The Pacific Marine Environmental Laboratory's ERDDAP data server for public access to scientific data
NOAA OAR PMEL
|
Easy Access to PMEL Scientific Data
The Pacific Marine Environmental Laboratory's ERDDAP data server for public access to scientific data |
NOAA OAR PMEL |
| Dataset Title: | PMEL Atmospheric Chemistry ACE-1 Aerosol Main Data, 1 min data
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| Institution: | NOAA (Dataset ID: ACG_ACE-1_Discoverer_main) |
| Range: | longitude = 134.996 to 229.595°E, latitude = -54.51 to 44.484°N, altitude = 18.0 to 18.0m, time = 1995-10-13T17:45:00Z to 1995-12-12T22:45:00Z |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Data Access Form
| Files
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Attributes {
s {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 8.136063e+8, 8.188083e+8;
String axis "T";
String comment "Start of sampling period";
String coords "time";
String ioos_category "Time";
String long_name "Datetime UTC";
String source_name "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";
}
trajectory_id {
String cf_role "trajectory_id";
String coords "time";
String ioos_category "Identifier";
String long_name "Trajectory ID";
}
duration {
Int32 _FillValue 2147483647;
Int32 actual_range 1800, 1800;
String coords "time";
String ioos_category "Time";
String long_name "Duration";
String units "second";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 actual_range -54.51, 44.484;
String axis "Y";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String coords "time";
String instrument "GPS";
String ioos_category "Location";
String long_name "Latitude";
String source "surface observation";
String standard_name "latitude";
String units "degrees_north";
Float64 valid_max 90.0;
Float64 valid_min -90.0;
}
longitude {
String _CoordinateAxisType "Lon";
Float64 actual_range 134.996, 229.595;
String axis "X";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String coords "time";
String instrument "GPS";
String ioos_category "Location";
String long_name "Longitude";
String source "surface observation";
String standard_name "longitude";
String units "degrees_east";
Float64 valid_max 180.0;
Float64 valid_min -180.0;
}
altitude {
String _CoordinateAxisType "Height";
String _CoordinateZisPositive "up";
Float64 actual_range 18.0, 18.0;
String axis "Z";
Float64 colorBarMinimum 0.0;
String coords "time";
String ioos_category "Location";
String long_name "height above mean sea level";
String positive "up";
String standard_name "altitude";
String units "m";
Float64 valid_min 0.0;
}
ship_speed {
Float64 _FillValue NaN;
Float64 actual_range 0.3, 17.2;
Float64 colorBarMaximum 25.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "GPS";
String ioos_category "Unknown";
String long_name "Ship Speed over Ground";
String source "surface observation";
String standard_name "platform_speed_wrt_ground";
String units "knots";
Float64 valid_max 20.0;
Float64 valid_min 0.0;
}
ship_course {
Float64 _FillValue NaN;
Float64 actual_range 0.0, 360.0;
Float64 colorBarMaximum 400.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "GPS";
String ioos_category "Unknown";
String long_name "Ship Course over Ground";
String source "surface observation";
String standard_name "platform_course";
String units "degree";
Float64 valid_max 360.0;
Float64 valid_min 0.0;
}
air_temp {
Float64 _FillValue NaN;
Float64 actual_range -0.2, 28.5;
Float64 colorBarMaximum 40.0;
Float64 colorBarMinimum -10.0;
String coords "time";
String instrument "Ship and PMEL sensor";
String ioos_category "Temperature";
String long_name "Air Temperature";
String source "surface observation";
String standard_name "air_temperature";
String units "degree_C";
Float64 valid_max 50.0;
Float64 valid_min -20.0;
}
rh {
Float64 _FillValue NaN;
Float64 actual_range 49.0, 103.5;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Ship and PMEL Sensors";
String ioos_category "Meteorology";
String long_name "Relative Humidity";
String source "surface observation";
String standard_name "relative_humidity";
String units "percent";
Float64 valid_max 110.0;
Float64 valid_min 0.0;
}
baro_pressure {
Float64 _FillValue NaN;
Float64 actual_range 982.06, 1026.48;
Float64 colorBarMaximum 1050.0;
Float64 colorBarMinimum 950.0;
String coords "time";
String instrument "SHIP and PMEL sensors";
String ioos_category "Pressure";
String long_name "Barometric Pressure";
String source "surface observation";
String standard_name "air_pressure";
String units "hPa";
Float64 valid_max 1050.0;
Float64 valid_min 950.0;
}
insolation {
Float64 _FillValue NaN;
Float64 actual_range 1.0, 1067.0;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum -10.0;
String coords "time";
String instrument "Epply radiometer 8-48";
String ioos_category "Heat Flux";
String long_name "Shortwave Flux";
String source "surface observation";
String standard_name "diffuse_downwelling_shortwave_flux_in_air";
String units "W m-2";
Float64 valid_max 1500.0;
Float64 valid_min -10.0;
}
rain_rate {
Float64 _FillValue NaN;
Float64 actual_range 0.0, 70.5;
Float64 colorBarMaximum 1.0e-4;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "PEML Vaisala WX520 Precipitation Sensor";
String ioos_category "Meteorology";
String long_name "Rain Rate";
String source "surface observation";
String standard_name "rainfall_rate";
String units "MM' 'Hour-1";
Float64 valid_max 200.0;
Float64 valid_min 0.0;
}
wind_speed {
Float64 _FillValue NaN;
Float64 actual_range 0.2, 21.8;
Float64 colorBarMaximum 15.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Ship SSSSG IMET wind";
String ioos_category "Wind";
String long_name "Wind Speed";
String source "surface observation";
String standard_name "wind_speed";
String units "m s-1";
Float64 valid_max 50.0;
Float64 valid_min 0.0;
}
wind_direction {
Float64 _FillValue NaN;
Float64 actual_range 0.0, 360.0;
Float64 colorBarMaximum 360.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Ship SSSSG IMET wind";
String ioos_category "Wind";
String long_name "Wind Direction";
String source "surface observation";
String standard_name "wind_from_direction";
String units "degree";
Float64 valid_max 360.0;
Float64 valid_min 0.0;
}
wind_u {
Float64 _FillValue NaN;
Float64 actual_range -15.1, 16.2;
Float64 colorBarMaximum 15.0;
Float64 colorBarMinimum -15.0;
String coords "time";
String instrument "Wind to East: Ship SSSSG IMET wind";
String ioos_category "Wind";
String long_name "east component of the wind";
String source "surface observation";
String standard_name "eastward_wind";
String units "m s-1";
Float64 valid_max 50.0;
Float64 valid_min 0.0;
}
wind_v {
Float64 _FillValue NaN;
Float64 actual_range -17.7, 19.7;
Float64 colorBarMaximum 15.0;
Float64 colorBarMinimum -15.0;
String coords "time";
String instrument "Wind to North: Ship SSSG IMET wind";
String ioos_category "Wind";
String long_name "north component of the wind";
String source "surface observation";
String standard_name "northward_wind";
String units "m s-1";
Float64 valid_max 50.0;
Float64 valid_min 0.0;
}
relative_wind_speed {
Float64 _FillValue NaN;
Float64 actual_range 0.0, 22.7;
Float64 colorBarMaximum 15.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "PMEL WX520 anamometer and ship WX520 anamometer";
String ioos_category "Wind";
String long_name "Wind Speed Relative to Ship";
String source "surface observation";
String standard_name "wind_speed";
String units "m s-1";
Float64 valid_max 50.0;
Float64 valid_min 0.0;
}
relative_wind_direction {
Float64 _FillValue NaN;
Float64 actual_range -180.0, 180.0;
Float64 colorBarMaximum 360.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "PMEL WX520 anamometer and ship WX520 anamometer";
String ioos_category "Wind";
String long_name "Wind Direction Relative to Ship";
String source "surface observation";
String standard_name "wind_from_direction";
String units "degree";
Float64 valid_max 180.0;
Float64 valid_min -180.0;
}
ufcn {
Float64 _FillValue NaN;
Float64 actual_range 68.0, 5292.0;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "TSI 3785 and TSI 3025A";
String ioos_category "Statistics";
String long_name "Ultrafine particle number concentration";
String source "surface observation";
String standard_name "number_concentration_of_aerosol_particles_at_stp_in_air";
String units "cm-3";
Float64 valid_max 1200000.0;
Float64 valid_min 0.0;
}
sea_surface_temperature {
Float64 _FillValue NaN;
Float64 actual_range 3.85, 29.03;
Float64 colorBarMaximum 32.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Ship Thermosalinograph";
String ioos_category "Temperature";
String long_name "Sea Surface Temperature";
String source "surface ocean observation";
String standard_name "sea_surface_temperature";
String units "degree_C";
Float64 valid_max 45.0;
Float64 valid_min -10.0;
}
salinity {
Float64 _FillValue NaN;
Float64 actual_range 32.17, 35.89;
Float64 colorBarMaximum 37.0;
Float64 colorBarMinimum 32.0;
String coords "time";
String instrument "Ship Thermosalinograph";
String ioos_category "Salinity";
String long_name "Sea Surface Salinity";
String source "surface ocean observation";
String standard_name "sea_water_practical_salinity";
String units "PSU";
Float64 valid_max 45.0;
Float64 valid_min 0.0;
}
ozone {
Float64 _FillValue NaN;
Float64 actual_range 6.28, 40.75;
Float64 colorBarMaximum 1.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "TECO 49C";
String ioos_category "Contaminants";
String long_name "Ozone Mixing Ratio";
String source "surface observation";
String standard_name "mole_fraction_of_ozone_in_air";
String units "ppb";
Float64 valid_max 200.0;
Float64 valid_min 0.0;
}
scatter_450_sub1 {
Float64 _FillValue NaN;
Float64 colorBarMaximum 500.0;
Float64 colorBarMinimum -500.0;
String coords "time";
String instrument "TSI Model 3563 Nephelometer";
String ioos_category "Optical Properties";
String long_name "Aerosol light scattering coefficient for Dp < 1.1 um at 450 nm, Mm-1";
String source "surface observation";
String standard_name "volume_scattering_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "MM-1";
Float64 valid_max 10000.0;
Float64 valid_min 0.0;
}
scatter_550_sub1 {
Float64 _FillValue NaN;
Float64 colorBarMaximum 500.0;
Float64 colorBarMinimum -500.0;
String coords "time";
String instrument "TSI Model 3563 Nephelometer";
String ioos_category "Optical Properties";
String long_name "Aerosol light scattering coefficient for Dp < 1.1 um at 550 nm, Mm-1";
String source "surface observation";
String standard_name "volume_scattering_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "MM-1";
Float64 valid_max 1000.0;
Float64 valid_min 0.0;
}
scatter_700_sub1 {
Float64 _FillValue NaN;
Float64 colorBarMaximum 500.0;
Float64 colorBarMinimum -500.0;
String coords "time";
String instrument "TSI Model 3563 Nephelometer";
String ioos_category "Optical Properties";
String long_name "Aerosol light scattering coefficient for Dp < 1.1 um at 700 nm, Mm-1";
String source "surface observation";
String standard_name "volume_scattering_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "MM-1";
Float64 valid_max 10000.0;
Float64 valid_min 0.0;
}
scatter_450_sub10 {
Float64 _FillValue NaN;
Float64 colorBarMaximum 500.0;
Float64 colorBarMinimum -500.0;
String coords "time";
String instrument "TSI Model 3563 Nephelometer";
String ioos_category "Optical Properties";
String long_name "Aerosol light scattering coefficient for Dp < 10 um at 450 nm, Mm-1";
String source "surface observation";
String standard_name "volume_scattering_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "MM-1";
Float64 valid_max 800.0;
Float64 valid_min 0.0;
}
scatter_550_sub10 {
Float64 _FillValue NaN;
Float64 colorBarMaximum 500.0;
Float64 colorBarMinimum -500.0;
String coords "time";
String instrument "TSI Model 3563 Nephelometer";
String ioos_category "Optical Properties";
String long_name "Aerosol light scattering coefficient for Dp < 10 um at 550 nm, Mm-1";
String source "surface observation";
String standard_name "volume_scattering_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "MM-1";
Float64 valid_max 250.0;
Float64 valid_min 0.0;
}
scatter_700_sub10 {
Float64 _FillValue NaN;
Float64 colorBarMaximum 500.0;
Float64 colorBarMinimum -500.0;
String coords "time";
String instrument "TSI Model 3563 Nephelometer";
String ioos_category "Optical Properties";
String long_name "Aerosol light scattering coefficient for Dp < 10 um at 700 nm, Mm-1";
String source "surface observation";
String standard_name "volume_scattering_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "MM-1";
Float64 valid_max 250.0;
Float64 valid_min 0.0;
}
}
NC_GLOBAL {
String cdm_data_type "Trajectory";
String cdm_trajectory_variables "trajectory_id";
String comment
"Ship's speed and heading:
The heading (compass degrees) was taken from the ship's gyro which was recorded by the Discoverer's SCS system. For the times when the SCS system was not working, the heading was taken from the PMEL GPS course. The GPS course and the gyro heading usually agreed within several degrees as long as the ship was moving forward through the water at speeds above 5 knots. The ship's speed (knots) was taken from the PMEL GPS system. Both the speed and heading were averaged from the one minute data to make the 30 minute averages. The speed was averaged directly, the heading was separated into N and E components by taking the sin and cos respectively of the heading. After averaging the N and E components into 30 minute bins, the heading was recalculated using a 4 quadrant arctangent function.
Atmospheric Temperature and Humidity:
Air temperature and humidity were measured with the ship's RM Young sensor. The sensor was enclosed in an RM Young radiation shield. The data were averaged into 30 minute bins.
Barometric Pressure:
Barometric pressure was measured with the PMEL Qualimetrics sensor. The data were corrected using a linear regression with the ship's barometer and averaged into 30 minute values.
Insolation (sunlight):
Total solar radiation was measured with an Epply Black and White Pyranometer (horizontal surface receiver -180, model 8-48, serial number 12946) and an Epply precision pyranometer (horizontal surface receiver - 180 (twin hemispheres), model PSP, serial number 133035F3) that were mounted on the top of AeroVan. Both instruments were calibrated by The Epply Laboratory on October 11, 1994. There were times when the sampling mast shaded the sensor. Most of these times occurred for about a 30 minute period in the afternoon. (When the ship was traveling South, the mast was West of the sensor). There were also times when the ship's mast shaded the sensor. These \"bad\" data due to shading have not been edited out of the 30 minute data record. The data reported here are 30 minute averages of the Epply 8-48 (SN 12946) in watts per square meter. Any 30 minute period without valid data is marked with a -99.
Winds:
Wind speed and direction were measured with the PMEL Qualimetrics anemometer and the Ship's RM Young anemometer. The PMEL anemometer was mounted above the top of the rain/seaspray shelter at the top of aerosol/gas sampling mast. The location of the PMEL anemometer was chosen primarily to select the times when the sampling mast was in the 'clean' sector, not being influenced by ship pollution. The ship's RM Young anemometer was located on the starboard side of the ship's mast, 33 meters above the water. The PMEL anemometer and ship anemometer were calibrated in the PMEL wind tunnel in July and October 1995, respectively.
The data from the PMEL anemometer were recorded on the PMEL data logger as one minute averages. The data from the ship's RM Young anemometer were recorded on the ship's SCS data system as one minute averages.
The final 30 min average data are reported in 6 columns:
RelWindS, RelWindD, WindS, WindD, WindU, and WindV
Relative wind speed (RelWindS) is the 30 minute average of the wind speed (in m/s) relative to the ship. The relative wind direction (Rel WD) is the 30 minute average of the wind direction relative to the bow of the ship (0 degrees, wind is dead ahead; +90, wind is from the starboard beam; -90, wind is from the port beam). Because the relative wind information is used primarily to determine local ship pollution episodes for air sampling, the PMEL anemometer was used exclusively for the reported relative wind.
True wind speed (WindS) is the 30 minute average of the true wind speed in m/s. True wind direction (True WD) is the 30 minute average wind direction in compass degrees. The PMEL anemometer was located closer to the superstructure of the ship and the wind that it measured was more distorted than that measured by the ship's RM Young anemometer. Thus, the RM Young anemometer was used to derive the true wind speed and direction. During the few times when the SCS system was not working, the PMEL wind data were used.
WindU is the true wind east-west component, wind from the east to the west is positive. WindV is the true wind north-south component, wind from the south to the north is positive
The ship's gyro compass input was used to correct the relative wind to true wind. The wind vector was separated into North and East components and the ship's velocity vector components (as determined from the GPS record) were subtracted to find the true North and true East components of the wind. These components and the resulting (computed) speed and direction at one minute intervals were plotted. A few outliners were eliminated and the resulting data were reduced into 30 minute averages. The averaged North and East components were then used to calculate the 30 minute average wind speed and direction.
Ozone:
Two ozone uv analyzers were used, a Dasibi 1008 AH ,and a TECO 49. Both analyzers were calibrated to a NIST traceable analyzer at the NOAA-CMDL lab prior to the project. One minute averages of the output of each analyzer were recorded on the PMEL data system and plots were made of the raw data. A small portion of the data was deleted (consisting mostly of times that the inlet air was passed through a zero filter - usually when the relative wind was well behind the beam of the ship).
After the raw data was cleaned, the calibration function from CMDL (offset and slope) was applied, and 30-minute averages were created. The 30-minute average from each instrument was then averaged together to create the final data.
Total Particle Number (UFCN):
The total number of particles with diameters 3nm were measured with a TSI 3025 UFCN at the base of the aerosol sampling mast. Missing and polluted data values have been replaced by -99. Units are particles per cubic centimeter averaged over the 30 min
Rainfall Rate:
The rainfall rate was measured with a Scientific Technology Inc. ORG-100 Optical Precipitation Intensity Sensor. The instrument was mounted on the railing of Aero van and was used along with wind direction, wind speed and CN to control the aerosol chemistry pumps. The dynamic range of the sensor is 0.5 to 1600 mm/h. Spikes in the signal are often associated with sea spray. The 30 minute averaged data include all data points. The data are reported in units of mm/hr. (Note: since the data are 30 minute averages, summing all 48 points for one day and dividing by two will give total precipitation in mm for that day.)
Aerosol light scattering:
ScatBlue, ScatGreen, ScatRed are the 60-minute averages of the total aerosol light scattering as measured by the PMEL TSI 3-wavelength (450,550,700nm) nephelometer. The instrument was calibrated on the cruise using CO2. Two impactors were placed upstream of the nephelometer. One had a nominal size cut of 10 um and the other of 1 um (at 55% RH). A valve was switched every 15 minutes by the data logger so that either light scattering of the total aerosol or of the submicron aerosol light scattering was measured.
Submicron aerosol light scattering data are in the columns SubSctB, SubSctG, SubSctR. All light scattering is given in units of Mm-1, inverse megameters (1 Mm-1 = 1E-6 m-1). Missing and polluted data values have been replaced by -99.
Seawater temperature and salinity:
Seawater temperature and salinity were measured with the ship's thermosalinograph (Seabird SBE-21 serial number 843) and recorded on the ship's SCS system. The instrument was calibrated by the NW regional Calibration Center on 10/11/95 just before the cruise. The instantaneous one-minute data set from the ship was very clean and required very little editing. The data were averaged into 30 minute bins. Temperatures are reported in degrees C. Salinity data are in practical salinity units (psu).";
String contributor_name "Coffman, Derek/NOAA-PMEL/Address: 7600 Sand Pt. Wy. NE,Seattle,WA 98115 /email: derek.coffman@noaa.gov";
String Conventions "COARDS, CF-1.6, ACDD-1.3, NCCSV-1.0";
String creator_email "derek.coffman@noaa.gov";
String creator_name "Coffman, Derek";
String creator_url "https://www.pmel.noaa.gov/";
String dimensions "time=2891";
Float64 Easternmost_Easting 229.595;
String featureType "Trajectory";
Float64 geospatial_lat_max 44.484;
Float64 geospatial_lat_min -54.51;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 229.595;
Float64 geospatial_lon_min 134.996;
String geospatial_lon_units "degrees_east";
Float64 geospatial_vertical_max 18.0;
Float64 geospatial_vertical_min 18.0;
String geospatial_vertical_positive "up";
String geospatial_vertical_units "m";
String history
"2025-12-06T03:29:58Z (local files)
2025-12-06T03:29:58Z https://data.pmel.noaa.gov/pmel/tabledap/ACG_ACE-1_Discoverer_main.das";
String infoUrl "https://www.pmel.noaa.gov/acg/data/index.html";
String institution "NOAA";
String keywords "above, ace, ace-1, aerosol, air, air_pressure, air_temp, air_temperature, altitude, ambient, atmoshere, atmosphere, atmospheric, baro_pressure, barometric, chemistry, coefficient, component, compounds, concentration, contaminants, course, data, datetime, density, diffuse, diffuse_downwelling_shortwave_flux_in_air, direction, downwelling, due, duration, earth, Earth Science > Atmosphere > Air Quality > Tropospheric Ozone, Earth Science > Atmosphere > Altitude > Station Height, Earth Science > Atmosphere > Atmospheric Chemistry > Oxygen Compounds, Earth Science > Atmosphere > Atmospheric Chemistry > Oxygen Compounds > Ozone, Earth Science > Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements, Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure, Earth Science > Atmosphere > Atmospheric Pressure > Static Pressure, Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation, Earth Science > Atmosphere > Atmospheric Temperature > Air Temperature, Earth Science > Atmosphere > Atmospheric Temperature > Surface Air Temperature, Earth Science > Atmosphere > Atmospheric Water Vapor > Humidity, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, Earth Science > Atmosphere > Precipitation > Precipitation Rate, Earth Science > Atmosphere > Precipitation > Rain, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, Earth Science > Oceans > Salinity/Density > Salinity, east, eastward, eastward_wind, environmental, flux, fraction, ground, heat, heat flux, height, humidity, identifier, insolation, institue, jisao, joint, laboratory, latitude, level, light, longitude, main, marine, mean, measurements, meteorology, min, mixing, mm-1, mole, mole_fraction_of_ozone_in_air, noaa, north, northward, northward_wind, number, number_concentration_of_aerosol_particles_at_stp_in_air, O2, ocean, oceans, optical, optical properties, over, oxygen, ozone, pacific, particle, particles, platform, platform_course, platform_speed_wrt_ground, pmel, practical, precipitation, pressure, properties, quality, radiation, radiative, rain, rain_rate, rainfall, rainfall_rate, rate, ratio, relative, relative_humidity, relative_wind_direction, relative_wind_speed, salinity, scatter_450_sub1, scatter_450_sub10, scatter_550_sub1, scatter_550_sub10, scatter_700_sub1, scatter_700_sub10, scattering, science, sea, sea_surface_temperature, sea_water_practical_salinity, seawater, ship, ship_course, ship_speed, shortwave, speed, static, station, statistics, stp, study, surface, temperature, time, trajectory, trajectory_id, tropospheric, ufcn, ultrafine, vapor, volume, volume_scattering_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles, water, wind, wind_direction, wind_from_direction, wind_speed, wind_u, wind_v, winds, wrt";
String keywords_vocabulary "GCMD Science Keywords";
String license "These data were produced by NOAA and are not subject to copyright protection in the United States. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0-1.0).";
Float64 Northernmost_Northing 44.484;
String platform "Discoverer";
String product_version "1";
String project "ACE-1";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -54.51;
String standard_name_vocabulary "CF Standard Name Table v70";
String subsetVariables "trajectory_id, duration, altitude, scatter_450_sub1, scatter_550_sub1, scatter_700_sub1, scatter_450_sub10, scatter_550_sub10, scatter_700_sub10";
String summary "Pacific Marine Environmental Laboratory (PMEL) Atmospheric Chemistry ACE-1 Aerosol Main Data - 1 min data. The Southern Hemisphere Marine Aerosol Characterization Experiment (ACE-1) was the first of a series of IGAC experiments designed to quantify the chemical, physical, and meteorological processes controlling the evolution and properties of the atmospheric aerosol relevant to radiative forcing and climate. The PMEL-Joint Institue for the Study of Atmoshere and Ocean (JISAO) Atmospheric Chemistry Group conducted gas and aerosol measurements aboard the NOAA ship Discoverer from Seattle (11 October 1995) to Hobart (10 November 1995) and during the ACE-1 intensive south and west of Tasmania (15 November - 14 December, 1995).";
String time_coverage_end "1995-12-12T22:45:00Z";
String time_coverage_start "1995-10-13T17:45:00Z";
String title "PMEL Atmospheric Chemistry ACE-1 Aerosol Main Data, 1 min data";
Float64 Westernmost_Easting 134.996;
}
}
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.