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   set  data   graph     files  public Dissolved iron speciation from 2013 U.S. GEOTRACES Eastern Pacific Zonal Transect from R/V
Thomas G. Thompson TN303 from October-December 2013 (U.S. GEOTRACES EPZT project, EPZT Fe Cu
Co project)
   ?     I   M   background (external link) RSS BCO-DMO bcodmo_dataset_668556

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,.odvTxt
attribute NC_GLOBAL acquisition_description String Sample collection and filtering: Water column samples were collected by the
U.S. GEOTRACES sampling team from 24 modified 12-L Teflon-coated GO-FLO
samplers (General Oceanics) deployed on the GEOTRACES clean CTD rosette system
(Cutter and Bruland 2012). The U.S. GEOTRACES sampling team filtered the
samples through 0.2 \u00b5m Supor Acropak filter cartridges (Pall) inside the
U.S. GEOTRACES clean-air laboratory van. Near-surface samples (~2 m depth)
were collected underway either on approach or leaving each station using the
Ken Bruland lab towfish, \u201cGeoFish\u201d, deployed to collect surface
samples from outside the wake of the ship. Seawater from the GeoFish was
pumped directly into the Bruland lab clean air laboratory van and filtered
through 0.2 \u00b5m Supor Acropak filter cartridges.

Filtered seawater samples for iron speciation (organic complexation) were
collected in 500 mL acid-cleaned Nalgene narrow-mouth fluorinated high-density
polyethylene (FPE) bottles that had been filled with Milli-Q for at least two
weeks after acid cleaning and rinsed three times with filtered seawater prior
to sample collection (Buck et al. 2012). All filtered seawater samples for
dissolved iron speciation were frozen at -20 \u00baC shipboard by the sampling
team and shipped to the University of South Florida for laboratory-based
analyses post cruise.

Dissolved iron speciation (organic complexation) analyses: Dissolved iron
speciation (organic complexation) was analyzed using competitive ligand
exchange- adsorptive cathodic stripping voltammetry (CLE-AdCSV) with
salicylaldoxime as the added competing ligand (Buck et al. 2015), modified
from the original Rue and Bruland (1995) method. A borate-ammonium buffer was
added to all vials, for a final pH of 8.2 (NBS scale; Buck et al. 2007, 2012).
Dissolved iron additions of 0 to 10 nM were used in the titrations, for a
total of at least 15 points in each titration. These dissolved iron additions
were chosen to match those of the U.S. GEOTRACES North Atlantic dataset and
include additional datapoints within this range to allow higher resolution
data within titrations (Buck et al. 2016). Deposition times of 90 to 600 s
were applied to the analyses, with typically longer deposition times for
deeper water column samples. CLE-AdCSV analyses were performed on
Bioanalytical Systems (BASi) Controlled Growth Mercury Electrodes (static
mercury drop setting, size 14) with Epsilon e2 (BASi) electrochemical
analyzers. There are no reference samples available for iron speciation
measurements of iron in seawater, though this method has been shown to compare
well with other labs and techniques in GEOTRACES intercalibration exercises
(Buck et al. 2012, 2016).

FLAG:\u00a0The standard Ocean Data View qualifying flags were used (reference
all flags
at\u00a0[https://www.bodc.ac.uk/data/codes_and_formats/odv_format/](\\"https://www.bodc.ac.uk/data/codes_and_formats/odv_format/\\")):

1: Good Value: Good quality data value that is not part of any identified
malfunction and has been verified as consistent with real phenomena during the
quality control process. [Used when data were shown to be reproducible]

2: Probably Good Value: Data value that is probably consistent with real
phenomena but this is unconfirmed or data value forming part of a malfunction
that is considered too small to affect the overall quality of the data object
of which it is a part. [Used when the reported value reflects analysis of a
single or unverified replicate]

3: Probably Bad Value: Data value recognized as unusual during quality control
that forms part of a feature that is probably inconsistent with real
phenomena. [Not used]

4: Bad Value: An obviously erroneous data value. [Not used]

5: Changed Value: Data value adjusted during quality control. [Not used]

6: Value Below Detection Limit: The level of the measured phenomenon was too
small to be quantified by the technique employed to measure it. The
accompanying value is the detection limit for the technique or zero if that
value is unknown. [We report \u201cnot_detected\u201d rather than zero or a
detection limit value for this case]

7: Value in Excess: The level of the measured phenomenon was too large to be
quantified by the technique employed to measure it. The accompanying value is
the measurement limit for the technique. [Not used]

8: Interpolated Value: This value has been derived by interpolation from other
values in the data object. [Not used]

9: Missing Value: The data value is missing. Any accompanying value will be a
magic number representing absent data. [Not used]
attribute NC_GLOBAL awards_0_award_nid String 648147
attribute NC_GLOBAL awards_0_award_number String OCE-1441969
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1441969 (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 Iron Speciation Profiles (organic complexation)
from GEOTRACES-EPZT cruise TN303 [PRELIMINARY DATA]

PI: K. Buck (USF)

version: 2016-12-07
NOTE: Bottle and Fish samples reported in separate columns (Fish are to far right)
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 2016-12-05T20:51:19Z
attribute NC_GLOBAL date_modified String 2017-10-31T18:05:49Z
attribute NC_GLOBAL defaultDataQuery String &time
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.718433
attribute NC_GLOBAL Easternmost_Easting double -77.3761
attribute NC_GLOBAL geospatial_lat_max double -10.5003
attribute NC_GLOBAL geospatial_lat_min double -16.0006
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -77.3761
attribute NC_GLOBAL geospatial_lon_min double -152.079
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 5500.0
attribute NC_GLOBAL geospatial_vertical_min double 2.0
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/668556 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String CTD Sea-Bird
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 668563
attribute NC_GLOBAL instruments_0_description String Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics, no specific unit identified. This instrument designation is used when specific make and model are not known. See also other SeaBird instruments listed under CTD. More information from Sea-Bird Electronics.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/130/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String CTD Sea-Bird
attribute NC_GLOBAL instruments_0_instrument_nid String 447
attribute NC_GLOBAL instruments_1_acronym String GO-FLO Teflon TM
attribute NC_GLOBAL instruments_1_dataset_instrument_description String Used for water sample collections
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 668565
attribute NC_GLOBAL instruments_1_description String GO-FLO Teflon-lined Trace Metal free sampling bottles are used for collecting water samples for trace metal, nutrient and pigment analysis. The GO-FLO sampling bottle is designed specifically to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.
attribute NC_GLOBAL instruments_1_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/30/ (external link)
attribute NC_GLOBAL instruments_1_instrument_name String GO-FLO Teflon Trace Metal Bottle
attribute NC_GLOBAL instruments_1_instrument_nid String 533
attribute NC_GLOBAL instruments_1_supplied_name String 24 modified 12-L Teflon-coated GO-FLO samplers (General Oceanics)
attribute NC_GLOBAL instruments_2_acronym String GeoFish
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 668564
attribute NC_GLOBAL instruments_2_description String The GeoFish towed sampler is a custom designed near surface (
attribute NC_GLOBAL instruments_2_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/31/ (external link)
attribute NC_GLOBAL instruments_2_instrument_name String GeoFish Towed near-Surface Sampler
attribute NC_GLOBAL instruments_2_instrument_nid String 549
attribute NC_GLOBAL instruments_3_acronym String BASi EC-epsilon 2
attribute NC_GLOBAL instruments_3_dataset_instrument_description String For CLE-AdCSV analyses�
attribute NC_GLOBAL instruments_3_dataset_instrument_nid String 668562
attribute NC_GLOBAL instruments_3_description String The Bioanalytical Systems EC epsilon is a family of potentiostat/galvanostats for electrochemistry. The most basic epsilon instrument can be used for standard techniques, as well as chronopotentiometry for materials characterization (e.g., characterization of transition metal complexes by cyclic voltammetry and controlled potential electrolysis, or of biosensors by cyclic voltammetry and constant potential amperometry). Pulse, square wave, and stripping techniques can be added by a software upgrade, and a second channel can be added by a hardware upgrade.
http://www.basinc.com/products/ec/epsilon/
attribute NC_GLOBAL instruments_3_instrument_name String BASi EC-epsilon 2 Autoanalyzer
attribute NC_GLOBAL instruments_3_instrument_nid String 689
attribute NC_GLOBAL instruments_3_supplied_name String BASi EC-epsilon 2 Autoanalyzer
attribute NC_GLOBAL instruments_4_acronym String BASI CGME
attribute NC_GLOBAL instruments_4_dataset_instrument_description String For CLE-AdCSV analyses�
attribute NC_GLOBAL instruments_4_dataset_instrument_nid String 668561
attribute NC_GLOBAL instruments_4_description String Bioanalytical Systems (BASi) Mercury drop electrodes are generated by the BASi Controlled Growth Mercury Electrode (CGME) in three modes:

DME (Dropping Mercury Electrode) - mercury is allowed to flow freely from the reservoir down the capillary and so the growth of the mercury drop and its lifetime is controlled by gravity. (The optional 100 um capillary is recommended for this mode.)

SMDE (Static Mercury Drop Electrode) - the drop size is determined by the length of time for which the fast-response capillary valve is opened, and the drop is dislodged by a drop knocker. The dispense/knock timing is microprocessor-controlled and is typically coordinated with the potential pulse or square-wave waveform. This mode can also used to generate the Hanging Mercury Drop Electrode required for stripping experiments.

CGME (Controlled Growth Mercury Electrode) - the mercury drop is grown by a series of pulses that open the capillary valve. The number of pulses, their duration, and their frequency can be varied by PC control, providing great flexibility in both the drop size and its rate of growth. This CGME mode can be used for both polarographic and stripping experiments.

http://www.basinc.com/products/ec/cgme.php
attribute NC_GLOBAL instruments_4_instrument_name String BASi Controlled Growth Mercury Electrode
attribute NC_GLOBAL instruments_4_instrument_nid String 690
attribute NC_GLOBAL instruments_4_supplied_name String BASi Controlled Growth Mercury Electrode
attribute NC_GLOBAL keywords String 95pcnt, bco, bco-dmo, biological, bottle, chemical, conc, cruise, cruise_id, data, dataset, datetime, depth, dmo, erddap, event, eventno, Fe_D_CONC_BOTTLE, Fe_D_CONC_FISH, fish, flag, geotrc, GEOTRC_EVENTNO, GEOTRC_INSTR, GEOTRC_SAMPNO, identifier, instr, iso, L1_95pcnt_CI, L1_95pcnt_CI_FISH, L1_FLAG, L1_FLAG_FISH, L1Fe_D_CONC_BOTTLE, L1Fe_D_CONC_FISH, L1Fe_D_LogK_BOTTLE, L1Fe_D_LogK_FISH, L2, L2_95pcnt_CI, L2_95pcnt_CI_FISH, L2_FLAG, L2_FLAG_FISH, L2Fe_D_CONC_BOTTLE, L2Fe_D_CONC_FISH, L2Fe_D_LogK_BOTTLE, L2Fe_D_LogK_FISH, L3, L3_95pcnt_CI, L3_95pcnt_CI_FISH, L3_FLAG, L3_FLAG_FISH, L3Fe_D_CONC_BOTTLE, L3Fe_D_CONC_FISH, L3Fe_D_LogK_BOTTLE, L3Fe_D_LogK_FISH, latitude, log, log_K1_95pcnt_CI, log_K1_95pcnt_CI_FISH, log_K1_FLAG, log_K1_FLAG_FISH, log_K2_95pcnt_CI, log_K2_95pcnt_CI_FISH, log_K2_FLAG, log_K2_FLAG_FISH, log_K3_95pcnt_CI, log_K3_95pcnt_CI_FISH, log_K3_FLAG, log_K3_FLAG_FISH, longitude, management, oceanography, office, preliminary, quality, sampno, start, station, time
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/668556 (external link)
attribute NC_GLOBAL Northernmost_Northing double -10.5003
attribute NC_GLOBAL param_mapping String {'668556': {'lat': 'master - latitude', 'depth': 'flag - depth', 'lon': 'master - longitude', 'ISO_DATETIME_UTC_START_EVENT': 'master - time'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/668556/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of South Florida
attribute NC_GLOBAL people_0_affiliation_acronym String USF
attribute NC_GLOBAL people_0_person_name String Kristen N. Buck
attribute NC_GLOBAL people_0_person_nid String 51624
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 U.S. GEOTRACES East Pacific Zonal Transect, US GEOTRACES Pacific Section: Measurement of the organic complexation of dissolved iron, copper and cobalt, and total dissolved cobalt
attribute NC_GLOBAL projects_0_acronym String U.S. GEOTRACES EPZT
attribute NC_GLOBAL projects_0_description String From the NSF Award Abstract
The mission of the International GEOTRACES Program (www.geotraces.org), of which the U.S. chemical oceanography research community is a founding member, is "to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions" (GEOTRACES Science Plan, 2006). In the United States, ocean chemists are currently in the process of organizing a zonal transect in the eastern tropical South Pacific (ETSP) from Peru to Tahiti as the second cruise of the U.S.GEOTRACES Program. This Pacific section includes a large area characterized by high rates of primary production and particle export in the eastern boundary associated with the Peru Upwelling, a large oxygen minimum zone that is a major global sink for fixed nitrogen, and a large hydrothermal plume arising from the East Pacific Rise. This particular section was selected as a result of open planning workshops in 2007 and 2008, with a final recommendation made by the U.S.GEOTRACES Steering Committee in 2009. It is the first part of a two-stage plan that will include a meridional section of the Pacific from Tahiti to Alaska as a subsequent expedition.
This award provides funding for management of the U.S.GEOTRACES Pacific campaign to a team of scientists from the University of Southern California, Old Dominion University, and the Woods Hole Oceanographic Institution. The three co-leaders will provide mission leadership, essential support services, and management structure for acquiring the trace elements and isotopes samples listed as core parameters in the International GEOTRACES Science Plan, plus hydrographic and nutrient data needed by participating investigators. With this support from NSF, the management team will (1) plan and coordinate the 52-day Pacific research cruise described above; (2) obtain representative samples for a wide variety of trace metals of interest using conventional CTD/rosette and GEOTRACES Sampling Systems; (3) acquire conventional JGOFS/WOCE-quality hydrographic data (CTD, transmissometer, fluorometer, oxygen sensor, etc) along with discrete samples for salinity, dissolved oxygen (to 1 uM detection limits), plant pigments, redox tracers such as ammonium and nitrite, and dissolved nutrients at micro- and nanomolar levels; (4) ensure that proper QA/QC protocols are followed and reported, as well as fulfilling all GEOTRACES Intercalibration protocols; (5) prepare and deliver all hydrographic-type data to the GEOTRACES Data Center (and US data centers); and (6) coordinate cruise communications between all participating investigators, including preparation of a hydrographic report/publication.
Broader Impacts: The project is part of an international collaborative program that has forged strong partnerships in the intercalibration and implementation phases that are unprecedented in chemical oceanography. The science product of these collective missions will enhance our ability to understand how to interpret the chemical composition of the ocean, and interpret how climate change will affect ocean chemistry. Partnerships include contributions to the infrastructure of developing nations with overlapping interests in the study area, in this case Peru. There is a strong educational component to the program, with many Ph.D. students carrying out thesis research within the program.
Figure 1. The 2013 GEOTRACES EPZT Cruise Track. [click on the image to view a larger version]
attribute NC_GLOBAL projects_0_end_date String 2015-06
attribute NC_GLOBAL projects_0_geolocation String Eastern Tropical Pacific - Transect from Peru to Tahiti
attribute NC_GLOBAL projects_0_name String U.S. GEOTRACES East Pacific Zonal Transect
attribute NC_GLOBAL projects_0_project_nid String 499723
attribute NC_GLOBAL projects_0_project_website String http://www.geotraces.org/ (external link)
attribute NC_GLOBAL projects_0_start_date String 2012-06
attribute NC_GLOBAL projects_1_acronym String EPZT Fe Cu Co
attribute NC_GLOBAL projects_1_description String Description from NSF award abstract:
Dissolved iron (Fe), copper (Cu), and cobalt (Co) are essential elements for phytoplankton growth which in turn influences the marine carbon cycle; however, despite this important role, the cycling, distribution, and bioavailability of these bioactive elements remains poorly understood. For example, strong organic ligands influence bioavailability and solubility, but it is unclear how interactions change throughout the water column under variable conditions. Recognizing a need for this data, researchers from the Bermuda Institute of Ocean Sciences, Woods Hole Oceanographic Institution, and Scripps Institute of Oceanography will measure the organic complexation of dissolved Fe, Cu, and Co as well as total dissolved Co concentrations during the 2013 GEOTRACES cruise which will transect the coastal upwelling zone off Peru, an intense oxygen minimum zone, the East Pacific Rise hydrothermal plume, and the oligotrophic waters near Tahiti. This study will result in a significant dataset on the speciation of these bioactive elements throughout the water column which will help assess the relationships between dissolved Fe, Cu, and Co distributions and ligand concentration gradients and will likely reveal large chemical gradients over this dynamic oceanographic region. As regards dissolved Co concentrations, these measurements should provide new insights on the marine biogeochemistry of the element, especially in relation to oxygen minimum zones and hydrothermal plumes.
attribute NC_GLOBAL projects_1_end_date String 2016-02
attribute NC_GLOBAL projects_1_geolocation String East Pacific
attribute NC_GLOBAL projects_1_name String US GEOTRACES Pacific Section: Measurement of the organic complexation of dissolved iron, copper and cobalt, and total dissolved cobalt
attribute NC_GLOBAL projects_1_project_nid String 648113
attribute NC_GLOBAL projects_1_start_date String 2013-03
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 -16.0006
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL subsetVariables String cruise_id
attribute NC_GLOBAL summary String Dissolved iron-binding organic ligand concentrations and conditional stability
constants from surface GeoFish and GO-FLO water column samples collected in
2013 during the U.S. GEOTRACES GP16 cruise in the Eastern Pacific between Peru
and Tahiti on the R.V. Thomas G. Thompson, \u00a0cruise TN303.

The FISH and BOTTLE data have been split into separate columns as per
GEOTRACES Parameter Naming Conventions.The FISH data are to the far right.

* To access the data with the FISH and BOTTLE data merged, see:\u00a0[http://data.bco-dmo.org/jg/serv/BCO/GEOTRACES/EPZT/Fe_spec_EPZT_joined.html0%7Bdir=data.bco-dmo.org/jg/dir/BCO/GEOTRACES/EPZT/,info=data.bco-dmo.org/jg/info/BCO/GEOTRACES/EPZT/Fe_speciation%7D](\\http://data.bco-dmo.org/jg/serv/BCO/GEOTRACES/EPZT/Fe_spec_EPZT_joined.html0%7Bdir=data.bco-dmo.org/jg/dir/BCO/GEOTRACES/EPZT/,info=data.bco-dmo.org/jg/info/BCO/GEOTRACES/EPZT/Fe_speciation%7D\\)
attribute NC_GLOBAL time_coverage_end String 2013-12-17T07:14:00Z
attribute NC_GLOBAL time_coverage_start String 2013-10-28T18:52:00Z
attribute NC_GLOBAL title String Dissolved iron speciation from 2013 U.S. GEOTRACES Eastern Pacific Zonal Transect from R/V Thomas G. Thompson TN303 from October-December 2013 (U.S. GEOTRACES EPZT project, EPZT Fe Cu Co project)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -152.079
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.5-beta
variable cruise_id   String  
attribute cruise_id description String cruise identification
attribute cruise_id ioos_category String Identifier
attribute cruise_id long_name String Cruise Id
attribute cruise_id units String unitless
variable station   byte  
attribute station _FillValue byte 127
attribute station actual_range byte 1, 36
attribute station description String station number
attribute station ioos_category String Identifier
attribute station long_name String Station
attribute station units String unitless
variable GEOTRC_SAMPNO   short  
attribute GEOTRC_SAMPNO _FillValue short 32767
attribute GEOTRC_SAMPNO actual_range short 2000, 10386
attribute GEOTRC_SAMPNO description String Unique identifying number for US GEOTRACES samples. PI-supplied values were identical to those in the intermediate US GEOTRACES EPZT master file
attribute GEOTRC_SAMPNO ioos_category String Unknown
attribute GEOTRC_SAMPNO long_name String GEOTRC SAMPNO
attribute GEOTRC_SAMPNO units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double -16.0006, -10.5003
attribute latitude axis String Y
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String Station latitude; north is positive: position when sampling cast was started (2 m sample = underway sample collected typically on approach to station)
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 -152.079, -77.3761
attribute longitude axis String X
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String Station longitude; east is positive; position when sampling cast was started (2 m sample = underway sample collected typically on approach to station)
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 2.0, 5500.0
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 collection depth below sea surface
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 Fe_D_CONC_BOTTLE   float  
attribute Fe_D_CONC_BOTTLE _FillValue float NaN
attribute Fe_D_CONC_BOTTLE actual_range float 0.05, 39.3
attribute Fe_D_CONC_BOTTLE description String Dissolved iron (Fe) concentration value from bottle samples used in the speciation data interpretation. Data received from Mak Saito’s lab at Woods Hole Oceanography Institution; contact Saito for additional information. Units
attribute Fe_D_CONC_BOTTLE ioos_category String Unknown
attribute Fe_D_CONC_BOTTLE long_name String Fe D CONC BOTTLE
attribute Fe_D_CONC_BOTTLE units String nanomoles/liter (10^-9 M)
variable L1Fe_D_CONC_BOTTLE   String  
attribute L1Fe_D_CONC_BOTTLE description String concentration of dissolved iron-binding ligand from bottle samples with log K1 >= 12. "not_detected" used when this parameter was not determined in sample analyses.
attribute L1Fe_D_CONC_BOTTLE ioos_category String Unknown
attribute L1Fe_D_CONC_BOTTLE long_name String L1 Fe D CONC BOTTLE
attribute L1Fe_D_CONC_BOTTLE units String nanomoles/liter (10^-9 M)
variable L1_FLAG   byte  
attribute L1_FLAG _FillValue byte 127
attribute L1_FLAG actual_range byte 1, 9
attribute L1_FLAG colorBarMaximum double 150.0
attribute L1_FLAG colorBarMinimum double 0.0
attribute L1_FLAG description String L1 quality flag
attribute L1_FLAG ioos_category String Quality
attribute L1_FLAG long_name String L1 FLAG
attribute L1_FLAG units String unitless
variable L1_95pcnt_CI   float  
attribute L1_95pcnt_CI _FillValue float NaN
attribute L1_95pcnt_CI actual_range float 0.01, 0.42
attribute L1_95pcnt_CI description String 95% confidence limit of [L1] determined from data fit by ProMCC. Units "nd" = "not detected".
attribute L1_95pcnt_CI ioos_category String Unknown
attribute L1_95pcnt_CI long_name String L1 95pcnt CI
attribute L1_95pcnt_CI units String nanomoles/liter (10^-9 M)
variable L1Fe_D_LogK_BOTTLE   String  
attribute L1Fe_D_LogK_BOTTLE description String log conditional stability constant from bottle samples of L1 complexes with iron (logK^cond FeL1.Fe'). "not_detected" used when this parameter was not determined in sample analyses.
attribute L1Fe_D_LogK_BOTTLE ioos_category String Unknown
attribute L1Fe_D_LogK_BOTTLE long_name String L1 Fe D Log K BOTTLE
attribute L1Fe_D_LogK_BOTTLE units String No units; K1 has units of M-1
variable log_K1_FLAG   byte  
attribute log_K1_FLAG _FillValue byte 127
attribute log_K1_FLAG actual_range byte 1, 9
attribute log_K1_FLAG colorBarMaximum double 150.0
attribute log_K1_FLAG colorBarMinimum double 0.0
attribute log_K1_FLAG description String K1 quality flag
attribute log_K1_FLAG ioos_category String Quality
attribute log_K1_FLAG long_name String Log K1 FLAG
attribute log_K1_FLAG units String unitless
variable log_K1_95pcnt_CI   float  
attribute log_K1_95pcnt_CI _FillValue float NaN
attribute log_K1_95pcnt_CI actual_range float 0.04, 0.78
attribute log_K1_95pcnt_CI description String 95% confidence limit of log K1 determined from data fit by ProMCC. "nd = no data" used when maximum value of 13 assigned due to ProMCC returning values > 13 and large 95% CI indicating results outside of analytical window.
attribute log_K1_95pcnt_CI ioos_category String Unknown
attribute log_K1_95pcnt_CI long_name String Log K1 95pcnt CI
attribute log_K1_95pcnt_CI units String No units; K1 has units of M-1
variable L2Fe_D_CONC_BOTTLE   String  
attribute L2Fe_D_CONC_BOTTLE description String concentration of dissolved iron-binding ligand with log K2 = 11-12 from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L2Fe_D_CONC_BOTTLE ioos_category String Unknown
attribute L2Fe_D_CONC_BOTTLE long_name String L2 Fe D CONC BOTTLE
attribute L2Fe_D_CONC_BOTTLE units String nanomoles/liter (10^-9 M)
variable L2_FLAG   byte  
attribute L2_FLAG _FillValue byte 127
attribute L2_FLAG actual_range byte 1, 9
attribute L2_FLAG colorBarMaximum double 150.0
attribute L2_FLAG colorBarMinimum double 0.0
attribute L2_FLAG description String L2 quality flag
attribute L2_FLAG ioos_category String Quality
attribute L2_FLAG long_name String L2 FLAG
attribute L2_FLAG units String unitless
variable L2_95pcnt_CI   float  
attribute L2_95pcnt_CI _FillValue float NaN
attribute L2_95pcnt_CI actual_range float 0.03, 0.83
attribute L2_95pcnt_CI description String 95% confidence limit of [L2] determined from data fit by ProMCC. Units "nd" = "not detected".
attribute L2_95pcnt_CI ioos_category String Unknown
attribute L2_95pcnt_CI long_name String L2 95pcnt CI
attribute L2_95pcnt_CI units String nanomoles/liter (10^-9 M)
variable L2Fe_D_LogK_BOTTLE   String  
attribute L2Fe_D_LogK_BOTTLE description String log conditional stability constant of L2 complexes with iron (logK^cond FeL2.Fe') from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L2Fe_D_LogK_BOTTLE ioos_category String Unknown
attribute L2Fe_D_LogK_BOTTLE long_name String L2 Fe D Log K BOTTLE
attribute L2Fe_D_LogK_BOTTLE units String No units; K2 has units of M^-1
variable log_K2_FLAG   byte  
attribute log_K2_FLAG _FillValue byte 127
attribute log_K2_FLAG actual_range byte 1, 9
attribute log_K2_FLAG colorBarMaximum double 150.0
attribute log_K2_FLAG colorBarMinimum double 0.0
attribute log_K2_FLAG description String K2 quality flag
attribute log_K2_FLAG ioos_category String Quality
attribute log_K2_FLAG long_name String Log K2 FLAG
attribute log_K2_FLAG units String unitless
variable log_K2_95pcnt_CI   float  
attribute log_K2_95pcnt_CI _FillValue float NaN
attribute log_K2_95pcnt_CI actual_range float 0.03, 0.44
attribute log_K2_95pcnt_CI description String 95% confidence limit of log K2 determined from data fit by ProMCC. "nd" = "not detected".
attribute log_K2_95pcnt_CI ioos_category String Unknown
attribute log_K2_95pcnt_CI long_name String Log K2 95pcnt CI
attribute log_K2_95pcnt_CI units String No units; K2 has units of M^-1
variable L3Fe_D_CONC_BOTTLE   String  
attribute L3Fe_D_CONC_BOTTLE description String concentration of dissolved iron-binding ligand with log K3 = 10-11 from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L3Fe_D_CONC_BOTTLE ioos_category String Unknown
attribute L3Fe_D_CONC_BOTTLE long_name String L3 Fe D CONC BOTTLE
attribute L3Fe_D_CONC_BOTTLE units String nanomoles/liter (10^-9 M)
variable L3_FLAG   byte  
attribute L3_FLAG _FillValue byte 127
attribute L3_FLAG actual_range byte 2, 9
attribute L3_FLAG colorBarMaximum double 150.0
attribute L3_FLAG colorBarMinimum double 0.0
attribute L3_FLAG description String L3 quality flag
attribute L3_FLAG ioos_category String Quality
attribute L3_FLAG long_name String L3 FLAG
attribute L3_FLAG units String unitless
variable L3_95pcnt_CI   float  
attribute L3_95pcnt_CI _FillValue float NaN
attribute L3_95pcnt_CI actual_range float 0.07, 1.19
attribute L3_95pcnt_CI description String 95% confidence limit of [L3] determined from data fit by ProMCC. Units "nd" = "not detected".
attribute L3_95pcnt_CI ioos_category String Unknown
attribute L3_95pcnt_CI long_name String L3 95pcnt CI
attribute L3_95pcnt_CI units String nanomoles/liter (10^-9 M)
variable L3Fe_D_LogK_BOTTLE   String  
attribute L3Fe_D_LogK_BOTTLE description String log conditional stability constant of L3 complexes with iron (logK^cond FeL3.Fe') from bottle samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L3Fe_D_LogK_BOTTLE ioos_category String Unknown
attribute L3Fe_D_LogK_BOTTLE long_name String L3 Fe D Log K BOTTLE
attribute L3Fe_D_LogK_BOTTLE units String No units; K3 has units of M^-1
variable log_K3_FLAG   byte  
attribute log_K3_FLAG _FillValue byte 127
attribute log_K3_FLAG actual_range byte 2, 9
attribute log_K3_FLAG colorBarMaximum double 150.0
attribute log_K3_FLAG colorBarMinimum double 0.0
attribute log_K3_FLAG description String K3 quality flag
attribute log_K3_FLAG ioos_category String Quality
attribute log_K3_FLAG long_name String Log K3 FLAG
attribute log_K3_FLAG units String unitless
variable log_K3_95pcnt_CI   float  
attribute log_K3_95pcnt_CI _FillValue float NaN
attribute log_K3_95pcnt_CI actual_range float 0.03, 0.39
attribute log_K3_95pcnt_CI description String 95% confidence limit of log K3 determined from data fit by ProMCC. "nd" = "not detected".
attribute log_K3_95pcnt_CI ioos_category String Unknown
attribute log_K3_95pcnt_CI long_name String Log K3 95pcnt CI
attribute log_K3_95pcnt_CI units String No units; K3 has units of M^-1
variable Fe_D_CONC_FISH   float  
attribute Fe_D_CONC_FISH _FillValue float NaN
attribute Fe_D_CONC_FISH actual_range float 0.03, 1.08
attribute Fe_D_CONC_FISH description String Dissolved iron (Fe) concentration value used in the speciation data interpretation; from Fish samples. Data received from Mak Saito’s lab at Woods Hole Oceanography Institution; contact Saito for additional information. Units
attribute Fe_D_CONC_FISH ioos_category String Unknown
attribute Fe_D_CONC_FISH long_name String Fe D CONC FISH
attribute Fe_D_CONC_FISH units String nanomoles/liter (10^-9 M)
variable L1Fe_D_CONC_FISH   String  
attribute L1Fe_D_CONC_FISH description String concentration of dissolved iron-binding ligand with log K1 = 12; from Fish samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L1Fe_D_CONC_FISH ioos_category String Unknown
attribute L1Fe_D_CONC_FISH long_name String L1 Fe D CONC FISH
attribute L1Fe_D_CONC_FISH units String nanomoles/liter (10^-9 M)
variable L1_FLAG_FISH   byte  
attribute L1_FLAG_FISH _FillValue byte 127
attribute L1_FLAG_FISH actual_range byte 1, 6
attribute L1_FLAG_FISH colorBarMaximum double 150.0
attribute L1_FLAG_FISH colorBarMinimum double 0.0
attribute L1_FLAG_FISH description String L1 quality flag
attribute L1_FLAG_FISH ioos_category String Quality
attribute L1_FLAG_FISH long_name String L1 FLAG FISH
attribute L1_FLAG_FISH units String unitless
variable L1_95pcnt_CI_FISH   float  
attribute L1_95pcnt_CI_FISH _FillValue float NaN
attribute L1_95pcnt_CI_FISH actual_range float 0.04, 0.31
attribute L1_95pcnt_CI_FISH description String 95% confidence limit of [L1] determined from data fit by ProMCC. Units "nd" = "not detected".
attribute L1_95pcnt_CI_FISH ioos_category String Unknown
attribute L1_95pcnt_CI_FISH long_name String L1 95pcnt CI FISH
attribute L1_95pcnt_CI_FISH units String nanomoles/liter (10^-9 M)
variable L1Fe_D_LogK_FISH   String  
attribute L1Fe_D_LogK_FISH description String log conditional stability constant of L1 complexes with iron (logK^cond FeL1.Fe'); from Fish samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L1Fe_D_LogK_FISH ioos_category String Unknown
attribute L1Fe_D_LogK_FISH long_name String L1 Fe D Log K FISH
attribute L1Fe_D_LogK_FISH units String No units; K1 has units of M-1
variable log_K1_FLAG_FISH   byte  
attribute log_K1_FLAG_FISH _FillValue byte 127
attribute log_K1_FLAG_FISH actual_range byte 1, 7
attribute log_K1_FLAG_FISH colorBarMaximum double 150.0
attribute log_K1_FLAG_FISH colorBarMinimum double 0.0
attribute log_K1_FLAG_FISH description String K1 quality flag
attribute log_K1_FLAG_FISH ioos_category String Quality
attribute log_K1_FLAG_FISH long_name String Log K1 FLAG FISH
attribute log_K1_FLAG_FISH units String unitless
variable log_K1_95pcnt_CI_FISH   float  
attribute log_K1_95pcnt_CI_FISH _FillValue float NaN
attribute log_K1_95pcnt_CI_FISH actual_range float 0.03, 0.4
attribute log_K1_95pcnt_CI_FISH description String 95% confidence limit of log K1 determined from data fit by ProMCC. "nd = no data" used when maximum value of 13 assigned due to ProMCC returning values > 13 and large 95% CI indicating results outside of analytical window.
attribute log_K1_95pcnt_CI_FISH ioos_category String Unknown
attribute log_K1_95pcnt_CI_FISH long_name String Log K1 95pcnt CI FISH
attribute log_K1_95pcnt_CI_FISH units String No units; K1 has units of M-1
variable L2Fe_D_CONC_FISH   String  
attribute L2Fe_D_CONC_FISH description String concentration of dissolved iron-binding ligand with log K2 = 11-12; from Fish samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L2Fe_D_CONC_FISH ioos_category String Unknown
attribute L2Fe_D_CONC_FISH long_name String L2 Fe D CONC FISH
attribute L2Fe_D_CONC_FISH units String nanomoles/liter (10^-9 M)
variable L2_FLAG_FISH   byte  
attribute L2_FLAG_FISH _FillValue byte 127
attribute L2_FLAG_FISH actual_range byte 1, 6
attribute L2_FLAG_FISH colorBarMaximum double 150.0
attribute L2_FLAG_FISH colorBarMinimum double 0.0
attribute L2_FLAG_FISH description String L2 quality flag
attribute L2_FLAG_FISH ioos_category String Quality
attribute L2_FLAG_FISH long_name String L2 FLAG FISH
attribute L2_FLAG_FISH units String unitless
variable L2_95pcnt_CI_FISH   float  
attribute L2_95pcnt_CI_FISH _FillValue float NaN
attribute L2_95pcnt_CI_FISH actual_range float 0.1, 0.47
attribute L2_95pcnt_CI_FISH description String 95% confidence limit of [L2] determined from data fit by ProMCC. Units "nd" = "not detected".
attribute L2_95pcnt_CI_FISH ioos_category String Unknown
attribute L2_95pcnt_CI_FISH long_name String L2 95pcnt CI FISH
attribute L2_95pcnt_CI_FISH units String nanomoles/liter (10^-9 M)
variable L2Fe_D_LogK_FISH   String  
attribute L2Fe_D_LogK_FISH description String log conditional stability constant of L2 complexes with iron (logK^cond FeL2.Fe'); from Fish samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L2Fe_D_LogK_FISH ioos_category String Unknown
attribute L2Fe_D_LogK_FISH long_name String L2 Fe D Log K FISH
attribute L2Fe_D_LogK_FISH units String No units; K2 has units of M^-1
variable log_K2_FLAG_FISH   byte  
attribute log_K2_FLAG_FISH _FillValue byte 127
attribute log_K2_FLAG_FISH actual_range byte 1, 6
attribute log_K2_FLAG_FISH colorBarMaximum double 150.0
attribute log_K2_FLAG_FISH colorBarMinimum double 0.0
attribute log_K2_FLAG_FISH description String K2 quality flag
attribute log_K2_FLAG_FISH ioos_category String Quality
attribute log_K2_FLAG_FISH long_name String Log K2 FLAG FISH
attribute log_K2_FLAG_FISH units String unitless
variable log_K2_95pcnt_CI_FISH   float  
attribute log_K2_95pcnt_CI_FISH _FillValue float NaN
attribute log_K2_95pcnt_CI_FISH actual_range float 0.01, 0.32
attribute log_K2_95pcnt_CI_FISH description String 95% confidence limit of log K2 determined from data fit by ProMCC. "nd" = "not detected".
attribute log_K2_95pcnt_CI_FISH ioos_category String Unknown
attribute log_K2_95pcnt_CI_FISH long_name String Log K2 95pcnt CI FISH
attribute log_K2_95pcnt_CI_FISH units String No units; K2 has units of M^-1
variable L3Fe_D_CONC_FISH   String  
attribute L3Fe_D_CONC_FISH description String concentration of dissolved iron-binding ligand with log K3 = 10-11; from Fish samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L3Fe_D_CONC_FISH ioos_category String Unknown
attribute L3Fe_D_CONC_FISH long_name String L3 Fe D CONC FISH
attribute L3Fe_D_CONC_FISH units String nanomoles/liter (10^-9 M)
variable L3_FLAG_FISH   byte  
attribute L3_FLAG_FISH _FillValue byte 127
attribute L3_FLAG_FISH actual_range byte 2, 6
attribute L3_FLAG_FISH colorBarMaximum double 150.0
attribute L3_FLAG_FISH colorBarMinimum double 0.0
attribute L3_FLAG_FISH description String L3 quality flag
attribute L3_FLAG_FISH ioos_category String Quality
attribute L3_FLAG_FISH long_name String L3 FLAG FISH
attribute L3_FLAG_FISH units String unitless
variable L3_95pcnt_CI_FISH   float  
attribute L3_95pcnt_CI_FISH _FillValue float NaN
attribute L3_95pcnt_CI_FISH actual_range float 0.35, 0.45
attribute L3_95pcnt_CI_FISH description String 95% confidence limit of [L3] determined from data fit by ProMCC. Units "nd" = "not detected".
attribute L3_95pcnt_CI_FISH ioos_category String Unknown
attribute L3_95pcnt_CI_FISH long_name String L3 95pcnt CI FISH
attribute L3_95pcnt_CI_FISH units String nanomoles/liter (10^-9 M)
variable L3Fe_D_LogK_FISH   String  
attribute L3Fe_D_LogK_FISH description String log conditional stability constant of L3 complexes with iron (logK^cond FeL3.Fe'); from Fish samples. "not_detected" used when this parameter was not determined in sample analyses.
attribute L3Fe_D_LogK_FISH ioos_category String Unknown
attribute L3Fe_D_LogK_FISH long_name String L3 Fe D Log K FISH
attribute L3Fe_D_LogK_FISH units String No units; K3 has units of M^-1
variable log_K3_FLAG_FISH   byte  
attribute log_K3_FLAG_FISH _FillValue byte 127
attribute log_K3_FLAG_FISH actual_range byte 2, 6
attribute log_K3_FLAG_FISH colorBarMaximum double 150.0
attribute log_K3_FLAG_FISH colorBarMinimum double 0.0
attribute log_K3_FLAG_FISH description String K3 quality flag
attribute log_K3_FLAG_FISH ioos_category String Quality
attribute log_K3_FLAG_FISH long_name String Log K3 FLAG FISH
attribute log_K3_FLAG_FISH units String unitless
variable log_K3_95pcnt_CI_FISH   float  
attribute log_K3_95pcnt_CI_FISH _FillValue float NaN
attribute log_K3_95pcnt_CI_FISH actual_range float 0.06, 0.22
attribute log_K3_95pcnt_CI_FISH description String 95% confidence limit of log K3 determined from data fit by ProMCC. "nd" = "not detected".
attribute log_K3_95pcnt_CI_FISH ioos_category String Unknown
attribute log_K3_95pcnt_CI_FISH long_name String Log K3 95pcnt CI FISH
attribute log_K3_95pcnt_CI_FISH units String No units; K3 has units of M^-1
variable GEOTRC_EVENTNO   short  
attribute GEOTRC_EVENTNO _FillValue short 32767
attribute GEOTRC_EVENTNO actual_range short 4009, 4467
attribute GEOTRC_EVENTNO description String Unique identifying number for US GEOTRACES sampling event. Added by BCO-DMO from the intermediate US GEOTRACES EPZT master file.
attribute GEOTRC_EVENTNO ioos_category String Unknown
attribute GEOTRC_EVENTNO long_name String GEOTRC EVENTNO
attribute GEOTRC_EVENTNO units String unitless
variable GEOTRC_INSTR   String  
attribute GEOTRC_INSTR description String Unique identifying number for US GEOTRACES instruments. Added by BCO-DMO from the intermediate US GEOTRACES EPZT master file.
attribute GEOTRC_INSTR ioos_category String Unknown
attribute GEOTRC_INSTR long_name String GEOTRC INSTR
attribute GEOTRC_INSTR units String unitless
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.38298632E9, 1.38726444E9
attribute time axis String T
attribute time description String Event start date/time (UTC) formatted to ISO8601 standard. T indicates start of time string; Z indicates UTC. Calculated from original date and time fields. Values were added from the intermediate US GEOTRACES EPZT master file (see Processing Description). Formatted as YYYY-mm-ddTHH:MM:SS.ssZ
attribute time ioos_category String Time
attribute time long_name String ISO DATETIME UTC START EVENT
attribute time source_name String ISO_DATETIME_UTC_START_EVENT
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

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