NOAA ERDDAP
Easier access to scientific data
   
Brought to you by NOAA NMFS SWFSC ERD    

ERDDAP > tabledap > Data Access Form ?

Dataset Title:  Long-term Air Chemistry Monitoring Experiment-Supermicron Subscribe RSS
Institution:  NOAA PMEL Atmospheric Chemistry   (Dataset ID: station_barrow_supermicron_chemistry)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
   or a List of Values ?
   Maximum ?
 
 Station ?      
   - +  ?
 latitude (degrees_north) ?      
   - +  ?
  < slider >
 longitude (degrees_east) ?      
   - +  ?
  < slider >
 time (Start DateTime UTC, UTC) ?          1997-10-10T07:32:00Z    2022-12-07T00:46:28Z
  < slider >
 Stop_time (Stop DateTime UTC, UTC) ?          1997-10-21T11:51:00Z    2022-12-18T05:59:32Z
 Filter_ID ?          "2010_007_S"    "S"
 volume (Volume of air sampled, m3) ?          3.46    1131.8
 mass_super1_conc (micrograms m-3) ?          0.0    32.11
 IC_Na_super1_conc (micrograms m-3) ?          2.0E-4    2.0181
 IC_NH4_super1_conc (micrograms m-3) ?          0.0    1.0535
 IC_K_super1_conc (micrograms m-3) ?          0.0    0.1004
 IC_Mg_super1_conc (micrograms m-3) ?          1.0E-4    0.2282
 IC_Ca_super1_conc (micrograms m-3) ?          4.0E-4    2.7609
 IC_MSA_super1_conc (micrograms m-3) ?          1.0E-4    0.039
 IC_Cl_super1_conc (micrograms m-3) ?          1.0E-4    2.3656
 IC_Br_super1_conc (micrograms m-3) ?          1.0E-4    0.0161
 IC_NO3_super1_conc (micrograms m-3) ?          1.0E-4    0.6574
 IC_total_SO4_super1_conc (micrograms m-3) ?          5.0E-4    0.6462
 IC_Oxalate_super1_conc (micrograms m-3) ?          1.0E-4    0.025
 IC_Na_super1_blank (micrograms m-3) ?          0.0    0.0652
 IC_NH4_super1_blank (micrograms m-3) ?          0.0    0.1828
 IC_K_super1_blank (micrograms m-3) ?          0.0    0.0062
 IC_Mg_super1_blank (micrograms m-3) ?          0.0    0.0043
 IC_Ca_super1_blank (micrograms m-3) ?          0.0    0.044
 IC_MSA_super1_blank (micrograms m-3) ?          0.0    0.3614
 IC_Cl_super1_blank (micrograms m-3) ?          1.0E-4    0.1011
 IC_Br_super1_blank (micrograms m-3) ?          0.0    0.0
 IC_NO3_super1_blank (micrograms m-3) ?          2.0E-4    0.0475
 IC_total_SO4_super1_blank (micrograms m-3) ?          1.0E-4    0.0542
 IC_Oxalate_super1_blank (micrograms m-3) ?          0.0    0.025
 IC_Na_super1_unc (micrograms m-3) ?          0.0    0.008
 IC_NH4_super1_unc (micrograms m-3) ?          0.0    0.0
 IC_K_super1_unc (micrograms m-3) ?          0.0    0.001
 IC_Mg_super1_unc (micrograms m-3) ?          0.0    0.002
 IC_Ca_super1_unc (micrograms m-3) ?          0.0    0.002
 IC_MSA_super1_unc (micrograms m-3) ?          0.0    0.0
 IC_Cl_super1_unc (micrograms m-3) ?          0.0    0.018
 IC_Br_super1_unc (micrograms m-3) ?          0.0    0.001
 IC_NO3_super1_unc (micrograms m-3) ?          0.0    0.001
 IC_total_SO4_super1_unc (micrograms m-3) ?          0.0    0.004
 IC_Oxalate_super1_unc (micrograms m-3) ?          0.0    0.0
 IC_Na_super1_LOD (micrograms m-3) ?          0.0    0.1448
 IC_NH4_super1_LOD (micrograms m-3) ?          0.0    0.758
 IC_K_super1_LOD (micrograms m-3) ?          0.0    0.0764
 IC_Mg_super1_LOD (micrograms m-3) ?          0.0    0.0354
 IC_Ca_super1_LOD (micrograms m-3) ?          0.0    0.1974
 IC_MSA_super1_LOD (micrograms m-3) ?          0.0    1.1309
 IC_Cl_super1_LOD (micrograms m-3) ?          1.0E-4    0.696
 IC_Br_super1_LOD (micrograms m-3) ?          0.0    1.0E-4
 IC_NO3_super1_LOD (micrograms m-3) ?          1.0E-4    0.1633
 IC_total_SO4_super1_LOD (micrograms m-3) ?          1.0E-4    0.2824
 IC_Oxalate_super1_LOD (micrograms m-3) ?          0.0    0.0899
 IC_Na_super1_flag (IC Na flag, Dp > 1.1um) ?          "0.000"    "M"
 IC_NH4_super1_flag (IC NH4 flag, Dp > 1.1um) ?          "BDL"    "M"
 IC_K_super1_flag (IC K flag, Dp > 1.1um) ?          "BDL"    "M"
 IC_Mg_super1_flag (IC Mg flag, Dp > 1.1um) ?          "BDL"    "M"
 IC_Ca_super1_flag (IC Ca flag, Dp > 1.1um) ?          "BDL"    "M"
 IC_MSA_super1_flag ?          "BDL"    "M"
 IC_Cl_super1_flag (IC Cl flag, Dp > 1.1um) ?          "BDL"    "M"
 IC_Br_super1_flag (IC Br flag, Dp > 1.1um) ?          "BDL"    "M"
 IC_NO3_super1_flag (IC NO3 flag, Dp > 1.1um) ?          "BDL"    "M"
 IC_total_SO4_super1_flag ?          "BDL"    "M"
 IC_Oxalate_super1_flag ?          "BDL"    "M"
 volume_super1_flag (IC volume flag, Dp > 1.1um) ?          "V"    "V"
 mass_super1_flag (IC mass flag, Dp > 1.1um) ?          "M"    "M"
 
Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")

File type: (more information)

(Documentation / Bypass this form ? )
 
(Please be patient. It may take a while to get the data.)


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Station {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Station";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 71.323, 71.323;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -156.6114, -156.611;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 8.7646872e+8, 1.670373988e+9;
    String axis "T";
    String comment "Start time of sampling period";
    String ioos_category "Time";
    String long_name "Start 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";
  }
  Stop_time {
    Float64 actual_range 8.7743466e+8, 1.671343172e+9;
    String comment "Stop time of sampling period";
    String ioos_category "Time";
    String long_name "Stop 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";
  }
  Filter_ID {
    String ioos_category "Identifier";
    String long_name "Filter ID YYYY_julian day_filter number";
  }
  volume {
    Float32 actual_range 3.46, 1131.8;
    String ioos_category "Unknown";
    String long_name "Volume of air sampled";
    String units "m3";
  }
  mass_super1_conc {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 32.11;
    String ioos_category "Unknown";
    String long_name "Total Mass Concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Na_super1_conc {
    Float32 actual_range 2.0e-4, 2.0181;
    String ioos_category "Unknown";
    String long_name "IC Na concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_NH4_super1_conc {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 1.0535;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "IC NH4 concentration, Dp > 1.1um";
    String standard_name "mole_concentration_of_ammonium_in_sea_water";
    String units "micrograms m-3";
  }
  IC_K_super1_conc {
    Float32 actual_range 0.0, 0.1004;
    String ioos_category "Unknown";
    String long_name "IC K concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Mg_super1_conc {
    Float32 _FillValue NaN;
    Float32 actual_range 1.0e-4, 0.2282;
    String ioos_category "Unknown";
    String long_name "IC Mg concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Ca_super1_conc {
    Float32 _FillValue NaN;
    Float32 actual_range 4.0e-4, 2.7609;
    String ioos_category "Unknown";
    String long_name "IC Ca concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_MSA_super1_conc {
    Float32 _FillValue NaN;
    Float32 actual_range 1.0e-4, 0.039;
    String ioos_category "Unknown";
    String long_name "IC MSA concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Cl_super1_conc {
    Float32 actual_range 1.0e-4, 2.3656;
    String ioos_category "Unknown";
    String long_name "IC Cl concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Br_super1_conc {
    Float32 _FillValue NaN;
    Float32 actual_range 1.0e-4, 0.0161;
    String ioos_category "Unknown";
    String long_name "IC Br concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_NO3_super1_conc {
    Float32 actual_range 1.0e-4, 0.6574;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "IC NO3 concentration, Dp > 1.1um";
    String standard_name "mole_concentration_of_nitrate_in_sea_water";
    String units "micrograms m-3";
  }
  IC_total_SO4_super1_conc {
    Float32 actual_range 5.0e-4, 0.6462;
    String ioos_category "Unknown";
    String long_name "IC total SO4 concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Oxalate_super1_conc {
    Float32 actual_range 1.0e-4, 0.025;
    String ioos_category "Unknown";
    String long_name "IC Oxalate concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Na_super1_blank {
    Float32 actual_range 0.0, 0.0652;
    String ioos_category "Statistics";
    String long_name "IC Na annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_NH4_super1_blank {
    Float32 actual_range 0.0, 0.1828;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "IC NH4 annual average blank concentration, Dp > 1.1um";
    String standard_name "mole_concentration_of_ammonium_in_sea_water";
    String units "micrograms m-3";
  }
  IC_K_super1_blank {
    Float32 actual_range 0.0, 0.0062;
    String ioos_category "Statistics";
    String long_name "IC K annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Mg_super1_blank {
    Float32 actual_range 0.0, 0.0043;
    String ioos_category "Statistics";
    String long_name "IC Mg annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Ca_super1_blank {
    Float32 actual_range 0.0, 0.044;
    String ioos_category "Statistics";
    String long_name "IC Ca annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_MSA_super1_blank {
    Float32 actual_range 0.0, 0.3614;
    String ioos_category "Statistics";
    String long_name "IC methanesulfonic acid annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Cl_super1_blank {
    Float32 actual_range 1.0e-4, 0.1011;
    String ioos_category "Statistics";
    String long_name "IC Cl annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Br_super1_blank {
    Float32 actual_range 0.0, 0.0;
    String ioos_category "Statistics";
    String long_name "IC Br annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_NO3_super1_blank {
    Float32 actual_range 2.0e-4, 0.0475;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "IC NO3 annual average blank concentration, Dp > 1.1um";
    String standard_name "mole_concentration_of_nitrate_in_sea_water";
    String units "micrograms m-3";
  }
  IC_total_SO4_super1_blank {
    Float32 actual_range 1.0e-4, 0.0542;
    String ioos_category "Statistics";
    String long_name "IC total SO4 annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Oxalate_super1_blank {
    Float32 actual_range 0.0, 0.025;
    String ioos_category "Statistics";
    String long_name "IC oxalate annual average blank concentration, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Na_super1_unc {
    Float32 actual_range 0.0, 0.008;
    String ioos_category "Unknown";
    String long_name "IC Na 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_NH4_super1_unc {
    Float32 actual_range 0.0, 0.0;
    String ioos_category "Unknown";
    String long_name "IC NH4 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_K_super1_unc {
    Float32 actual_range 0.0, 0.001;
    String ioos_category "Unknown";
    String long_name "IC K 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Mg_super1_unc {
    Float32 actual_range 0.0, 0.002;
    String ioos_category "Unknown";
    String long_name "IC Mg 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Ca_super1_unc {
    Float32 actual_range 0.0, 0.002;
    String ioos_category "Unknown";
    String long_name "IC Ca 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_MSA_super1_unc {
    Float32 actual_range 0.0, 0.0;
    String ioos_category "Unknown";
    String long_name "IC methanesulfonic acid 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Cl_super1_unc {
    Float32 actual_range 0.0, 0.018;
    String ioos_category "Unknown";
    String long_name "IC Cl 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Br_super1_unc {
    Float32 actual_range 0.0, 0.001;
    String ioos_category "Unknown";
    String long_name "IC Br 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_NO3_super1_unc {
    Float32 actual_range 0.0, 0.001;
    String ioos_category "Unknown";
    String long_name "IC NO3 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_total_SO4_super1_unc {
    Float32 actual_range 0.0, 0.004;
    String ioos_category "Unknown";
    String long_name "IC total sulfate 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Oxalate_super1_unc {
    Float32 actual_range 0.0, 0.0;
    String ioos_category "Unknown";
    String long_name "IC oxalate 1-sigma uncertainty, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Na_super1_LOD {
    Float32 actual_range 0.0, 0.1448;
    String ioos_category "Unknown";
    String long_name "IC Na limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_NH4_super1_LOD {
    Float32 actual_range 0.0, 0.758;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "IC NH4 limit of detection, Dp > 1.1um";
    String standard_name "mole_concentration_of_ammonium_in_sea_water";
    String units "micrograms m-3";
  }
  IC_K_super1_LOD {
    Float32 actual_range 0.0, 0.0764;
    String ioos_category "Unknown";
    String long_name "IC K limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Mg_super1_LOD {
    Float32 actual_range 0.0, 0.0354;
    String ioos_category "Unknown";
    String long_name "IC Mg limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Ca_super1_LOD {
    Float32 actual_range 0.0, 0.1974;
    String ioos_category "Unknown";
    String long_name "IC Ca limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_MSA_super1_LOD {
    Float32 actual_range 0.0, 1.1309;
    String ioos_category "Unknown";
    String long_name "IC methanesulfonic acid limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Cl_super1_LOD {
    Float32 actual_range 1.0e-4, 0.696;
    String ioos_category "Unknown";
    String long_name "IC Cl limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Br_super1_LOD {
    Float32 actual_range 0.0, 1.0e-4;
    String ioos_category "Unknown";
    String long_name "IC Br limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_NO3_super1_LOD {
    Float32 actual_range 1.0e-4, 0.1633;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "IC NO3 limit of detection, Dp > 1.1um";
    String standard_name "mole_concentration_of_nitrate_in_sea_water";
    String units "micrograms m-3";
  }
  IC_total_SO4_super1_LOD {
    Float32 actual_range 1.0e-4, 0.2824;
    String ioos_category "Unknown";
    String long_name "IC SO4 limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Oxalate_super1_LOD {
    Float32 actual_range 0.0, 0.0899;
    String ioos_category "Unknown";
    String long_name "IC oxalate limit of detection, Dp > 1.1um";
    String units "micrograms m-3";
  }
  IC_Na_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC Na flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_NH4_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC NH4 flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_K_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC K flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_Mg_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC Mg flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_Ca_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC Ca flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_MSA_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC methanesulfonic acid flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_Cl_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC Cl flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_Br_super1_flag {
    String flag_meanings "volume_>_2.2, missing, below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC Br flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_NO3_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC NO3 flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_total_SO4_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC SO4 flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  IC_Oxalate_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC oxalate flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  volume_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC volume flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
  mass_super1_flag {
    String flag_meanings "volume_<_2.2 missing below_detectable_limit";
    String flag_values "'V', 'M', 'BDL'";
    String ioos_category "Quality";
    String long_name "IC mass flag, Dp > 1.1um";
    String standard_name "status_flag";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "Station";
    String comment 
"The goal of this study is to document changes over time in ion and trace element aerosol concentrations at the Barrow Long Term Measurement Station.  The measurements began in 1997.  Funding for this project has come from NOAA, DOE, and beginning in 2002, NSF.

Sample Collection:
Submicron samples are collected on a 24-96 hour basis depending on season and aerosol loading. Supermicron samples are collected for 7 to 28 day periods, also depending on the season. The sample air volume minimum for analysis is 2.2 m^3.

The submicron - supermicron split is made with a Berner-type cascade impactor having a D50, aero of 1.0 um at the RH of the sample stream. Hence, the submicron data are for particle sizes < 1.0 um and supermicron data are for particle sizes > 1.0 um and < 10 um. The RH of the sampled aerosol is < 40%.

Ion Analysis:
All samples have been analyzed by ion chromatography for MSA-, Cl-, Br-, NO3-, SO4-2, oxalate, Na+, NH4+, K+, Mg2+, and Ca+2. Submicron samples are analyzed for total mass by gravimetric analysis at 55 +/- 5% RH. All ion and mass concentrations are given in ug/m3 at STP. More details of the sampling and IC and gravimetric analysis methods can be found in Quinn et al., J. Geophys. Res., 105, 6785 - 6805, 2000.

We define the limit of detection at the 95% (2-sigma) confidence level for ion chromatography to be consistent with the historical record at the Barrow Observatory. The final concentration has been adjusted by subtracting out the average annual blank value for each ion. Ion chromatography uncertainty was determined by triplicate analysis of a random sample. Annually averaged blanks, limit of detection (LOD: blank+2-sigma), and repetitive analysis uncertainty (1-sigma) are in ug/m3. The LOD for years prior to 2015 is based on the values presented in Quinn et al., J. Geophys. Res., 105, 6785 - 6805, 2000. After 2015, the blank and LOD values are calculated using the actual values collected during the year.

Trace Element Analysis:
Winter/Spring Barrow submicron samples were also analyzed by Xray fluorescence (XRF) for Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Br, Sr, and Pb. Element concentrations are given in ug/m3 at STP. Uncertainty (1-sigma) for the XRF data is derived from four different effects (calibration, counting statistics, peak overlap correction, and absorption). It is listed for each sample in the file in ug/m3. The detection limit for XRF data is 3-sigma, in ug/m3. The final concentration has been adjusted to subtract out the average blank value for each element. The XRF filter area is 11.3 cm2. More details of the XRF analysis can be found in Buck, N.J., P.M. Barrett, P.L. Morton, W.M. Landing, and J.A. Resing, Energy dispersive X-ray fluorescence methodology and analysis of suspended particulate matter in seawater for trace element compositions and an intercomparison with high-resolution inductively coupled plasma-mass spectrometry. Limnol. Oceanogr. Methods, 19(6), 401-415, doi: 10.1002/lom3.10433, 2021.

Dataset Descriptors:
There are separate files for submicron and supermicron data.
The column names indicate the instrument used (IC or XRF), the element or ion measured, the size cut, and the measured concentration or blank concentration or uncertainty of the analysis.
Where values are absent, the following flags indicate:
1) V- missing volume or volume below 2.2 m^3,
2) BDL - below the detection limit listed,
3) M- missing/not analyzed.

The long term dataset began in 1997.  The full data set can be accessed at:
https://data.pmel.noaa.gov/pmel/erddap/tabledap/
In the above ERDDAP server the Aerosol Chemistry Station Data have the following \"Titles\",
Long-term Air Chemistry Monitoring Experiment-Submicron
Long-term Air Chemistry Monitoring Experiment-Supermicron";
    String contact "patricia.k.quinn@noaa.gov";
    String Conventions "COARDS, CF-1.6, ACDD-1.3, NCCSV-1.1";
    String creator_email "patricia.k.quinn@noaa.gov";
    String creator_name "Patricia K Quinn";
    String creator_type "person";
    String creator_url "https://www.pmel.noaa.gov/";
    Float64 Easternmost_Easting -156.611;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 71.323;
    Float64 geospatial_lat_min 71.323;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -156.611;
    Float64 geospatial_lon_min -156.6114;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-05-29T02:27:21Z (local files)
2024-05-29T02:27:21Z https://data.pmel.noaa.gov/pmel/erddap/tabledap/station_barrow_supermicron_chemistry.html";
    String infoUrl "https://saga.pmel.noaa.gov/data/stations/";
    String institution "NOAA PMEL Atmospheric Chemistry";
    String keywords "1-sigma, 1.1um, acid, air, ammonia, ammonium, annual, atmospheric, average, blank, chemistry, concentration, data, datetime, day, detection, dissolved, dissolved nutrients, earth, Earth Science > Oceans > Ocean Chemistry > Ammonia, Earth Science > Oceans > Ocean Chemistry > Nitrate, environmental, experiment, experiment-supermicron, filter, Filter_ID, flag, IC_Br_super1_blank, IC_Br_super1_conc, IC_Br_super1_flag, IC_Br_super1_LOD, IC_Br_super1_unc, IC_Ca_super1_blank, IC_Ca_super1_conc, IC_Ca_super1_flag, IC_Ca_super1_LOD, IC_Ca_super1_unc, IC_Cl_super1_blank, IC_Cl_super1_conc, IC_Cl_super1_flag, IC_Cl_super1_LOD, IC_Cl_super1_unc, IC_K_super1_blank, IC_K_super1_conc, IC_K_super1_flag, IC_K_super1_LOD, IC_K_super1_unc, IC_Mg_super1_blank, IC_Mg_super1_conc, IC_Mg_super1_flag, IC_Mg_super1_LOD, IC_Mg_super1_unc, IC_MSA_super1_blank, IC_MSA_super1_conc, IC_MSA_super1_flag, IC_MSA_super1_LOD, IC_MSA_super1_unc, IC_Na_super1_blank, IC_Na_super1_conc, IC_Na_super1_flag, IC_Na_super1_LOD, IC_Na_super1_unc, IC_NH4_super1_blank, IC_NH4_super1_conc, IC_NH4_super1_flag, IC_NH4_super1_LOD, IC_NH4_super1_unc, IC_NO3_super1_blank, IC_NO3_super1_conc, IC_NO3_super1_flag, IC_NO3_super1_LOD, IC_NO3_super1_unc, IC_Oxalate_super1_blank, IC_Oxalate_super1_conc, IC_Oxalate_super1_flag, IC_Oxalate_super1_LOD, IC_Oxalate_super1_unc, IC_total_SO4_super1_blank, IC_total_SO4_super1_conc, IC_total_SO4_super1_flag, IC_total_SO4_super1_LOD, IC_total_SO4_super1_unc, identifier, julian, laboratory, latitude, limit, long, long-term, longitude, marine, mass, mass_super1_conc, mass_super1_flag, methanesulfonic, mole, mole_concentration_of_ammonium_in_sea_water, mole_concentration_of_nitrate_in_sea_water, monitoring, msa, n02, nh4, nitrate, no3, noaa, number, nutrients, ocean, oceans, oxalate, pacific, pmel, quality, sampled, science, sea, seawater, sigma, so4, start, station, statistics, status, status_flag, stop, Stop_time, sulfate, supermicron, term, time, total, uncertainty, volume, volume_super1_flag, water, yyyy";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"Data Licenses / Data Usage Restrictions
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.

Unless otherwise noted, data served through this ERDDAP server are 
not quality controlled. Users may need to do quality control when using 
these data. These data are made available at the users own risk.";
    Float64 Northernmost_Northing 71.323;
    String product_version "0";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 71.323;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String subsetVariables "Station, latitude, longitude";
    String summary "Long-term Air Chemistry Monitoring Experiment-Supermicron";
    String time_coverage_end "2022-12-07T00:46:28Z";
    String time_coverage_start "1997-10-10T07:32:00Z";
    String title "Long-term Air Chemistry Monitoring Experiment-Supermicron";
    Float64 Westernmost_Easting -156.6114;
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection constraints (external link).

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.


 
ERDDAP, Version 2.18
Disclaimers | Privacy Policy | Contact