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     data   graph     files  public Chemical composition of 'model' Primary Marine Aerosol (mPMA) and seawater measured on R/V
Endeavor EN589 during Sept. - Oct. 2016
   ?     I   M   background (external link) RSS BCO-DMO bcodmo_dataset_750917

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 The ionic data reported in this file were generated by William Keene
([wck@virginia.edu](\\"mailto:wck@virginia.edu\\")) and John Maben and the
OCwe data were generated by David Kieber
([djkieber@esf.edu](\\"mailto:djkieber@esf.edu\\")). Please direct any related
questions accordingly.

Sampling and Analytical Methods: Samples were collected on RV/Endeavor cruise
589. Locations, times, and conditions at the four hydrographic stations are
available under Supplemental Documentation. During some periods, size-resolved
mPMA was sampled from the generator\u2019s headspace at 30 L min-1 with two
non-rotating Multi-Orifice Uniform Deposit Impactors (MOUDIs, [Marple et al.,
1991]) operated in parallel. Substrates and back filters from one impactor
were analyzed for major ions and those from the other impactor were analyzed
for water extractable organic carbon (OCwe). The aerodynamic cut diameters for
the impactor\u2019s size fractions were 18, 10, 5.6, 3.2, 1.8, 1.0, 0.56,
0.32, and 0.18 \u00b5m. Impactors were configured with precombusted 47-mm
diameter aluminum substrates and 37-mm diameter quartz backup filters.

During some periods, bulk mPMA was sampled in parallel at 30 L min-1 on two
precombusted 47-mm quartz filters, one of which was analyzed for major ions,
OCwe, and surfactants and the other for total OC and radiocarbon age.

During two periods, bulk mPMA was sampled in parallel at 30 L min-1 on two
90-mm Teflon filters. One sample was analyzed for major ions and OCwe and the
other was stored for photochemical manipulation experiments.

After recovery, samples of size-resolved and bulk mPMA for analysis of major
ions were transferred to precleaned 10-mL HDPE tubes, stored frozen,
subsequently extracted in 5 mL deionized water (DIW), and analyzed at the
University of Virginia (UVA) using a Dionex duel channel model ICS 3000 high-
performance ion chromatograph (IC). The anion channel was configured with
Thermo Scientific Dionex guard (IonPac AG 18: 4 x 50 mm) and analytical
separator (IonPac AS 18: 4 x 250mm) columns and electrolytically regenerated
suppressor (AERS 500: 4mm). The cation channel was configured Dionex Guard
(IonPac CG16: 5 x 50mm) and analytical separator (IonPac CG16: 5 x 250mm)
columns and a Thermo Scientific Dionex electrolytically regenerated suppressor
(CERS 500: 4mm).

Size-segregated mPMA sampled with cascade impactors and in bulk on quartz
filters for analysis of OCwe were transferred to precombusted 10-mL Pyrex
tubes, extracted immediately after recovery in 5 mL DIW, stored frozen, and
analyzed in triplicate with a Shimadzu Model TOC-V CSH carbon analyzer at the
State University of New York (SUNY).

Bulk mPMA sampled on Teflon filters were extracted immediately after recovery
in five sequential aliquots of DIW (total of 25 mL). Subsamples of extracts
were stored frozen on site and analyzed for major ions at UVA and for OCwe at
SUNY using methods described above.

Data for mPMA samples were corrected based on median concentrations of
analytes measured in dynamic handling blanks (N = 5 for impactor and 8 for
bulk samples) that were loaded and unloaded during the campaign and
subsequently processed and analyzed using procedures identical to those used
for samples.

Unfiltered seawater for analysis of major ions was sampled in precleaned 10-mL
HDPE tubes, stored frozen, and analyzed by IC at UVA.

Average detection limits (DLs) for mPMA analytes were estimated following
Keene et al. [1989, JGR] and are summarized (see Supplemental Documents)

Average precisions for inorganic mPMA analytes are estimated to be \u00b14% of
the measured concentrations or \u00b10.5*DLs, whichever are the greater
absolute values. Precisions for OCwe correspond to the standard deviations for
triplicate measurements.

Measured concentrations of all ionic constituents in seawater were
substantially higher than estimated DLs. Average precisions are approximately
\u00b12% of the measured concentrations.

Refer to the following papers for additional details regarding the design and
operation of the marine aerosol generator, analytical methods, and data
quality.
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 (external link)
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 Dr 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 (external link)
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 Dr 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 (external link)
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 Dr 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 (external link)
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 Dr 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 EN589 Aerosol and Seawater Composition
PI: W. Keene (UVA)
version: 2018-12-31
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/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.2d 13 Jun 2019
attribute NC_GLOBAL date_created String 2018-12-05T19:26:56Z
attribute NC_GLOBAL date_modified String 2019-03-18T13:45:54Z
attribute NC_GLOBAL defaultDataQuery String &time
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.750917.1
attribute NC_GLOBAL Easternmost_Easting double -64.78
attribute NC_GLOBAL geospatial_lat_max double 41.4
attribute NC_GLOBAL geospatial_lat_min double 35.04
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -64.78
attribute NC_GLOBAL geospatial_lon_min double -71.16
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/750917 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String TOC analyzer
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Used to measure total organic carbon concentration
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 750939
attribute NC_GLOBAL instruments_0_description String A unit that accurately determines the carbon concentrations of organic compounds typically by detecting and measuring its combustion product (CO2). See description document at: http://bcodata.whoi.edu/LaurentianGreatLakes_Chemistry/bs116.pdf
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB04/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Total Organic Carbon Analyzer
attribute NC_GLOBAL instruments_0_instrument_nid String 652
attribute NC_GLOBAL instruments_0_supplied_name String Shimadzu Model TOC-V CSH carbon analyzer
attribute NC_GLOBAL keywords String aerodynamic, bco, bco-dmo, biological, campaign, Campaign_Sequence_Number, chemical, CI_50_Aerodynamic_Cut_Diam, comments, cut, data, dataset, date, depth, diam, dmo, end, erddap, identifier, iso, ISO_DateTime_local_end, latitude, local, longitude, management, number, oceanography, ocwe, OCwe_STD, office, preliminary, profiler, S_Sample_Location, salinity, salinity-temperature-depth, sample, Sample_ID, Sample_Type, sequence, so4, start, statistics, std, temperature, time, type
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 metadata_source String https://www.bco-dmo.org/api/dataset/750917 (external link)
attribute NC_GLOBAL Northernmost_Northing double 41.4
attribute NC_GLOBAL param_mapping String {'750917': {'lat': 'master - latitude', 'lon': 'master - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/750917/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of Virginia
attribute NC_GLOBAL people_0_affiliation_acronym String UVA
attribute NC_GLOBAL people_0_person_name String William C. Keene
attribute NC_GLOBAL people_0_person_nid String 708330
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 Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_1_person_name String Nancy Copley
attribute NC_GLOBAL people_1_person_nid String 50396
attribute NC_GLOBAL people_1_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL project String Collaborative Research: Coupled Ocean-Atmosphere Recycling of Refractory Dissolved Organic Carbon in Seawater
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 Nancy Copley
attribute NC_GLOBAL publisher_role String BCO-DMO Data Manager(s)
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 35.04
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL summary String This dataset describes the ionic composition of western North Atlantic seawater and the corresponding chemical composition of mPMA produced from that seawater in a high-capacity generator over ranges of operating conditions. Measurements were taken during cruise EN589 on RV/Endeavor during September and October 2016.
attribute NC_GLOBAL title String Chemical composition of 'model' Primary Marine Aerosol (mPMA) and seawater measured on R/V Endeavor EN589 during Sept. - Oct. 2016
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -71.16
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.5-beta
variable Campaign_Sequence_Number   short  
attribute Campaign_Sequence_Number _FillValue short 32767
attribute Campaign_Sequence_Number actual_range short 26, 316
attribute Campaign_Sequence_Number colorBarMaximum double 100.0
attribute Campaign_Sequence_Number colorBarMinimum double 0.0
attribute Campaign_Sequence_Number description String Campaign sequence number corresponding to a given set of generator operating conditions as detailed in the companion file (EN589 Marine Aerosol Generator Operating Conditions).
attribute Campaign_Sequence_Number ioos_category String Statistics
attribute Campaign_Sequence_Number long_name String Campaign Sequence Number
attribute Campaign_Sequence_Number units String unitless
variable Sample_Type   String  
attribute Sample_Type description String Sample type: Size-resolved mPMA sampled with a cascade impactor (CI); bulk mPMA sampled on a quartz filter (B); bulk mPMA sampled on a Teflon filter for photochemical manipulation experiments (P); or seawater (S).
attribute Sample_Type ioos_category String Unknown
attribute Sample_Type long_name String Sample Type
attribute Sample_Type units String unitless
variable Sample_ID   byte  
attribute Sample_ID _FillValue byte 127
attribute Sample_ID actual_range byte 1, 33
attribute Sample_ID description String Sample ID number
attribute Sample_ID ioos_category String Identifier
attribute Sample_ID long_name String Sample ID
attribute Sample_ID units String unitless
variable CI_50_Aerodynamic_Cut_Diam   String  
attribute CI_50_Aerodynamic_Cut_Diam description String Aerodynamic cut diameter for CI samples (�m at ambient relative humidity).
attribute CI_50_Aerodynamic_Cut_Diam ioos_category String Unknown
attribute CI_50_Aerodynamic_Cut_Diam long_name String CI 50 Aerodynamic Cut Diam
attribute CI_50_Aerodynamic_Cut_Diam units String micrometers
variable S_Sample_Location   String  
attribute S_Sample_Location description String Location at which seawater was sampled (I denotes inlet to generator; O denotes outlet from generator). Duplicate measurements at the same time and location are denoted by 'Dup'.
attribute S_Sample_Location ioos_category String Location
attribute S_Sample_Location long_name String S Sample Location
attribute S_Sample_Location units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 35.04, 41.4
attribute latitude axis String Y
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String general latitude of sampling; north is positive [added by BCO-DMO from supplemental doc]
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
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 -71.16, -64.78
attribute longitude axis String X
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String general longitude of sampling; east is positive [added by BCO-DMO from supplemental doc]
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable ISO_DateTime_local_start   String  
attribute ISO_DateTime_local_start description String Size-resolved and bulk mPMA sample start date and time or seawater sampling date and time; ISO 8601:2004E format.
attribute ISO_DateTime_local_start ioos_category String Time
attribute ISO_DateTime_local_start long_name String ISO Date Time Local Start
attribute ISO_DateTime_local_start source_name String ISO_DateTime_local_start
attribute ISO_DateTime_local_start units String unitless
variable ISO_DateTime_local_end   String  
attribute ISO_DateTime_local_end description String Size-resolved and bulk mPMA sample stop date and time; ISO 8601:2004E format.
attribute ISO_DateTime_local_end ioos_category String Time
attribute ISO_DateTime_local_end long_name String ISO Date Time Local End
attribute ISO_DateTime_local_end units String unitless
variable Cl   float  
attribute Cl _FillValue float NaN
attribute Cl actual_range float 37.64, 593038.0
attribute Cl description String Cl- concentration: For mPMA in nmol m-3 air; for seawater in �M.
attribute Cl ioos_category String Unknown
attribute Cl long_name String CL
attribute Cl units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable Br   float  
attribute Br _FillValue float NaN
attribute Br actual_range float 0.05, 878.0
attribute Br description String Br- concentration: For mPMA in nmol m-3 air; for seawater in �M.
attribute Br ioos_category String Unknown
attribute Br long_name String BR
attribute Br units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable SO4   float  
attribute SO4 _FillValue float NaN
attribute SO4 actual_range float 1.78, 30768.0
attribute SO4 description String SO42- concentration: For mPMA in nmol m-3 air; for seawater in �M.
attribute SO4 ioos_category String Unknown
attribute SO4 long_name String SO4
attribute SO4 units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable Na   float  
attribute Na _FillValue float NaN
attribute Na actual_range float 32.12, 508094.0
attribute Na description String Na+ concentration: For mPMA in nmol m-3 air; for seawater in �M.
attribute Na ioos_category String Unknown
attribute Na units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable K   float  
attribute K _FillValue float NaN
attribute K actual_range float 0.0, 10305.0
attribute K description String K+ concentration: For mPMA in nmol m-3 air; for seawater in �M.
attribute K ioos_category String Unknown
attribute K long_name String K
attribute K units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable Mg   float  
attribute Mg _FillValue float NaN
attribute Mg actual_range float 2.88, 54581.0
attribute Mg description String Mg2+ concentration: For mPMA in nmol m-3 air; for seawater in �M.
attribute Mg ioos_category String Unknown
attribute Mg long_name String MG
attribute Mg units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable Ca   float  
attribute Ca _FillValue float NaN
attribute Ca actual_range float 0.07, 11080.0
attribute Ca description String Ca2+ concentration: For mPMA in nmol m-3 air; for seawater in �M.
attribute Ca ioos_category String Unknown
attribute Ca long_name String Ca
attribute Ca units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable OCwe   float  
attribute OCwe _FillValue float NaN
attribute OCwe actual_range float 1.51, 66.59
attribute OCwe description String Water-extractable organic carbon (OCwe) concentration for mPMA in nmol C m-3 air.
attribute OCwe ioos_category String Unknown
attribute OCwe long_name String OCwe
attribute OCwe units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable OCwe_STD   float  
attribute OCwe_STD _FillValue float NaN
attribute OCwe_STD actual_range float 0.01, 2.88
attribute OCwe_STD description String OCwe precision for mPMA in nmol C m-3 air
attribute OCwe_STD ioos_category String Unknown
attribute OCwe_STD long_name String OCwe STD
attribute OCwe_STD units String nanomol/cubic meter (nmol m-3) for mPMA; micromol (�M) for S
variable Comments   String  
attribute Comments description String Comments
attribute Comments ioos_category String Unknown
attribute Comments long_name String Comments
attribute Comments units String unitless

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


 
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