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 AOD(4080) data
|
| Institution: | NOAA (Dataset ID: ACG_ACE-1_Discoverer_aod4080) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Files
| Make a graph
|
Attributes {
s {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 8.136111e+8, 8.1865608e+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 -51.4931, 44.2603;
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 -176.73, 178.777;
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 -0.0244, 1.2101;
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 0.0272, 0.6835;
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 -0.0149, 1.5816;
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 0.0012, 1.2313;
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;
}
}
NC_GLOBAL {
String cdm_data_type "Trajectory";
String cdm_trajectory_variables "trajectory_id";
String comment
"Calibration of the sunphotometers is based on Langley plots derived from measurements at Mauna Loa.
The relative air mass, mr, was calculated using Kasten's formula.
The total measured optical depth was used to calculate the aerosol optical depth by subtracting Rayleigh and ozone extinction, i.e.,
AOD = TotalOD - OD,Rayleigh - OD,ozone
where
OD, Rayleigh = P/Po x 0.00877l-4.05 + d(l)
and P = the atmospheric pressure during the observation, Po is standard atmospheric pressure (1013.25 mb), and d(l) is a time-dependent minor correction for a shift in the filter l.
OD,ozone = 0.01 at 500 nm and negligible at all other wavelengths.
The 380 nm channel displayed a severe drift after DOY 338. Therefore, these data have been removed from the record.";
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=118";
Float64 Easternmost_Easting 178.777;
String featureType "Trajectory";
Float64 geospatial_lat_max 44.2603;
Float64 geospatial_lat_min -51.4931;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 178.777;
Float64 geospatial_lon_min -176.73;
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
"2026-01-14T19:40:10Z (local files)
2026-01-14T19:40:10Z https://data.pmel.noaa.gov/pmel/erddap/tabledap/ACG_ACE-1_Discoverer_aod4080.html";
String infoUrl "https://www.pmel.noaa.gov/acg/data/index.html";
String institution "NOAA";
String keywords "380nm, 440nm, 500nm, 675nm, above, absorption, ace, ace-1, aerosol, altitude, ambient, aod, aod_380, aod_440, aod_500, aod_675, atmoshere, atmosphere, atmosphere_absorption_optical_thickness_due_to_ambient_aerosol_particles, atmospheric, chemistry, data, datetime, depth, due, duration, earth, Earth Science > Atmosphere > Altitude > Station Height, environmental, height, identifier, institue, jisao, joint, laboratory, latitude, level, longitude, marine, mean, noaa, ocean, optical, optical properties, pacific, particles, pmel, properties, science, sea, station, study, thickness, time, trajectory, trajectory_id";
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 44.2603;
String platform "Discoverer";
String product_version "0";
String project "ACE-1";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -51.4931;
String standard_name_vocabulary "CF Standard Name Table v70";
String subsetVariables "trajectory_id, duration, altitude";
String summary "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 Pacific Marine Environmental Laboratory (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 "1995-12-11T04:28:00Z";
String time_coverage_start "1995-10-13T19:05:00Z";
String title "PMEL Atmospheric Chemistry ACE-1 AOD(4080) data";
Float64 Westernmost_Easting -176.73;
}
}
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.