ERDDAP > info > ACG_WACS_RHBrown_dms

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		files	PMEL Atmospheric Chemistry WACS DMS data		F   I   M	background			NOAA	ACG_WACS_RHBrown_dms

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	cdm_data_type	String	Trajectory
attribute	NC_GLOBAL	cdm_trajectory_variables	String	trajectory_id
attribute	NC_GLOBAL	comment	String	Seawater DMS: Seawater entered the ship at the bow, 5.3 m below the ship waterline, and was pumped to the main lab. Every 30 minutes a 5 ml water sample was valved from the water line directly into a Teflon gas stripper. The sample was purged with hydrogen at 80 ml/min for 5 min. DMS and other sulfur gases in the hydrogen purge gas were collected on a Tenax filled trap, held at -5 deg C. During the sample trapping period, 6.2 pmoles of methylethyl sulfide (MES) were valved into the hydrogen stream as an internal standard. At the end of the sampling/purge period the trap was rapidly heated to +120 deg C and the sulfur gases were desorbed from the trap, separated on a DB-1 megabore fused silica column held at 70 deg C, and quantified with a sulfur chemiluminesence detector. Between each water sample the system analyzed either a DMS standard or a system blank. The system was calibrated using gravimetrically calibrated DMS and MES permeation tubes. The precision of the analysis has been shown to be ± 2% based on replicate analysis of a single water sample at 3.6 nM DMS. The automated DMS system is described in greater detail in Bates et al. (J. Geophys. Res., 103, 16369-16383, 1998; Tellus, 52B, 258-272, 2000). The major improvements since these papers are a new automation-data system and a more reliable cold trap consisting of an electrically heated stainless steel tube embedded in an aluminum block that is cooled to -5 deg C with a thermoelectric cooling chip.
attribute	NC_GLOBAL	contributor_name	String	Coffman, Derek/NOAA-PMEL/Address: 7600 Sand Pt. Wy. NE,Seattle,WA 98115 /email: derek.coffman@noaa.gov
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3, NCCSV-1.0
attribute	NC_GLOBAL	creator_email	String	derek.coffman at noaa.gov
attribute	NC_GLOBAL	creator_name	String	Coffman, Derek
attribute	NC_GLOBAL	creator_url	String	https://www.pmel.noaa.gov/
attribute	NC_GLOBAL	dimensions	String	time=352
attribute	NC_GLOBAL	Easternmost_Easting	double	-64.1687
attribute	NC_GLOBAL	featureType	String	Trajectory
attribute	NC_GLOBAL	geospatial_lat_max	double	42.3022
attribute	NC_GLOBAL	geospatial_lat_min	double	33.363
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-64.1687
attribute	NC_GLOBAL	geospatial_lon_min	double	-70.5777
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	18.0
attribute	NC_GLOBAL	geospatial_vertical_min	double	18.0
attribute	NC_GLOBAL	geospatial_vertical_positive	String	up
attribute	NC_GLOBAL	geospatial_vertical_units	String	m
attribute	NC_GLOBAL	infoUrl	String	https://www.pmel.noaa.gov/acg/data/index.html
attribute	NC_GLOBAL	institution	String	NOAA
attribute	NC_GLOBAL	keywords	String	above, altitude, atmosphere, atmospheric, chemistry, concentration, data, datetime, dms, dms_seawater, duration, earth, Earth Science > Atmosphere > Altitude > Station Height, environmental, height, identifier, laboratory, latitude, level, longitude, marine, mean, noaa, pacific, pmel, science, sea, seawater, station, time, trajectory, trajectory_id, wacs, water
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	These data were produced by NOAA and are not subject to copyright protection in the United States. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0-1.0).
attribute	NC_GLOBAL	Northernmost_Northing	double	42.3022
attribute	NC_GLOBAL	platform	String	RHBrown
attribute	NC_GLOBAL	product_version	String	0
attribute	NC_GLOBAL	project	String	WACS
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	33.363
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v70
attribute	NC_GLOBAL	subsetVariables	String	trajectory_id, duration, altitude
attribute	NC_GLOBAL	summary	String	WACS 2014 Objectives Multiple deployments and recoveries of an in situ sea spray particle generator, Sea Sweep, for characterization of properties and cloud-nucleating ability of nascent ocean-derived aerosol. In addition, atmospheric particles and gases and surface seawater will be sampled to assess the impact of ocean emissions on atmospheric composition.
attribute	NC_GLOBAL	time_coverage_end	String	2012-08-27T11:30:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2012-08-19T20:00:00Z
attribute	NC_GLOBAL	title	String	PMEL Atmospheric Chemistry WACS DMS data
attribute	NC_GLOBAL	Westernmost_Easting	double	-70.5777
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.3454064E9, 1.346067E9
attribute	time	axis	String	T
attribute	time	comment	String	Start of sampling period
attribute	time	coords	String	time
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Datetime UTC
attribute	time	source_name	String	datetime_utc
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	time_precision	String	1970-01-01T00:00:00Z
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	coords	String	time
attribute	trajectory_id	ioos_category	String	Identifier
attribute	trajectory_id	long_name	String	Trajectory ID
variable	duration		int
attribute	duration	_FillValue	int	2147483647
attribute	duration	actual_range	int	60, 60
attribute	duration	coords	String	time
attribute	duration	ioos_category	String	Time
attribute	duration	long_name	String	Duration
attribute	duration	units	String	second
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	actual_range	double	33.363, 42.3022
attribute	latitude	axis	String	Y
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	coords	String	time
attribute	latitude	instrument	String	GPS
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	source	String	surface observation
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	actual_range	double	-70.5777, -64.1687
attribute	longitude	axis	String	X
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	coords	String	time
attribute	longitude	instrument	String	GPS
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	source	String	surface observation
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	altitude		double
attribute	altitude	_CoordinateAxisType	String	Height
attribute	altitude	_CoordinateZisPositive	String	up
attribute	altitude	actual_range	double	18.0, 18.0
attribute	altitude	axis	String	Z
attribute	altitude	colorBarMinimum	double	0.0
attribute	altitude	coords	String	time
attribute	altitude	ioos_category	String	Location
attribute	altitude	long_name	String	height above mean sea level
attribute	altitude	positive	String	up
attribute	altitude	standard_name	String	altitude
attribute	altitude	units	String	m
attribute	altitude	valid_min	double	0.0
variable	dms_seawater		double
attribute	dms_seawater	actual_range	double	0.44, 8.34
attribute	dms_seawater	coords	String	time
attribute	dms_seawater	instrument	String	Custom purge and trap gas chromatograph
attribute	dms_seawater	ioos_category	String	Unknown
attribute	dms_seawater	long_name	String	Seawater DMS concentration
attribute	dms_seawater	source	String	surface ocean observation
attribute	dms_seawater	units	String	nmol L-1

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