Easier access to scientific data
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ERDDAP
Easier access to scientific data |
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Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | GLRC Met Tower and Sonde Data
|
| Institution: | Michigan Technological University (Dataset ID: obs_669_latest) |
| Range: | longitude = -88.54533 to -88.54533°E, latitude = 47.12058 to 47.12058°N, time = 2026-04-19T00:00:02Z to 2026-04-25T13:00:02Z |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Data Access Form
| Files
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![[The graph you specified. Please be patient.]](https://seagull-erddap.glos.org/erddap/tabledap/obs_669_latest.png?longitude,latitude,air_pressure&time%3E=2026-04-19T00%3A00%3A00Z&time%3C=2026-04-26T00%3A00%3A00Z&.draw=markers&.marker=5%7C5&.color=0x000000&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff)
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Attributes {
s {
time {
UInt32 _ChunkSizes 512;
String _CoordinateAxisType "Time";
Float64 actual_range 1.776556802e+9, 1.777122002e+9;
String axis "T";
String calendar "gregorian";
String gts_ingest "true";
String ioos_category "Time";
String long_name "Time";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
longitude {
String _CoordinateAxisType "Lon";
Float64 _FillValue -9999.0;
Float64 actual_range -88.545326, -88.545326;
String axis "X";
String comment "Longitude given by data provider for this platform dataset";
String gts_ingest "true";
String ioos_category "Location";
String long_name "Longitude";
String standard_name "longitude";
String units "degrees_east";
Float64 valid_max 180.0;
Float64 valid_min -180.0;
}
latitude {
String _CoordinateAxisType "Lat";
Float64 _FillValue -9999.0;
Float64 actual_range 47.12058, 47.12058;
String axis "Y";
String comment "Latitude given by data provider for this platform dataset";
String gts_ingest "true";
String ioos_category "Location";
String long_name "Latitude";
String standard_name "latitude";
String units "degrees_north";
Float64 valid_max 90.0;
Float64 valid_min -90.0;
}
air_pressure {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 100268.0, 102777.0;
String axis "T";
String comment "Air or atmospheric pressure is the pressure exerted by overlying air. (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Pressure";
String long_name "Air pressure";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "air_pressure";
String units "Pa";
}
air_temperature {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 267.228, 290.213;
String axis "T";
String comment "Air temperature is the temperature of air in situ. (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Temperature";
String long_name "Air temperature";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "air_temperature";
String units "K";
}
battery_voltage {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 12.0078, 12.1113;
String axis "T";
String comment "Battery voltage of a sensor system or datalogger that is recorded as an indicator of sensor health and data reliability. (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Unknown";
String long_name "battery_voltage";
Float64 missing_value -999.0;
String platform "platform";
String units "V";
}
chlorophyll_fluorescence {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 0.31, 0.616667;
String axis "T";
String comment "Chlorophyll is the green pigment in plants and algae. Chlorophyll measurements are used to determine how much algae is in the water. (USGS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Unknown";
String long_name "chlorophyll_fluorescence";
Float64 missing_value -999.0;
String platform "platform";
String units "RFU";
}
fluorescent_dissolved_organic_matter {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 12.3217, 13.8933;
String axis "T";
String comment "FDOM refers to the fluorescent fraction of colored DOM (referred to as CDOM fluorescence or FDOM) (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Unknown";
String long_name "fluorescent_dissolved_organic_matter";
Float64 missing_value -999.0;
String platform "platform";
String units "RFU";
}
fractional_saturation_of_oxygen_in_sea_water {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 87.6667, 100.023;
String axis "T";
String comment "Dissolved oxygen (DO) saturation is DO concentration relative to DO saturation levels at the same temperature and salinity in a water sample. (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Dissolved O2";
String long_name "Dissolved oxygen saturation";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "fractional_saturation_of_oxygen_in_sea_water";
String units "1";
}
lwe_precipitation_rate {
String ioos_category "Unknown";
String platform "platform";
String standard_name "lwe_precipitation_rate";
String units "m s-1";
}
mass_concentration_of_chlorophyll_in_sea_water {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 1.145e-6, 2.27333e-6;
String axis "T";
String comment "Chlorophyll is the green pigment found in plants and algae. Chlorophyll measurements are used to determine how much algae is in the water. (USGS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Unknown";
String long_name "Chlorophyll concentration";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "mass_concentration_of_chlorophyll_in_sea_water";
String units "kg m-3";
}
mass_concentration_of_oxygen_in_sea_water {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 0.0119517, 0.0137483;
String axis "T";
String comment "Dissolved oxygen (DO) refers to the concentration of oxygen gas incorporated in water. (EPA)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Dissolved O2";
String long_name "Dissolved oxygen";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "mass_concentration_of_oxygen_in_sea_water";
String units "kg m-3";
}
phycocyanin_fluorescence {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 1.235, 1.42333;
String axis "T";
String comment "Phycocyanin is a pigment found in cyanobacteria that is measured in freshwater environments. The phycocyanin measurement is used as a field screening for cyanobacteria and cyanobacteria blooms, also called blue green algae. (EPA)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Unknown";
String long_name "phycocyanin_fluorescence";
Float64 missing_value -999.0;
String platform "platform";
String units "RFU";
}
relative_humidity {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 23.7327, 90.2122;
String axis "T";
String comment "Relative humidity is the amount of moisture in the air as vapor relative to how much it can possibly hold at the same temperature. (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Meteorology";
String long_name "Relative humidity";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "relative_humidity";
String units "1";
}
sea_water_electrical_conductivity {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 0.00629267, 0.007496;
String axis "T";
String comment "Conductivity is the ability of a material to pass an electrical current. It is the inverse of resistance. In water, it is a proxy from which salinity is derived for water quality or to further derive water density. (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Salinity";
String long_name "Conductivity";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "sea_water_electrical_conductivity";
String units "S m-1";
}
sea_water_electrical_conductivity_at_reference_temperature {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 0.011323, 0.0133097;
String axis "T";
String comment "Conductivity is the ability of a material to pass an electrical current. Conductivity can be corrected to a reference temperature. When this reference temperature is 25 degrees Celsius it is often referred to as 'specific conductivity'.";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Unknown";
String long_name "Specific Conductivity";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "sea_water_electrical_conductivity_at_reference_temperature";
String units "Unknown";
}
sea_water_ph_reported_on_total_scale {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 7.36667, 7.65;
String axis "T";
String comment "pH is a measure of the acidity or alkalinity of the seawater. (NOAA)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Unknown";
String long_name "pH";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "sea_water_ph_reported_on_total_scale";
String units "1";
}
sea_water_turbidity {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 4.01167, 8.66833;
String axis "T";
String comment "Turbidity is a measure of light scattering due to suspended material in water. It is a measure of the cloudiness of water. (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Total Suspended Matter";
String long_name "Turbidity";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "sea_water_turbidity";
String units "1";
}
surface_downwelling_shortwave_flux_in_air {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 0.0, 978.924;
String axis "T";
String comment "Downwelling radiation is radiation from above. Shortwave is a term used to describe the radiant energy emitted by the sun in the visible and near-ultraviolet wavelengths. A radiative flux is sometimes referred to as 'irradiance.'";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Optical Properties";
String long_name "Incident solar radiation (downwelling, shortwave)";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "surface_downwelling_shortwave_flux_in_air";
String units "W m-2";
}
total_suspended_solids {
String ioos_category "Unknown";
String long_name "total_suspended_solids";
String platform "platform";
String units "mg L-1";
}
wind_from_direction {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 0.0, 357.1;
String axis "T";
String comment " Wind direction is the direction from which wind is blowing. It is a meteorological convention (degrees clockwise from North). (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Wind";
String long_name "Wind direction (from)";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "wind_from_direction";
String units "degree";
}
wind_speed {
UInt32 _ChunkSizes 1, 1;
Float64 _FillValue -999.0;
Float64 actual_range 0.0, 12.0;
String axis "T";
String comment "Wind speed is the magnitude of wind velocity. Wind is motion of air relative to the surface of the earth. (IOOS)";
String coordinates "time latitude longitude depth";
String coverage_content_type "physicalMeasurement";
String instrument "instrument0";
String ioos_category "Wind";
String long_name "Wind speed";
Float64 missing_value -999.0;
String platform "platform";
String standard_name "wind_speed";
String units "m s-1";
}
platform {
String _Unsigned "false";
String cf_role "timeseries_id";
String ioos_category "Unknown";
}
}
NC_GLOBAL {
String _NCProperties "version=2,netcdf=4.9.3,hdf5=1.14.6";
String acknowledgement "Thanks to Mathew Biddle, Tim Boyer, and the NCEI NetCDF working group for guidance";
String cdm_data_type "TimeSeries";
String cdm_timeseries_variables "platform,longitude,latitude";
String comment "These data were automatically archived by GLOS' Seagull Platform. Contact GLOS with questions or concerns.";
String contributor_name "Michigan Technological University";
String contributor_role "Ocean Observing System Contributor";
String Conventions "COARDS,CF-1.7,IOOS-1.2,ACDD-1.3";
String creator_country "USA";
String creator_email "hmhender@mtu.edu";
String creator_institution "Michigan Technological University";
String creator_name "Michigan Technological University";
String creator_sector "academic";
String creator_type "group";
String creator_url "https://www.mtu.edu/greatlakes";
String date_created "2026-04-25T13:02:50.454714Z";
String date_issued "2026-04-25T13:02:50.454738Z";
String date_metadata_modified "2026-04-25T13:02:50.454734Z";
String date_modified "2026-04-25T13:02:50.454730Z";
Float64 Easternmost_Easting -88.545326;
String featureType "TimeSeries";
String geospatial_bounds "POINT (-88.545326 47.120580)";
String geospatial_bounds_crs "EPSG:4326";
String geospatial_bounds_vertical_crs "EPSG:5829";
Float64 geospatial_lat_max 47.12058;
Float64 geospatial_lat_min 47.12058;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -88.545326;
Float64 geospatial_lon_min -88.545326;
String geospatial_lon_units "degrees_east";
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String gts_ingest "true";
String history
"These data were automatically archived by GLOS' Seagull Platform. Corrections to data may periodically occur. Contact GLOS with questions or concerns.
2026-04-25T13:14:42Z (local database)
2026-04-25T13:14:42Z https://seagull-erddap.glos.org/tabledap/obs_669_latest.das";
String id "obs_669_latest";
String infoUrl "https://www.mtu.edu/greatlakes";
String institution "Michigan Technological University";
String instrument_vocabulary "Uniform Resource Name (URN)";
String keywords "(downwelling, (fdom), (from), Air, air, at, Battery, battery, Chlorophyll, chlorophyll, concentration, Conductivity, conductivity, direction, Dissolved, dissolved, downwelling, electrical, fluorescence, Fluorescent, fluorescent, flux, fractional, from, humidity, in, Incident, lwe, mass, matter, of, on, organic, oxygen, pH, ph, Phycocyanin, phycocyanin, Precipitation, precipitation, pressure, radiation, rate, reference, Relative, relative, reported, saturation, scale, sea, shortwave, shortwave), solar, solids, Specific, speed, surface, suspended, temperature, Total, total, Turbidity, turbidity, voltage, water, Wind, wind";
String keywords_vocabulary "GCMD Science Keywords";
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, GLOS, 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.";
String metadata_link "https://www.ncei.noaa.gov/data/oceans/ncei/formats/netcdf/v2.0/";
String naming_authority "org.glos";
String ncei_template_version "NCEI_NetCDF_TimeSeries_Orthogonal_Template_v2.0";
Float64 Northernmost_Northing 47.12058;
String platform "fixed";
String platform_name "GLRC Observatory";
String platform_type "fixed";
String platform_vocabulary "http://mmisw.org/ont/ioos/platform";
String processing_level "Not Applicable";
String product_version "v1";
String program "NCEI-IOOS-GLOS Data Pipeline";
String project "NCEI-IOOS-GLOS Data Pipeline";
String publisher_country "United States";
String publisher_email "info@glos.org";
String publisher_institution "GLOS";
String publisher_name "GLOS Cyberinfrastructure Engineer";
String publisher_type "position";
String publisher_url "https://glos.org";
String references "https://www.ncei.noaa.gov/data/oceans/ncei/formats/netcdf/v2.0/";
String sea_name "Great Lakes";
String source "GLOS Seagull";
String sourceUrl "(local database)";
Float64 Southernmost_Northing 47.12058;
String standard_name_vocabulary "CF Standard Name Table v77";
String summary
"The Great Lakes Research Center Meteorological Station, GLRCMET, has been refurbished and relocated from its previous rooftop installation to the end of the GLRC pier, providing a more representative and unobstructed measurement location over the Portage Waterway. In addition to standard meteorological measurements, the station has been expanded to include an in situ water quality sonde. This system measures critical parameters within the highly dynamic Portage Waterway, including temperature, conductivity, dissolved oxygen, and other biogeochemical indicators. The site is uniquely positioned within a bidirectional flow regime, where water exchange with Lake Superior can occur from both the north and the south entries depending on seiche activity, wind forcing, and broader lake conditions. Together, these observations provide a valuable, co-located atmospheric and aquatic dataset, supporting research on air–water interactions, circulation dynamics, and water quality variability in a complex and understudied coastal system.
Funding for the station’s refurbishment and long-term operation is provided by GLOS.";
String time_coverage_duration "PT1M";
String time_coverage_end "2026-04-25T13:00:02Z";
String time_coverage_resolution "PT1200S";
String time_coverage_start "2026-04-19T00:00:02Z";
String title "GLRC Met Tower and Sonde Data";
String uuid "TBD";
Float64 Westernmost_Easting -88.545326;
String wmo_platform_code "GRCM4";
}
}
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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,
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constraints (e.g., variable<value),
each preceded by '&' (which is interpreted as "AND").
For details, see the tabledap Documentation.