19:I[42426,["/_next/static/immutable/chunks/1xctgzqre-wsy.js","/_next/static/immutable/chunks/06_-wz6pdtp2b.js","/_next/static/immutable/chunks/30e52g49hg40p.js","/_next/static/immutable/chunks/02yq6tul2z-oh.js","/_next/static/immutable/chunks/10bx_ec2vj7n_.js","/_next/static/immutable/chunks/33bfn03fo8xnt.js","/_next/static/immutable/chunks/0tfjf78scu61b.js","/_next/static/immutable/chunks/31xnvej4n1bi9.js"],"default"] 1a:T10ff,

Methodology: A detailed description can be found in Stichel et al. (2015). See the links below for summaries of the described methodology from the paper.

KN199-04 Methodology (pdf)

KN204-01 Methodology (pdf)

Fig. 1: Sample locations for the Intermediate Data Product.

References: (References listed in the data are codes [1], [2], or [3], corresponding with the following publications/manuscripts)

[1] Stichel, T., Hartman, A.E., Duggan, B., Goldstein, S.L., Scher, H., Pahnke, K., 2015. Separating biogeochemical cycling of neodymium from water mass mixing in the Eastern North Atlantic. Earth Planet. Sci. Lett. 412, 245–260. doi:10.1016/j.epsl.2014.12.008

[2] Hartman, A., Goldstein, S., Pena Gonzalez, L. D., Duggan, B., Pahnke, K., Scher, H., Stichel, T., in prep. Seawater neodymium composition in the open ocean North Atlantic: water mass signatures and transport.

[3] Duggan, B., Hartman, A.E., Stichel, T., Goldstein, S.L., Pahnke, K., Bizimis, M., Scher, H., in prep. Neodymium Concentrations and Isotopic Signature of the Deep Western Boundary Current Across Line W

Table 1: Summary of the procedures applied in the involved laboratories of University of Hawaii at Mano (UH), Lamont-Doherty Earth Observatory (LDEO) and University of South Carolina (USC).

Step	UH	LDEO	USC
Pre-concentration	Spiked with ¹⁴⁶Nd prior to co-precipitation with FeOOH (~20mg Fe per sample)	Spiked with ¹⁵⁰Nd prior to co-precipitation with FeOOH (~20mg Fe per sample)	Nd and REE extraction with C18 cartridges, not spiked
Chromatographic separation	2-step separation: 1. 1.4ml AG50W-X8 (200-400µm) as primary column. 2. 0.7ml AG50W-X8 (200-400µm) with Alpha-HIBA to purify Nd. 3. ~100µl TRU-Spec column for removal of any remaining Alpha-HIBA in samples.	2-step separation: 1. 100µl RE-Spec (100-150µm) as primary column. 2. 0.7ml AG50W-X8 (200-400µm) with Alpha-HIBA to purify Nd.	1-step separation: 2ml LN-Spec (50-100µm) for Nd purification. No primary column needed because major ions were removed during pre-concentration
Mass spectrometry	VG-Sector TIMS, NdO+, spiked for simultaneous isotope dilution and composition analysis	VG-Sector54 TIMS, NdO+, spiked for simultaneous isotope dilution and composition analysis	Thermo Neptune Plus MC-ICPMS
Other			Concentrations were determined on a previously separated 500ml aliquot by isotope dilution

1b:T12bd,

Data Processing:
The measured 143Nd/144Nd isotope ratios were normalized to those of the JNdi-1 Nd standard (0.512115, Tanaka et al., 2000). Please see attached methodology files for further information on the data processing.

BCO-DMO Processing Notes:
- Added the sample_GEOTRC column by copying the original sample column and removing the '_2' from sample duplicates.
- Added Cast_ISO_DateTime_UTC from the original date and time fields.

SUMMARY OF CORRECTIONS MADE TO SUBMITTED DATA:

2017-07-17: parameter descriptions revised as per request by R. Anderson: ND_143_ND_144RATIO and int_ND_143_ND_144RATIO.

version 8: The data for version 8 (April 2016) completely replaced those from version 7.
- The quality flag scheme was changed in accordance with ODV.
- New parameters: EPSILON_Nd, EPSILON_ND_FLAG_W, EPSILON_ND_2SD, Instrument, and Reference were added which are described in the documentation.
- Column cruise_part was removed.
- Version 8b: changed quality flags for KN204-01, stations 3 and 8 from 0 to 2

- 07 March 2013: Made the following corrections after consulting with dataset scientist:

KN199-04
-- Changed cast number of event 3176 from 2 to 8.
-- Changed cast number of event 3169 from 8 to 2.
-- Changed event number of KN199-04 station 3 cast 6 from 2059 to 2061.
-- Changed event number of KN199-04 station 7 cast 6 from 2107 to 2132.
-- Changed event number of KN199-04 station 9 cast 3 from 2059 to 2165.
-- Changed event number of KN199-04 station 10 cast 6 from 2191 to 2194.
-- Changed event number of KN199-04 station 11 cast 6 from 2206 to 2208.
-- Changed bottle number of sample #5393 from 5 to 4 (station 5, cast 6).
-- Changed bottle number of sample #5394 from 4 to 3 (station 5, cast 6).
-- Changed time of event #2024 from 2129 to 1202.

KN204-01
-- Changed bottle number of sample #7955 from 8 to 9 (station 22, cast 4).

Additional data and revisions were served 19 Sept. 2013.

version 9: The last version (8b) of the dataset was split into three datasets by LAB (LDEO, UH, and USC).
See also UH dataset: https://www.bco-dmo.org/dataset/780664
LDEO dataset: https://www.bco-dmo.org/dataset/780582

Additional GEOTRACES Processing:
After the data were submitted to the International Data Management Office, BODC, the office noticed that important identifying information was missing in many datasets. With the agreement of BODC and the US GEOTRACES lead PIs, BCO-DMO added standard US GEOTRACES information, such as the US GEOTRACES event number, to each submitted dataset lacking this information. To accomplish this, BCO-DMO compiled a 'master' dataset composed of the following parameters: station_GEOTRC, cast_GEOTRC (bottle and pump data only), event_GEOTRC, sample_GEOTRC, sample_bottle_GEOTRC (bottle data only), bottle_GEOTRC (bottle data only), depth_GEOTRC_CTD (bottle data only), depth_GEOTRC_CTD_rounded (bottle data only), BTL_ISO_DateTime_UTC (bottle data only), and GeoFish_id (GeoFish data only). This added information will facilitate subsequent analysis and inter comparison of the datasets.

Bottle parameters in the master file were taken from the GT-C_Bottle_GT10, GT-C_Bottle_GT11, ODF_Bottle_GT10, and ODF_Bottle_GT11 datasets. Non-bottle parameters, including those from GeoFish tows, Aerosol sampling, and McLane Pumps, were taken from the Event_Log_GT10 and Event_Log_GT11 datasets. McLane pump cast numbers missing in event logs were taken from the Particulate Th-234 dataset submitted by Ken Buesseler.

A standardized BCO-DMO method (called "join") was then used to merge the missing parameters to each US GEOTRACES dataset, most often by matching on sample_GEOTRC or on some unique combination of other parameters.

If the master parameters were included in the original data file and the values did not differ from the master file, the original data columns were retained and the names of the parameters were changed from the PI-submitted names to the standardized master names. If there were differences between the PI-supplied parameter values and those in the master file, both columns were retained. If the original data submission included all of the master parameters, no additional columns were added, but parameter names were modified to match the naming conventions of the master file.

See the dataset parameters documentation for a description of which parameters were supplied by the PI and which were added via the join method.

1c:T12bf,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)6:["$","$L19",null,{"dataset":{"_id":"3832","description":"

These data are from the collaboration of three different institutes: The University of South Carolina (USC).

Please contact the PI for further information.

See also associated data from the at Manoa (UH) and Lamont-Doherty Earth Observatory (LDEO) of Columbia University.

\n","problem":"","acquisition":"$1a","processing":"$1b","bcodmoProcessing":"","title":"Seawater Nd isotopes and concentrations from the US-GEOTRACES North Atlantic zonal transect (NAZT), 2010 and 2011 on cruises KN199-04 and KN204-01, analyzed by USC","nickname":"GT10-11 - Neodymium - USC","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":false,"restricted":false,"version":"9","version_date":"2019-11-04T05:00:00.000Z","abstract":"Seawater Nd isotopes and concentrations from the US-GEOTRACES North Atlantic zonal transect (NAZT), 2010 and 2011 on cruises KN199-04 and KN204-01, analyzed by USC.","citation":"Duggan, B., Scher, H., Goldstein, S. L., Hartman, A., Pahnke, K., Pena Gonzalez, L. D., Stichel, T. (2020) Seawater Nd isotopes and concentrations from the US-GEOTRACES North Atlantic zonal transect (NAZT), 2010 and 2011 on cruises KN199-04 and KN204-01, analyzed by USC. Biological and Chemical Oceanography Data Management Office (BCO-DMO). 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Pena"},"performedAtOrganization":{"_id":"68","name":"Lamont-Doherty Earth Observatory"}},{"role":{"_id":"130","name":"Scientist"},"performedBy":{"_id":"51620","name":"Torben Stichel"},"performedAtOrganization":{"_id":"126","name":"University of Hawaiʻi at Mānoa"}},{"role":{"_id":"128","name":"Student"},"performedBy":{"_id":"793396","name":"Brian Duggan"},"performedAtOrganization":{"_id":"139","name":"University of South Carolina"}},{"role":{"_id":"128","name":"Student"},"performedBy":{"_id":"51621","name":"Alison Hartman"},"performedAtOrganization":{"_id":"68","name":"Lamont-Doherty Earth Observatory"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"50396","name":"Nancy Copley"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[{"_id":"58066","name":"KN199-04","synonyms":["GA03","GT10","USGT-NAT-2010","KN199-4","GNAT","U.S. GEOTRACES NAZT Leg 1","knorr199-4/5","Section Cruise (GA03)","316N20101015"],"dates":{"start":"2010-10-15T00:00:00.000Z","end":"2010-11-04T00:00:00.000Z"},"platform":{"_id":"53994","name":"R/V Knorr"},"chiefScientists":[{"id":"50745","name":"William J. 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This instrument designation is used when specific make and model are not known or when a more specific term is not available in the BCO-DMO vocabulary. Refer to the dataset-specific metadata for more information about the specific CTD used. More information from: http://www.seabird.com/","type_acronym":"CTD Sea-Bird"},{"_id":"6042","name":"GeoFish","description":"","type_id":"549","type_name":"GeoFish Towed near-Surface Sampler","type_desc":"The GeoFish towed sampler is a custom designed near surface (2 meters or less) sampling system for the collection of trace metal clean seawater. It consists of a PVC encapsulated lead weighted torpedo and separate PVC depressor vane supporting the intake utilizing all PFA Teflon tubing connected to a deck mounted, air-driven, PFA Teflon dual-diaphragm pump which provides trace-metal clean seawater at up to 3.7L/min. The GeoFish is towed at up to 13kts off to the side of the vessel outside of the ship's wake to avoid possible contamination from the ship's hull. It was developed by Geoffrey Smith and Ken Bruland (University of California, Santa Cruz).","type_acronym":"GeoFish"},{"_id":"6004","name":"Mass Spectrometer","description":"Neodymium was measured as NdO+ on a VG TIMS Sector ( at UH) and VG TIMS Sector54 ( at LDEO). At USC, the Nd isotope composition was measured on a Thermo Neptune Plus MC-ICPMS.","type_id":"685","type_name":"Mass Spectrometer","type_desc":"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.","type_acronym":"Mass Spec"},{"_id":"5975","name":"Niskin bottle","description":"30L Niskin bottles with Nylon-coated internal stainless steel springs and Viton o-rings, mounted on a powder-coated aluminum frame.","type_id":"413","type_name":"Niskin bottle","type_desc":"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.","type_acronym":"Niskin bottle"}],"parameters":[{"_id":"643398","name":"cruise_id","format":"","frictionlessType":"","description":"

Official cruise identifier

","units":{"_id":"","name":"unitless"},"type":{"_id":"1102","name":"cruise_id","description":"

cruise designation; name

"}},{"_id":"643399","name":"cruise_name","format":"","frictionlessType":"","description":"

agreed nomenclature on cruise section during ODU-GEOTRACES workshop in March 2013

","units":{"_id":"","name":"unitless"},"type":{"_id":"1929","name":"Cruise Name","description":"

The cruise_name is a local name chosen by project investigators for a research expedition on a vessel, as opposed to the formal/official cruise ID asserted by the vessel operator.

"}},{"_id":"643400","name":"station_GEOTRC","format":"","frictionlessType":"","description":"

station number; provided in original data submission

","units":{"_id":"","name":"unitless"},"type":{"_id":"987","name":"station","description":"

Station identifier; a unique number or alphanumeric string designating a general geographic location at which one or more sampling activities may occur.

"}},{"_id":"643401","name":"depth_ctd","format":"","frictionlessType":"","description":"

sampling depth of CTD; also added are depths of surface sampled by GeoFish. Values provided by PI.

","units":{"_id":"","name":"meters"},"type":{"_id":"808","name":"depth","description":"

Observation/sample depth below the sea surface. Units often reported as: meters, feet.

\nWhen used in a JGOFS/GLOBEC dataset the depth is a best estimate; usually but not always calculated from pressure; calculated either from CTD pressure using Fofonoff and Millard (1982; UNESCO Tech Paper #44) algorithm adjusted for 1980 equation of state for seawater (EOS80) or simply equivalent to nominal depth as recorded during sampling if CTD pressure was unavailable.

"}},{"_id":"643402","name":"depth_GEOTRC_CTD_round","format":"","frictionlessType":"","description":"

sampling depth rounded to nearest meter

","units":{"_id":"","name":"meters"},"type":{"_id":"808","name":"depth","description":"

Observation/sample depth below the sea surface. Units often reported as: meters, feet.

"}},{"_id":"643403","name":"cast_GEOTRC","format":"","frictionlessType":"","description":"

cast number

","units":{"_id":"","name":"unitless"},"type":{"_id":"761","name":"cast","description":"

cast or profile number

"}},{"_id":"643404","name":"event_GEOTRC","format":"","frictionlessType":"","description":"

event number; provided in original data submission

","units":{"_id":"","name":"unitless"},"type":{"_id":"829","name":"event","description":"

Event or operation identifier; event or operation number; often derived from date/time (MMDDHHmm) of sampling and when combined with year (YYYY) is a unique sampling identifier/data processing key. Date/time is not necessarily in GMT.

"}},{"_id":"643405","name":"date","format":"","frictionlessType":"","description":"

date of cast; UTC

","units":{"_id":"","name":"yyyymmdd"},"type":{"_id":"1070","name":"date","description":"

date; generally reported in GMT as YYYYMMDD (year; month; day); also as MMDD (month; day); EqPac dates are local Hawaii time. ISO_Date format is YYYY-MM-DD (http://www.iso.org/iso/home/standards/iso8601.htm)

"}},{"_id":"643406","name":"time","format":"","frictionlessType":"","description":"

time of collection; UTC

","units":{"_id":"","name":"HHMM"},"type":{"_id":"1075","name":"time","description":"

Time GMT defined as HHMM; time of day; generally reported in GMT as HHMM (hours and minutes) but may also be HH.H (decimal hours) or HHMMSS (hours; minutes and seconds); in EqPac time is reported as Hawaii local time

"}},{"_id":"643408","name":"BTL_ISO_DateTime_UTC","format":"","frictionlessType":"","description":"

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).

","units":{"_id":"","name":"YYYY-MM-DDTHH:MM:SS[.xx][+/-TZ]"},"type":{"_id":"1908","name":"ISO_DateTime_UTC","description":"

Date/Time (UTC) ISO formatted
\nThis standard is based on ISO 8601:2004(E) and takes on any of the following forms:
\n2009-08-30T09:05:00[.xx] (local time)
\n2009-08-30T14:05:00[.xx]Z (UTC time)
\n2009-08-30T14:05:00[.xx]-05:00
\nThe dashes and the colons can be dropped.
\nThe T can also be dropped \"by mutual agreement\", but one needs the trailing Z if the time is UTC.

Sample ISO_datetime_utc:
\n2009-08-30T14:05:00[.xx]Z (UTC time)

Format: YYYY-mm-ddTHH:MM:SS[.xx]Z (UTC time)

"}},{"_id":"643409","name":"lat","format":"","frictionlessType":"","description":"

latitude; North is positive.Values were added from the intermediate US GEOTRACES master file (see Processing Description).

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"730","name":"latitude","description":"

latitude, in decimal degrees, North is positive, negative denotes South; Reported in some datasets as degrees, minutes

"}},{"_id":"643410","name":"lon","format":"","frictionlessType":"","description":"

longitude; East is positive.Values were added from the intermediate US GEOTRACES master file (see Processing Description).

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"731","name":"longitude","description":"

longitude, in decimal degrees, East is positive, negative denotes West; Reported in some datsets as degrees, minutes

"}},{"_id":"643411","name":"sample_GEOTRC","format":"","frictionlessType":"","description":"

GEOTRACES sample number; provided in original data submission. Values were added from the intermediate US GEOTRACES master file (see Processing Description) and match those provided by PI.

","units":{"_id":"","name":"unitless"},"type":{"_id":"960","name":"sample","description":"

unique sample identification or number; any combination of alpha numeric characters; precise definition is file dependent

"}},{"_id":"643412","name":"ND_143_ND_144RATIO","format":"","frictionlessType":"","description":"

Final atom ratio of 143Nd/144Nd after correcting mass bias and instrumental offset

","units":{"_id":"","name":"unitless"},"type":{"_id":"1931","name":"Neodymium isotope ratio","description":"

ratio of Neodymium isotopes 143:144.

"}},{"_id":"643413","name":"ND_143_ND_144_FLAG_W","format":"","frictionlessType":"","description":"

Quality flag: Flag 0: good value; Flag 1: no value or unknown value; Flag 2: replacement considered good value; Flag 4: not trusted; -999: missing value

","units":{"_id":"","name":"unitless"},"type":{"_id":"1730","name":"flag","description":"

Data flag. Multiple uses which are dataset dependent. Some uses: data quality, collection occurrence or success, depth indicator. See dataset documentation for specific details

"}},{"_id":"643414","name":"int_ND_143_ND_144RATIO","format":"","frictionlessType":"","description":"

Standard error of the mean using standard deviation divided by the square root of ratios in one measurement (e.g. UH used normally 378 ratios for one measurement)

","units":{"_id":"","name":"unitless"},"type":{"_id":"1931","name":"Neodymium isotope ratio","description":"

ratio of Neodymium isotopes 143:144.

"}},{"_id":"643415","name":"EPSILON_Nd","format":"","frictionlessType":"","description":"

final 143Nd/144Nd normalized to 0.512638 (143Nd1/44Nd of the Chondritic Uniform Reservoir in Jacobsen and Wasserburg - 1980) in parts per 10000.

","units":{"_id":"","name":"parts per 10000"},"type":{"_id":"1073","name":"no_bcodmo_term","description":"

An association with a community-wide standard parameter has not yet been made.

"}},{"_id":"643416","name":"EPSILON_ND_FLAG_W","format":"","frictionlessType":"","description":"

Quality flag: Flag 0: good value; Flag 1: no value or unknown value; Flag 2: replacement considered good value; Flag 4: not trusted; -999: missing value

","units":{"_id":"","name":"unitless"},"type":{"_id":"1730","name":"flag","description":"

Data flag. Multiple uses which are dataset dependent. Some uses: data quality, collection occurrence or success, depth indicator. See dataset documentation for specific details

"}},{"_id":"643417","name":"EPSILON_ND_2SD","format":"","frictionlessType":"","description":"

2 standard deviations of the repeatedly measured standards during the analysis

","units":{"_id":"","name":"parts per 10000"},"type":{"_id":"1974","name":"standard deviation","description":"

Generic standard deviation value, taking on the units of the parameter that it is tied to.

"}},{"_id":"643418","name":"diss_Nd_pmol_kg","format":"","frictionlessType":"","description":"

dissolved Nd concentration

","units":{"_id":"","name":"pmol/kg"},"type":{"_id":"1932","name":"Neodymium","description":"

Elemental Neodymium concentration

(Units could be picomoles/kilogram, millimoles per Liter, etc.)

"}},{"_id":"643419","name":"REE_ND_UH_FLAG_W","format":"","frictionlessType":"","description":"

Quality flag: Flag 0: good value; Flag 1: no value or unknown value; Flag 2: replacement considered good value; Flag 4: not trusted; -999: missing value

","units":{"_id":"","name":"unitless"},"type":{"_id":"1730","name":"flag","description":"

Data flag. Multiple uses which are dataset dependent. Some uses: data quality, collection occurrence or success, depth indicator. See dataset documentation for specific details

"}},{"_id":"643420","name":"LAB","format":"","frictionlessType":"","description":"

the lab group that analyzed the sample: LDEO = Lamont-Doherty Earth Observatory: UH = Univ. of Hawaii; USC = Univ. of South Carolina

","units":{"_id":"","name":"unitless"},"type":{"_id":"1073","name":"no_bcodmo_term","description":"

An association with a community-wide standard parameter has not yet been made.

"}},{"_id":"643421","name":"Instrument","format":"","frictionlessType":"","description":"

instrument used for analysis: TIMS: Thermal ionization mass spectrometer (VG-Sector (UH) or VG-Sector54 (LDEO)); ICPMS: Multi-Collector Inductively Coupled Mass Spectrometer (NeptunePlus)

","units":{"_id":"","name":"unitless"},"type":{"_id":"864","name":"instrument","description":"

instrument used to collect or process data, definition is specific to the data set in which it appears

"}},{"_id":"643422","name":"Reference","format":"","frictionlessType":"","description":"

Publication reference; see Description for details

","units":{"_id":"","name":"unitless"},"type":{"_id":"476271","name":"reference_paper","description":"

A list of papers referred to as a data column, or a publication referenced in a dataset or study.

"}}],"related_publications":[{"id":"780600","citation":"Antle, R.(2013). Tidal Flux of Trace Metals and Rare Earth Elements in a Barrier Island Salt Marsh. (Master's thesis). See https://scholarcommons.sc.edu/etd/1317","relation_type":["Methods"],"relation_desc":""},{"id":"793113","citation":"Basak, C., Pahnke, K., Frank, M., Lamy, F., & Gersonde, R. (2015). Neodymium isotopic characterization of Ross Sea Bottom Water and its advection through the southern South Pacific. Earth and Planetary Science Letters, 419, 211–221. doi:10.1016/j.epsl.2015.03.011\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"747352","citation":"Jacobsen, S. B., & Wasserburg, G. J. (1980). Sm-Nd isotopic evolution of chondrites. Earth and Planetary Science Letters, 50(1), 139–155. doi:10.1016/0012-821x(80)90125-9\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"793114","citation":"Lambelet, M., van de Flierdt, T., Crocket, K., Rehkämper, M., Kreissig, K., Coles, B., … Steinfeldt, R. (2016). Neodymium isotopic composition and concentration in the western North Atlantic Ocean: Results from the GEOTRACES GA02 section. Geochimica et Cosmochimica Acta, 177, 1–29. doi:10.1016/j.gca.2015.12.019\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"747355","citation":"Pahnke, K., van de Flierdt, T., Jones, K. M., Lambelet, M., Hemming, S. R., & Goldstein, S. L. (2012). GEOTRACES intercalibration of neodymium isotopes and rare earth element concentrations in seawater and suspended particles. Part 2: Systematic tests and baseline profiles. Limnology and Oceanography: Methods, 10(4), 252–269. doi:10.4319/lom.2012.10.252\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"780602","citation":"Pin, C., & Zalduegui, J. S. (1997). Sequential separation of light rare-earth elements, thorium and uranium by miniaturized extraction chromatography: Application to isotopic analyses of silicate rocks. Analytica Chimica Acta, 339(1-2), 79–89. doi:10.1016/s0003-2670(96)00499-0\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"749677","citation":"Shabani, M. B., Akagi, T., & Masuda, A. (1992). Preconcentration of trace rare-earth elements in seawater by complexation with bis(2-ethylhexyl) hydrogen phosphate and 2-ethylhexyl dihydrogen phosphate adsorbed on a C18 cartridge and determination by inductively coupled plasma mass spectrometry. Analytical Chemistry, 64(7), 737–743. doi:10.1021/ac00031a008\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"780603","citation":"Stichel, T., Hartman, A. E., Duggan, B., Goldstein, S. L., Scher, H., & Pahnke, K. (2015). Separating biogeochemical cycling of neodymium from water mass mixing in the Eastern North Atlantic. Earth and Planetary Science Letters, 412, 245–260. doi:10.1016/j.epsl.2014.12.008\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"827440","citation":"Stichel, T., Pahnke, K., Duggan, B., Goldstein, S. L., Hartman, A. E., Paffrath, R., & Scher, H. D. (2018). TAG Plume: Revisiting the Hydrothermal Neodymium Contribution to Seawater. Frontiers in Marine Science, 5. doi:10.3389/fmars.2018.00096\r\n","relation_type":["Results"],"relation_desc":""},{"id":"749678","citation":"Tanaka, T., Togashi, S., Kamioka, H., Amakawa, H., Kagami, H., Hamamoto, T., … Dragusanu, C. (2000). JNdi-1: a neodymium isotopic reference in consistency with LaJolla neodymium. Chemical Geology, 168(3-4), 279–281. doi:10.1016/s0009-2541(00)00198-4\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"780604","citation":"Van de Flierdt, T., Pahnke, K., Amakawa, H., Andersson, P., Basak, C., Coles, B., Colin, C., Crocket, K., Frank, M. Frank, N., Goldstein, S., Goswami, V., Haley, B., Hathorne, E., Hemming, S., Henderson, G., Jeandel, C.... Yang, J. (2012). GEOTRACES intercalibration of neodymium isotopes and rare earth element concentrations in seawater and suspended particles. Part 1: reproducibility of results for the international intercomparison. Limnology and Oceanography: Methods, 10(4), 234–251. doi:10.4319/lom.2012.10.234\r\n","relation_type":["Methods"],"relation_desc":""}],"related_datasets":[],"services":[{"grouping":"","items":[{"name":"View Data","description":"An in-browser view of the primary tabular data file","url":"https://www.bco-dmo.org/dataset/3832/data/view","contentType":"text/html","actionType":"view"}]},{"grouping":"Metadata","items":[{"name":"HTML","description":"A simple HTML page of the dataset metadata","url":"https://www.bco-dmo.org/dataset/3832/description","contentType":"text/html","actionType":"view"},{"name":"PDF","description":"A PDF of the HTML dataset metadata","url":"https://www.bco-dmo.org/dataset/3832/Dataset_description.pdf","contentType":"application/pdf","actionType":"download"},{"name":"ISO 19115-2 (NOAA Profile)","description":"","url":"https://www.bco-dmo.org/dataset/3832/iso","contentType":"application/xml","actionType":"download"}]}],"programs":[{"_id":"2022","name":"U.S. GEOTRACES","acronym":"U.S. GEOTRACES"}],"projects":[{"_id":"2066","name":"U.S. GEOTRACES North Atlantic Transect (GA03)","acronym":"U.S. GEOTRACES NAT","description":"$1c"}],"archives":[{"id_value":"10.26008/1912/bco-dmo.3832.9","url":"https://doi.org/10.26008/1912/bco-dmo.3832.9","date_assigned":"2022-05-13","version_date":"2019-11-04","archiver":"Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)","archiver_id":"272"}],"license":{"name":"Creative Commons Attribution 4.0","id":"CC-BY-4.0","uri":"https://creativecommons.org/licenses/by/4.0/","spdxUri":"https://spdx.org/licenses/CC-BY-4.0"},"metrics":{"views":{"count":356},"downloads":{"count":957}}}}]