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Title Sum-
Institution Dataset ID
   set  data   graph     files  public Particulate Thorium-234 from in situ pumps from R/V Knorr cruises KN199-04 and KN204-01 in
the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project)
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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 Particulate material was collected using in situ McLane pumps (also see data
from Charette and Lam groups). All data were decay corrected back to the mid-
pump times.

1-51 um Th-234
On KN199-4, the mesh screens were cut in half and the material from one half
was rinsed onto a silver filter and dried down. On KN 204-01a and KN 204-01b,
the whole mesh screen was rinsed onto a silver filter and dried down. The mean
volume pumped through the whole Supor mesh screens was 475 L.

>51 um Th-234
Whole QMAs, located below a mesh screen in the filter head housing, were
oven-dried upon recovery. A 25 mm subsample was taken from this whole filter
for beta counting for Th-234. The mean effective volume for the 25 mm QMA
subsample was 47 L.
attribute NC_GLOBAL awards_0_award_nid String 55131
attribute NC_GLOBAL awards_0_award_number String OCE-0925158
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward?AWD_ID=0925158&HistoricalAwards=false (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 Donald L. Rice
attribute NC_GLOBAL awards_0_program_manager_nid String 51467
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Particulate Th-234 from in situ pumps:
large size fraction (> 51 um) and small size fraction (1-51 um)
PI: Ken Buesseler (WHOI)
Version: 31 Dec 2012

Please note that data may not be final, pending intercalibration results and
further analysis. If you are interested in following changes to US GEOTRACES
NAT data, there is an RSS feed available via the BCO-DMO US GEOTRACES
<a href="https://www.bco-dmo.org/project/2066" target="_blank">project page</a>.
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 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2013-01-03T20:02:28Z
attribute NC_GLOBAL date_modified String 2020-03-30T19:20:19Z
attribute NC_GLOBAL defaultDataQuery String &amp;time&lt;now
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.3835.1
attribute NC_GLOBAL Easternmost_Easting double -9.663
attribute NC_GLOBAL geospatial_lat_max double 39.695
attribute NC_GLOBAL geospatial_lat_min double 17.35
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -9.663
attribute NC_GLOBAL geospatial_lon_min double -69.808
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 5485.0
attribute NC_GLOBAL geospatial_vertical_min double 26.0
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/3835 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String McLane Pump
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Particulate material was collected using in situ McLane pumps.
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 5979
attribute NC_GLOBAL instruments_0_description String McLane pumps sample large volumes of seawater at depth. They are attached to a wire and lowered to different depths in the ocean. As the water is pumped through the filter, particles suspended in the ocean are collected on the filters. The pumps are then retrieved and the contents of the filters are analyzed in a lab.
attribute NC_GLOBAL instruments_0_instrument_name String McLane Pump
attribute NC_GLOBAL instruments_0_instrument_nid String 627
attribute NC_GLOBAL instruments_0_supplied_name String McLane Pump
attribute NC_GLOBAL keywords String 1to51, bco, bco-dmo, biological, bottle, bottle_GEOTRC, btl, BTL_ISO_DateTime_UTC, cast, cast_GEOTRC, chemical, cruise, cruise_id, cruise_part, data, dataset, date, day, day_gmt, depth, depth_GEOTRC_CTD, depth_n, dmo, erddap, event, event_GEOTRC, flag, geotrc, gt51, iso, latitude, longitude, management, month, month_gmt, oceanography, office, part, preliminary, pump, q_flag, sample, sample_bottle_GEOTRC, sample_GEOTRC, station, station_GEOTRC, th234, Th234_p_1to51, Th234_p_1to51_unc, Th234_p_gt51, Th234_p_gt51_unc, time, time_gmt, unc, year
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/3835/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/3835 (external link)
attribute NC_GLOBAL Northernmost_Northing double 39.695
attribute NC_GLOBAL param_mapping String {'3835': {'lat': 'flag - latitude', 'depth': 'flag - depth', 'lon': 'flag - longitude', 'ISO_DateTime_UTC': 'flag - time'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/3835/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_0_affiliation_acronym String WHOI
attribute NC_GLOBAL people_0_person_name String Kenneth O. Buesseler
attribute NC_GLOBAL people_0_person_nid String 50522
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
attribute NC_GLOBAL people_1_person_name String Stephanie Owens
attribute NC_GLOBAL people_1_person_nid String 51616
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 Shannon Rauch
attribute NC_GLOBAL people_2_person_nid String 51498
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 U.S. GEOTRACES NAT
attribute NC_GLOBAL projects_0_acronym String U.S. GEOTRACES NAT
attribute NC_GLOBAL projects_0_description String Much of this text appeared in an article published in OCB News, October 2008, by the OCB Project Office.
The first U.S. GEOTRACES Atlantic Section will be specifically centered around a sampling cruise to be carried out in the North Atlantic in 2010. Ed Boyle (MIT) and Bill Jenkins (WHOI) organized a three-day planning workshop that was held September 22-24, 2008 at the Woods Hole Oceanographic Institution. The main goal of the workshop, sponsored by the National Science Foundation and the U.S. GEOTRACES Scientific Steering Committee, was to design the implementation plan for the first U.S. GEOTRACES Atlantic Section. The primary cruise design motivation was to improve knowledge of the sources, sinks and internal cycling of Trace Elements and their Isotopes (TEIs) by studying their distributions along a section in the North Atlantic (Figure 1). The North Atlantic has the full suite of processes that affect TEIs, including strong meridional advection, boundary scavenging and source effects, aeolian deposition, and the salty Mediterranean Outflow. The North Atlantic is particularly important as it lies at the "origin" of the global Meridional Overturning Circulation.
It is well understood that many trace metals play important roles in biogeochemical processes and the carbon cycle, yet very little is known about their large-scale distributions and the regional scale processes that affect them. Recent advances in sampling and analytical techniques, along with advances in our understanding of their roles in enzymatic and catalytic processes in the open ocean provide a natural opportunity to make substantial advances in our understanding of these important elements. Moreover, we are motivated by the prospect of global change and the need to understand the present and future workings of the ocean's biogeochemistry. The GEOTRACES strategy is to measure a broad suite of TEIs to constrain the critical biogeochemical processes that influence their distributions. In addition to these "exotic" substances, more traditional properties, including macronutrients (at micromolar and nanomolar levels), CTD, bio-optical parameters, and carbon system characteristics will be measured. The cruise starts at Line W, a repeat hydrographic section southeast of Cape Cod, extends to Bermuda and subsequently through the North Atlantic oligotrophic subtropical gyre, then transects into the African coast in the northern limb of the coastal upwelling region. From there, the cruise goes northward into the Mediterranean outflow. The station locations shown on the map are for the "fulldepth TEI" stations, and constitute approximately half of the stations to be ultimately occupied.
Figure 1. The proposed 2010 Atlantic GEOTRACES cruise track plotted on dissolved oxygen at 400 m depth. Data from the World Ocean Atlas (Levitus et al., 2005) were plotted using Ocean Data View (courtesy Reiner Schlitzer). [click on the image to view a larger version]
Hydrography, CTD and nutrient measurements will be supported by the Ocean Data Facility (J. Swift) at Scripps Institution of Oceanography and funded through NSF Facilities. They will be providing an additional CTD rosette system along with nephelometer and LADCP. A trace metal clean Go-Flo Rosette and winch will be provided by the group at Old Dominion University (G. Cutter) along with a towed underway pumping system.
The North Atlantic Transect cruise began in 2010 with KN199 leg 4 (station sampling) and leg 5 (underway sampling only) (Figure 2).
KN199-04 Cruise Report (PDF)
Figure 2. The red line shows the cruise track for the first leg of the US Geotraces North Atlantic Transect on the R/V Knorr in October 2010.  The rest of the stations (beginning with 13) will be completed in October-December 2011 on the R/V Knorr (courtesy of Bill Jenkins, Chief Scientist, GNAT first leg). [click on the image to view a larger version]
The section completion effort resumed again in November 2011 with KN204-01A,B (Figure 3).
KN204-01A,B Cruise Report (PDF)
Figure 3. Station locations occupied on the US Geotraces North Atlantic Transect on the R/V Knorr in November 2011.  [click on the image to view a larger version]
Data from the North Atlantic Transect cruises are available under the Datasets heading below, and consensus values for the SAFe and North Atlantic GEOTRACES Reference Seawater Samples are available from the GEOTRACES Program Office: Standards and Reference Materials
ADCP data are available from the Currents ADCP group at the University of Hawaii at the links below:KN199-04   (leg 1 of 2010 cruise; Lisbon to Cape Verde)KN199-05   (leg 2 of 2010 cruise; Cape Verde to Charleston, NC)KN204-01A (part 1 of 2011 cruise; Woods Hole, MA to Bermuda)KN204-01B (part 2 of 2011 cruise; Bermuda to Cape Verde)
attribute NC_GLOBAL projects_0_end_date String 2013-08
attribute NC_GLOBAL projects_0_geolocation String Subtropical western and eastern North Atlantic Ocean
attribute NC_GLOBAL projects_0_name String U.S. GEOTRACES North Atlantic Transect
attribute NC_GLOBAL projects_0_project_nid String 2066
attribute NC_GLOBAL projects_0_project_website String http://www.geotraces.org/ (external link)
attribute NC_GLOBAL projects_0_start_date String 2010-10
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 17.35
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL subsetVariables String q_flag
attribute NC_GLOBAL summary String Particulate Th-234 from in situ pumps, including large size fraction (> 51 um) and small size fraction (1-51 um), from the 2010 and 2011 U.S. GEOTRACES cruises.
attribute NC_GLOBAL time_coverage_end String 2011-12-10T14:03:00.00Z
attribute NC_GLOBAL time_coverage_start String 2010-10-16T10:26:00.00Z
attribute NC_GLOBAL title String Particulate Thorium-234 from in situ pumps from R/V Knorr cruises KN199-04 and KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -69.808
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable cruise_id   String  
attribute cruise_id bcodmo_name String cruise_id
attribute cruise_id description String Official cruise identifier e.g. KN199-04 = R/V Knorr cruise number 199-04.
attribute cruise_id long_name String Cruise Id
attribute cruise_id units String text
variable station_GEOTRC   byte  
attribute station_GEOTRC _FillValue byte 127
attribute station_GEOTRC actual_range byte 1, 24
attribute station_GEOTRC bcodmo_name String station
attribute station_GEOTRC description String GEOTRACES station number; ranges from 1 through 12 for KN199-04 and 1 through 24 for KN204-01. Stations 7 and 9 were skipped on KN204-01. PI-supplied values were identical to those in the
intermediate US GEOTRACES master file. Originally submitted as 'Station', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute station_GEOTRC long_name String Station GEOTRC
attribute station_GEOTRC units String unitless
variable cruise_part   String  
attribute cruise_part bcodmo_name String cruise_part
attribute cruise_part description String Part of cruise. For KN204-01:
A = 11/6/2011 to 11/18/2011 (Woods Hole to Bermuda)
B = 11/19/2011 to 12/11/2011 (Bermuda to Praia, Cabo Verde)
attribute cruise_part long_name String Cruise Part
attribute cruise_part units String text
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 17.35, 39.695
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. Positive = North.
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/ (external link)
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 -69.808, -9.663
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. Negative = West.
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/ (external link)
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable event_GEOTRC   short  
attribute event_GEOTRC _FillValue short 32767
attribute event_GEOTRC actual_range short 2009, 3282
attribute event_GEOTRC bcodmo_name String event
attribute event_GEOTRC description String Unique identifying number for US GEOTRACES sampling events; ranges from 2001 to 2225 for KN199-04 events and from 3001 to 3282 for KN204-01 events. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Event #', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute event_GEOTRC long_name String Event GEOTRC
attribute event_GEOTRC nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/ (external link)
attribute event_GEOTRC units String unitless
variable cast_GEOTRC   byte  
attribute cast_GEOTRC _FillValue byte 127
attribute cast_GEOTRC actual_range byte 2, 9
attribute cast_GEOTRC bcodmo_name String cast
attribute cast_GEOTRC description String Cast identifier, numbered consecutively within a station. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Cast', this parameter
name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute cast_GEOTRC long_name String Cast GEOTRC
attribute cast_GEOTRC units String unitless
variable month_gmt   byte  
attribute month_gmt _FillValue byte 127
attribute month_gmt actual_range byte 10, 12
attribute month_gmt bcodmo_name String month_gmt
attribute month_gmt description String 2-digit month of year (GMT). in the format mm (01 to 12)
attribute month_gmt long_name String Month Gmt
attribute month_gmt units String unitless
variable day_gmt   String  
attribute day_gmt bcodmo_name String day_gmt
attribute day_gmt description String 2-digit day of month (GMT). in the format dd (01 to 31)
attribute day_gmt long_name String Day Gmt
attribute day_gmt units String unitless
variable year   short  
attribute year _FillValue short 32767
attribute year actual_range short 2010, 2011
attribute year bcodmo_name String year
attribute year description String 4-digit year. in the format YYYY
attribute year long_name String Year
attribute year nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/ (external link)
attribute year units String unitless
variable time_gmt   String  
attribute time_gmt bcodmo_name String time_gmt
attribute time_gmt description String Time (GMT); 24-hour clock. in the format HHMM
attribute time_gmt long_name String Time Gmt
attribute time_gmt units String unitless
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.28722476E9, 1.32352578E9
attribute time axis String T
attribute time bcodmo_name String ISO_DateTime_UTC
attribute time description String Cast date/time (UTC) formatted to ISO8601 standard. T indicates start of time string; Z indicates UTC. Calculated from original date and time fields.
attribute time ioos_category String Time
attribute time long_name String ISO Date Time UTC
attribute time nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/ (external link)
attribute time source_name String ISO_DateTime_UTC
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time time_precision String 1970-01-01T00:00:00.00Z
attribute time units String seconds since 1970-01-01T00:00:00Z
variable depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 26.0, 5485.0
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 Actual sample depth; provided in original data submission.
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/ (external link)
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable depth_n   short  
attribute depth_n _FillValue short 32767
attribute depth_n actual_range short 26, 5480
attribute depth_n bcodmo_name String depth_n
attribute depth_n colorBarMaximum double 8000.0
attribute depth_n colorBarMinimum double -8000.0
attribute depth_n colorBarPalette String TopographyDepth
attribute depth_n description String Nominal sample depth.
attribute depth_n long_name String Depth
attribute depth_n standard_name String depth
attribute depth_n units String meters
variable depth_GEOTRC_CTD   float  
attribute depth_GEOTRC_CTD _FillValue float NaN
attribute depth_GEOTRC_CTD actual_range float 748.5, 4889.6
attribute depth_GEOTRC_CTD bcodmo_name String depth
attribute depth_GEOTRC_CTD colorBarMaximum double 8000.0
attribute depth_GEOTRC_CTD colorBarMinimum double -8000.0
attribute depth_GEOTRC_CTD colorBarPalette String TopographyDepth
attribute depth_GEOTRC_CTD description String Observation/sample depth in meters, calculated from CTD pressure. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
attribute depth_GEOTRC_CTD long_name String Depth
attribute depth_GEOTRC_CTD nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth_GEOTRC_CTD standard_name String depth
attribute depth_GEOTRC_CTD units String meters
variable sample_GEOTRC   short  
attribute sample_GEOTRC _FillValue short 32767
attribute sample_GEOTRC actual_range short 5033, 8148
attribute sample_GEOTRC bcodmo_name String sample
attribute sample_GEOTRC description String Unique identifying number for US GEOTRACES samples; ranges from 5033 to 6078 for KN199-04 and from 6112 to 8148 for KN204-01. PI-supplied values were identical to those in the intermediate US GEOTRACES master file. Originally submitted as 'Geotraces #', this parameter name has been changed to conform to BCO-DMO's GEOTRACES naming conventions.
attribute sample_GEOTRC long_name String Sample GEOTRC
attribute sample_GEOTRC nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/ACYC/ (external link)
attribute sample_GEOTRC units String unitless
variable sample_bottle_GEOTRC   byte  
attribute sample_bottle_GEOTRC _FillValue byte 127
attribute sample_bottle_GEOTRC actual_range byte 1, 8
attribute sample_bottle_GEOTRC bcodmo_name String bot_Nis
attribute sample_bottle_GEOTRC description String Unique identification numbers given to samples taken from bottles; ranges from 1 to 24; often used synonymously with bottle number. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
attribute sample_bottle_GEOTRC long_name String Sample Bottle GEOTRC
attribute sample_bottle_GEOTRC units String unitless
variable bottle_GEOTRC   String  
attribute bottle_GEOTRC bcodmo_name String bottle
attribute bottle_GEOTRC description String Alphanumeric characters identifying bottle type (e.g., NIS representing Niskin and GF representing GOFLO) and position on a CTD rosette. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
attribute bottle_GEOTRC long_name String Bottle GEOTRC
attribute bottle_GEOTRC units String unitless
variable pump   byte  
attribute pump _FillValue byte 127
attribute pump actual_range byte 1, 9
attribute pump bcodmo_name String unknown
attribute pump description String Pump number.
attribute pump long_name String Pump
attribute pump units String unitless
variable Th234_p_1to51   float  
attribute Th234_p_1to51 _FillValue float NaN
attribute Th234_p_1to51 actual_range float 0.0154, 1.1519
attribute Th234_p_1to51 bcodmo_name String Th234 particulate activity
attribute Th234_p_1to51 description String Particulate Thorium-234 from QMA filters. Particle size of 1 to 51 um. Data were decay corrected back to mid-pump times.
attribute Th234_p_1to51 long_name String Th234 P 1to51
attribute Th234_p_1to51 units String dpm/Liter
variable Th234_p_1to51_unc   float  
attribute Th234_p_1to51_unc _FillValue float NaN
attribute Th234_p_1to51_unc actual_range float 0.0018, 0.0432
attribute Th234_p_1to51_unc bcodmo_name String unknown
attribute Th234_p_1to51_unc description String Th234_p_1to51 uncertainty.
attribute Th234_p_1to51_unc long_name String Th234 P 1to51 Unc
attribute Th234_p_1to51_unc units String dpm/Liter
variable Th234_p_gt51   float  
attribute Th234_p_gt51 _FillValue float NaN
attribute Th234_p_gt51 actual_range float 0.0013, 0.0881
attribute Th234_p_gt51 bcodmo_name String Th234 particulate activity
attribute Th234_p_gt51 description String Particulate Thorium-234 from mesh screens, filtered onto silver filters. Particle size greater than 51 um. Data were decay corrected back to mid-pump times.
attribute Th234_p_gt51 long_name String TH234 P GT51
attribute Th234_p_gt51 units String dpm/Liter
variable Th234_p_gt51_unc   float  
attribute Th234_p_gt51_unc _FillValue float NaN
attribute Th234_p_gt51_unc actual_range float 1.0E-4, 0.0013
attribute Th234_p_gt51_unc bcodmo_name String unknown
attribute Th234_p_gt51_unc description String Th234_p_gt51 uncertainty.
attribute Th234_p_gt51_unc long_name String Th234 P Gt51 Unc
attribute Th234_p_gt51_unc units String dpm/Liter
variable q_flag   byte  
attribute q_flag _FillValue byte 127
attribute q_flag actual_range byte 1, 1
attribute q_flag bcodmo_name String q_flag
attribute q_flag colorBarMaximum double 150.0
attribute q_flag colorBarMinimum double 0.0
attribute q_flag description String Quality flag:
1 = Good
2 = Questionable
3 = Bad
attribute q_flag long_name String Q Flag
attribute q_flag units String unitless
variable BTL_ISO_DateTime_UTC   String  
attribute BTL_ISO_DateTime_UTC bcodmo_name String ISO_DateTime_UTC
attribute BTL_ISO_DateTime_UTC description String Date and time (UTC) variable recorded at the bottle sampling time in ISO compliant format. Values were added from the intermediate US GEOTRACES master file (see Processing Description).
This standard is based on ISO 8601:2004(E) and takes on the following form: 2009-08-30T14:05:00[.xx]Z (UTC time)
attribute BTL_ISO_DateTime_UTC long_name String BTL ISO Date Time UTC
attribute BTL_ISO_DateTime_UTC nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/ (external link)
attribute BTL_ISO_DateTime_UTC 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.

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