1b: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"] 1c:T908,

Seawater samples were collected during the GEOTRACES GP16 cruise on R/V Thomas G. Thompson (TN303) along the East Pacific Zonal Transect in 2013. Five liters (L) of seawater were collected and stored in a cubitainer for each sample. The samples were filtered using 0.2-micrometer (μm) Sartobran cartridges and acidified using ultrapure Seastar hydrochloric acid (HCl) to pH ~ 2 shortly after sampling.

For neodymium (Nd) isotope analysis, rare-earth elements (REEs) were preconcentrated from seawater using C18 cartridges (Waters Corp., Sep-Pak classic, 360-milligrams (mg), 55-105 μm) loaded with complexing agent composed of a mixture of 2-ethylhexyl hydrogen phosphate (HDEHP) and 2-ethylhexyl dihydrogen phosphate (H2MEHP), which was first proposed by Shabani et al. (1992). In this study, we followed the methods by Jeandel et al. (1998), Lacan and Jeandel (2001), and Pahnke et al. (2012). Specifically, C18 cartridges were first cleaned in a 0.5 N HCl bath overnight, passed through 10 milliliters (mL) of 6 N HCl and then flushed with >500 mL of Milli-Q water. Cartridges were stored in Milli-Q water after cleaning. 300 μL of complexing agent HDEHP/H2MEHP was loaded on a clean cartridge for a 5 L sample. Seawater samples were adjusted to pH ≈ 3.5 by adding Optima® ammonium hydroxide before being pumped through the cartridges at 20 mL/minute by a peristaltic pump in the ultra-clean chemistry laboratory at LDEO. Cartridges were then eluted with 10 mL of 0.01 N HCl to remove barium. After barium elution, cartridges were eluted with 35 mL of 6 N HCl at 10 mL/minute by a peristaltic pump to collect REEs. REEs were dried and further purified by TRU-spec column chemistry. Nd fractions were extracted from REEs by LN-spec column chemistry and dried. They were redissolved in 0.3 mL of 3% HNO3 for the Nd isotope analysis.

For REE concentration analysis, a multi-element REE spike enriched in 138La, 142Ce, 145Nd, 149Sm, 153Eu, 155Gd, 161Dy, 167Er, 171Yb, and 176Lu (Wu et al., 2020) was added to each sample (~10 mL). The sample-spike mixture was allowed to equilibrate for at least 24 hours and then was purified and pre-concentrated through the seaFast Automated Preconcentration System for Undiluted Seawater (Elemental Scientific Inc. or ESI, Omaha, Nebraska, USA).

1d:Tdf7,From the NSF Award Abstract The mission of the International GEOTRACES Program (https://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]1e:T6fd,NSF abstract: Neodymium isotopes (Nd) and rare earth elements (REE) are recognized by the GEOTRACES program as key trace elements and isotopes (TEIs) because they trace the sources and mixing of water masses. Therefore, transport data generated by Nd measurements will potentially advance our understanding on the dominant processes that drive TEI distribution in the ocean. There is a particular need for Nd measurements in the South Pacific because current observations do not agree with GCM models. Researchers from Columbia University and Oregon State University will analyze seawater, aerosols, water column particulates, and sea-floor sediments for Nd, strontrium, and REE during the upcoming 2013 GEOTRACES cruise. Because of the geographical transect of the GEOTRACES Pacific section cruise, investigators will assess impacts made by a suite of biological, chemical, and physical processes including: boundary exchange, high productivity, surface addition from aerosols, addition to bottom waters from detached nephloid layers, particles from hydrothermal vents, reversible scavenging, and groundwater fluxes. Furthermore, within the Peru-Chili Oxygen Minimum Zone (OMZ), investigators will utilize the TEI cerium to better understand relative effects of lateral and vertical processes. By improving understanding of the distribution of TEIs, results will also enhance biogeochemical models and advance knowledge of climate systems. Broader Impacts: Research will advance careers of two young scientists, support education and training of Ph.D. and undergraduate students, and provide materials for outreach activities. Additionally, results will be published in scientific journals and all data will be submitted to the Biological and Chemical Oceanography Data Management Office.6:["$","$L1b",null,{"dataset":{"_id":"915447","description":"","problem":"","acquisition":"$1c","processing":"

The Nd isotopic composition is expressed as:

εNd = [(¹⁴³Nd/¹⁴⁴Ndsample/¹⁴³Nd/¹⁴⁴NdCHUR) - 1] × 10⁴

This study uses ¹⁴³Nd/¹⁴⁴NdCHUR = 0.512638 (Jacobsen and Wasserburg, 1980).

\n","bcodmoProcessing":"- Imported original file \"DOoR_GEOTRACES GP16_eNd&REEs_LDEO.xlsx\" into the BCO-DMO system.\r\n- Flagged '-999' values as missing data values (missing data are blank/empty in the final CSV file).\r\n- Renamed fields to comply with BCO-DMO naming conventions.\r\n- Created the date/time field in ISO 8601 format.\r\n- Removed the end lat/lon and end date/time columns (all empty).\r\n- Saved the final file as \"915447_v1_gp16_diss_nd_and_rees_ldeo.csv\".\r\n","title":"Dissolved neodymium (Nd) isotopes and concentrations of rare-earth elements (REEs) reported by LDEO in seawater samples collected during the GEOTRACES GP16 East Pacific Zonal Transect cruise (TN303) on R/V Thomas G. Thompson from October to December 2013","nickname":"GP16 Dissolved Nd Isotopes and REEs - LDEO","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":true,"restricted":false,"version":"1","version_date":"2023-12-19T05:00:00.000Z","abstract":"This dataset includes dissolved neodymium (Nd) isotopes and concentrations of rare earth elements (REEs) in seawater samples collected along the GEOTRACES GP16 East Pacific Zonal Transect. The cruise was aboard the R/V Thomas G. Thompson between October 25 and December 20, 2013 from Manta, Ecuador to Papeete, Tahiti. Multicollector-inductively coupled plasma-mass spectrometry (MC-ICP-MS) was used to analyze Nd isotopes and quadrupole ICP‐MS was used to analyze REE concentrations.\r\n\r\nThis cruise provides a great opportunity to understand sources, sinks, and cycling of REEs in the ocean as well as how well Nd isotopes behave as a conservative water mass tracer. The data were collected by Yingzhe Wu and Chandranath Basak at Lamont-Doherty Earth Observatory of Columbia University.\r\n","citation":"Wu, Y., Basak, C., Pena , L. D., Bolge, L. L., Goldstein, S. L. (2023) Dissolved neodymium (Nd) isotopes and concentrations of rare-earth elements (REEs) reported by LDEO in seawater samples collected during the GEOTRACES GP16 East Pacific Zonal Transect cruise (TN303) on R/V Thomas G. Thompson from October to December 2013. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-12-19 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.915447.1 [access date]","citationParts":{"identifier":"doi:10.26008/1912/bco-dmo.915447.1","versionDate":"2023-12-19","versionId":"1","year":"2023","title":"Dissolved neodymium (Nd) isotopes and concentrations of rare-earth elements (REEs) reported by LDEO in seawater samples collected during the GEOTRACES GP16 East Pacific Zonal Transect cruise (TN303) on R/V Thomas G. Thompson from October to December 2013","authors":"Wu, Y., Basak, C., Pena , L. D., Bolge, L. L., Goldstein, S. L.","publisher":"Biological and Chemical Oceanography Data Management Office (BCO-DMO)."},"doi":"10.26008/1912/bco-dmo.915447.1","release_date":null,"field_dataset_location":"","temporal_extent":{"start":"2013-10-29T04:00:00.000Z","end":"2013-12-18T05:00:00.000Z"},"temporal":{"resolution":"time:unitDay","type":"time:Interval","start":{"value":"1383019200","label":"2013-10-29"},"end":{"value":"1387342800","label":"2013-12-18"}},"spatial_extent":{"shape":"polygon","center":{"latitude":-13.25045,"longitude":-114.868},"wkt":"POLYGON ((-152.079 -16.0006, -77.657 -16.0006, -77.657 -10.5003, -152.079 -10.5003, -152.079 -16.0006))","north":-10.5003,"east":-77.657,"south":-16.0006,"west":-152.079},"dataset_type":["Cruise Results"],"keywords":["oceans"],"data_files":[{"id":"917630","title":"915447_v1_gp16_diss_nd_and_rees_ldeo.csv","url":"https://datadocs.bco-dmo.org/dataset/915447/file/4WGDL3PImqBEK8/915447_v1_gp16_diss_nd_and_rees_ldeo.csv","showTableUrl":"https://www.bco-dmo.org/dataset/915447/data/view/917630","description":"Primary data file for dataset ID 915447, version 1","filename":"915447_v1_gp16_diss_nd_and_rees_ldeo.csv","bytesize":90239,"checksum":{"value":"6be91f8240988af0da9f1fb13b1ab0a0","Algorithm":{"_id":"190","name":"MD5"}},"mimetype":"text/csv","fileType":{"_id":"192","name":"Comma Separated Values (.csv)"},"isErddap":"bcodmo_dataset_915447_v1","date":"","isPublicDuringEmbargo":false,"primaryDataFile":true,"showTable":true,"restricted":false}],"supplemental_files":[],"roles":[{"role":{"_id":"138","name":"Principal Investigator"},"performedBy":{"_id":"51618","name":"Steven L. Goldstein"},"performedAtOrganization":{"_id":"68","name":"Lamont-Doherty Earth Observatory"}},{"role":{"_id":"140","name":"Co-Principal Investigator"},"performedBy":{"_id":"672210","name":"Leopoldo D. Pena"},"performedAtOrganization":{"_id":"672205","name":"University of Barcelona"}},{"role":{"_id":"133","name":"Contact"},"performedBy":{"_id":"672219","name":"Yingzhe Wu"},"performedAtOrganization":{"_id":"68","name":"Lamont-Doherty Earth Observatory"}},{"role":{"_id":"134","name":"Analyst"},"performedBy":{"_id":"917313","name":"Chandranath Basak"},"performedAtOrganization":{"_id":"68","name":"Lamont-Doherty Earth Observatory"}},{"role":{"_id":"134","name":"Analyst"},"performedBy":{"_id":"672219","name":"Yingzhe Wu"},"performedAtOrganization":{"_id":"68","name":"Lamont-Doherty Earth Observatory"}},{"role":{"_id":"135","name":"Technician"},"performedBy":{"_id":"877616","name":"Louise L. Bolge"},"performedAtOrganization":{"_id":"68","name":"Lamont-Doherty Earth Observatory"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"51498","name":"Shannon Rauch"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[{"_id":"499719","name":"TN303","synonyms":["GP16","GEOTRACES EPZT","GEOTRACES East Pacific Zonal Transect (EPZT)","GT13","325020131025"],"dates":{"start":"2013-10-25T00:00:00.000Z","end":"2013-12-20T00:00:00.000Z"},"platform":{"_id":"54017","name":"R/V Thomas G. Thompson"},"chiefScientists":[{"id":"50800","name":"James W. Moffett","role":"Chief Scientist"},{"id":"50679","name":"Gregory A. Cutter","role":"Co-Chief Scientist"},{"id":"51700","name":"Christopher R. German","role":"Co-Chief Scientist"}]}],"funding":[{"_id":"779182","name":"OCE-1234687","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1234687"}],"instruments":[{"_id":"917460","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":"915667","name":"Thermo Scientific Neptune-Plus® multicollector-inductively coupled plasma-mass spectrometer (MC-ICP-MS)","description":"The Nd isotopic compositions were measured by a Thermo Scientific Neptune-Plus® multicollector-inductively coupled plasma-mass spectrometer (MC-ICP-MS) at LDEO. The instrument was coupled with a desolvation introduction system (an Apex nebulizer). All measured Nd isotopic compositions were corrected for mass fractionation using an exponential law with ¹⁴⁶Nd/¹⁴⁴Nd = 0.7219. For each analytical session, standard JNdi-1 was measured between every sample. For each sample, the measured Nd isotopic composition is normalized to ¹⁴³Nd/¹⁴⁴NdJNdi = 0.512115 (Tanaka et al., 2000), using the average measured JNd sample of a measuring session. JNdi-1 standards yielded external reproducibilities (2σ) as follows: ± 0.30 εNd units for 50 ppb solutions, ± 0.32 for 40 ppb, ± 0.36 for 30 ppb, ± 0.33 for 20 ppb, and ± 0.42 for 10 ppb.","type_id":"883901","type_name":"Multi Collector Inductively Coupled Plasma Mass Spectrometer","type_desc":"A Multi Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) is a type of mass spectrometry where the sample is ionized in a plasma (a partially ionized gas, such as Argon, containing free electrons) that has been generated by electromagnetic induction. A series of collectors is used to detect several ion beams simultaneously.\r\n\r\nA MC-ICPMS is a hybrid mass spectrometer that combines the advantages of an inductively coupled plasma source and the precise measurements of a magnetic sector multicollector mass spectrometer. The primary advantage of the MC-ICPMS is its ability to analyze a broader range of elements, including those with high ionization potential that are difficult to analyze by Thermal Ionization Mass Spectrometry (TIMS). The ICP source also allows flexibility in how samples are introduced to the mass spectrometer and allows the analysis of samples introduced either as an aspirated solution or as an aerosol produced by laser ablation.","type_acronym":"MC-ICPMS"},{"_id":"915666","name":"Niskin bottle","description":"","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"},{"_id":"915668","name":"VG PlasmaQuad ExCell® quadrupole ICP‐MS","description":"The preconcentrated REEs were measured on a VG PlasmaQuad ExCell® quadrupole ICP‐MS, which was coupled to a desolvating introduction system (a CETAC Aridusᵀᴹ) that minimized molecular oxide ion formation with a self‐aspirated Apex ST PFA micro flow nebulizer (ESI). For quality control, the LDEO lab repeatedly analyzes seawater samples from a GEOTRACES intercalibration station Bermuda Atlantic Time Series (BATS; 31.7°N, 64.1°W) in the North Atlantic at 20 m (n = 18) and 2,000 m (n = 16) (Wu et al., 2020). For the BATS 20 and 2,000 m samples, long‐term external reproducibilities (2σ RSD%) range from 1.5% to 6.2%, depending on the element, using a two standard deviation filter on the data (Wu et al., 2020). Those elements showing small errors of","type_id":"842793","type_name":"Quadrupole Mass Spectrometer","type_desc":"A piece of apparatus that consists of an ion source, a mass-to-charge analyser, a detector and a vacuum system and is used to measure mass spectra. The detector is a quadrupole mass-to-charge analyser, which holds the ions in a stable orbit by an electric field generated by four parallel electrodes.\r\n\r\n ","type_acronym":"QMS"}],"parameters":[{"_id":"917325","name":"Station_ID","format":"","frictionlessType":"string","description":"

Station number

","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":"917326","name":"ISO_DateTime_UTC_Start","format":"%Y-%m-%dT%H:%MZ","frictionlessType":"datetime","description":"

Date and time (UTC) at start of sampling event in ISO 8601 format

","units":{"_id":"","name":"unitless"},"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":"917327","name":"Start_Date_UTC","format":"%Y%m%d","frictionlessType":"date","description":"

Date at start of sampling event

","units":{"_id":"","name":"unitless"},"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":"917328","name":"Start_Time_UTC","format":"%H%M","frictionlessType":"time","description":"

Time (UTC) at start of sampling event

","units":{"_id":"","name":"unitless"},"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":"917329","name":"Start_Latitude","format":"","frictionlessType":"number","description":"

Latitude; North is positive.

","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":"917330","name":"Start_Longitude","format":"","frictionlessType":"number","description":"

Longitude; East is positive.

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

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

"}},{"_id":"917331","name":"Event_ID","format":"","frictionlessType":"integer","description":"

GEOTRACES event number

","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":"917332","name":"Sample_ID","format":"","frictionlessType":"integer","description":"

GEOTRACES sample number

","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":"917333","name":"Sample_Depth","format":"","frictionlessType":"integer","description":"

Sampling depth

","units":{"_id":"","name":"meters (m)"},"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":"917334","name":"CTDPRS_T_VALUE_SENSOR_vvdwtp","format":"","frictionlessType":"integer","description":"

Sampling pressure of CTD

","units":{"_id":"","name":"decibars (dbar)"},"type":{"_id":"732","name":"pressure","description":"

water pressure at measurement; depth reported as pressure; positive number increasing with water depth

"}},{"_id":"917335","name":"SD1_CTDPRS_T_VALUE_SENSOR_vvdwtp","format":"","frictionlessType":"number","description":"

Standard deviation of CTDPRS_T_VALUE_SENSOR_vvdwtp

","units":{"_id":"","name":"decibars (dbar)"},"type":{"_id":"732","name":"pressure","description":"

water pressure at measurement; depth reported as pressure; positive number increasing with water depth

"}},{"_id":"917336","name":"Flag_CTDPRS_T_VALUE_SENSOR_vvdwtp","format":"","frictionlessType":"integer","description":"

Quality flag for CTDPRS_T_VALUE_SENSOR_vvdwtp

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"917337","name":"CTDTMP_T_VALUE_SENSOR_fp7gnu","format":"","frictionlessType":"number","description":"

Sampling temperature of CTD

","units":{"_id":"","name":"degrees Celsius"},"type":{"_id":"733","name":"temperature","description":"

water temperature at measurement depth

"}},{"_id":"917338","name":"SD1_CTDTMP_T_VALUE_SENSOR_fp7gnu","format":"","frictionlessType":"number","description":"

Standard deviation of CTDTMP_T_VALUE_SENSOR_fp7gnu

","units":{"_id":"","name":"degrees Celsius"},"type":{"_id":"733","name":"temperature","description":"

water temperature at measurement depth

"}},{"_id":"917339","name":"Flag_CTDTMP_T_VALUE_SENSOR_fp7gnu","format":"","frictionlessType":"integer","description":"

Quality flag for CTDTMP_T_VALUE_SENSOR_fp7gnu

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"917340","name":"CTDSAL_D_CONC_SENSOR_dipxfj","format":"","frictionlessType":"number","description":"

Sampling salinity of CTD

","units":{"_id":"","name":"PSU?"},"type":{"_id":"955","name":"sal","description":"

Salinity: The amount (mass or quantity of matter) of salt per amount (volume or mass) of a body of water.

"}},{"_id":"917341","name":"SD1_CTDSAL_D_CONC_SENSOR_dipxfj","format":"","frictionlessType":"number","description":"

Standard deviation of CTDSAL_D_CONC_SENSOR_dipxfj

","units":{"_id":"","name":"PSU?"},"type":{"_id":"955","name":"sal","description":"

Salinity: The amount (mass or quantity of matter) of salt per amount (volume or mass) of a body of water.

"}},{"_id":"917342","name":"Flag_CTDSAL_D_CONC_SENSOR_dipxfj","format":"","frictionlessType":"integer","description":"

Quality flag for CTDSAL_D_CONC_SENSOR_dipxfj

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"917343","name":"CTDOXY_D_CONC_SENSOR_wpflfa","format":"","frictionlessType":"number","description":"

Sampling oxygen concentration of CTD

","units":{"_id":"","name":"micromoles per kilogram (umol/kg)"},"type":{"_id":"910","name":"dissolved Oxygen","description":"

dissolved oxygen concentration

"}},{"_id":"917344","name":"SD1_CTDOXY_D_CONC_SENSOR_wpflfa","format":"","frictionlessType":"number","description":"

Standard deviation of CTDOXY_D_CONC_SENSOR_wpflfa

","units":{"_id":"","name":"micromoles per kilogram (umol/kg)"},"type":{"_id":"910","name":"dissolved Oxygen","description":"

dissolved oxygen concentration

"}},{"_id":"917345","name":"Flag_CTDOXY_D_CONC_SENSOR_wpflfa","format":"","frictionlessType":"integer","description":"

Quality flag for CTDOXY_D_CONC_SENSOR_wpflfa

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"917346","name":"SILICATE_D_CONC_BOTTLE_7ccpa2","format":"","frictionlessType":"number","description":"

Silicate concentration

","units":{"_id":"","name":"micromoles per kilogram (umol/kg)"},"type":{"_id":"973","name":"SiOH_4","description":"

Silicate (silicic acid, Orthosilicic Acid), Si(OH)4, uM (micromolar) or ug-at Si(OH)4-Si/l (colloquially known as 'silicate')

"}},{"_id":"917347","name":"SD1_SILICATE_D_CONC_BOTTLE_7ccpa2","format":"","frictionlessType":"number","description":"

Standard deviation of SILICATE_D_CONC_BOTTLE_7ccpa2

","units":{"_id":"","name":"micromoles per kilogram (umol/kg)"},"type":{"_id":"973","name":"SiOH_4","description":"

Silicate (silicic acid, Orthosilicic Acid), Si(OH)4, uM (micromolar) or ug-at Si(OH)4-Si/l (colloquially known as 'silicate')

"}},{"_id":"917348","name":"Flag_SILICATE_D_CONC_BOTTLE_7ccpa2","format":"","frictionlessType":"integer","description":"

Quality flag for SILICATE_D_CONC_BOTTLE_7ccpa2

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"917349","name":"PHOSPHATE_D_CONC_BOTTLE_145nsm","format":"","frictionlessType":"number","description":"

Phosphate concentration

","units":{"_id":"","name":"micromoles per kilogram (umol/kg)"},"type":{"_id":"820747","name":"phosphate","description":"

Phosphate (PO43-)

"}},{"_id":"917350","name":"SD1_PHOSPHATE_D_CONC_BOTTLE_145nsm","format":"","frictionlessType":"number","description":"

Standard deviation of PHOSPHATE_D_CONC_BOTTLE_145nsm

","units":{"_id":"","name":"micromoles per kilogram (umol/kg)"},"type":{"_id":"820747","name":"phosphate","description":"

Phosphate (PO43-)

"}},{"_id":"917351","name":"Flag_PHOSPHATE_D_CONC_BOTTLE_145nsm","format":"","frictionlessType":"integer","description":"

Quality flag for PHOSPHATE_D_CONC_BOTTLE_145nsm

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"917352","name":"NITRATE_D_CONC_BOTTLE_oxilrz","format":"","frictionlessType":"number","description":"

Nitrate concentration

","units":{"_id":"","name":"micromoles per kilogram (umol/kg)"},"type":{"_id":"1194","name":"NO3","description":"

Nitrate concentration in the water column

"}},{"_id":"917353","name":"SD1_NITRATE_D_CONC_BOTTLE_oxilrz","format":"","frictionlessType":"number","description":"

Standard deviation of NITRATE_D_CONC_BOTTLE_oxilrz

","units":{"_id":"","name":"micromoles per kilogram (umol/kg)"},"type":{"_id":"1194","name":"NO3","description":"

Nitrate concentration in the water column

"}},{"_id":"917354","name":"Flag_NITRATE_D_CONC_BOTTLE_oxilrz","format":"","frictionlessType":"integer","description":"

Quality flag for NITRATE_D_CONC_BOTTLE_oxilrz

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"917355","name":"Nd_143_144_D_EPSILON_BOTTLE_6yxwln","format":"","frictionlessType":"number","description":"

Dissolved 143Nd/144Nd ratio normalized to 0.512638 in parts per 10000

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

ratio of Neodymium isotopes 143:144.

"}},{"_id":"917356","name":"SD1_Nd_143_144_D_EPSILON_BOTTLE_6yxwln","format":"","frictionlessType":"number","description":"

Standard deviation of Nd_143_144_D_EPSILON_BOTTLE_6yxwln. External 1 standard deviation of repeatedly measured JNdi standards during the analysis normalized to 0.512638 in parts per 10000

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

ratio of Neodymium isotopes 143:144.

"}},{"_id":"917357","name":"Flag_Nd_143_144_D_EPSILON_BOTTLE_6yxwln","format":"","frictionlessType":"integer","description":"

Quality flag for Nd_143_144_D_EPSILON_BOTTLE_6yxwln. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data

","units":{"_id":"","name":"unitless"},"type":{"_id":"1144","name":"q_flag","description":"

quality flag; based on a PI established code; identifies a problem/quality issue with sample(s) from a given water bottle or single observation

"}},{"_id":"917358","name":"La_D_CONC_BOTTLE_3i8t0o","format":"","frictionlessType":"number","description":"

Dissolved Lanthanum (La) concentration

","units":{"_id":"","name":"picomoles per kilogram (pmol/kg)"},"type":{"_id":"646294","name":"trace_element_conc","description":"

Concentration of a trace element in seawater. Does not include trace metals and metaloids. Refer to dataset for element name and units.