Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.57845612e+9, 1.58126988e+9;
    String axis "T";
    String calendar "gregorian";
    Float64 colorBarMaximum 1.582e+9;
    Float64 colorBarMinimum 1.578e+9;
    String ioos_category "Time";
    String long_name "Midpoint Time of Sample Period";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  trajectory_id {
    String cf_role "trajectory_id";
    String ioos_category "Identifier";
    String long_name "trajectory id";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue -1.0e+34;
    Float64 actual_range 13.1416, 15.748;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "In the one minute files the position is treated somewhat differently from all the other data. The position given is the ship's position at the start of the one minute 'averaging' period. All other data are a true average. The PMEL GPS was the primary source. The Ship's GPS was used when there were missing data in the PMEL record.";
    String epic_code "500";
    String instrument "GPS";
    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;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue -1.0e+34;
    Float64 actual_range -59.072, -50.9607;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "In the one minute files the position is treated somewhat differently from all the other data. The position given is the ship's position at the start of the one minute 'averaging' period. All other data are a true average. The PMEL GPS was the primary source. The Ship's GPS was used when there were missing data in the PMEL record.";
    String epic_code "502";
    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;
  }
  OC_sub1 {
    Float64 _FillValue -1.0e+34;
    Float64 actual_range 0.19, 1.64;
    Float64 colorBarMaximum 2.0;
    Float64 colorBarMinimum 0.0;
    String epic_code "1959";
    String instrument "Impactor Dp < 1um (13); Impactor Dp < 1um +denduder (14); Sunset Laboratory thermal/optical analyzer (sn: )";
    String ioos_category "Ocean Color";
    String long_name "Organic Carbon Concentration in Dp < 1.1um particles in air";
    String lower_limit_of_detection "0.1 to 0.8 ug/m3";
    Float64 missing_value -999.0;
    String source "surface observation";
    String standard_name "mass_concentration_of_primary_particulate_organic_matter_dry_aerosol_particles_in_air";
    String uncertainty "+/- 13%";
    String units "micrograms m-3";
  }
  OC_super1 {
    Float64 _FillValue -1.0e+34;
    Float64 actual_range 0.0, 1.3;
    String epic_code "1960";
    String instrument "Impactor Dp < 1um (13); Impactor Dp < 1um +denduder (14); Impactor Dp<10um (10) Sunset Laboratory thermal/optical analyzer (sn: )";
    String ioos_category "Ocean Color";
    String long_name "Organic Carbon Concentration in 1.1um < Dp < 10um particles in air";
    String lower_limit_of_detection "0.1 to 0.8 ug/m3";
    Float64 missing_value -999.0;
    String source "surface observation";
    String standard_name "mass_concentration_of_primary_particulate_organic_matter_dry_aerosol_particles_in_air";
    String uncertainty "+/- 13%";
    String units "micrograms m-3";
  }
  EC_sub1 {
    Float64 _FillValue -1.0e+34;
    Float64 actual_range 0.0, 0.61;
    String epic_code "1962";
    String instrument "Impactor Dp < 1um (13); Impactor Dp < 1um +denduder (14); Sunset Laboratory thermal/optical analyzer (sn: )";
    String ioos_category "Unknown";
    String long_name "Elemental Carbon Concentration in Dp < 1.1um particles in air";
    String lower_limit_of_detection "0.015 to 0.12 ug/m3";
    Float64 missing_value -999.0;
    String source "surface observation";
    String uncertainty "+/- 9%";
    String units "micrograms m-3";
  }
  start_time {
    Float64 actual_range 1.57843452e+9, 1.581204e+9;
    String calendar "gregorian";
    Float64 colorBarMaximum 1.582e+9;
    Float64 colorBarMinimum 1.578e+9;
    String ioos_category "Time";
    String long_name "Start Time of Sample Period";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  stop_time {
    Float64 actual_range 1.57847772e+9, 1.58133576e+9;
    String calendar "gregorian";
    Float64 colorBarMaximum 1.582e+9;
    Float64 colorBarMinimum 1.578e+9;
    String ioos_category "Time";
    String long_name "Stop Time of Sample Period";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  sample_number {
    Float64 _FillValue -1.0e+34;
    Float64 actual_range 1.0, 27.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "Sample Number";
    Float64 missing_value -999.0;
    String units "1";
  }
 }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.7.4,hdf5=1.10.6";
    String cdm_data_type "Trajectory";
    String cdm_trajectory_variables "trajectory_id";
    String comment "Sub-1.1 um and sub-10 um samples were collected on pre-combusted quartz fiber filters using 2 and 1 stage impactors, respectively, for organic carbon (OC) and elemental carbon (EC) analysis [Bates et al., 2004]. A charcoal diffusion denuder was deployed upstream of the submicrometer impactor to remove gas phase organic species. OC and EC concentrations were determined with a Sunset Laboratory thermal/optical analyzer. Three temperature steps were used to evolve OC under O2-free conditions for quantification. The first step heated the filter to 230 Deg C; the second step heated the filter to 600 Deg C (AMS vaporizer temperature); and the final step heated the filter to 870 Deg C. After cooling the sample down to 550 Deg C, a He/O2 mixture was introduced and the sample was heated in four temperature steps to 910 Deg C to drive off EC. The transmission of light through the filter was measured to correct the observed EC for any OC that charred during the initial stages of heating. No correction was made for carbonate carbon so OC includes both organic and carbonate carbon. The percentage of carbonate carbon is unknown. Super-micrometer OC concentrations were determined by difference between submicrometer and sub-10 um impactor samples without denuders.";
    String contributor_name "Coffman, Derek;Johnson, James;Quinn, Patricia;Bates, Tim;Upchurch, Lucia";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "james.e.johnson@noaa.gov";
    String creator_name "Johnson, James";
    String creator_url "https://saga.pmel.noaa.gov";
    String date_created "2020-11-30T17:21:04Z";
    Float64 Easternmost_Easting -50.9607;
    String featureType "Trajectory";
    Float64 geospatial_lat_max 15.748;
    Float64 geospatial_lat_min 13.1416;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -50.9607;
    Float64 geospatial_lon_min -59.072;
    String geospatial_lon_units "degrees_east";
    String history "file created by NOAA/PMEL/ACG
2024-04-26T14:25:03Z (local files)
2024-04-26T14:25:03Z https://data.pmel.noaa.gov/pmel/erddap/tabledap/EUREC4A_ATOMIC_RonBrown_PMEL_OCEC_v0.das";
    String infoUrl "https://saga.pmel.noaa.gov";
    String institution "NOAA PMEL Atmospheric Chemistry";
    String keywords "1.1um, 10um, aerosol, air, atmospheric, atomic, carbon, chemistry, collected, color, concentration, data, dry, EC_sub1, elemental, environmental, identifier, impactor, laboratory, latitude, longitude, marine, mass, mass_concentration_of_primary_particulate_organic_matter_dry_aerosol_particles_in_air, matter, midpoint, noaa, number, OC_sub1, OC_super1, ocean, ocean color, ocec, organic, pacific, particles, particulate, period, pmel, primary, sample, sample_number, start, start_time, statistics, stop, stop_time, time, trajectory, trajectory_id";
    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, ERD, 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.";
    Float64 Northernmost_Northing 15.748;
    String platform "RHBrown";
    String product_version "0";
    String project "ATOMIC";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 13.1416;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "trajectory_id";
    String summary "ATOMIC (Atlantic Tradewind Ocean Atmosphere Mesoscale Interaction Campaign) 2020 Field campaign: Surface meteorological and ship navigation collected from the RV Ronald H. Brown by the National Oceanic and Atmospheric Administration (NOAA) Pacific Marine Environmental Laboratory (PMEL) Atmospheric Chemistry Group in the tropical North Atlantic ocean from 2020-01-09 to 2020-02-13";
    String time_coverage_end "2020-02-09T17:38:00Z";
    String time_coverage_start "2020-01-08T04:02:00Z";
    String title "PMEL Atmospheric Chemistry ATOMIC Impactor collected OCEC";
    Float64 Westernmost_Easting -59.072;
    Float64 Westernnmost_Easting -59.072;
  }
}