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 CSP Aerosol Main Data, 1 min data
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| Institution: | NOAA (Dataset ID: ACG_CSP_Discoverer_main) |
| Range: | longitude = 147.425 to 199.301°E, latitude = -14.454 to 18.821°N, altitude = 18.0 to 18.0m, time = 1996-03-15T05:45:00Z to 1996-04-12T17:45:00Z |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Data Access Form
| Files
|
|
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![[The graph you specified. Please be patient.]](https://data.pmel.noaa.gov/pmel/erddap/tabledap/ACG_CSP_Discoverer_main.png?longitude,latitude,duration&time%3E=1996-04-06T00%3A00%3A00Z&time%3C=1996-04-13T00%3A00%3A00Z&.draw=markers&.marker=5%7C5&.color=0x000000&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff)
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Attributes {
s {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 8.268687e+8, 8.293311e+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 -14.454, 18.821;
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 147.425, 199.301;
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 actual_range 0.12, 17.81;
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 actual_range 0.0, 355.8;
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 23.29, 32.32;
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 58.05, 106.0;
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 999.945, 1017.53;
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 actual_range 0.0, 1147.0;
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, 133.5;
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 actual_range 0.2, 14.2;
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 actual_range 2.0, 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 actual_range -13.4, 10.3;
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 actual_range -10.1, 8.0;
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 actual_range 0.6, 18.4;
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 actual_range -178.0, 174.0;
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 34.28, 2224.6;
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 25.22, 30.58;
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 34.03, 35.72;
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 3.08, 38.67;
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 actual_range 0.385, 11.4;
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 actual_range 0.215, 7.96;
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 actual_range 0.0376, 4.92;
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;
}
backscatter_450_sub1 {
Float64 _FillValue NaN;
Float64 actual_range -0.179, 1.08;
String coords "time";
String instrument "TSI Model 3563 Nephelometer";
String ioos_category "Optical Properties";
String long_name "Aerosol light backscattering coefficient for Dp < 1.1 um at 450 nm, Mm-1";
String source "surface observations";
String units "MM-1";
}
backscatter_550_sub1 {
Float64 _FillValue NaN;
Float64 actual_range -0.0898, 0.84;
String coords "time";
String ioos_category "Optical Properties";
String long_name "Aerosol light backscattering coefficient for Dp < 1.1 um at 550 nm, Mm-1";
String source "surface observation";
String units "MM-1";
}
backscatter_700_sub1 {
Float64 _FillValue NaN;
Float64 actual_range -0.308, 0.792;
String coords "time";
String ioos_category "Optical Properties";
String long_name "Aerosol light backscattering coefficient for Dp < 1.1 um at 700 nm, Mm-1";
String source "surface observation";
String units "MM-1";
}
scatter_450_sub10 {
Float64 _FillValue NaN;
Float64 actual_range 1.27, 30.8;
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 actual_range 1.23, 31.6;
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 actual_range 1.21, 31.4;
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;
}
backscatter_450_sub10 {
Float64 _FillValue NaN;
Float64 actual_range 0.0066, 4.47;
String coords "time";
String instrument "TSI Model 3563 Nephelometer";
String ioos_category "Optical Properties";
String long_name "Aerosol light backscattering coefficient for Dp < 10 um at 450 nm, Mm-1";
String source "surface observation";
String units "MM-1";
}
backscatter_550_sub10 {
Float64 _FillValue NaN;
Float64 actual_range 0.119, 4.48;
String coords "time";
String ioos_category "Optical Properties";
String long_name "Aerosol light backscattering coefficient for Dp < 10 um at 550 nm, Mm-1";
String source "surface observation";
String units "MM-1";
}
backscatter_700_sub10 {
Float64 _FillValue NaN;
Float64 actual_range -0.134, 4.39;
String coords "time";
String ioos_category "Optical Properties";
String long_name "Aerosol light backscattering coefficient for Dp < 10 um at 700 nm, Mm-1";
String source "surface observation";
String units "MM-1";
}
}
NC_GLOBAL {
String cdm_data_type "Trajectory";
String cdm_trajectory_variables "trajectory_id";
String comment
"Latitude, Longitude
The ship's position was recorded on the PMEL data logger from the PMEL Trimbal GPS unit. The latitude and longitude are measurements at each even 30 minute point with no averaging. For those times when there were no data at the 30 minute point, a point was taken from the Discoverer's SCS data system file. Units are decimal degrees north for latitude and decimal degrees east for longitude (200 degrees east = 160 degrees west).
Wind Speed and Direction
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 as (true) wind speed and direction and relative wind speed and direction. The relative wind direction is 0 degrees = wind coming from dead ahead. +90 degrees = wind coming from the starboard beam, -90 degrees= wind coming from the port beam. The East and North components of the true wind speed are given as WindU and WindV respectively. For this project wind coming from the east is a negative WindU and wind coming from the north is a negative WindV.
Air Temperature and RH
Air Temperature and RH were recorded with the the PMEL RM Young sensor, and the PMEL Qualimetrics sensor. The sensors were mounted on top of aerovan forward of the bridge. The data are reported in % (RH) and deg C (AirTemp).
Barometer
The ship's digital barometer as recorded in the ship's SCS data record was used for barometric pressure
Precipitation
Precipitation 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.
Solar Radiation
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. The instrument was calibrated by The Eppley Laboratory on October 11, 1994. There were times when the sampling mast shaded 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 in 30 minute averages in units of watts per square meter.
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).
CN (UFCN)
The total number of particles with diameters > 3nm were measured with a TSI 3025 at the base of the aerosol sampling mast. Missing and polluted data values have been replaced by -999. Units are particles per cubic centimeter.
Light Scattering
Light Scattering by particles was measured by a TSI TSI 3-wavelength (450,550,700nm) total and backscatter nephelometer. Two impactors were placed upstream of the nephelometer. One had a nominal size cut of 10 um and the other of 1 um. 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. Each 30 minute averaging period included 15 minutes of data for submicron scattering and 15 minutes of data for total (light scattering by all particles). The instrument was calibrated on the cruise using CO2. The scattering values are in units of inverse mega meters.
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. The instantaneous one-minute data set from the ship were very clean and required very little editing. 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=1367";
Float64 Easternmost_Easting 199.301;
String featureType "Trajectory";
Float64 geospatial_lat_max 18.821;
Float64 geospatial_lat_min -14.454;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 199.301;
Float64 geospatial_lon_min 147.425;
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
"2025-12-07T19:30:19Z (local files)
2025-12-07T19:30:19Z https://data.pmel.noaa.gov/pmel/tabledap/ACG_CSP_Discoverer_main.das";
String infoUrl "https://www.pmel.noaa.gov/acg/data/index.html";
String institution "NOAA";
String keywords "above, aerosol, air, air_pressure, air_temp, air_temperature, altitude, ambient, atmosphere, atmospheric, backscatter_450_sub1, backscatter_450_sub10, backscatter_550_sub1, backscatter_550_sub10, backscatter_700_sub1, backscatter_700_sub10, backscattering, baro_pressure, barometric, chemistry, coefficient, component, compounds, concentration, contaminants, course, csp, data, datetime, density, department, diffuse, diffuse_downwelling_shortwave_flux_in_air, direction, doe, 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, energy, environmental, flux, fraction, ground, heat, heat flux, height, humidity, identifier, insolation, 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, remote, remss, 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, sensing, ship, ship_course, ship_speed, shortwave, speed, static, station, statistics, stp, surface, systems, 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 18.821;
String platform "Discoverer";
String product_version "0";
String project "CSP";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -14.454;
String standard_name_vocabulary "CF Standard Name Table v70";
String subsetVariables "trajectory_id, duration, altitude";
String summary "Pacific Marine Environmental Laboratory (PMEL) Atmospheric Chemistry CSP Aerosol Main Data - 1 min data. The Combined Sensor Program, CSP, brought together for the first time in a maritime environment a suite of in-situ and remote sensing systems to characterize both air-sea interaction and the radiative balance of the tropical atmosphere, including aerosols and clouds. The cruise departed Pago Pago, American Samoa on 14 March 1996, headed northwest to 2S, and then turned west to Manus Island, Papua New Guinea. The ship was positioned for 10 days within 100 km of Manus Island to acquire data in coordination with the Department of Energy (DOE) Atmospheric Radiation Measurement, ARM, Cloud and Radiation Testbed, CART, site on the island. The ship then headed east to 180W and then northeast to Hawaii, arriving on 13 April 1996.";
String time_coverage_end "1996-04-12T17:45:00Z";
String time_coverage_start "1996-03-15T05:45:00Z";
String title "PMEL Atmospheric Chemistry CSP Aerosol Main Data, 1 min data";
Float64 Westernmost_Easting 147.425;
}
}
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.