ERDDAP > info > EUREC4A_ATOMIC_RonBrown_PMEL_OCEC_v0

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
	set	data	graph			PMEL Atmospheric Chemistry ATOMIC Impactor collected OCEC		F   I   M	background			NOAA PMEL Atmosph...	EUREC4A_ATOMIC_RonBrown_PMEL_OCEC_v0

The Dataset's Variables and Attributes

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
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
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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