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:T5dc,

Water sampling followed GEOTRACES protocols from a standard Niskin Bottle CTD/Rosette (Anderson et al. 2012). 4-5 L water samples were drained or filtered directly from Niskin bottles using Teflon-lined tygon tubing, acidified at sea with ultra-pure 6 molar hydrochloric acid, and analyzed at on-shore at MIT. Analysis involved Fe hydroxide co-precipitation, acid digestion, anion exchange chromatography and isotope dilution inductively-coupled plasma mass spectrometry. Laboratory methods were slightly modified from Anderson et al. (2012) as described by Hayes et al (2015).

References:

Anderson, R. F., M. Q. Fleisher, L. F. Robinson, R. L. Edwards, J. Hoff, S. B. Moran, M. M. Rutgers van der Loeff, A. L. Thomas, M. Roy-Barman, and R. Franois (2012), GEOTRACES intercalibration of 230Th, 232Th, 231Pa, and prospects for 10Be, Limnol. Oceanogr. Methods, 10, 179-213.

Hayes, C. T., R. F. Anderson, S. L. Jaccard, R. François, M. Q. Fleisher, M. Soon, and R. Gersonde (2013), A new perspective on boundary scavenging in the North Pacific Ocean, Earth Planet. Sci. Lett., 369-370(0), 86-97, doi:http://dx.doi.org/10.1016/j.epsl.2013.03.008.

Owens, S. A., K. O. Buesseler, and K. W. W. Sims. "Re-evaluating the 238 U-salinity relationship in seawater: implications for the 238 U-234 Th disequilibrium method." Marine Chemistry 127.1 (2011): 31-39.

1b:T49e,

Th isotope concentrations are derived from measured Th-232/Th-229 and Th-230/Th-229 ratios as determined by mass spectrometry. The Th-229 spike at MIT was calibrated against a gravimetric Th standard as well as an artificial seawater standard called SWSTD 2010-1, described by Anderson et al. (2012). Corrections for ingrowth of Th-230 from dissolved U-234 during sample storage were made based on measured salinity and the U-salinity relationship of Owens et al. (2011).

The dissolved “excess” Th-230 (Th_230_D_XS) is derived by subtracting from the measured dissolved Th-230 the component sourced from the partial dissolution of lithogenic material based on measured dissolved Th-232 and a lithogenic Th-230/232 atom ratio of 4 x 10-6, as described by Hayes et al. (2013).

BCO-DMO Processing:
- added conventional header with dataset name, PI name, version date
- renamed parameters to BCO-DMO standard
- changed longitude from positive to negative values

Cruise AE1410 was supported by UNOLS and NSF. The sample analysis was supported by the W.O. Crosby post-doctoral fellowship from MIT to Christopher Hayes.

1c:T78f,NSF Award Abstract: Overview: This grant will support a CST cruise on the R/V Atlantic Explorer from Barbados to Bermuda in May and June 2014. Chief Scientist Training (CST) cruises are part of an educational initiative designed for young US oceanographers, from senior graduate students to junior faculty, to increase their participation in seagoing research by educating them about the capabilities and opportunities provided by the UNOLS research fleet. In addition to providing sampling opportunities for individual research, a CST cruise is specifically organized to teach cruise participants how to successfully plan and execute a research cruise, from proposal to post-cruise reporting. Cruise participants will be selected based on the feasibility of their proposed Intellectual Merit: The ship track covers a oceanographically important transitional area in the western subtropical Atlantic, and thus the participants will be able to obtain scientifically valuable data in addition to gaining valuable skills and training that will help them to plan and execute successful cruises in their future careers. Broader Impacts: The CST cruise will help develop future expertise in the US oceanographic community by reducing the barriers to participation of young scientists in seagoing research, particularly those scientists from non ship-operator institutions. The activities proposed will help to disseminate information about the research opportunities that are provided by NSF and the UNOLS research fleet. The training and workshop activities are projected to increase the number and breadth of future proposals requesting ship support as well as to improve the quality of execution and success of funded cruises. The CST cruise opportunity will also help to broaden the geographic representation of the research community that is involved in ship-based scientific studies as well as increase the diversity of this community.6:["$","$L19",null,{"dataset":{"_id":"639016","description":"

This dataset was collected as part of a Chief Scientist Training Cruise, May-June 2014. The focus of this research was 'Tracking Saharan dust deposition in the Northwest Atlantic using Th isotopes'. This dataset is GEOTRACES-compliant.

\n","problem":"","acquisition":"$1a","processing":"$1b","bcodmoProcessing":"","title":"Seawater concentrations of dissolved and total Th-232 and Th-230 collected from the R/V Atlantic Explorer (AE1410) cruise from Barbados to Bermuda during 2014","nickname":"Barbados-Bermuda Th-232 Th-230","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":true,"restricted":false,"version":"2016-02-22","version_date":"2016-02-22T05:00:00.000Z","abstract":"Seawater concentrations of dissolved and total Th-232 and Th-230 were collected from the R/V Atlantic Explorer (AE1410) cruise from Barbados to Bermuda during 2014. This dataset was collected as part of a Chief Scientist Training Cruise, May-June 2014. The focus of this research was 'Tracking Saharan dust deposition in the Northwest Atlantic using Th isotopes'. This dataset is GEOTRACES-compliant.","citation":"Hayes, C. T. (2016) Seawater concentrations of dissolved and total Th-232 and Th-230 collected from the R/V Atlantic Explorer (AE1410) cruise from Barbados to Bermuda during 2014. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2016-02-22) Version Date 2016-02-22 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/639016 [access date]","citationParts":{"identifier":"http://lod.bco-dmo.org/id/dataset/639016","versionDate":"2016-02-22","versionId":"2016-02-22","year":"2016","title":"Seawater concentrations of dissolved and total Th-232 and Th-230 collected from the R/V Atlantic Explorer (AE1410) cruise from Barbados to Bermuda during 2014","authors":"Hayes, C. T.","publisher":"Biological and Chemical Oceanography Data Management Office (BCO-DMO)."},"doi":"","release_date":null,"field_dataset_location":"","temporal_extent":{"start":null,"end":null},"temporal":{"resolution":"","type":"","start":{"value":"","label":""},"end":{"value":"","label":""}},"spatial_extent":{"shape":"polygon","center":{"latitude":22.65415,"longitude":-62.0022},"wkt":" POLYGON((-64.1671 13.65, -59.8373 13.65, -59.8373 31.6583, -64.1671 31.6583, -64.1671 13.65))","north":31.6583,"east":-59.8373,"south":13.65,"west":-64.1671},"dataset_type":["Cruise Results"],"keywords":["oceans"],"data_files":[{"id":"900861","title":"Th_AE1410.csv","url":"https://datadocs.bco-dmo.org/dataset/639016/file/7DDMxvWiVlJ710/Th_AE1410.csv","showTableUrl":"https://www.bco-dmo.org/dataset/639016/data/view/900861","description":"Primary data file for dataset ID 639016","filename":"Th_AE1410.csv","bytesize":4140,"checksum":{"value":"6e2eb699b0386b96200041d8a9fcf6c9","Algorithm":{"_id":"190","name":"MD5"}},"mimetype":"text/csv","fileType":{"_id":"192","name":"Comma Separated Values (.csv)"},"isErddap":"","date":"","isPublicDuringEmbargo":false,"primaryDataFile":true,"showTable":true,"restricted":false}],"supplemental_files":[],"roles":[{"role":{"_id":"138","name":"Principal Investigator"},"performedBy":{"_id":"51626","name":"Christopher T. Hayes"},"performedAtOrganization":{"_id":"82","name":"University of Southern Mississippi"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"50396","name":"Nancy Copley"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[{"_id":"638976","name":"AE1410","synonyms":["GAc02"],"dates":{"start":"2014-05-30T00:00:00.000Z","end":"2014-06-12T00:00:00.000Z"},"platform":{"_id":"54122","name":"R/V Atlantic Explorer"},"chiefScientists":[{"id":"50678","name":"Maureen H. Conte","role":"Chief Scientist"}]}],"funding":[{"_id":"857112","name":"OCE-1360666","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1360666"}],"instruments":[{"_id":"639023","name":"","description":"Tisch Environmental PM10 aerosol sampler (TE-6070), using 20 cm x 25 cm Whatman41 filter sheets.","type_id":"691","type_name":"Aerosol Sampler","type_desc":"A device that collects a sample of aerosol (dry particles or liquid droplets) from the atmosphere.","type_acronym":""},{"_id":"639024","name":"","description":"5-L Go-Flo bottle, attached to the ship’s Kevlar line","type_id":"411","type_name":"GO-FLO Bottle","type_desc":"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.","type_acronym":"GO-FLO"},{"_id":"639025","name":"","description":"ship’s CTD with conventional Niskin bottles","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":"639028","name":"","description":"MITESS unit","type_id":"639027","type_name":"Trace element sampler","type_desc":"Automated trace element sampler (MITESS or ATE unit).\r\n\r\nBell, J., J. Betts, and E. Boyle (2002) MITESS: A Moored In-situ Trace Element Serial Sampler for Deep-Sea Moorings, Deep-Sea Research I: 49:2103-2118 (pdf)\r\n\r\nMore description: http://boyle.mit.edu/~ed/MITESS/MITESShomepage.html","type_acronym":""}],"parameters":[{"_id":"639029","name":"cruise_id","format":"","frictionlessType":"","description":"

cruise identification

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

cruise designation; name

"}},{"_id":"639030","name":"station","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":"639031","name":"sample","format":"","frictionlessType":"","description":"

sample number derived from cast and bottle numbers

","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":"639032","name":"date_start","format":"","frictionlessType":"","description":"

date at start of samping

","units":{"_id":"","name":"yyyymmdd"},"type":{"_id":"502628","name":"date_start","description":"

date sampling starts such as YYYYMMDD

"}},{"_id":"639033","name":"lat_start","format":"","frictionlessType":"","description":"

starting latitude; north is positive

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"870","name":"lat_start","description":"

latitude at start time of measurement; in decimal degrees (negative denotes South)

"}},{"_id":"639034","name":"lon_start","format":"","frictionlessType":"","description":"

starting longitude; east is positive

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"883","name":"lon_start","description":"

longitude at starting time of measurement (west is negative), in decimal degrees

"}},{"_id":"639035","name":"press","format":"","frictionlessType":"","description":"

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":"639036","name":"depth","format":"","frictionlessType":"","description":"

depth

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

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

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

"}},{"_id":"639037","name":"temp_ctd","format":"","frictionlessType":"","description":"

temperature from CTD

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

water temperature at measurement depth

"}},{"_id":"639038","name":"sal_ctd","format":"","frictionlessType":"","description":"

salinity from CTD

","units":{"_id":"","name":"unitless"},"type":{"_id":"1150","name":"sal_ctd","description":"

salinity from the CTD when water bottle tripped; calculated from conductivity per the PSS-78 scale

"}},{"_id":"639039","name":"O2_ctd","format":"","frictionlessType":"","description":"

dissolved oxygen from CTD

","units":{"_id":"","name":"umol/kg"},"type":{"_id":"910","name":"dissolved Oxygen","description":"

dissolved oxygen concentration

"}},{"_id":"639040","name":"BAC","format":"","frictionlessType":"","description":"

Beam Attenuation Coefficient from the transmissometer

","units":{"_id":"","name":"per meter"},"type":{"_id":"1147","name":"beam_cp","description":"

attenuation (loss of light) of a narrow, well collimated beam of light; beam attenuation due to particles; the particulate beam attenuation coefficient (cp)

"}},{"_id":"639041","name":"fluor","format":"","frictionlessType":"","description":"

fluorescence

","units":{"_id":"","name":"arbitrary units"},"type":{"_id":"835","name":"fluorescence","description":"

Fluorescence. Indirect measure of pigment concentration.

Units and collection method may vary. Units often reported in milligrams/meter^3 (mg/m3) or micromoles per liter (ug/L). Sometimes reported after being calibrated against extracted pigment concentrations.

In JGOFS/GLOBEC projects fluorescence is measured from CTD instrument sensor.

"}},{"_id":"639042","name":"Th_230_D_CONC_BOTTLE","format":"","frictionlessType":"","description":"

Dissolved (<0.45 um) Th-230 concentration

","units":{"_id":"","name":"uBq/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":"639043","name":"Th_230_D_CONC_BOTTLE_ERR","format":"","frictionlessType":"","description":"

Dissolved (<0.45 um) Th-230 concentration error

","units":{"_id":"","name":"uBq/kg"},"type":{"_id":"1975","name":"standard error","description":"

Generic standard error taking on the dimensions of the parameter it is tied to.

"}},{"_id":"639044","name":"Th_230_D_CONC_BOTTLE_FLAG","format":"","frictionlessType":"","description":"

quality flag: 1 = good; 2 = questionable; 3 = rejected

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

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

"}},{"_id":"639045","name":"Th_230_TD_CONC_BOTTLE","format":"","frictionlessType":"","description":"

Total dissolvable (from unfiltered water) Th-230 concentration

","units":{"_id":"","name":"uBq/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":"639046","name":"Th_230_TD_CONC_BOTTLE_ERR","format":"","frictionlessType":"","description":"

Total dissolvable (from unfiltered water) Th-230 concentration error

","units":{"_id":"","name":"uBq/kg"},"type":{"_id":"1946","name":"trace_metal_sd","description":"

Standard deviation reported for the concentration of a trace metal in seawater. Refer to dataset for element and units.

"}},{"_id":"639047","name":"Th_230_TD_CONC_BOTTLE_FLAG","format":"","frictionlessType":"","description":"

quality flag: 1 = good; 2 = questionable; 3 = rejected

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

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

"}},{"_id":"639048","name":"Th_232_D_CONC_BOTTLE","format":"","frictionlessType":"","description":"

Dissolved ((<0.45 um) Th-232 concentration

","units":{"_id":"","name":"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":"639049","name":"Th_232_D_CONC_BOTTLE_ERR","format":"","frictionlessType":"","description":"

Dissolved ((<0.45 um) Th-232 concentration error

","units":{"_id":"","name":"pmol/kg"},"type":{"_id":"1946","name":"trace_metal_sd","description":"

Standard deviation reported for the concentration of a trace metal in seawater. Refer to dataset for element and units.

"}},{"_id":"639050","name":"Th_232_D_CONC_BOTTLE_FLAG","format":"","frictionlessType":"","description":"

quality flag: 1 = good; 2 = questionable; 3 = rejected

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

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

"}},{"_id":"639051","name":"Th_232_TD_CONC_BOTTLE","format":"","frictionlessType":"","description":"

Total dissolvable (from unfiltered water) Th-232 concentration

","units":{"_id":"","name":"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":"639052","name":"Th_232_TD_CONC_BOTTLE_ERR","format":"","frictionlessType":"","description":"

Total dissolvable (from unfiltered water) Th-232 concentration error

","units":{"_id":"","name":"pmol/kg"},"type":{"_id":"1946","name":"trace_metal_sd","description":"

Standard deviation reported for the concentration of a trace metal in seawater. Refer to dataset for element and units.

"}},{"_id":"639053","name":"Th_232_TD_CONC_BOTTLE_FLAG","format":"","frictionlessType":"","description":"

quality flag: 1 = good; 2 = questionable; 3 = rejected

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

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

"}},{"_id":"639054","name":"Th_230_D_XS_CONC_BOTTLE","format":"","frictionlessType":"","description":"

Dissolved (<0.45 um) Th-230 corrected for lithogenic source

","units":{"_id":"","name":"uBq/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":"639055","name":"Th_230_D_XS_CONC_BOTTLE_ERR","format":"","frictionlessType":"","description":"

Dissolved (<0.45 um) Th-230 corrected for lithogenic source error

","units":{"_id":"","name":"uBq/kg"},"type":{"_id":"1946","name":"trace_metal_sd","description":"

Standard deviation reported for the concentration of a trace metal in seawater. Refer to dataset for element and units.

"}},{"_id":"639056","name":"Th_230_D_XS_CONC_BOTTLE_ERR_FLAG","format":"","frictionlessType":"","description":"

quality flag: 1 = good; 2 = questionable; 3 = rejected

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

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

"}},{"_id":"639057","name":"date_U_separated","format":"","frictionlessType":"","description":"

The date that uranium was chemically separated from thorium in the sample analysis; used in the ingrowth calculation

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

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

"}}],"related_publications":[],"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/639016/data/view","contentType":"text/html","actionType":"view"}]},{"grouping":"Metadata","items":[{"name":"HTML","description":"A simple HTML page of the dataset metadata","url":"https://www.bco-dmo.org/dataset/639016/description","contentType":"text/html","actionType":"view"},{"name":"PDF","description":"A PDF of the HTML dataset metadata","url":"https://www.bco-dmo.org/dataset/639016/Dataset_description.pdf","contentType":"application/pdf","actionType":"download"},{"name":"ISO 19115-2 (NOAA Profile)","description":"","url":"https://www.bco-dmo.org/dataset/639016/iso","contentType":"application/xml","actionType":"download"}]}],"programs":[],"projects":[{"_id":"857113","name":"Chief Scientist Training Cruise (Barbados-Bermuda, May 2014)","acronym":"NSF Chief Sci Training Barbados-Bermuda","description":"$1c"}],"archives":[],"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":150},"downloads":{"count":336}}}}]