http://lod.bco-dmo.org/id/dataset/836121 eng; USA utf8 dataset Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact 2021-01-12 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Dissolved concentrations of Ba, Cd, Cu, Ga, Mn, Ni, and Pb from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 2024-07-16 publication 2024-07-16 revision Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA) 2021-01-14 publication https://doi.org/10.26008/1912/bco-dmo.836121.1 Alan M. Shiller University of Southern Mississippi principalInvestigator Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. publisher Cite this dataset as: Shiller, A. M. (2024) Dissolved concentrations of Ba, Cd, Cu, Ga, Mn, Ni, and Pb from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 3) Version Date 2024-07-16 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.836121.3 [access date] Dissolved concentrations of Ba, Cd, Cu, Ga, Mn, Ni, and Pb from US GEOTRACES GP15-Leg 2 (&quot;PMT&quot;) from the Hawaii to Tahiti along 152 W. Dataset Description: Methods and Sampling: &lt;p&gt;Clean seawater samples were collected using a GEOTRACES CTD referred to as GT-C/12L GoFlo, and also from the Super-GeoFISH towed surface vehicle. For more information, see the cruise report.&lt;/p&gt; &lt;p&gt;Water samples were filtered through pre-cleaned, 0.2 µm Pall Acropak Supor filter capsules as described elsewhere (e.g., Cutter et al., 2014; Hatta et al., 2015). Filtered water was collected in 125 mL HDPE bottles (Nalgene) that had been precleaned by soaking in hot 1.2 M HCl (reagent grade) for at least 8 h with subsequent thorough rinsing with ultrapure distilled deionized water (Barnstead E-pure).&lt;/p&gt; &lt;p&gt;Dissolved Ga was determined by isotope dilution ICP-MS using a ThermoFisher Element XR operated in low resolution. Samples (20-30 mL) were concentrated using a SeaFAST system; a dilute HF rinse was used for column cleaning between samples. An enriched isotope spike of known concentration was prepared using purified enriched 71Ga (99.8%), obtained from Oak Ridge National Laboratories. The substantial sample pre-concentration of this method allows for ICP-MS analysis using medium resolution which eliminates isobaric interferences including doubly charged 138Ba with 69Ga.&lt;/p&gt; &lt;p&gt;The reagent blank contribution to the dissolved Ga analysis is typically 0.6 pmol/kg and the detection limit (based on 3 times the standard deviation of the blank) is 0.3 pmol/kg. Repeated runs of US GEOTRACES intercalibration samples (GS and GD), in-house reference solutions, and cast overlap samples suggest a precision of ± 4%; the limit of detection for Ga was 1.5 pmol/kg. Recovery of the method, as determined by repeated analysis of a spiked and unspiked seawater sample was 100 ± 7%. See Table 1 Supplemental File for data.&lt;/p&gt; &lt;p&gt;Dissolved Ba was measured using a ThermoFisher Element XR Inductively Coupled Plasma Mass Spectrometer (ICP-MS) and the isotope dilution method as described by Jacquet et al. (2005). Aliquots (50 μL) of each sample were spiked with 25 μL of a 135Ba-enriched solution (~170 nM) and then diluted 30-fold with 0.2 μm ultrapure filtered water. A sample of ~93% enriched 135Ba was obtained from Oak Ridge National Laboratories for use as the enriched isotope spike. The ICP-MS was operated in low resolution and both 135Ba and 138Ba were determined. The samples were bracketed every 10 samples with a blank and the spike 135Ba solution. The volumes of the spikes, samples and dilution water were accurately assessed by calibrating each pipette by weight. The reproducibility error of this method was estimated by comparing samples collected at the same depths on different casts at the same station. For 12 pairs of these replicate samples, the average absolute deviation of 0.7 nmol/kg or typically 1.5%. Repeated runs of runs of US GEOTRACES intercalibration samples and in-house reference solutions suggest a similar precision; the limit of detection for barium was 0.7 nmol/kg. Our precision is similar to that reported by other labs for Ba (e.g., Jacquet et al., 2005). See Table 1 Supplemental File for data.&lt;/p&gt; &lt;p&gt;Dissolved Ni, Cu, Cd, Pb, and Mn were determined using 14 mL of sample that was spiked with a mixture of isotopically-enriched Ni-62, Cu-65, Cd-111, and Pb-207 (Oak Ridge Nat’l. Labs). Each spike was &amp;gt;90% enriched in the listed isotopes. The sample/spike ratio was chosen so as to have the analytical isotope ratios approximately the geometric mean of the natural and enriched spike isotope ratios. Samples were then extracted/pre-concentrated using a SeaFAST system (Elemental Scientific, Inc.) operated in offline mode. A 10-mL sample loop was employed and the elution volume was 750 µL. A similar online SeaFAST extraction procedure is described by Hathorne et al. (2012) for rare earth elements. The extracted samples were subsequently analyzed using a Thermo-Fisher high resolution ICP-MS with an Apex-FAST high efficiency sample introduction system with Spiro desolvator (Elemental Scientific, Inc.). All elements were determined in medium resolution, except Cd which was determined in low resolution. For Mn-55, the Ni and Cu spikes served as internal standards. Calibration was checked by analysis of a large-volume composite North Atlantic surface seawater sample. Spiked (with a natural isotopic abundance elemental spike) and unspiked aliquots of this sample were analyzed twice in each analytical run. Mo-98 was monitored to correct for MoO+ interference on Cd isotopes.&lt;/p&gt; &lt;p&gt;Dissolved Nd was determined in a separate seaFAST extraction, but with essentially the same methodology as the transition metals. The samples were spiked with isotopically-enriched Nd-145. Nd was determined in low resolution. See related dataset &quot;GP15 Dissolved Rare Earth Elements Leg 2&quot; (&lt;a href=&quot;https://www.bco-dmo.org/dataset/932559&quot; target=&quot;_blank&quot;&gt;https://www.bco-dmo.org/dataset/932559&lt;/a&gt;) for the Nd data.&lt;/p&gt; &lt;p&gt;The reproducibility error of this method was estimated by comparing samples collected at the same depths on different casts at the same station as well as by repeated measurement of GEOTRACES reference waters and an in-house standard. Recovery of the method was determined by repeated analysis of a spiked and unspiked seawater. The recoveries, precisions, and comparisons to reference waters are shown in Table 1 Supplemental File for the dissolved concentration data.&lt;/p&gt; Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1737024 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1737024 completed Alan M. Shiller University of Southern Mississippi 985-640-4580 USA shilleram@gmail.com pointOfContact asNeeded Dataset Version: 3 Unknown Station_ID Start_Date_UTC Start_Time_UTC Start_ISO_DateTime_UTC End_Date_UTC End_Time_UTC End_ISO_DateTime_UTC Start_Latitude Start_Longitude End_Latitude End_Longitude Event_ID Sample_ID Sample_Depth CTD_Pressure Ba_D_CONC_BOTTLE_6yrfu2 SD1_Ba_D_CONC_BOTTLE_6yrfu2 Flag_Ba_D_CONC_BOTTLE_6yrfu2 Ba_D_CONC_FISH_zlfwni SD1_Ba_D_CONC_FISH_zlfwni Flag_Ba_D_CONC_FISH_zlfwni Cd_D_CONC_BOTTLE_s0muvq SD1_Cd_D_CONC_BOTTLE_s0muvq Flag_Cd_D_CONC_BOTTLE_s0muvq Cd_D_CONC_FISH_awbbbh SD1_Cd_D_CONC_FISH_awbbbh Flag_Cd_D_CONC_FISH_awbbbh Cu_D_CONC_BOTTLE_alzeie SD1_Cu_D_CONC_BOTTLE_alzeie Flag_Cu_D_CONC_BOTTLE_alzeie Cu_D_CONC_FISH_72yszy SD1_Cu_D_CONC_FISH_72yszy Flag_Cu_D_CONC_FISH_72yszy Ga_D_CONC_BOTTLE_espyox SD1_Ga_D_CONC_BOTTLE_espyox Flag_Ga_D_CONC_BOTTLE_espyox Ga_D_CONC_FISH_qnl1vy SD1_Ga_D_CONC_FISH_qnl1vy Flag_Ga_D_CONC_FISH_qnl1vy Mn_D_CONC_BOTTLE_yfft8e SD1_Mn_D_CONC_BOTTLE_yfft8e Flag_Mn_D_CONC_BOTTLE_yfft8e Mn_D_CONC_FISH_7t7piy SD1_Mn_D_CONC_FISH_7t7piy Flag_Mn_D_CONC_FISH_7t7piy Ni_D_CONC_BOTTLE_5povae SD1_Ni_D_CONC_BOTTLE_5povae Flag_Ni_D_CONC_BOTTLE_5povae Ni_D_CONC_FISH_msku5f SD1_Ni_D_CONC_FISH_msku5f Flag_Ni_D_CONC_FISH_msku5f Pb_D_CONC_BOTTLE_wtrjdq SD1_Pb_D_CONC_BOTTLE_wtrjdq Flag_Pb_D_CONC_BOTTLE_wtrjdq Pb_D_CONC_FISH_yujrae SD1_Pb_D_CONC_FISH_yujrae Flag_Pb_D_CONC_FISH_yujrae Super-GeoFISH towed surface vehicle 12L GoFlo ThermoFisher Element XR SeaFAST system theme None, User defined station date time of day ISO_DateTime_UTC latitude longitude event sample identification depth water pressure Barium quality flag Cadmium Copper Gallium Manganese Nickel Lead featureType BCO-DMO Standard Parameters GeoFish Towed near-Surface Sampler GO-FLO Bottle Inductively Coupled Plasma Mass Spectrometer SeaFAST Automated Preconcentration System instrument BCO-DMO Standard Instruments RR1815 service Deployment Activity Hilo, HI to Papeete, French Polynesia place Locations otherRestrictions otherRestrictions Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use. U.S. GEOTRACES http://www.geotraces.org/ U.S. GEOTRACES GEOTRACES is a SCOR sponsored program; and funding for program infrastructure development is provided by the U.S. National Science Foundation. GEOTRACES gained momentum following a special symposium, S02: Biogeochemical cycling of trace elements and isotopes in the ocean and applications to constrain contemporary marine processes (GEOSECS II), at a 2003 Goldschmidt meeting convened in Japan. The GEOSECS II acronym referred to the Geochemical Ocean Section Studies To determine full water column distributions of selected trace elements and isotopes, including their concentration, chemical speciation, and physical form, along a sufficient number of sections in each ocean basin to establish the principal relationships between these distributions and with more traditional hydrographic parameters; * To evaluate the sources, sinks, and internal cycling of these species and thereby characterize more completely the physical, chemical and biological processes regulating their distributions, and the sensitivity of these processes to global change; and * To understand the processes that control the concentrations of geochemical species used for proxies of the past environment, both in the water column and in the substrates that reflect the water column. GEOTRACES will be global in scope, consisting of ocean sections complemented by regional process studies. Sections and process studies will combine fieldwork, laboratory experiments and modelling. Beyond realizing the scientific objectives identified above, a natural outcome of this work will be to build a community of marine scientists who understand the processes regulating trace element cycles sufficiently well to exploit this knowledge reliably in future interdisciplinary studies. Expand "Projects" below for information about and data resulting from individual US GEOTRACES research projects. U.S. GEOTRACES largerWorkCitation program US GEOTRACES Pacific Meridional Transect (GP15) http://www.geotraces.org/ US GEOTRACES Pacific Meridional Transect (GP15) <p>A 60-day research cruise took place in 2018 along a transect form Alaska to Tahiti at 152° W. A description of the project titled "<em>Collaborative Research: Management and implementation of the US GEOTRACES Pacific Meridional Transect</em>", funded by NSF, is below. Further project information is available on the <a href="https://www.geotraces.org/" target="_blank">US GEOTRACES website</a> and on the <a href="https://geotraces-gp15.com/" target="_blank">cruise blog</a>. A detailed <a href="https://datadocs.bco-dmo.org/docs/geotraces/GEOTRACES_PMT/casciotti/data_docs/GP15_Cruise_Report_with_ODF_Report.pdf" target="_blank">cruise report is also available</a> as a PDF.</p> <p><em>Description from NSF award abstract:</em><br /> GEOTRACES is a global effort in the field of Chemical Oceanography in which the United States plays a major role. The goal of the GEOTRACES program is to understand the distributions of many elements and their isotopes in the ocean. Until quite recently, these elements could not be measured at a global scale. Understanding the distributions of these elements and isotopes will increase the understanding of processes that shape their distributions and also the processes that depend on these elements. For example, many "trace elements" (elements that are present in very low amounts) are also important for life, and their presence or absence can play a vital role in the population of marine ecosystems. This project will launch the next major U.S. GEOTRACES expedition in the Pacific Ocean between Alaska and Tahiti. The award made here would support all of the major infrastructure for this expedition, including the research vessel, the sampling equipment, and some of the core oceanographic measurements. This project will also support the personnel needed to lead the expedition and collect the samples.</p> <p>This project would support the essential sampling operations and infrastructure for the U.S. GEOTRACES Pacific Meridional Transect along 152° W to support a large variety of individual science projects on trace element and isotope (TEI) biogeochemistry that will follow. Thus, the major objectives of this management proposal are: (1) plan and coordinate a 60 day research cruise in 2018; (2) obtain representative samples for a wide variety of TEIs using a conventional CTD/rosette, GEOTRACES Trace Element Sampling Systems, and in situ pumps; (3) acquire conventional CTD hydrographic data along with discrete samples for salinity, dissolved oxygen, algal pigments, 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 data to the GEOTRACES Data Assembly Centre (via the US BCO-DMO data center); and (6) coordinate all cruise communications between investigators, including preparation of a hydrographic report/publication. This project would also provide baseline measurements of TEIs in the Clarion-Clipperton fracture zone (~7.5°N-17°N, ~155°W-115°W) where large-scale deep sea mining is planned. Environmental impact assessments are underway in partnership with the mining industry, but the effect of mining activities on TEIs in the water column is one that could be uniquely assessed by the GEOTRACES community. In support of efforts to communicate the science to a wide audience the investigators will recruit an early career freelance science journalist with interests in marine science and oceanography to participate on the cruise and do public outreach, photography and/or videography, and social media from the ship, as well as to submit articles about the research to national media. The project would also support several graduate students.</p> U.S. GEOTRACES PMT largerWorkCitation project US GEOTRACES PMT: Rare earth elements, gallium, barium, and methane as indicators of internal cycling and input processes https://osprey.bco-dmo.org/project/833925 US GEOTRACES PMT: Rare earth elements, gallium, barium, and methane as indicators of internal cycling and input processes <p><em>NSF Award Abstract:</em><br /> This project involves participation in an oceanographic research cruise scheduled for mid-2018 and going from Tahiti to Alaska along 152° W in the Pacific Ocean. This cruise transect will allow for sampling of ocean waters in a wide variety of environments. These environments include the Aleutian margin (where there is significant input of continental materials), the subarctic North Pacific (where plant productivity may be limited by iron availability), deep waters of the North Pacific (which are the oldest deep waters of the ocean), as well as oxygen minimum zones, hydrothermal plumes, and equatorial waters subject to upwelling. The investigators will determine dissolved concentrations of barium (Ba), gallium (Ga), rare earth elements (REEs), and methane. These studies are pertinent to important oceanic issues including delivery of mineral dust and nutrient iron to the surface ocean (Ga), removal and internal cycling of trace elements (Ba, REEs), development of tracers of past ocean processes (Ba), and tracing sources of material (Ga, Ba, REEs, methane) including margin sources (Ba, REEs, methane). Other researchers involved in the cruise will determine additional elements and isotopes including iron (Fe), aluminum (Al), and radium isotopes (Ra). Comparing these chemical distributions is key for all of the involved research groups to test hypothesized mechanisms of element input, removal, and cycling through the ocean. These mechanisms, in turn, are pertinent to understanding the ocean's biological productivity and its role in global climate. The knowledge and experience gained from this project will be incorporated into the principle investigator's courses in oceanography. A graduate student will also be supported and trained as part of this project.</p> <p>A researcher from the University of Southern Mississippi will participate in the 2018 US GEOTRACES Pacific Meridional Transect (PMT) going from Tahiti to the Aleutians along 152° W. During the cruise, samples will be collected from regions exhibiting strong margin fluxes, the subarctic HNLC waters, the oldest deep water in the world's oceans, the distal ends of hydrothermal plumes from the Juan de Fuca Ridge and East Pacific Rise as well as oxygen minimum zones, equatorial upwelling, and some of the most oligotrophic waters in the world's oceans in the South Pacific gyre at 20°S. The samples will be analyzed for dissolved gallium (Ga), barium (Ba), rare earth elements (REEs) along with dissolved methane. These studies are pertinent to important issues including delivery of mineral dust and nutrient iron to the surface ocean (Ga), removal and internal cycling of trace elements (Ba, REEs), development of paleoceanographic tracers (Ba), tracing sources of material (Ga, Ba, REEs, methane) including margin sources (Ba, REEs, methane), and understanding of conservative vs non-conservative changes in tracer distributions (Ba, REEs). Overall, the gradients in dust delivery, productivity, age of deep waters, and extent of oxygen minimum zones in the PMT provide opportunities to compare how trace element distributions are affected by these gradients and hence inform the interpretation of the distributions. The PMT will also provide the opportunity to examine evolution of chemical signals in deep and bottom waters in a basin with fewer water masses and a longer timescale of basin mixing than the Atlantic. As such, this data may provide an opportunity to tease apart conservative mixing from non-conservative biogeochemistry and will include using water mass deconvolution to estimate the conservative component of trace element distributions, element-AOU plots, and distributions of the deviations from global element-nutrient correlations. The cruise also allows extensive collaboration with other investigators. Thus, the dissolved Ga data will be compared with data obtained by colleagues on distributions of other lithogenic, rapidly-scavenged elements like aluminum (Al) and thorium-232; the dissolved Ba data will be shared with those determining radium and Ba isotopes; and, the REE data will be made available to those examining neodymium (Nd) isotopes as well as compared with other scavenging tracers such as scandium (Sc). Comparing our chemical distributions with those determined by others is key for all of the involved research groups to test hypothesized mechanisms of element input, removal, and cycling through the ocean. These mechanisms, in turn, are pertinent to understanding the ocean's biological productivity and its role in global climate.</p> PMT REEs Ga Ba CH4 largerWorkCitation project eng; USA oceans Hilo, HI to Papeete, French Polynesia -155.258 -151.99 -20 18.906 2018-10-25 2018-11-22 From projects that focused on the following 2 locations: 1. Pacific Meridional Transect along 152W (GP15) 2. Pacific Ocean from Aleutians to Tahiti along 152 W 0 BCO-DMO catalogue of parameters from Dissolved concentrations of Ba, Cd, Cu, Ga, Mn, Ni, and Pb from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact http://lod.bco-dmo.org/id/dataset-parameter/836237.rdf Name: Station_ID Units: unitless Description: <p>Station number</p> http://lod.bco-dmo.org/id/dataset-parameter/836238.rdf Name: Start_Date_UTC Units: unitless Description: <p>Date (UTC) at start of sample collection; format: DD/MM/YYYY</p> http://lod.bco-dmo.org/id/dataset-parameter/836239.rdf Name: Start_Time_UTC Units: unitless Description: <p>Time (UTC) at start of sample collection; format: hhmm</p> http://lod.bco-dmo.org/id/dataset-parameter/836240.rdf Name: Start_ISO_DateTime_UTC Units: unitless Description: <p>Date and time (UTC) at start of sample collection; formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ</p> http://lod.bco-dmo.org/id/dataset-parameter/836241.rdf Name: End_Date_UTC Units: unitless Description: <p>Date (UTC) at end of sample collection; format: DD/MM/YYYY</p> http://lod.bco-dmo.org/id/dataset-parameter/836242.rdf Name: End_Time_UTC Units: unitless Description: <p>Time (UTC) at end of sample collection; format: hhmm</p> http://lod.bco-dmo.org/id/dataset-parameter/836243.rdf Name: End_ISO_DateTime_UTC Units: unitless Description: <p>Date and time (UTC) at end of sample collection; formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ</p> http://lod.bco-dmo.org/id/dataset-parameter/836244.rdf Name: Start_Latitude Units: degrees North Description: <p>Latitude at start of sample collection</p> http://lod.bco-dmo.org/id/dataset-parameter/836245.rdf Name: Start_Longitude Units: degrees East Description: <p>Longitude at start of sample collection</p> http://lod.bco-dmo.org/id/dataset-parameter/836246.rdf Name: End_Latitude Units: degrees North Description: <p>Latitude at end of sample collection</p> http://lod.bco-dmo.org/id/dataset-parameter/836247.rdf Name: End_Longitude Units: degrees East Description: <p>Longitude at end of sample collection</p> http://lod.bco-dmo.org/id/dataset-parameter/836248.rdf Name: Event_ID Units: unitless Description: <p>Event number</p> http://lod.bco-dmo.org/id/dataset-parameter/836249.rdf Name: Sample_ID Units: unitless Description: <p>GEOTRACES sample number</p> http://lod.bco-dmo.org/id/dataset-parameter/836250.rdf Name: Sample_Depth Units: meters (m) Description: <p>Sample depth</p> http://lod.bco-dmo.org/id/dataset-parameter/836251.rdf Name: CTD_Pressure Units: decibars (dbar) Description: <p>CTD pressure</p> http://lod.bco-dmo.org/id/dataset-parameter/836252.rdf Name: Ba_D_CONC_BOTTLE_6yrfu2 Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved barium concentration from bottle samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836253.rdf Name: SD1_Ba_D_CONC_BOTTLE_6yrfu2 Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Ba_D_CONC_BOTTLE_6yrfu2</p> http://lod.bco-dmo.org/id/dataset-parameter/836254.rdf Name: Flag_Ba_D_CONC_BOTTLE_6yrfu2 Units: unitless Description: <p>SeaDataNet quality flag for Ba_D_CONC_BOTTLE_6yrfu2</p> http://lod.bco-dmo.org/id/dataset-parameter/836255.rdf Name: Ba_D_CONC_FISH_zlfwni Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved barium concentration from towed GeoFISH samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836256.rdf Name: SD1_Ba_D_CONC_FISH_zlfwni Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Ba_D_CONC_FISH_zlfwni</p> http://lod.bco-dmo.org/id/dataset-parameter/836257.rdf Name: Flag_Ba_D_CONC_FISH_zlfwni Units: unitless Description: <p>SeaDataNet quality flag for Ba_D_CONC_FISH_zlfwni</p> http://lod.bco-dmo.org/id/dataset-parameter/836258.rdf Name: Cd_D_CONC_BOTTLE_s0muvq Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved cadmium from bottle samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836259.rdf Name: SD1_Cd_D_CONC_BOTTLE_s0muvq Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Cd_D_CONC_BOTTLE_s0muvq</p> http://lod.bco-dmo.org/id/dataset-parameter/836260.rdf Name: Flag_Cd_D_CONC_BOTTLE_s0muvq Units: unitless Description: <p>SeaDataNet quality flag for Cd_D_CONC_BOTTLE_s0muvq</p> http://lod.bco-dmo.org/id/dataset-parameter/836261.rdf Name: Cd_D_CONC_FISH_awbbbh Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved cadmium from towed GeoFISH samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836262.rdf Name: SD1_Cd_D_CONC_FISH_awbbbh Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Cd_D_CONC_FISH_awbbbh</p> http://lod.bco-dmo.org/id/dataset-parameter/836263.rdf Name: Flag_Cd_D_CONC_FISH_awbbbh Units: unitless Description: <p>SeaDataNet quality flag for Cd_D_CONC_FISH_awbbbh</p> http://lod.bco-dmo.org/id/dataset-parameter/836264.rdf Name: Cu_D_CONC_BOTTLE_alzeie Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved copper from bottle samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836265.rdf Name: SD1_Cu_D_CONC_BOTTLE_alzeie Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Cu_D_CONC_BOTTLE_alzeie</p> http://lod.bco-dmo.org/id/dataset-parameter/836266.rdf Name: Flag_Cu_D_CONC_BOTTLE_alzeie Units: unitless Description: <p>SeaDataNet quality flag for Cu_D_CONC_BOTTLE_alzeie</p> http://lod.bco-dmo.org/id/dataset-parameter/836267.rdf Name: Cu_D_CONC_FISH_72yszy Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved copper from towed GeoFISH samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836268.rdf Name: SD1_Cu_D_CONC_FISH_72yszy Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Cu_D_CONC_FISH_72yszy</p> http://lod.bco-dmo.org/id/dataset-parameter/836269.rdf Name: Flag_Cu_D_CONC_FISH_72yszy Units: unitless Description: <p>SeaDataNet quality flag for Cu_D_CONC_FISH_72yszy</p> http://lod.bco-dmo.org/id/dataset-parameter/836270.rdf Name: Ga_D_CONC_BOTTLE_espyox Units: picomoles per kilogram (pmol/kg) Description: <p>Dissolved gallium from bottle samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836271.rdf Name: SD1_Ga_D_CONC_BOTTLE_espyox Units: picomoles per kilogram (pmol/kg) Description: <p>One standard deviation of Ga_D_CONC_BOTTLE_espyox</p> http://lod.bco-dmo.org/id/dataset-parameter/836272.rdf Name: Flag_Ga_D_CONC_BOTTLE_espyox Units: unitless Description: <p>SeaDataNet quality flag for Ga_D_CONC_BOTTLE_espyox</p> http://lod.bco-dmo.org/id/dataset-parameter/836273.rdf Name: Ga_D_CONC_FISH_qnl1vy Units: picomoles per kilogram (pmol/kg) Description: <p>Dissolved gallium from towed GeoFISH samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836274.rdf Name: SD1_Ga_D_CONC_FISH_qnl1vy Units: picomoles per kilogram (pmol/kg) Description: <p>One standard deviation of Ga_D_CONC_FISH_qnl1vy</p> http://lod.bco-dmo.org/id/dataset-parameter/836275.rdf Name: Flag_Ga_D_CONC_FISH_qnl1vy Units: unitless Description: <p>SeaDataNet quality flag for Ga_D_CONC_FISH_qnl1vy</p> http://lod.bco-dmo.org/id/dataset-parameter/836276.rdf Name: Mn_D_CONC_BOTTLE_yfft8e Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved manganese from bottle samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836277.rdf Name: SD1_Mn_D_CONC_BOTTLE_yfft8e Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Mn_D_CONC_BOTTLE_yfft8e</p> http://lod.bco-dmo.org/id/dataset-parameter/836278.rdf Name: Flag_Mn_D_CONC_BOTTLE_yfft8e Units: unitless Description: <p>SeaDataNet quality flag for Mn_D_CONC_BOTTLE_yfft8e</p> http://lod.bco-dmo.org/id/dataset-parameter/836279.rdf Name: Mn_D_CONC_FISH_7t7piy Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved manganese from towed GeoFISH samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836280.rdf Name: SD1_Mn_D_CONC_FISH_7t7piy Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Mn_D_CONC_FISH_7t7piy</p> http://lod.bco-dmo.org/id/dataset-parameter/836281.rdf Name: Flag_Mn_D_CONC_FISH_7t7piy Units: unitless Description: <p>SeaDataNet quality flag for Mn_D_CONC_FISH_7t7piy</p> http://lod.bco-dmo.org/id/dataset-parameter/836288.rdf Name: Ni_D_CONC_BOTTLE_5povae Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved nickel from bottle samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836289.rdf Name: SD1_Ni_D_CONC_BOTTLE_5povae Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Ni_D_CONC_BOTTLE_5povae</p> http://lod.bco-dmo.org/id/dataset-parameter/836290.rdf Name: Flag_Ni_D_CONC_BOTTLE_5povae Units: unitless Description: <p>SeaDataNet quality flag for Ni_D_CONC_BOTTLE_5povae</p> http://lod.bco-dmo.org/id/dataset-parameter/836291.rdf Name: Ni_D_CONC_FISH_msku5f Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved nickel from towed GeoFISH samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836292.rdf Name: SD1_Ni_D_CONC_FISH_msku5f Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Ni_D_CONC_FISH_msku5f</p> http://lod.bco-dmo.org/id/dataset-parameter/836293.rdf Name: Flag_Ni_D_CONC_FISH_msku5f Units: unitless Description: <p>SeaDataNet quality flag for Ni_D_CONC_FISH_msku5f</p> http://lod.bco-dmo.org/id/dataset-parameter/836444.rdf Name: Pb_D_CONC_BOTTLE_wtrjdq Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved lead from bottle samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836445.rdf Name: SD1_Pb_D_CONC_BOTTLE_wtrjdq Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Pb_D_CONC_BOTTLE_wtrjdq</p> http://lod.bco-dmo.org/id/dataset-parameter/836446.rdf Name: Flag_Pb_D_CONC_BOTTLE_wtrjdq Units: unitless Description: <p>SeaDataNet quality flag for Pb_D_CONC_BOTTLE_wtrjdq</p> http://lod.bco-dmo.org/id/dataset-parameter/836447.rdf Name: Pb_D_CONC_FISH_yujrae Units: nanomoles per kilogram (nmol/kg) Description: <p>Dissolved lead from towed GeoFISH samples</p> http://lod.bco-dmo.org/id/dataset-parameter/836448.rdf Name: SD1_Pb_D_CONC_FISH_yujrae Units: nanomoles per kilogram (nmol/kg) Description: <p>One standard deviation of Pb_D_CONC_FISH_yujrae</p> http://lod.bco-dmo.org/id/dataset-parameter/836449.rdf Name: Flag_Pb_D_CONC_FISH_yujrae Units: unitless Description: <p>SeaDataNet quality flag for Pb_D_CONC_FISH_yujrae</p> GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact 73878 https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/1acfd285-01fd-44de-a899-0c28a279a863/content download 115677 https://darchive.mblwhoilibrary.org/bitstream/1912/27105/1/dataset-836121_gp15-dissolved-ba-cd-cu-ga-mn-nd-ni-and-pb-leg-2__v2.tsv download 115677 https://darchive.mblwhoilibrary.org/bitstream/1912/26583/1/dataset-836121_gp15-dissolved-ba-cd-cu-ga-mn-nd-ni-and-pb-leg-2__v1.tsv download https://doi.org/10.26008/1912/bco-dmo.836121.1 download onLine dataset &lt;p&gt;Clean seawater samples were collected using a GEOTRACES CTD referred to as GT-C/12L GoFlo, and also from the Super-GeoFISH towed surface vehicle. For more information, see the cruise report.&lt;/p&gt; &lt;p&gt;Water samples were filtered through pre-cleaned, 0.2 µm Pall Acropak Supor filter capsules as described elsewhere (e.g., Cutter et al., 2014; Hatta et al., 2015). Filtered water was collected in 125 mL HDPE bottles (Nalgene) that had been precleaned by soaking in hot 1.2 M HCl (reagent grade) for at least 8 h with subsequent thorough rinsing with ultrapure distilled deionized water (Barnstead E-pure).&lt;/p&gt; &lt;p&gt;Dissolved Ga was determined by isotope dilution ICP-MS using a ThermoFisher Element XR operated in low resolution. Samples (20-30 mL) were concentrated using a SeaFAST system; a dilute HF rinse was used for column cleaning between samples. An enriched isotope spike of known concentration was prepared using purified enriched 71Ga (99.8%), obtained from Oak Ridge National Laboratories. The substantial sample pre-concentration of this method allows for ICP-MS analysis using medium resolution which eliminates isobaric interferences including doubly charged 138Ba with 69Ga.&lt;/p&gt; &lt;p&gt;The reagent blank contribution to the dissolved Ga analysis is typically 0.6 pmol/kg and the detection limit (based on 3 times the standard deviation of the blank) is 0.3 pmol/kg. Repeated runs of US GEOTRACES intercalibration samples (GS and GD), in-house reference solutions, and cast overlap samples suggest a precision of ± 4%; the limit of detection for Ga was 1.5 pmol/kg. Recovery of the method, as determined by repeated analysis of a spiked and unspiked seawater sample was 100 ± 7%. See Table 1 Supplemental File for data.&lt;/p&gt; &lt;p&gt;Dissolved Ba was measured using a ThermoFisher Element XR Inductively Coupled Plasma Mass Spectrometer (ICP-MS) and the isotope dilution method as described by Jacquet et al. (2005). Aliquots (50 μL) of each sample were spiked with 25 μL of a 135Ba-enriched solution (~170 nM) and then diluted 30-fold with 0.2 μm ultrapure filtered water. A sample of ~93% enriched 135Ba was obtained from Oak Ridge National Laboratories for use as the enriched isotope spike. The ICP-MS was operated in low resolution and both 135Ba and 138Ba were determined. The samples were bracketed every 10 samples with a blank and the spike 135Ba solution. The volumes of the spikes, samples and dilution water were accurately assessed by calibrating each pipette by weight. The reproducibility error of this method was estimated by comparing samples collected at the same depths on different casts at the same station. For 12 pairs of these replicate samples, the average absolute deviation of 0.7 nmol/kg or typically 1.5%. Repeated runs of runs of US GEOTRACES intercalibration samples and in-house reference solutions suggest a similar precision; the limit of detection for barium was 0.7 nmol/kg. Our precision is similar to that reported by other labs for Ba (e.g., Jacquet et al., 2005). See Table 1 Supplemental File for data.&lt;/p&gt; &lt;p&gt;Dissolved Ni, Cu, Cd, Pb, and Mn were determined using 14 mL of sample that was spiked with a mixture of isotopically-enriched Ni-62, Cu-65, Cd-111, and Pb-207 (Oak Ridge Nat’l. Labs). Each spike was &amp;gt;90% enriched in the listed isotopes. The sample/spike ratio was chosen so as to have the analytical isotope ratios approximately the geometric mean of the natural and enriched spike isotope ratios. Samples were then extracted/pre-concentrated using a SeaFAST system (Elemental Scientific, Inc.) operated in offline mode. A 10-mL sample loop was employed and the elution volume was 750 µL. A similar online SeaFAST extraction procedure is described by Hathorne et al. (2012) for rare earth elements. The extracted samples were subsequently analyzed using a Thermo-Fisher high resolution ICP-MS with an Apex-FAST high efficiency sample introduction system with Spiro desolvator (Elemental Scientific, Inc.). All elements were determined in medium resolution, except Cd which was determined in low resolution. For Mn-55, the Ni and Cu spikes served as internal standards. Calibration was checked by analysis of a large-volume composite North Atlantic surface seawater sample. Spiked (with a natural isotopic abundance elemental spike) and unspiked aliquots of this sample were analyzed twice in each analytical run. Mo-98 was monitored to correct for MoO+ interference on Cd isotopes.&lt;/p&gt; &lt;p&gt;Dissolved Nd was determined in a separate seaFAST extraction, but with essentially the same methodology as the transition metals. The samples were spiked with isotopically-enriched Nd-145. Nd was determined in low resolution. See related dataset &quot;GP15 Dissolved Rare Earth Elements Leg 2&quot; (&lt;a href=&quot;https://www.bco-dmo.org/dataset/932559&quot; target=&quot;_blank&quot;&gt;https://www.bco-dmo.org/dataset/932559&lt;/a&gt;) for the Nd data.&lt;/p&gt; &lt;p&gt;The reproducibility error of this method was estimated by comparing samples collected at the same depths on different casts at the same station as well as by repeated measurement of GEOTRACES reference waters and an in-house standard. Recovery of the method was determined by repeated analysis of a spiked and unspiked seawater. The recoveries, precisions, and comparisons to reference waters are shown in Table 1 Supplemental File for the dissolved concentration data.&lt;/p&gt; Specified by the Principal Investigator(s) Version 1 (date: 2021-01-14) - renamed fields; - added date/time fields in ISO8601 format; - replaced all missing data values with 'nd'. Version 2 (date: 2021-05-12): - retained same steps as above; - replaced Event_ID &quot;7012&quot; with &quot;7011&quot; (for samples 15720-15742). Version 3 (date: 2024-07-16): - retained same steps as above; - removed the following Nd columns because Nd has been published in BCO-DMO dataset ID 932559: Nd_D_CONC_BOTTLE_4vjjtn, SD1_Nd_D_CONC_BOTTLE_4vjjtn, Flag_Nd_D_CONC_BOTTLE_4vjjtn Nd_D_CONC_FISH_ea16lv, SD1_Nd_D_CONC_FISH_ea16lv, Flag_Nd_D_CONC_FISH_ea16lv - saved the final file as &quot;836121_v3_gp15_diss_ba_cd_cu_ga_mn_ni_pb_leg2.csv&quot;. Specified by BCO-DMO Data Managers asNeeded 7.x-1.1 Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact Super-GeoFISH towed surface vehicle Super-GeoFISH towed surface vehicle PI Supplied Instrument Name: Super-GeoFISH towed surface vehicle Instrument Name: GeoFish Towed near-Surface Sampler Instrument Short Name:GeoFish Instrument Description: 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). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/31/ 12L GoFlo 12L GoFlo PI Supplied Instrument Name: 12L GoFlo Instrument Name: GO-FLO Bottle Instrument Short Name:GO-FLO Instrument Description: GO-FLO bottle cast used to collect water samples for pigment, nutrient, plankton, etc. The GO-FLO sampling bottle is specially designed to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/30/ ThermoFisher Element XR ThermoFisher Element XR PI Supplied Instrument Name: ThermoFisher Element XR PI Supplied Instrument Description:High resolution inductively coupled plasma mass spectrometer, Element XR, ThermoFisher Instrument Name: Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:ICP Mass Spec Instrument Description: An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ SeaFAST system SeaFAST system PI Supplied Instrument Name: SeaFAST system PI Supplied Instrument Description:Automated Preconcentration System for Undiluted Seawater, seaFAST, Elemental Scientific. Instrument Name: SeaFAST Automated Preconcentration System Instrument Short Name: Instrument Description: The seaFAST is an automated sample introduction system for analysis of seawater and other high matrix samples for analyses by ICPMS (Inductively Coupled Plasma Mass Spectrometry). Cruise: RR1815 RR1815 R/V Roger Revelle Community Standard Description International Council for the Exploration of the Sea R/V Roger Revelle vessel RR1815 Gregory A. Cutter Old Dominion University https://datadocs.bco-dmo.org/docs/geotraces/GEOTRACES_PMT/casciotti/data_docs/GP15_Cruise_Report_with_ODF_Report.pdf Report describing RR1815 R/V Roger Revelle Community Standard Description International Council for the Exploration of the Sea R/V Roger Revelle vessel