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:Tca6,Description from NSF award abstract: In pursuit of its goal "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", in 2015 the International GEOTRACES Program will embark on several years of research in the Arctic Ocean. In a region where climate warming and general environmental change are occurring at amazing speed, research such as this is important for understanding the current state of Arctic Ocean geochemistry and for developing predictive capability as the regional ecosystem continues to warm and influence global oceanic and climatic conditions. The three investigators funded on this award, will manage a large team of U.S.scientists who will compete through the regular NSF proposal process to contribute their own unique expertise in marine trace metal, isotopic, and carbon cycle geochemistry to the U.S. effort. The three managers will be responsible for arranging and overseeing at-sea technical services such as hydrographic measurements, nutrient analyses, and around-the-clock management of on-deck sampling activites upon which all participants depend, and for organizing all pre- and post-cruise technical support and scientific meetings. The management team will also lead educational outreach activities for the general public in Nome and Barrow, Alaska, to explain the significance of the study to these communities and to learn from residents' insights on observed changes in the marine system. The project itself will provide for the support and training of a number of pre-doctoral students and post-doctoral researchers. Inasmuch as the Arctic Ocean is an epicenter of global climate change, findings of this study are expected to advance present capability to forecast changes in regional and globlal ecosystem and climate system functioning. As the United States' contribution to the International GEOTRACES Arctic Ocean initiative, this project will be part of an ongoing multi-national effort to further scientific knowledge about trace elements and isotopes in the world ocean. This U.S. expedition will focus on the western Arctic Ocean in the boreal summer of 2015. The scientific team will consist of the management team funded through this award plus a team of scientists from U.S. academic institutions who will have successfully competed for and received NSF funds for specific science projects in time to participate in the final stages of cruise planning. The cruise track segments will include the Bering Strait, Chukchi shelf, and the deep Canada Basin. Several stations will be designated as so-called super stations for intense study of atmospheric aerosols, sea ice, and sediment chemistry as well as water-column processes. In total, the set of coordinated international expeditions will involve the deployment of ice-capable research ships from 6 nations (US, Canada, Germany, Sweden, UK, and Russia) across different parts of the Arctic Ocean, and application of state-of-the-art methods to unravel the complex dynamics of trace metals and isotopes that are important as oceanographic and biogeochemical tracers in the sea.1b:T9de,NSF Award Abstract: In this project, investigators participating in the 2015 U.S. GEOTRACES Arctic expedition will measure lead concentrations and isotopic compositions in seawater, snow, and aerosol samples collected in the western Arctic Ocean. In common with other national initiatives in the International GEOTRACES Program, the goals of the U.S. Arctic expedition are 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. Some trace elements are essential to life, others are known biological toxins, and still others are important because they can be used as tracers of a variety of physical, chemical, and biological processes in the sea. Lead is an important substance to measure because it is a toxic trace element, ranked 2nd in the US Agency for Toxic Substances Disease Registry, and can be utilized as a tracer of ocean processes. The study will provide for the training and support of graduate and postdoctoral researchers. Lead (Pb) is emitted into the atmosphere by high temperature industrial activities and leaded gasoline consumption and is globally dispersed by the atmosphere. High concentrations of Pb have been observed in Arctic ice cores and aerosols, and there are significant concerns about Pb, mercury, and other toxic trace elements in Arctic ecosystems. However, there remain significant questions about how these toxic trace elements and their isotopes currently exist in the Arctic, as well as how they will change in the future Arctic as a result of retreating summer sea ice and extensive drilling, mining, and industrialization. This proposal is aimed at remedying this deficiency in scientific knowledge by measuring Pb and Pb isotopes from seawater profiles, sea ice/seawater interface, snow and aerosols that will be collected during the U.S. GEOTRACES western Arctic transect. Specifically, researchers will gain knowledge on 1) the penetration of anthropogenic lead into the Arctic Ocean, 2) the primary sources of lead to surface waters, 3) the distributions of lead and their relation to scavenging processes and rates, 4) how the exchange with sinking particles contributes to lead?s distribution, and 5) ocean circulation in the Arctic using lead as a tracer. Results from the study will have important implications for human health by increasing understanding of the distribution and abundance of a toxic trace element.6:["$","$L19",null,{"dataset":{"_id":"762056","description":"

Dissolved Pb concentration data from the US GEOTRACES Arctic Expedition (GN01, HLY1502).

\n","problem":"","acquisition":"

Samples were collected according to Cutter and Bruland 2012, utilizing a trace metal clean rosette (GT-C rosette). Samples above 20 m were pumped from a hole drilled in the ice far away from the ship or from a small boat, using clean sampling techniques. Dissolved Pb analyses were performed using techniques described in Lagerstrom et al. (2013). Samples were acidified to pH 1.8 and left for 2 months prior to analysis. Intercalibration results were submitted to and approved by the GEOTRACES S & I committee (see Supplmental Documents).

\n","processing":"

WOCE Quality Flags:
\n2 – Ok,
\n3 – Questionable,
\n4 – Bad Analysis,
\n5 – Sample lost,
\n6 – Mean of replicates,
\n9 – Sample was not collected for Pb analysis.

\n","bcodmoProcessing":"","title":"Dissolved Pb concentration data from the US GEOTRACES Arctic Expedition (GN01, HLY1502) from August to October 2015","nickname":"GN01 Dissolved Pb - UAF","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":true,"restricted":false,"version":"1","version_date":"2019-03-12T04:00:00.000Z","abstract":"Dissolved Pb concentration data from the US GEOTRACES Arctic Expedition (GN01, HLY1502).","citation":"Rember, R., Boyle, E. (2019) Dissolved Pb concentration data from the US GEOTRACES Arctic Expedition (GN01, HLY1502) from August to October 2015. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2019-03-12 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.762056.1 [access date]","citationParts":{"identifier":"doi:10.1575/1912/bco-dmo.762056.1","versionDate":"2019-03-12","versionId":"1","year":"2019","title":"Dissolved Pb concentration data from the US GEOTRACES Arctic Expedition (GN01, HLY1502) from August to October 2015","authors":"Rember, R., Boyle, E.","publisher":"Biological and Chemical Oceanography Data Management Office (BCO-DMO)."},"doi":"10.1575/1912/bco-dmo.762056.1","release_date":null,"field_dataset_location":"","temporal_extent":{"start":"2015-08-12T04:00:00.000Z","end":"2015-10-08T04:00:00.000Z"},"temporal":{"resolution":"time:unitDay","type":"time:Interval","start":{"value":"1439352000","label":"2015-08-12"},"end":{"value":"1444276800","label":"2015-10-08"}},"spatial_extent":{"shape":"polygon","center":{"latitude":75.08,"longitude":-0.1078},"wkt":"POLYGON ((-179.8082 60.165, 179.5926 60.165, 179.5926 89.995, -179.8082 89.995, -179.8082 60.165))","north":89.995,"east":179.5926,"south":60.165,"west":-179.8082},"dataset_type":["Cruise Results"],"keywords":["oceans"],"data_files":[{"id":"902465","title":"Pb_Dissolved_Rember.csv","url":"https://datadocs.bco-dmo.org/dataset/762056/file/6YYMl0EU02PvDj/Pb_Dissolved_Rember.csv","showTableUrl":"https://www.bco-dmo.org/dataset/762056/data/view/902465","description":"Primary data file for dataset ID 762056","filename":"Pb_Dissolved_Rember.csv","bytesize":31829,"checksum":{"value":"145aa1b2c3387025f57363f205fa9426","Algorithm":{"_id":"190","name":"MD5"}},"mimetype":"text/csv","fileType":{"_id":"192","name":"Comma Separated Values (.csv)"},"isErddap":"bcodmo_dataset_762056","date":"","isPublicDuringEmbargo":false,"primaryDataFile":true,"showTable":true,"restricted":false}],"supplemental_files":[{"id":"762090","title":"GEOTRACES Arctic Intercalibration Document Dissolved Pb","url":"https://datadocs.bco-dmo.org/docs/geotraces/GEOTRACES_ARCTIC/rember/data_docs/Rember_Boyle_US_GT_Arctic_Dissolved_Pb.pdf","showTableUrl":"","description":"Dissolved Pb Intercalibration report for Rember & Boyle from GEOTRACES Arctic.","filename":"Rember_Boyle_US_GT_Arctic_Dissolved_Pb.pdf","bytesize":424444,"checksum":{"value":"cfa4420825e465ec6e4cb26d3be66f34","Algorithm":{"_id":"190","name":"MD5"}},"mimetype":"application/pdf","fileType":{"_id":"336","name":"Portable Document Format (.pdf)"},"isErddap":"","date":"","isPublicDuringEmbargo":false,"primaryDataFile":false,"showTable":false,"restricted":false}],"roles":[{"role":{"_id":"138","name":"Principal Investigator"},"performedBy":{"_id":"751416","name":"Robert Rember"},"performedAtOrganization":{"_id":"13","name":"University of Alaska Fairbanks"}},{"role":{"_id":"140","name":"Co-Principal Investigator"},"performedBy":{"_id":"50984","name":"Edward A. Boyle"},"performedAtOrganization":{"_id":"222","name":"Massachusetts Institute of Technology"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"51498","name":"Shannon Rauch"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[{"_id":"638807","name":"HLY1502","synonyms":["GN01","U.S. GEOTRACES Arctic","32H120150809"],"dates":{"start":"2015-08-09T00:00:00.000Z","end":"2015-10-12T00:00:00.000Z"},"platform":{"_id":"523769","name":"USCGC Healy"},"chiefScientists":[{"id":"50615","name":"David C. Kadko","role":"Chief Scientist"},{"id":"51302","name":"William M. Landing","role":"Co-Chief Scientist"}]}],"funding":[{"_id":"751414","name":"OCE-1459270","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1459270"}],"instruments":[{"_id":"762066","name":"trace metal clean rosette (GT-C rosette)","description":"","type_id":"533","type_name":"GO-FLO Teflon Trace Metal Bottle","type_desc":"GO-FLO Teflon-lined Trace Metal free sampling bottles are used for collecting water samples for trace metal, nutrient and pigment analysis. The GO-FLO sampling bottle is designed specifically to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.","type_acronym":"GO-FLO Teflon TM"},{"_id":"762091","name":"ThermoFinnigan Element 2 Inductively Coupled Plasma Mass Spectrometer coupled (ICP-MS)","description":"Dissolved Pb was measured at the University of Alaska, Fairbanks using an ThermoFinnigan Element 2 Inductively Coupled Plasma Mass Spectrometer coupled (ICP-MS) to an Elemental Scientific SeaFAST S2 (syringe based system).","type_id":"530","type_name":"Inductively Coupled Plasma Mass Spectrometer","type_desc":"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.","type_acronym":"ICP Mass Spec"}],"parameters":[{"_id":"762067","name":"EXPOCODE","format":"","frictionlessType":"","description":"

Cruise EXPO code

","units":{"_id":"","name":"unitless"},"type":{"_id":"645727","name":"EXPOCODE","description":"

Used as a unique identifier for a cruise. Usual generation formula is ICES 4 character platform code then the cruise departure date in YYYYMDD format. An underscore character may also be present.

"}},{"_id":"762068","name":"SECT_ID","format":"","frictionlessType":"","description":"

Section ID

","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":"762069","name":"STNNBR","format":"","frictionlessType":"","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":"762070","name":"CASTNO","format":"","frictionlessType":"","description":"

Cast number

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

cast or profile number

"}},{"_id":"762071","name":"DATE","format":"","frictionlessType":"","description":"

Date (UTC); format: yyyymmdd

","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":"762072","name":"TIME","format":"","frictionlessType":"","description":"

Time (UTC); format: HHMM

","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":"762073","name":"LATITUDE","format":"","frictionlessType":"","description":"

Latitude; positive values = North

","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":"762074","name":"LONGITUDE","format":"","frictionlessType":"","description":"

Longitude; positive values = East

","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":"762075","name":"CTDPRS","format":"","frictionlessType":"","description":"

CTD Pressure

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

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

"}},{"_id":"762076","name":"CTDDEPTH","format":"","frictionlessType":"","description":"

CTD 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":"762077","name":"GEOTRC_SAMPNO","format":"","frictionlessType":"","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":"762078","name":"GEOTRC_EVENTNO","format":"","frictionlessType":"","description":"

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":"762079","name":"SAMPNO","format":"","frictionlessType":"","description":"

Sequential sample number within the cast (usually corresponds to bottle number).

","units":{"_id":"","name":"unitless"},"type":{"_id":"757","name":"bottle","description":"

water bottle number, generally assigned to a position on a CTD rosette, identifies all samples drawn from a given bottle

"}},{"_id":"762080","name":"BTLNBR","format":"","frictionlessType":"","description":"

Bottle number; typically 1-24.

","units":{"_id":"","name":"unitless"},"type":{"_id":"757","name":"bottle","description":"

water bottle number, generally assigned to a position on a CTD rosette, identifies all samples drawn from a given bottle

"}},{"_id":"762081","name":"PB_D_CONC_BOTTLE","format":"","frictionlessType":"","description":"

Dissolved lead (Pb) concentration

","units":{"_id":"","name":"picomoles per kilogram (pMol/kg)"},"type":{"_id":"1945","name":"trace_metal_conc","description":"

Concentration of a trace metal in seawater. Refer to dataset for element name and units.

"}},{"_id":"762082","name":"PB_CONC_FLAG","format":"","frictionlessType":"","description":"

WOCE Quality Flag for PB_D_CONC_BOTTLE

","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

"}}],"related_publications":[{"id":"738291","citation":"Cutter, G. A., & Bruland, K. W. (2012). Rapid and noncontaminating sampling system for trace elements in global ocean surveys. Limnology and Oceanography: Methods, 10(6), 425–436. doi:10.4319/lom.2012.10.425\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"762083","citation":"Lagerström, M. E., Field, M. P., Séguret, M., Fischer, L., Hann, S., & Sherrell, R. M. (2013). Automated on-line flow-injection ICP-MS determination of trace metals (Mn, Fe, Co, Ni, Cu and Zn) in open ocean seawater: Application to the GEOTRACES program. Marine Chemistry, 155, 71–80. doi:10.1016/j.marchem.2013.06.001\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/762056/data/view","contentType":"text/html","actionType":"view"}]},{"grouping":"ERDDAP","items":[{"name":"SUBSET DATA","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_762056.html","contentType":"text/html","actionType":"tool"},{"name":"VIEW TABLE","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_762056.htmlTable","contentType":"text/html","actionType":"view"},{"name":"CSV","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_762056.csv","contentType":"text/csv","actionType":"download"},{"name":"TSV","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_762056.tsv","contentType":"text/tsv","actionType":"download"},{"name":"GeoJSON","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_762056.geoJson","contentType":"application/geo+json","actionType":"download"},{"name":"MATLAB","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_762056.mat","contentType":"text/x-matlab","actionType":"download"},{"name":"netCDF","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_762056.nc","contentType":"application/x-netcdf","actionType":"download"}]},{"grouping":"Metadata","items":[{"name":"HTML","description":"A simple HTML page of the dataset metadata","url":"https://www.bco-dmo.org/dataset/762056/description","contentType":"text/html","actionType":"view"},{"name":"PDF","description":"A PDF of the HTML dataset metadata","url":"https://www.bco-dmo.org/dataset/762056/Dataset_description.pdf","contentType":"application/pdf","actionType":"download"},{"name":"ISO 19115-2 (NOAA Profile)","description":"","url":"https://www.bco-dmo.org/dataset/762056/iso","contentType":"application/xml","actionType":"download"}]}],"programs":[{"_id":"2022","name":"U.S. GEOTRACES","acronym":"U.S. GEOTRACES"}],"projects":[{"_id":"638812","name":"U.S. Arctic GEOTRACES Study (GN01)","acronym":"U.S. GEOTRACES Arctic","description":"$1a"},{"_id":"751410","name":"Collaborative Research: GEOTRACES Arctic section: Spatial variability of lead concentrations and isotopic compositions in the western Arctic basins","acronym":"GEOTRACES Arctic Pb","description":"$1b"}],"archives":[{"id_value":"10.1575/1912/bco-dmo.762056.1","url":"https://doi.org/10.1575/1912/bco-dmo.762056.1","date_assigned":"2019-07-01","version_date":"2019-03-12","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":119},"downloads":{"count":654}}}}]