal";
String units_conventions "EML-2.0.1,EML-2.1.0,EML-LTER";
}
grid_line {
Float64 _FillValue NaN;
Float64 actual_range -208.43, 1137.64;
String column_name "col_5338";
String comment "PAL LTER sampling grid line";
String ioos_category "Unknown";
String long_name "Grid Line";
String lter_mscale "nominal";
}
grid_station {
Float64 _FillValue NaN;
Float64 actual_range -90.76, 556.3;
String column_name "col_5339";
String comment "PAL LTER sampling grid station";
String ioos_category "Unknown";
String long_name "Grid Line Station";
String lter_mscale "nominal";
}
}
NC_GLOBAL {
String _NCProperties "version=1|netcdflibversion=4.6.1|hdf5libversion=1.10.6";
String acknowledgement "Funding and support provided by the National Science Foundation";
String cdm_data_type "TrajectoryProfile";
String cdm_profile_variables "event,time,latitude,longitude";
String cdm_trajectory_variables "study_name";
String comment "The Palmer, Antarctica, Long-Term Ecological Research project is a member site of the Long-Term Ecological Research program, a network of sites investigating diverse biomes. A team of researchers seeks to understand the structure and function of the Western Antarctic Peninsula's marine and terrestrial ecosystems in the context of seasonal-to-interannual atmospheric and sea ice dynamics, as well as long-term climate change. The PAL measurement system (or grid) is designed to study marine and terrestrial food webs consisting principally of diatom primary producers, the dominant herbivore Antarctic krill, and the apex predator Adelie penguin. An attenuated microbial food web is also a focus. PAL studies these ecosystems annually over a regional scale grid of oceanographic stations and seasonally at Palmer Station. \\n\\nPalmer Station is located on Anvers Island west of the Antarctic Peninula. The peninsula runs perpendicular to a strong climatic gradient between the cold, dry continental regime to the south, characteristic of the Antarctic interior, and the warm, moist, maritime regime to the north. North-south shifts in the gradient give rise to large environmental variability to climate change. Sea ice extent and variability affects ecosystem changes at all trophic levels. In addition to the long-term field and research activities, information management, graduate student training, education and outreach are an integral part of the program.";
String contributor_role_vocabulary "https://vocab.nerc.ac.uk/collection/G04/current/";
String Conventions "CF-1.8, ACDD-1.3, COARDS";
String creator_country "USA";
String creator_email "kerfoot@marine.rutgers.edu";
String creator_institution "Rutgers University";
String creator_name "John Kerfoot";
String creator_sector "academic";
String creator_type "person";
String creator_url "https://rucool.marine.rutgers.edu";
String datazoo_datatable_id "273";
String datazoo_datatable_label "CTD Downcast Data (Cruise)";
String date_created "2021-03-18T21:18:00Z";
String date_issued "2021-03-18T21:18:00Z";
String defaultDataQuery "null";
String defaultGraphQuery "longitude,latitude&.draw=markers&.marker=6%7C5&.color=0x000000&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff&.yRange=%7C0%7Ctrue%7C";
Float64 Easternmost_Easting -60.04;
String featureType "TrajectoryProfile";
String geospatial_bounds_crs "EPSG:4326";
String geospatial_bounds_vertical_crs "EPSG:5831";
Float64 geospatial_lat_max -58.248;
Float64 geospatial_lat_min -70.088;
String geospatial_lat_resolution "0.00001 degree";
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -60.04;
Float64 geospatial_lon_min -80.0;
String geospatial_lon_resolution "0.00001 degree";
String geospatial_lon_units "degrees_east";
Float64 geospatial_vertical_max 3653.09;
Float64 geospatial_vertical_min 0.0;
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String history
"local files
2025-05-04T13:51:43Z (local files)
2025-05-04T13:51:43Z http://pallter-data.marine.rutgers.edu/erddap/tabledap/CruiseCTDProfiles.html";
String infoUrl "https://pal.lternet.edu/";
String institution "National Science Foundation";
String instrument_vocabulary "NASA/GCMD Instrument Keywords Version 8.5";
String keywords "annual, available, beam, binned, chemistry, chlorophyll, chlorophyll_a, col_5348, color, concentration, conductivity, cruise, cruises, ctd, data, datetime, density, depth, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Pressure > Water Pressure, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Density, Earth Science > Oceans > Salinity/Density > Salinity, event, fluorescence, grid, grid_line, grid_station, identifier, index, latitude, line, longitude, lter, mass, mass_concentration_of_chlorophyll_a_in_sea_water, name, number, ocean, ocean color, oceanography, oceans, ongoing, optical, optical properties, pal, par, photosynthetically, physical, physical oceanography, practical, pressure, profile, properties, radiation, rutgers, salinity, science, sea, sea_water_practical_salinity, sea_water_pressure, sea_water_sigma_t, sea_water_temperature, seawater, sensor, sigma, sigma-theta, sigmat, sonde, station, study_name, temperature, theta, time, transmission, university, water";
String keywords_vocabulary "GCMD Science Keywords";
String license "All data contained herein is licensed under the LTER Network Data Access Policy (https://lternet.edu/data-access-policy/). In accordance with scientific publishing conventions and professional etiquette, the consumer of these data (the \"Data User\") is expected to appropriately cite these data in any publication that results from their use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur and should realize that misinterpretation of data may occur if used out of context of the original study. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the data authors. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available \"as is.\" The Data User should be aware that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data.";
String license_link "https://lternet.edu/data-access-policy/";
String naming_authority "edu.rutgers.rucool";
Float64 Northernmost_Northing -58.248;
String platform_vocabulary "NASA/GCMD Platforms Keywords Version 8.5";
String product_version "1.0";
String program "LTER";
String project "Palmer LTER";
String publisher_country "USA";
String publisher_email "kerfoot@marine.rutgers.edu";
String publisher_institution "Rutgers University";
String publisher_name "John Kerfoot";
String publisher_type "person";
String publisher_url "https://rucool.marine.rutgers.edu";
String references "https://pal.lternet.edu/";
String sea_name "Southern Ocean";
String source "local files";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -70.088;
String standard_name_vocabulary "CF Standard Name Table v77";
String subsetVariables "study_name,grid_line,grid_station";
String summary "Conductivity Temperature Depth (CTD) sensor profile data binned by depth from PAL LTER annual cruises, 1991 - 2017 (ongoing). Since 1991 (and ongoing), the PAL LTER program has deployed a SeaBird 911+ CTD mounted on a 24-bottle rosette during annual (Austral Summer) cruises plus a few supplemental cruises at other times of the year. An equal area grid oriented parallel to the average coast provides the basis for sampling, as well as specific process studies and on-the-fly scientific needs. The CTD-rosette is lowered into the ocean (usually to just above the sea-floor) using the ship's conductive-wire winch. Data is collected and displayed real-time to ensure quality and make decisions about where to collect seawater with the bottles. Bottle data is typically collected extensively in the seasaonal mixed layer and pycnocline, plus at Tmin, in the permament pycnolcine and at Tmax and Smax, as well as near the bottom. Bottle data allows measurement adn calculation of additional variables and helps ensure quality data collected via sensors. Sensors include: Pressure, Conductivity (for Salinity), Temperature, Oxygen, Transmissometer, Flourometer, Photosynthetically Available Radiation (PAR/Irrandiance). Additional Bottle Data Variables include: Phosphate, Silicate, Nitrite, Nitrate, Ammonium. After each cruise, Temperature, Conductivity and Oxygen sensors are calibrated and post-crusie processing is applied, making use of pre- and post- cruise calibrations as well as SeaBird software and algorithms for getting the best quality data. Each profile is then inspected for any issues and if needed, suitable corrections are made such as using secondary sensors (temperature, conductivity and oxygen all currently measured in duplicate), using the upcast, or flagging the data as bad.";
String time_coverage_end "2017-02-02T08:16:00Z";
String time_coverage_start "1991-11-07T00:36:00Z";
String title "Conductivity Temperature Depth (CTD) sensor profile data binned by depth from PAL LTER annual cruises, 1991, 2017 (ongoing).";
Float64 Westernmost_Easting -80.0;
}
}
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.