The Pacific Marine Environmental Laboratory's ERDDAP data server for public access to scientific data
NOAA OAR PMEL
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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 AEROSOLS99-INDOEX AOD(4080) data
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| Institution: | NOAA (Dataset ID: ACG_AEROSOLS99-INDOEX_RHBrown_aod4080) |
| Range: | longitude = -52.304 to 78.515°E, latitude = -30.013 to 21.8109°N, altitude = 18.0 to 18.0m, time = 1999-01-20T15:48:00Z to 1999-03-27T07:52:00Z |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Data Access Form
| Files
|
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Zoom:
![[The graph you specified. Please be patient.]](https://data.pmel.noaa.gov/pmel/erddap/tabledap/ACG_AEROSOLS99-INDOEX_RHBrown_aod4080.png?longitude,latitude,duration&time%3E=1999-03-21T00%3A00%3A00Z&time%3C=1999-03-28T00%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 9.1684728e+8, 9.2252112e+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 60, 60;
String coords "time";
String ioos_category "Time";
String long_name "Duration";
String units "second";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 actual_range -30.013, 21.8109;
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 -52.304, 78.515;
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;
}
aod_380 {
Float64 actual_range 0.0612, 0.7238;
Float64 colorBarMaximum 6.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Microtops sunphotometer";
String ioos_category "Optical Properties";
String long_name "Aerosol Optical Depth at 380nm";
String source "surface observation";
String standard_name "atmosphere_absorption_optical_thickness_due_to_ambient_aerosol_particles";
Float64 valid_max 5.0;
Float64 valid_min 0.0;
}
aod_440 {
Float64 actual_range 0.0459, 0.6534;
Float64 colorBarMaximum 6.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Microtops sunphotometer";
String ioos_category "Optical Properties";
String long_name "Aerosol Optical Depth at 440nm";
String source "surface observation";
String standard_name "atmosphere_absorption_optical_thickness_due_to_ambient_aerosol_particles";
Float64 valid_max 5.0;
Float64 valid_min 0.0;
}
aod_500 {
Float64 actual_range 0.0079, 0.6073;
Float64 colorBarMaximum 6.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Microtops sunphotometer";
String ioos_category "Optical Properties";
String long_name "Aerosol Optical Depth at 500nm";
String source "surface observation";
String standard_name "atmosphere_absorption_optical_thickness_due_to_ambient_aerosol_particles";
Float64 valid_max 5.0;
Float64 valid_min 0.0;
}
aod_675 {
Float64 actual_range 0.0068, 0.4862;
Float64 colorBarMaximum 6.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Microtops sunphotometer";
String ioos_category "Optical Properties";
String long_name "Aerosol Optical Depth at 675nm";
String source "surface observation";
String standard_name "atmosphere_absorption_optical_thickness_due_to_ambient_aerosol_particles";
Float64 valid_max 5.0;
Float64 valid_min 0.0;
}
aod_870 {
Float64 actual_range 0.0103, 0.4023;
Float64 colorBarMaximum 6.0;
Float64 colorBarMinimum 0.0;
String coords "time";
String instrument "Microtops sunphotometer";
String ioos_category "Optical Properties";
String long_name "Aerosol Optical Depth at 870nm";
String source "surface observation";
String standard_name "atmosphere_absorption_optical_thickness_due_to_ambient_aerosol_particles";
Float64 valid_max 5.0;
Float64 valid_min 0.0;
}
}
NC_GLOBAL {
String cdm_data_type "Trajectory";
String cdm_trajectory_variables "trajectory_id";
String comment
"Aerosol Optical Depth (AOD)
A handheld Microtops sunphotometer (Solar Light Co.) was used for the measurement of AOD at wavelengths of 380, 440, 500, 675, and 870 nm. Details about the data processing can be found at:
https://aeronet.gsfc.nasa.gov/new_web/man_data.html";
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=143";
Float64 Easternmost_Easting 78.515;
String featureType "Trajectory";
Float64 geospatial_lat_max 21.8109;
Float64 geospatial_lat_min -30.013;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 78.515;
Float64 geospatial_lon_min -52.304;
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
"2025-12-11T18:28:31Z (local files)
2025-12-11T18:28:31Z https://data.pmel.noaa.gov/pmel/tabledap/ACG_AEROSOLS99-INDOEX_RHBrown_aod4080.das";
String infoUrl "https://www.pmel.noaa.gov/acg/data/index.html";
String institution "NOAA";
String keywords "380nm, 440nm, 500nm, 675nm, 870nm, above, absorption, advanced, aerosol, aerosols99, aerosols99-indoex, altitude, ambient, aod, aod_380, aod_440, aod_500, aod_675, aod_870, atmosphere, atmosphere_absorption_optical_thickness_due_to_ambient_aerosol_particles, atmospheric, avhrr, chemistry, convergence, data, datetime, depth, due, duration, earth, Earth Science > Atmosphere > Altitude > Station Height, environmental, field, field-of-view, height, high, identifier, indoex, intertropical, itcz, laboratory, latitude, level, longitude, marine, mean, noaa, optical, optical properties, pacific, particles, pmel, properties, radiometer, resolution, science, sea, sea-wide, seawifs, sensor, station, thickness, time, trajectory, trajectory_id, very, vhrr, view, wide, zone";
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 21.8109;
String platform "RHBrown";
String product_version "0";
String project "AEROSOLS99-INDOEX";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -30.013;
String standard_name_vocabulary "CF Standard Name Table v70";
String subsetVariables "trajectory_id, duration, altitude";
String summary
"The Aerosols99 and INDOEX research cruise occurred on the NOAA ship Ronald H. Brown between January 14 and March 30.
The Aerosols99 cruise crossed the Atlantic Ocean from Norfolk, Virginia to Cape Town, South Africa between January 14 and February 8, 1999. The goals of the cruise were to determine the chemical, physical, and optical properties of the marine boundary layer (MBL) aerosol, the vertical distribution of aerosols and ozone, the column integrated aerosol optical depth and the ozone, CO and peroxy radical chemistry in the MBL. Sampling strategies were optimized to obtain data sets to evaluate satellite derived ocean color (Sea-Wide Field-of-View Sensor (SeaWiFS)), aerosol optical depth (Advanced Very High Resolution Radiometer (AVHRR)) and total column ozone (TOMS). The cruise track crossed through 7 different meteorological/oceanographic regimes ranging from background marine air masses in the Northern and Southern hemispheres to air masses containing mineral dust and the products of biomass burning
The INDOEX research cruise left Capt Town on Febuary 11 and ended in Male, Maldives in March 30. The cruise was an important component of the Indian Ocean Experiment (INDOEX). This project was a large multi-national, multi-agency intensive field experiment in the Indian Ocean with three interrelated objectives:
Assess the significance of sulfates and other continental aerosols for global radiative forcing.
Assess the magnitude of the solar absorption at the surface and in the troposphere including the intertropical convergence zone (ITCZ) cloud systems.
Assess the role of the ITCZ in the transport of trace species and pollutants and their resultant radiative forcing.";
String time_coverage_end "1999-03-27T07:52:00Z";
String time_coverage_start "1999-01-20T15:48:00Z";
String title "PMEL Atmospheric Chemistry AEROSOLS99-INDOEX AOD(4080) data";
Float64 Westernmost_Easting -52.304;
}
}
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.