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     data   graph     files  public Concentrations of dissolved organic carbon and phenols from Polarstern cruise PS 94-ARK-XXIX/
3 from August to October 2015
   ?     I   M   background (external link) RSS BCO-DMO bcodmo_dataset_767285

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 Samples were filtered straight from Niskin bottles following established
protocols for trace-metal clean sampling (Sample handling protocols for
GEOTRACES cruises).

Samples for DOC concentration were acidified to pH 2.5 and analyzed by high-
temperature combustion on a Shimadzu TOC-L. DOC was calculated as the mean of
between three and five injections using a six-point standard curve.

Lignin-derived phenols were determined following Yan and Kaiser (2018; Anal.
Chem), and Yan and Kaiser (2018; Analytica Chimica Acta). Briefly, C18
extracts were redissolved in 200 \u03bcL of 1.1 mol L\u22121 argon- sparged
(10 min) NaOH in a 400 uL Teflon vial (Savillex Corp) and amended with
containing 500 mg CuO, and amended with 10\u03bcL of10 mmolL\u22121 CuSO4 and
10\u03bc L of 0.2 molL\u22121 ascorbic acid. Oxidation was at 150 C for 120
minutes. Following oxidation, the samples were spiked with with a surrogate
standard mixture of p- hydroxybenzoic acid-13C7, vanillin-13C6, and
syringaldehyde-13C6 and acidified to pH \u2248 2.5 with 6 mol L\u22121
sulfuric acid in the reaction vials.\u00a0 Clean-up of samples was performed
with Waters HLB cartrides and final sample eluates were dried under ultra-high
purity argon. Phenols were quantified by liquid chromatography/electrospray
ionization-tandem mass spectrometry using a five-point calibration curve
bracketing the concentration range. Quantified phenols (TDLP included
vanillin, acetovanillone, vanillic acid, syringaldehyde, acetosyringone,
syringic acid, coumaric acid, ferulic acid, p-hydroxy-benzaldehyde, p-hydroxy-
acetophenone, and p-hydroxy-benzoic acid.

Samples were filtered straight from Niskin bottles following established
protocols for trace-metal clean sampling (Sample handling protocols for
GEOTRACES cruises)

Samples for DOC concentration were acidified to pH 2.5 and analyzed by high-
temperature combustion on a Shimadzu TOC-L. DOC was calculated as the mean of
between three and five injections using a six-point standard curve.

Lignin-derived phenols were determined following Yan and Kaiser (2018; Anal.
Chem), and Yan and Kaiser (2018; Analytica Chimica Acta). Briefly, C18
extracts were redissolved in 200 \u03bcL of 1.1 mol L\u22121 argon- sparged
(10 min) NaOH in a 400 uL Teflon vial (Savillex Corp) and amended with
containing 500 mg CuO, and amended with 10\u03bcL of10 mmolL\u22121 CuSO4 and
10\u03bc L of 0.2 molL\u22121 ascorbic acid. Oxidation was at 150 C for 120
minutes. Following oxidation, the samples were spiked with with a surrogate
standard mixture of p- hydroxybenzoic acid-13C7, vanillin-13C6, and
syringaldehyde-13C6 and acidified to pH \u2248 2.5 with 6 mol L\u22121
sulfuric acid in the reaction vials.\u00a0 Clean-up of samples was performed
with Waters HLB cartrides and final sample eluates were dried under ultra-high
purity argon. Phenols were quantified by liquid chromatography/electrospray
ionization-tandem mass spectrometry using a five-point calibration curve
bracketing the concentration range. Quantified phenols: TDLP included
vanillin, acetovanillone, vanillic acid, syringaldehyde, acetosyringone,
syringic acid, coumaric acid, ferulic acid, p-hydroxy-benzaldehyde, p-hydroxy-
acetophenone, and p-hydroxy-benzoic acid.
attribute NC_GLOBAL awards_0_award_nid String 763578
attribute NC_GLOBAL awards_0_award_number String OCE-1536506
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1536506 (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 cdm_data_type String Other
attribute NC_GLOBAL comment String Dissolved phenols for Polarstern cruise PS94 ARK-XXIX/3
PI: Karl Kaiser (TAMU)
Version date: 10-May-2019
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 2019-05-10T17:14:03Z
attribute NC_GLOBAL date_modified String 2019-06-04T19:19:57Z
attribute NC_GLOBAL defaultDataQuery String &time
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.767285.1
attribute NC_GLOBAL Easternmost_Easting double 179.8463
attribute NC_GLOBAL geospatial_lat_max double 89.1667
attribute NC_GLOBAL geospatial_lat_min double 73.2525
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 179.8463
attribute NC_GLOBAL geospatial_lon_min double -179.9473
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 4000.9
attribute NC_GLOBAL geospatial_vertical_min double 7.3
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/767285 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Niskin bottle
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 767339
attribute NC_GLOBAL instruments_0_description String A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24 or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Niskin bottle
attribute NC_GLOBAL instruments_0_instrument_nid String 413
attribute NC_GLOBAL instruments_0_supplied_name String Niskin bottles
attribute NC_GLOBAL instruments_1_acronym String Mass Spec
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 767346
attribute NC_GLOBAL instruments_1_description String General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components.
attribute NC_GLOBAL instruments_1_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB16/ (external link)
attribute NC_GLOBAL instruments_1_instrument_name String Mass Spectrometer
attribute NC_GLOBAL instruments_1_instrument_nid String 685
attribute NC_GLOBAL instruments_1_supplied_name String liquid chromatography/electrospray ionization-tandem mass spectrometry
attribute NC_GLOBAL instruments_2_acronym String Shimadzu TOC-L
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 767340
attribute NC_GLOBAL instruments_2_description String A Shimadzu TOC-L Analyzer measures DOC by high temperature combustion method.

Developed by Shimadzu, the 680 degree�C combustion catalytic oxidation method is now used worldwide. One of its most important features is the capacity to efficiently oxidize hard-to-decompose organic compounds, including insoluble and macromolecular organic compounds. The 680 degree�C combustion catalytic oxidation method has been adopted for the TOC-L series.

http://www.shimadzu.com/an/toc/lab/toc-l2.html
attribute NC_GLOBAL instruments_2_instrument_external_identifier String http://onto.nerc.ac.uk/CAST/124.html (external link)
attribute NC_GLOBAL instruments_2_instrument_name String Shimadzu TOC-L Analyzer
attribute NC_GLOBAL instruments_2_instrument_nid String 527277
attribute NC_GLOBAL instruments_2_supplied_name String Shimadzu TOC-L
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, bottle, cast, chemical, commerce, data, dataset, date, density, department, depth, Depth_water, dmo, doc, earth, Earth Science > Oceans > Salinity/Density > Salinity, erddap, identifier, latitude, longitude, management, ocean, oceanography, oceans, office, phenols, practical, preliminary, salinity, science, sea, sea_water_practical_salinity, seawater, station, Temp, temperature, time, water
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 metadata_source String https://www.bco-dmo.org/api/dataset/767285 (external link)
attribute NC_GLOBAL Northernmost_Northing double 89.1667
attribute NC_GLOBAL param_mapping String {'767285': {'Depth_water': 'flag - depth', 'Latitude': 'flag - latitude', 'Longitude': 'flag - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/767285/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Texas A&M, Galveston
attribute NC_GLOBAL people_0_affiliation_acronym String TAMUG
attribute NC_GLOBAL people_0_person_name String Karl Kaiser
attribute NC_GLOBAL people_0_person_nid String 732803
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 Shannon Rauch
attribute NC_GLOBAL people_1_person_nid String 51498
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 Development and application of a high sensitivity, ultra low volume method to measure biomarkers of terrigenous organic matter in the open ocean
attribute NC_GLOBAL projects_0_acronym String Lignin phenol method development
attribute NC_GLOBAL projects_0_description String NSF Award Abstract:
The distribution and fate of land-derived, or terrigenous, organic matter in the ocean has long been of interest to oceanographers, but that interest has grown considerably as research on the marine and global carbon cycle intensifies. Lignin is a major structural polymer found only in vascular plants, making lignin a unique tracer of terrigenous organic matter input to the marine environment. The current analytical tool for analyzing lignin, breaking it into a suite of identifiable phenolic compounds, is complex, time consuming and requires 10 to 30 liters of water. Given these limitations, applications of lignin phenols as tracers of terrestrial organic carbon in the ocean have been sparse. Through this project, the researchers aim to redesign existing chemical methodology together with modified instrumental detection for even 3 times greater sensitivity using a sample of less than 200 milliliters. Outfitting the scientific community with new methodology to sensitively trace this marker of terrigenous organic carbon will provide a clearer understanding of organic matter fluxes between and within terrestrial and oceanic reservoirs, and potentially establish lignin phenols as a robust oceanographic tracer. This project will support the development of the next generation of scientists, including an early career investigator, and graduate and undergraduate students.
Lignin phenol measurements have been used to study general distribution patterns and mechanisms of decomposition of terrigenous dissolved organic carbon (tDOC) in the global ocean. The distribution pattern of tDOC among ocean basins is generally consistent with the global pattern of riverine discharge to the ocean basins. However, large scale generalizations required and more fully resolved distributions of lignin as a tracer of tDOC are hampered by the difficulties and limitations associated with the present lignin phenol method. The main objectives of this project are to (1) develop methodology for measuring dissolved lignin in ultra-low volumes at high sensitivity in open ocean seawater and (2) apply the new method to study terrigenous tDOC processing and transport in the Eurasian Basin of the Arctic Ocean, where large Siberian rivers deliver the bulk of tDOC to the shelf areas. Results from this research will help evaluate lignin phenols as robust oceanographic tracers, useful to study physical mixing in the Arctic Ocean and potentially improve our understanding of the fate and removal of terrigenous organic carbon in the oceans. Addressing the second objective would provide well-constrained decay constants for lignin and tDOC in the Arctic Ocean and provide novel information on halocline formation. Integration of tDOC budgets, freshwater budgets, and circulation and atmospheric patterns will ultimately improve understanding of biogeochemical cycles in the Arctic Ocean and its role in global climate.
attribute NC_GLOBAL projects_0_end_date String 2018-12
attribute NC_GLOBAL projects_0_geolocation String Arctic Ocean
attribute NC_GLOBAL projects_0_name String Development and application of a high sensitivity, ultra low volume method to measure biomarkers of terrigenous organic matter in the open ocean
attribute NC_GLOBAL projects_0_project_nid String 763579
attribute NC_GLOBAL projects_0_start_date String 2016-01
attribute NC_GLOBAL publisher_name String Shannon Rauch
attribute NC_GLOBAL publisher_role String BCO-DMO Data Manager(s)
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 73.2525
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL summary String Concentrations of dissolved organic carbon and phenols from Polarstern cruise PS 94-ARK-XXIX/3 from August to October 2015.
attribute NC_GLOBAL title String Concentrations of dissolved organic carbon and phenols from Polarstern cruise PS 94-ARK-XXIX/3 from August to October 2015
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -179.9473
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.5-beta
variable Station   short  
attribute Station _FillValue short 32767
attribute Station actual_range short 4, 157
attribute Station description String Station
attribute Station ioos_category String Identifier
attribute Station long_name String Station
attribute Station units String unitless
variable Cast   byte  
attribute Cast _FillValue byte 127
attribute Cast actual_range byte 1, 9
attribute Cast description String Cast
attribute Cast ioos_category String Unknown
attribute Cast long_name String Cast
attribute Cast units String unitless
variable Bottle   byte  
attribute Bottle _FillValue byte 127
attribute Bottle actual_range byte 1, 24
attribute Bottle description String Bottle
attribute Bottle ioos_category String Unknown
attribute Bottle long_name String Bottle
attribute Bottle units String unitless
variable Date_Time_UTC   String  
attribute Date_Time_UTC description String Date and time (UTC); format: yyyy-mm-ddTHH:MM
attribute Date_Time_UTC ioos_category String Time
attribute Date_Time_UTC long_name String Date Time UTC
attribute Date_Time_UTC source_name String Date_Time_UTC
attribute Date_Time_UTC units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 73.2525, 89.1667
attribute latitude axis String Y
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String Latitude north
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 -179.9473, 179.8463
attribute longitude axis String X
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String Longitude east (postive values = east)
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 depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 7.3, 4000.9
attribute depth axis String Z
attribute depth colorBarMaximum double 8000.0
attribute depth colorBarMinimum double -8000.0
attribute depth colorBarPalette String TopographyDepth
attribute depth description String Sample depth
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable Temp   float  
attribute Temp _FillValue float NaN
attribute Temp actual_range float -1.7956, 7.2796
attribute Temp description String Temperature
attribute Temp ioos_category String Temperature
attribute Temp long_name String Temperature
attribute Temp units String degrees Celsius
variable Salinity   float  
attribute Salinity _FillValue float NaN
attribute Salinity actual_range float 27.2066, 35.158
attribute Salinity colorBarMaximum double 37.0
attribute Salinity colorBarMinimum double 32.0
attribute Salinity description String Salinity
attribute Salinity ioos_category String Salinity
attribute Salinity long_name String Sea Water Practical Salinity
attribute Salinity units String PSU
variable DOC   float  
attribute DOC _FillValue float NaN
attribute DOC actual_range float 40.6, 146.4
attribute DOC description String DOC
attribute DOC ioos_category String Unknown
attribute DOC long_name String DOC
attribute DOC units String micromoles per liter (umol/L)
variable Phenols   float  
attribute Phenols _FillValue float NaN
attribute Phenols actual_range float 0.0, 19823.5
attribute Phenols description String Phenols
attribute Phenols ioos_category String Unknown
attribute Phenols long_name String Phenols
attribute Phenols units String picomoles per liter (pmol/L)

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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