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Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL _NCProperties String version=2,netcdf=4.7.4,hdf5=1.10.6
attribute NC_GLOBAL cdm_data_type String Trajectory
attribute NC_GLOBAL cdm_trajectory_variables String trajectory_id
attribute NC_GLOBAL comment String 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.
attribute NC_GLOBAL contributor_name String Coffman, Derek;Johnson, James;Quinn, Patricia;Bates, Tim;Upchurch, Lucia
attribute NC_GLOBAL Conventions String CF-1.6, COARDS, ACDD-1.3
attribute NC_GLOBAL creator_email String james.e.johnson at noaa.gov
attribute NC_GLOBAL creator_name String Johnson, James
attribute NC_GLOBAL creator_url String https://saga.pmel.noaa.gov (external link)
attribute NC_GLOBAL date_created String 2020-11-30T17:21:04Z
attribute NC_GLOBAL Easternmost_Easting double -50.9607
attribute NC_GLOBAL featureType String Trajectory
attribute NC_GLOBAL geospatial_lat_max double 15.748
attribute NC_GLOBAL geospatial_lat_min double 13.1416
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -50.9607
attribute NC_GLOBAL geospatial_lon_min double -59.072
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL history String file created by NOAA/PMEL/ACG
attribute NC_GLOBAL infoUrl String https://saga.pmel.noaa.gov (external link)
attribute NC_GLOBAL institution String NOAA PMEL Atmospheric Chemistry
attribute NC_GLOBAL keywords String 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
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String 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.
attribute NC_GLOBAL Northernmost_Northing double 15.748
attribute NC_GLOBAL platform String RHBrown
attribute NC_GLOBAL product_version String 0
attribute NC_GLOBAL project String ATOMIC
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 13.1416
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL subsetVariables String trajectory_id
attribute NC_GLOBAL summary String 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
attribute NC_GLOBAL time_coverage_end String 2020-02-09T17:38:00Z
attribute NC_GLOBAL time_coverage_start String 2020-01-08T04:02:00Z
attribute NC_GLOBAL title String PMEL Atmospheric Chemistry ATOMIC Impactor collected OCEC
attribute NC_GLOBAL Westernmost_Easting double -59.072
attribute NC_GLOBAL Westernnmost_Easting double -59.072
variable time double
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.57845612E9, 1.58126988E9
attribute time axis String T
attribute time calendar String gregorian
attribute time colorBarMaximum double 1.582E9
attribute time colorBarMinimum double 1.578E9
attribute time ioos_category String Time
attribute time long_name String Midpoint Time of Sample Period
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
variable trajectory_id String
attribute trajectory_id cf_role String trajectory_id
attribute trajectory_id ioos_category String Identifier
attribute trajectory_id long_name String trajectory id
variable latitude double
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double -1.0E34
attribute latitude actual_range double 13.1416, 15.748
attribute latitude axis String Y
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude comment String 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.
attribute latitude epic_code String 500
attribute latitude instrument String GPS
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
attribute latitude valid_max double 90.0
attribute latitude valid_min double -90.0
variable longitude double
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double -1.0E34
attribute longitude actual_range double -59.072, -50.9607
attribute longitude axis String X
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude comment String 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.
attribute longitude epic_code String 502
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
attribute longitude valid_max double 180.0
attribute longitude valid_min double -180.0
variable OC_sub1 double
attribute OC_sub1 _FillValue double -1.0E34
attribute OC_sub1 actual_range double 0.19, 1.64
attribute OC_sub1 colorBarMaximum double 2.0
attribute OC_sub1 colorBarMinimum double 0.0
attribute OC_sub1 epic_code String 1959
attribute OC_sub1 instrument String Impactor Dp < 1um (13); Impactor Dp < 1um +denduder (14); Sunset Laboratory thermal/optical analyzer (sn: )
attribute OC_sub1 ioos_category String Ocean Color
attribute OC_sub1 long_name String Organic Carbon Concentration in Dp < 1.1um particles in air
attribute OC_sub1 lower_limit_of_detection String 0.1 to 0.8 ug/m3
attribute OC_sub1 missing_value double -999.0
attribute OC_sub1 source String surface observation
attribute OC_sub1 standard_name String mass_concentration_of_primary_particulate_organic_matter_dry_aerosol_particles_in_air
attribute OC_sub1 uncertainty String +/- 13%
attribute OC_sub1 units String micrograms m-3
variable OC_super1 double
attribute OC_super1 _FillValue double -1.0E34
attribute OC_super1 actual_range double 0.0, 1.3
attribute OC_super1 epic_code String 1960
attribute OC_super1 instrument String Impactor Dp < 1um (13); Impactor Dp < 1um +denduder (14); Impactor Dp<10um (10) Sunset Laboratory thermal/optical analyzer (sn: )
attribute OC_super1 ioos_category String Ocean Color
attribute OC_super1 long_name String Organic Carbon Concentration in 1.1um < Dp < 10um particles in air
attribute OC_super1 lower_limit_of_detection String 0.1 to 0.8 ug/m3
attribute OC_super1 missing_value double -999.0
attribute OC_super1 source String surface observation
attribute OC_super1 standard_name String mass_concentration_of_primary_particulate_organic_matter_dry_aerosol_particles_in_air
attribute OC_super1 uncertainty String +/- 13%
attribute OC_super1 units String micrograms m-3
variable EC_sub1 double
attribute EC_sub1 _FillValue double -1.0E34
attribute EC_sub1 actual_range double 0.0, 0.61
attribute EC_sub1 epic_code String 1962
attribute EC_sub1 instrument String Impactor Dp < 1um (13); Impactor Dp < 1um +denduder (14); Sunset Laboratory thermal/optical analyzer (sn: )
attribute EC_sub1 ioos_category String Unknown
attribute EC_sub1 long_name String Elemental Carbon Concentration in Dp < 1.1um particles in air
attribute EC_sub1 lower_limit_of_detection String 0.015 to 0.12 ug/m3
attribute EC_sub1 missing_value double -999.0
attribute EC_sub1 source String surface observation
attribute EC_sub1 uncertainty String +/- 9%
attribute EC_sub1 units String micrograms m-3
variable start_time double
attribute start_time actual_range double 1.57843452E9, 1.581204E9
attribute start_time calendar String gregorian
attribute start_time colorBarMaximum double 1.582E9
attribute start_time colorBarMinimum double 1.578E9
attribute start_time ioos_category String Time
attribute start_time long_name String Start Time of Sample Period
attribute start_time standard_name String time
attribute start_time time_origin String 01-JAN-1970 00:00:00
attribute start_time units String seconds since 1970-01-01T00:00:00Z
variable stop_time double
attribute stop_time actual_range double 1.57847772E9, 1.58133576E9
attribute stop_time calendar String gregorian
attribute stop_time colorBarMaximum double 1.582E9
attribute stop_time colorBarMinimum double 1.578E9
attribute stop_time ioos_category String Time
attribute stop_time long_name String Stop Time of Sample Period
attribute stop_time standard_name String time
attribute stop_time time_origin String 01-JAN-1970 00:00:00
attribute stop_time units String seconds since 1970-01-01T00:00:00Z
variable sample_number double
attribute sample_number _FillValue double -1.0E34
attribute sample_number actual_range double 1.0, 27.0
attribute sample_number colorBarMaximum double 100.0
attribute sample_number colorBarMinimum double 0.0
attribute sample_number ioos_category String Statistics
attribute sample_number long_name String Sample Number
attribute sample_number missing_value double -999.0
attribute sample_number units String 1

 
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