ERDDAP > info > bcodmo_dataset_781633

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	Apparent Quantum Yields for the Photochemical Formation of Carbonyl Compounds in Seawater from the R/V Endeavor EN589 in the Northwest Atlantic Ocean from September to October 2016.		I   M	background			BCO-DMO	bcodmo_dataset_781633

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson
attribute	NC_GLOBAL	acquisition_description	String	Seawater sampling and Experimental Set up.\u00a0 Seawater was gravity filtered directly from the Niskin bottle through a 0.2-\u03bcm POLYCAP 75 AS Nylon filter (Whatman) into two 2 L Qorpak glass bottles previously rinsed by Milli Q water and muffled at 550 \u02daC for 8 h. Each bottle was filled leaving 3\u20135 mL headspace, sealed with a Teflon-lined silicone screw cap, and stored at 4 \u00b0C in the dark until analyzed in Syracuse, NY. POLYCAP filters were cleaned prior to use by alternating rinses of acetonitrile and Milli Q water followed by extensive flushing with Milli Q. Prior to irradiation experiments, a Milli Q sample or 0.2 \u03bcm-filtered seawater sample was pneumatically pushed through 1/8\u201d O.D. Teflon tubing with ultra-high purity helium (99.999%) into a rectangular quartz cell (4 mL capacity, 1 cm pathlength, Spectrocell, Inc.) for at least 10 min at a flow rate of 2 mL min-1. The quartz cell was periodically inverted to remove residual air bubbles.\u00a0 The quartz cell was sealed with a screw cap containing a Teflon-lined silicone septum insert. Once the quartz cell was filled with a sample, it was placed into an enclosed temperature-controlled cell holder equipped with a stirrer.\u00a0 All irradiations were performed using a model QP-SX10001, 1000 W xenon lamp (Superior Quartz Products, Inc.) along with a GM 252 monochromator (Spectral Energy, Corp.).\u00a0 A 10 nm bandwidth was used for irradiations <330 nm and a 20 nm bandwidth was used for longer wavelengths.\u00a0 A longpass filter with a 307 nm cutoff (50% transmission at 307 nm) was placed in the optical path directly after the monochromator for wavelengths >330 nm.\u00a0 Irradiation times varied from 1 to 36 h and were chosen depending on the wavelength of the irradiation and the absorbance of the seawater sample. Dark controls were incubated in the cell holder for up to 36 h. Except when noted, the cell holder temperature was set at 20 \u00b0C for all irradiations. Carbonyl Determination. A 2.2 mL aliquot of the irradiated seawater sample or dark control was added to a 20 L aliquot of the 2,4-dinitrophenylhydrazine (DNPH) reagent in a ~2.2 mL Qorpak vial that was capped tightly with no headspace.\u00a0 The lid of the cap contained a Teflon-lined silicone septum.\u00a0 All samples were reacted at room temperature for a minimum of 12 h and a maximum of 48 h. Derivatized standards (Sigma-Aldrich), dark controls, and samples were analyzed using a Shimadzu Prominence high performance liquid chromatography (HPLC) system with a model SPD-20A/V UV-Vis absorbance detector set in dual wavelength mode at 371 and 435 nm. The HPLC column consisted of a Waters 8\u00d7100 mm Nova-Pak cartridge with 4 \u03bcm C18 packing placed in a Waters RCM radial compression cartridge holder (Waters Associates, Milford, MA). The mobile phase consisted of solvent A (Milli Q) and solvent B (acetonitrile). The elution program was isocratic at 30% B for 3 min, 30 to 55% B in 5 min, isocratic at 55% B for 2 min, 55 to 90% B in 6 min, isocratic at 90% B for 5 min, 90% B to 30% B in 1 min, followed by column equilibration to the initial mobile phase composition for 15 min. All samples were injected using a 1.25 mL injection loop. The flow rate was 1.5 mL min-1 and the column oven temperature was 40 \u02daC.\u00a0 The sample analysis time was 37 min. AQY method. AQY was calculated by dividing the moles of carbonyl compounds produced by the moles of photons absorbed by seawater. Refer to Zhu & Kieber (2018, 2019) for details regarding AQY determination, seawater absorptivity, and photon flux of the monochromatic irradiation.
attribute	NC_GLOBAL	awards_0_award_nid	String	708309
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1536608
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1536608
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	51517
attribute	NC_GLOBAL	awards_1_award_nid	String	708317
attribute	NC_GLOBAL	awards_1_award_number	String	OCE-1536605
attribute	NC_GLOBAL	awards_1_data_url	String	https://www.nsf.gov/awardsearch/showAward?AWD_ID=1536605
attribute	NC_GLOBAL	awards_1_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_1_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_1_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_1_program_manager	String	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_1_program_manager_nid	String	51517
attribute	NC_GLOBAL	awards_2_award_nid	String	708320
attribute	NC_GLOBAL	awards_2_award_number	String	OCE-1536674
attribute	NC_GLOBAL	awards_2_data_url	String	https://www.nsf.gov/awardsearch/showAward?AWD_ID=1536674
attribute	NC_GLOBAL	awards_2_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_2_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_2_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_2_program_manager	String	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_2_program_manager_nid	String	51517
attribute	NC_GLOBAL	awards_3_award_nid	String	708323
attribute	NC_GLOBAL	awards_3_award_number	String	OCE-1536597
attribute	NC_GLOBAL	awards_3_data_url	String	https://www.nsf.gov/awardsearch/showAward?AWD_ID=1536597
attribute	NC_GLOBAL	awards_3_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_3_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_3_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_3_program_manager	String	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_3_program_manager_nid	String	51517
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Apparent Quantum Yields PI: David Kieber Data Version 1: 2019-11-15
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2019-11-14T13:08:27Z
attribute	NC_GLOBAL	date_modified	String	2019-11-22T11:15:03Z
attribute	NC_GLOBAL	defaultDataQuery	String	&amp;time&lt;now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.781633.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-64.7045
attribute	NC_GLOBAL	geospatial_lat_max	double	41.4013
attribute	NC_GLOBAL	geospatial_lat_min	double	35.0118
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-64.7045
attribute	NC_GLOBAL	geospatial_lon_min	double	-71.17943
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	5.8
attribute	NC_GLOBAL	geospatial_vertical_min	double	5.0
attribute	NC_GLOBAL	geospatial_vertical_positive	String	down
attribute	NC_GLOBAL	geospatial_vertical_units	String	m
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/781633
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	HPLC
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Shimadzu Prominence high performance liquid chromatography (HPLC) system with a model SPD-20A/V UV-Vis absorbance detector set in dual wavelength mode at 371 and 435 nm.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	781642
attribute	NC_GLOBAL	instruments_0_description	String	A High-performance liquid chromatograph (HPLC) is a type of liquid chromatography used to separate compounds that are dissolved in solution. HPLC instruments consist of a reservoir of the mobile phase, a pump, an injector, a separation column, and a detector. Compounds are separated by high pressure pumping of the sample mixture onto a column packed with microspheres coated with the stationary phase. The different components in the mixture pass through the column at different rates due to differences in their partitioning behavior between the mobile liquid phase and the stationary phase.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB11/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	High Performance Liquid Chromatograph
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	506
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Shimadzu Prominence high performance liquid chromatography (HPLC) system
attribute	NC_GLOBAL	keywords	String	acetaldehyde, aqy, AQY_SetUp, bco, bco-dmo, biological, cast, Cast_ID_YYJSG, chemical, data, dataset, date, depth, Depth_Sample_Collected, dmo, erddap, glyoxal, latitude, longitude, management, methylglyoxal, oceanography, office, preliminary, sample, set, station, temperature, time, wavelength, yyjsg
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/781633/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/781633
attribute	NC_GLOBAL	Northernmost_Northing	double	41.4013
attribute	NC_GLOBAL	param_mapping	String	{'781633': {'Latitude': 'flag - latitude', 'Depth_Sample_Collected': 'flag - depth', 'Longitude': 'flag - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/781633/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	State University of New York ESF
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	SUNY ESF
attribute	NC_GLOBAL	people_0_person_name	String	David J. Kieber
attribute	NC_GLOBAL	people_0_person_nid	String	544597
attribute	NC_GLOBAL	people_0_role	String	Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	State University of New York ESF
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	SUNY ESF
attribute	NC_GLOBAL	people_1_person_name	String	Yuting Zhu
attribute	NC_GLOBAL	people_1_person_nid	String	781645
attribute	NC_GLOBAL	people_1_role	String	Contact
attribute	NC_GLOBAL	people_1_role_type	String	related
attribute	NC_GLOBAL	people_2_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_2_person_name	String	Karen Soenen
attribute	NC_GLOBAL	people_2_person_nid	String	748773
attribute	NC_GLOBAL	people_2_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	project	String	Refractory DOC Recycling
attribute	NC_GLOBAL	projects_0_acronym	String	Refractory DOC Recycling
attribute	NC_GLOBAL	projects_0_description	String	The oceans hold a massive quantity of organic carbon that is greater than all terrestrial organic carbon biomass combined. Nearly all marine organic carbon is dissolved and more than 95% is refractory, and cycled through the oceans several times before complete removal. Refractory dissolved organic carbon (RDOC) concentrations are uniform with depth in the water column and represent the "background" carbon present throughout the oceans. However, very little is known regarding RDOC production and removal processes. One potential removal pathway is through adsorption of RDOC onto surfaces of rising bubbles produced by breaking waves and ejection via bubble bursting into the atmosphere. Building on prior research, the investigators will evaluate the importance of ocean- atmosphere processing in recycling marine RDOC during a research cruise in the northwestern Atlantic Ocean. Results of the research will provide important insights regarding the coupled ocean-atmosphere loss of RDOC, thereby improving understanding of and ability to predict the role of RDOC in oceanic and atmospheric biogeochemistry, the global carbon cycle, and Earth's climate. The research will involve three early career faculty, and will provide training for undergraduate and graduate researchers. Recent results based on a limited set of observations indicate that the organic matter (OM) associated with primary marine aerosol (PMA) produced by bursting bubbles from breaking waves at the sea surface is comprised partly to wholly of RDOC rather than OM of recent biological origin as has been widely assumed. The injection of RDOC into the atmosphere in association with PMA and its subsequent photochemical oxidation is a potentially important and hitherto unrecognized sink for RDOC in the oceans of sufficient magnitude to close the marine carbon budget and help resolve a long-standing conundrum regarding removal mechanisms for marine RDOC. This project will involve a shipboard investigation and modeling study to (1) quantify the relative contributions of marine refractory dissolved organic carbon (RDOC) to primary marine aerosol organic matter (PMA OM) produced from near-surface seawater in biologically productive and oligotrophic regions and from North Atlantic Deep Water, and to (2) determine the importance of atmospheric photochemical processing as a recycling pathway for RDOC. To test these hypotheses, a high-capacity aerosol generator will be deployed at four hydrographic stations in the NW Atlantic Ocean to characterize (1) the natural abundance of 14C in PMA and in surface and deep seawater; (2) the surface tension and physical properties of bubble plumes; (3) size-resolved production fluxes, chemical composition, organic carbon enrichments, spectral absorbance, and photochemical evolution of PMA; and (4) the carbon content, optical properties, and physical properties of seawater. The importance of RDOC recycling via PMA production and photochemical evolution will be interpreted with model calculations. EN589 Cruise Track
attribute	NC_GLOBAL	projects_0_end_date	String	2018-12
attribute	NC_GLOBAL	projects_0_geolocation	String	Northwest Atlantic Ocean
attribute	NC_GLOBAL	projects_0_name	String	Collaborative Research: Coupled Ocean-Atmosphere Recycling of Refractory Dissolved Organic Carbon in Seawater
attribute	NC_GLOBAL	projects_0_project_nid	String	708310
attribute	NC_GLOBAL	projects_0_start_date	String	2015-09
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	35.0118
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Apparent Quantum Yields for the Photochemical Formation of Carbonyl Compounds in Seawater from the R/V Endeavor EN589 in the Northwest Atlantic Ocean from September to October 2016.
attribute	NC_GLOBAL	title	String	Apparent Quantum Yields for the Photochemical Formation of Carbonyl Compounds in Seawater from the R/V Endeavor EN589 in the Northwest Atlantic Ocean from September to October 2016.
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-71.17943
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	Sample_Date		String
attribute	Sample_Date	bcodmo_name	String	date
attribute	Sample_Date	description	String	Date of sample (UTC) in format YYYY-MM-DD
attribute	Sample_Date	long_name	String	Sample Date
attribute	Sample_Date	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	Sample_Date	source_name	String	Sample_Date
attribute	Sample_Date	time_precision	String	1970-01-01
attribute	Sample_Date	units	String	unitless
variable	Station		String
attribute	Station	bcodmo_name	String	station
attribute	Station	description	String	Station identifier
attribute	Station	long_name	String	Station
attribute	Station	units	String	unitless
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	35.0118, 41.4013
attribute	latitude	axis	String	Y
attribute	latitude	bcodmo_name	String	latitude
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	description	String	Latitude - South is negative
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LATX/
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	NaN
attribute	longitude	actual_range	double	-71.17943, -64.7045
attribute	longitude	axis	String	X
attribute	longitude	bcodmo_name	String	longitude
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	description	String	Longitude - West is negative
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LONX/
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	Cast_ID_YYJSG		String
attribute	Cast_ID_YYJSG	bcodmo_name	String	cast
attribute	Cast_ID_YYJSG	description	String	CTD Cast ID with format: YY=Year=16 (2016); J=Julian Day; S=Station; G=GMT
attribute	Cast_ID_YYJSG	long_name	String	Cast ID YYJSG
attribute	Cast_ID_YYJSG	units	String	unitless
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	NaN
attribute	depth	actual_range	double	5.0, 5.8
attribute	depth	axis	String	Z
attribute	depth	bcodmo_name	String	depth
attribute	depth	colorBarMaximum	double	8000.0
attribute	depth	colorBarMinimum	double	-8000.0
attribute	depth	colorBarPalette	String	TopographyDepth
attribute	depth	description	String	Depth below surface
attribute	depth	ioos_category	String	Location
attribute	depth	long_name	String	Depth
attribute	depth	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/DEPH/
attribute	depth	positive	String	down
attribute	depth	standard_name	String	depth
attribute	depth	units	String	m
variable	Temperature		float
attribute	Temperature	_FillValue	float	NaN
attribute	Temperature	actual_range	float	273.15, 313.15
attribute	Temperature	bcodmo_name	String	unknown
attribute	Temperature	description	String	Temperature in Kelvin
attribute	Temperature	long_name	String	Temperature
attribute	Temperature	units	String	Kelvin (K)
variable	Wavelength		short
attribute	Wavelength	_FillValue	short	32767
attribute	Wavelength	actual_range	short	290, 400
attribute	Wavelength	bcodmo_name	String	wavelength
attribute	Wavelength	description	String	Wavelength
attribute	Wavelength	long_name	String	Wavelength
attribute	Wavelength	units	String	nanometer (nm)
variable	Acetaldehyde		float
attribute	Acetaldehyde	_FillValue	float	NaN
attribute	Acetaldehyde	actual_range	float	1.2E-6, 2.8E-4
attribute	Acetaldehyde	bcodmo_name	String	unknown
attribute	Acetaldehyde	description	String	Apparent quantum yields (AQY) for the photochemical production of acetaldehyde in seawater - Carbonyl Photoproduction Efficiency
attribute	Acetaldehyde	long_name	String	Acetaldehyde
attribute	Acetaldehyde	units	String	mole carbonyl photoproduced in seawater/mol photons absorbed by dissolved organic matter (mole/(mole quanta))
variable	Glyoxal		float
attribute	Glyoxal	_FillValue	float	NaN
attribute	Glyoxal	actual_range	float	4.5E-7, 3.3E-5
attribute	Glyoxal	bcodmo_name	String	unknown
attribute	Glyoxal	description	String	Apparent quantum yields (AQY) for the photochemical production of glyoxal in seawater - Carbonyl Photoproduction Efficiency
attribute	Glyoxal	long_name	String	Glyoxal
attribute	Glyoxal	units	String	mole carbonyl photoproduced in seawater/mol photons absorbed by dissolved organic matter (mole/(mole quanta))
variable	Methylglyoxal		float
attribute	Methylglyoxal	_FillValue	float	NaN
attribute	Methylglyoxal	actual_range	float	1.1E-7, 1.8E-5
attribute	Methylglyoxal	bcodmo_name	String	unknown
attribute	Methylglyoxal	description	String	Apparent quantum yields (AQY) for the photochemical production of methylglyoxal in seawater - Carbonyl Photoproduction Efficiency
attribute	Methylglyoxal	long_name	String	Methylglyoxal
attribute	Methylglyoxal	units	String	mole carbonyl photoproduced in seawater/mol photons absorbed by dissolved organic matter (mole/(mole quanta))
variable	AQY_SetUp		String
attribute	AQY_SetUp	bcodmo_name	String	exp_type
attribute	AQY_SetUp	description	String	Wavelength or temperature dependent set-up
attribute	AQY_SetUp	long_name	String	AQY Set Up
attribute	AQY_SetUp	units	String	unitless

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.