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Dataset Title:  PMEL Atmospheric Chemistry ATOMIC CN_O3 1 minute data Subscribe RSS
Institution:  NOAA PMEL Atmospheric Chemistry   (Dataset ID: EUREC4A_ATOMIC_RonBrown_PMEL_CN_O3_v1)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
   or a List of Values ?
   Maximum ?
 
 time (UTC) ?          2020-01-07T18:00:00Z    2020-02-11T23:59:00Z
  < slider >
 trajectory_id ?      
   - +  ?
 latitude (degrees_north) ?          12.7865    15.8652
  < slider >
 longitude (degrees_east) ?          -59.6588    -50.9246
  < slider >
 ozone (Ozone Mixing Ratio, ppb) ?          12.119    46.984
 cn (cm-3) ?          76.1667    35002.9
 ufcn (cm-3) ?          76.3347    75773.5
 
Server-side Functions ?
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.57842e+9, 1.58146554e+9;
    String axis "T";
    String calendar "gregorian";
    Float64 colorBarMaximum 1.582e+9;
    Float64 colorBarMinimum 1.578e+9;
    String ioos_category "Time";
    String long_name "Time";
    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 12.7865, 15.8652;
    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 -59.6588, -50.9246;
    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;
  }
  ozone {
    Float64 _FillValue -1.0e+34;
    Float64 actual_range 12.119, 46.984;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String comment "Air was pulled from 16 m above sea level through a 1/4 inch teflon line at approximately 1 liter min-1 into a Thermo Environmental Instruments Model 49c ozone analyzer. The air inlet was approximately 2 meters below the aerosol inlet. During periods when the relative wind was behind the beam, there were obvious periods when ship exhaust was reacting with ozone, resulting in sudden spikes of low ozone.  These spikes of low ozone have been edited out.   The data are reported as one minute averages in units of ppb.";
    String epic_code "1807";
    String instrument "Thermo Environmental Instruments ozone analyzer ( Model 49c, sn: 0519412239 )";
    String ioos_category "Contaminants";
    String long_name "Ozone Mixing Ratio";
    Float64 missing_value -999.0;
    String source "surface observation";
    String standard_name "mole_fraction_of_ozone_in_air";
    String units "ppb";
    Float64 valid_max 250.0;
    Float64 valid_min 0.0;
  }
  cn {
    Float64 _FillValue -1.0e+34;
    Float64 actual_range 76.1667, 35002.9;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comment "One of the twenty one 1.6 cm diameter tubes was used to supply ambient air to TSI 3010 (CN_Direct), a Brechtel aMCPC (CN_Stack) and TSI 3025A (UFCN_Direct) particle counters. Another one of the tubes was used to supply ambient air to TSI3785 (UFCN_Chem)  and Aerosol Devices MAGIC210 (CN_MART) particle counters. The 3010, aMCPC, 3025, 3785 and MAGIC210 measure all particles larger than roughly 12, 5, 3, 5 and 5 nm respectively. The total particle counts from each instrument were recorded each second. The data were filtered to eliminate periods of calibration and instrument malfunction and zero air periods, and periods of obvious ship contamination from the R/V Brown (based on relative wind and high CN counts). The \"best\" filtered values were chosen to represent CN>12 (CN) and ultra-fine (UFCN) particle concentrations. The best CN values are primarily from CN_Direct with data from CN_Stack used to fill in periods where the CN_Direct data were not available. Similarly, the UFCN values are primarily from UFCN_Direct with the UFCN_Chem and CN_MART data used to fill in periods where UFCN_Direct data were not available. These \"best\" data were averaged into one minute periods. One second data are available upon request.";
    String epic_code "1853";
    String instrument "TSI 3010 (sn: 2251); Brechtel aMCPC (sn: 013); Aerosol Devices MAGIC210 (sn: 210-071)";
    String ioos_category "Statistics";
    String long_name "Number Concentration of Particles";
    Float64 missing_value -999.0;
    String source "surface observation";
    String standard_name "number_concentration_of_aerosol_particles_at_stp_in_air";
    String units "cm-3";
    Float64 valid_max 50000.0;
    Float64 valid_min 0.0;
  }
  ufcn {
    Float64 _FillValue -1.0e+34;
    Float64 actual_range 76.3347, 75773.5;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comment "One of the twenty one 1.6 cm diameter tubes was used to supply ambient air to TSI 3010 (CN_Direct), a Brechtel aMCPC (CN_Stack) and TSI 3025A (UFCN_Direct) particle counters. Another one of the tubes was used to supply ambient air to TSI3785 (UFCN_Chem)  and Aerosol Devices MAGIC210 (CN_MART) particle counters. The 3010, aMCPC, 3025, 3785 and MAGIC210 measure all particles larger than roughly 12, 5, 3, 5 and 5 nm respectively. The total particle counts from each instrument were recorded each second. The data were filtered to eliminate periods of calibration and instrument malfunction and zero air periods, and periods of obvious ship contamination from the R/V Brown (based on relative wind and high CN counts). The \"best\" filtered values were chosen to represent CN>12 (CN) and ultra-fine (UFCN) particle concentrations. The best CN values are primarily from CN_Direct with data from CN_Stack used to fill in periods where the CN_Direct data were not available. Similarly, the UFCN values are primarily from UFCN_Direct with the UFCN_Chem and CN_MART data used to fill in periods where UFCN_Direct data were not available. These \"best\" data were averaged into one minute periods. One second data are available upon request.";
    String epic_code "1852";
    String instrument "TSI 3025A (sn: 1110); TSI 3785 (sn: 70613009)";
    String ioos_category "Statistics";
    String long_name "Number Concentration of Ultrafine Particles";
    Float64 missing_value -999.0;
    String source "surface observation";
    String standard_name "number_concentration_of_aerosol_particles_at_stp_in_air";
    String units "cm-3";
    Float64 valid_max 50000.0;
    Float64 valid_min 0.0;
  }
 }
  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 
"Unless otherwise noted, ambient aerosol particles were sampled at 18 m above sea level through a heated mast. The mast extended 5 m above and forward of the aerosol measurement container. The inlet was a rotating cone-shaped nozzle that was automatically positioned into the relative wind to maintain nominally isokinetic flow and minimize the loss of supermicrometer particles. Air entered the inlet through a 5 cm diameter hole, passed through a 7 degree expansion cone, and then into the 20 cm inner diameter sampling mast. The flow through the mast was 1 m3 min-1. The transmission efficiency of the inlet for particles with aerodynamic diameters less than 6.5 um (the largest size tested) is greater than 95% [Bates et al., 2002].\r
\r
The bottom 1.5 m of the mast were heated to establish a stable reference relative humidity (RH) for the sample air of in the controlled range of 55 to 60 %RH. Twenty one 1.6 cm inner diameter stainless steel tubes extending into the heated portion of the mast were connected to downstream aerosol instrumentation with either conductive silicon tubing or stainless steel tubing for analysis of organic aerosol.";
    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 "2020-11-30T17:20:26Z";
    Float64 Easternmost_Easting -50.9246;
    String featureType "Trajectory";
    Float64 geospatial_lat_max 15.8652;
    Float64 geospatial_lat_min 12.7865;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -50.9246;
    Float64 geospatial_lon_min -59.6588;
    String geospatial_lon_units "degrees_east";
    String history 
"file created by NOAA/PMEL/ACG
2024-04-23T17:46:04Z (local files)
2024-04-23T17:46:04Z https://data.pmel.noaa.gov/pmel/erddap/tabledap/EUREC4A_ATOMIC_RonBrown_PMEL_CN_O3_v1.html";
    String infoUrl "https://saga.pmel.noaa.gov";
    String institution "NOAA PMEL Atmospheric Chemistry";
    String keywords "aerosol, air, atmosphere, atmospheric, atomic, chemistry, compounds, concentration, contaminants, data, earth, Earth Science > Atmosphere > Air Quality > Tropospheric Ozone, Earth Science > Atmosphere > Atmospheric Chemistry > Oxygen Compounds, Earth Science > Atmosphere > Atmospheric Chemistry > Oxygen Compounds > Ozone, environmental, fraction, identifier, laboratory, latitude, longitude, marine, minute, mixing, mole, mole_fraction_of_ozone_in_air, noaa, number, number_concentration_of_aerosol_particles_at_stp_in_air, O2, oxygen, ozone, pacific, particles, pmel, quality, ratio, science, statistics, stp, time, trajectory, trajectory_id, tropospheric, ufcn, ultrafine";
    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 15.8652;
    String platform "RHBrown";
    String product_version "1";
    String project "ATOMIC";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 12.7865;
    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 "2020-02-11T23:59:00Z";
    String time_coverage_start "2020-01-07T18:00:00Z";
    String title "PMEL Atmospheric Chemistry ATOMIC CN_O3 1 minute data";
    Float64 Westernmost_Easting -59.6588;
    Float64 Westernnmost_Easting -59.6588;
  }
}

 

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