http://lod.bco-dmo.org/id/dataset/819622
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
2020-07-28
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Dissolved thorium-230 and thorium-232 from R/V Pelican cruise PE17-24 in the deep Northern Gulf of Mexico during June 2017
2020-07-31
publication
2020-07-31
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-07-31
publication
https://doi.org/10.26008/1912/bco-dmo.819622.1
Christopher T. Hayes
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: Hayes, C. (2020) Dissolved thorium-230 and thorium-232 from R/V Pelican cruise PE17-24 in the deep Northern Gulf of Mexico during June 2017. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-07-31 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.819622.1 [access date]
Dissolved thorium-230 and thorium-232 from the deep Northern Gulf of Mexico Dataset Description: <p>Dissolved thorium-230 and thorium-232 from the deep Northern Gulf of Mexico collected on R/V Pelican cruise&nbsp;PE17-24 during June 2017.</p>
<p>Note: These data were collected&nbsp;through auxiliary activities in coordination with the GEOTRACES PMT project funded by NSF OCE-1737023.</p> Methods and Sampling: <p>Sampling occurred according the GEOTRACES cookbook recommendations for radionuclides (<a href="https://www.geotraces.org/methods-cookbook/" target="_blank">https://www.geotraces.org/methods-cookbook/</a>). Water was filtered from standard Niskin bottles through a 0.45 micron Acropak capsule filter and teflon line tygon tubing. Water was acidified to 0.024 M HCl using optima acid once the samples were returned to the lab about 2-3 days after collection. Water samples were left to sit acidified for at least 3 months prior to analysis to avoid adsorption loss.</p>
<p>Analysis of the thorium isotopes was by isotope dilution inductively-coupled plasma mass spectrometry as described by Hayes et al. (2017). Briefly, thorium-229 was added to acidified 4-liter water samples and allowed to equilibrate overnight. About 10 mg of Fe from an iron chloride solution was added and pH was raised with optima ammonium hydroxide to 8-9 and iron (oxy)hydroxide precipitate was allowed to settle for 2 days. Overlaying seawater was decanted and the iron precipitate was isolated using a series of centrifugation steps. The precipitate was digested with HNO3, HF and H2O2, then thorium was purified using anion exchange resin AG1-X8. Final solutions were dried down and taken up in 2% HNO3 for analysis on ICP-MS.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1737023 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1737023
completed
Christopher T. Hayes
University of Southern Mississippi
228-688-3469
Department of Marine Science 1020 Balch Boulevard
Stennis Space Center
MS
39529
USA
christopher.t.hayes@usm.edu
pointOfContact
asNeeded
Dataset Version: 1
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
Th_230_D_CONC_BOTTLE_xdopme
SD1_Th_230_D_CONC_BOTTLE_xdopme
Flag_Th_230_D_CONC_BOTTLE_xdopme
Th_232_D_CONC_BOTTLE_bf1qqr
SD1_Th_232_D_CONC_BOTTLE_bf1qqr
Flag_Th_232_D_CONC_BOTTLE_bf1qqr
Inductively-coupled plasma mass spectrometry
Niskin bottles
theme
None, User defined
station
date
time of day
ISO_DateTime_UTC
latitude
longitude
event
sample identification
depth
trace metal concentration
quality flag
featureType
BCO-DMO Standard Parameters
Inductively Coupled Plasma Mass Spectrometer
Niskin bottle
instrument
BCO-DMO Standard Instruments
PE17-24
service
Deployment Activity
Northern Gulf of Mexico
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.
Collaborative Research: U.S. GEOTRACES Pacific Meridional Transect: Thorium-232, Thorium-230 and Protactinium-231 as tracers of trace element supply and removal
https://osprey.bco-dmo.org/project/819611
Collaborative Research: U.S. GEOTRACES Pacific Meridional Transect: Thorium-232, Thorium-230 and Protactinium-231 as tracers of trace element supply and removal
<p><em>NSF Award Abstract:</em><br />
The goal of the international GEOTRACES program is to understand the distributions of trace chemical elements and their isotopes in the oceans. Many trace elements are essential for life and their extremely low concentrations in seawater are thought to limit biological productivity (fertility) throughout much of the ocean. This limitation, in turn, partially constrains the level of fisheries that can be supported by marine ecosystems as well as the ocean's capacity to absorb carbon dioxide from the atmosphere. Whereas the importance of these trace-element micronutrients is well established, many basic features of their ocean distribution remain unknown. Measurements of other elements and isotopes can be used to understand the processes that influence the distributions of the micronutrient elements. Two naturally-occurring radioactive isotopes that are particularly important in this regard are thorium-230 and protactinium-231, which have been designated as key parameters to be measured as part of GEOTRACES. This project will focus on the measurement of these two isotopes in order to provide critical information about the processes that supply iron to the Pacific Ocean, as well as the rates of those processes. The project will support an early career investigator, a postdoctoral researcher, and students at the undergraduate and graduate levels.</p>
<p>Samples of seawater and of suspended particulate material will be collected along a north-south transect between Alaska and Tahiti to examine the processes that supply and remove trace elements. These samples will be analyzed for naturally-occurring radionuclides thorium-232, thorium-230 and protactinium-231. Aerosol samples and sediments collected along the transect will be analyzed as well. In collaboration with other investigators involved in the expedition, this project will:</p>
<p>1) Interpret the distributions of thorium-232 and thorium-230 to quantify the supply of iron and other trace elements delivered by dust as well as the trace elements supplied by chemical reactions in volcanic sediments along the Alaskan margin,<br />
2) Determine the sinking flux of major particulate phases and of particulate trace elements throughout the water column to quantify their rate of removal from the ocean, and<br />
3) Compare the rate of trace element removal among contrasting environmental regimes to be encountered along the Alaska to Tahiti transect to identify the key physical, chemical and biological factors, such as dust supply and biological productivity, that regulate the rate of trace element removal from the ocean.</p>
<p>Note: Additional datasets from cruises PE17-24 and PS1718 were collected as complementary activities to this project and were supported by NSF award OCE-1737023.</p>
PMT Thorium Isotopes
largerWorkCitation
project
eng; USA
oceans
Northern Gulf of Mexico
-90.826
-90.824
26.526
26.53
2017-06-25
2017-06-25
0
BCO-DMO catalogue of parameters from Dissolved thorium-230 and thorium-232 from R/V Pelican cruise PE17-24 in the deep Northern Gulf of Mexico during June 2017
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/819636.rdf
Name: Station_ID
Units: unitless
Description: <p>Station identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/819637.rdf
Name: Start_Date_UTC
Units: unitless
Description: <p>Start date; format: DD/MM/YYYY</p>
http://lod.bco-dmo.org/id/dataset-parameter/819638.rdf
Name: Start_Time_UTC
Units: unitless
Description: <p>Start time (UTC); format: hh:mm</p>
http://lod.bco-dmo.org/id/dataset-parameter/819639.rdf
Name: Start_ISO_DateTime_UTC
Units: unitless
Description: <p>Start date and time (UTC) formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/819640.rdf
Name: End_Date_UTC
Units: unitless
Description: <p>End date; format: DD/MM/YYYY</p>
http://lod.bco-dmo.org/id/dataset-parameter/819641.rdf
Name: End_Time_UTC
Units: unitless
Description: <p>End time (UTC); format: hh:mm</p>
http://lod.bco-dmo.org/id/dataset-parameter/819642.rdf
Name: End_ISO_DateTime_UTC
Units: unitless
Description: <p>End date and time (UTC) formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/819643.rdf
Name: Start_Latitude
Units: decimal degrees North
Description: <p>Start latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/819644.rdf
Name: Start_Longitude
Units: decimal degrees East
Description: <p>Start longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/819645.rdf
Name: End_Latitude
Units: decimal degrees North
Description: <p>End latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/819646.rdf
Name: End_Longitude
Units: decimal degrees East
Description: <p>End longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/819647.rdf
Name: Event_ID
Units: unitless
Description: <p>Event identifer</p>
http://lod.bco-dmo.org/id/dataset-parameter/819648.rdf
Name: Sample_ID
Units: unitless
Description: <p>Sample identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/819649.rdf
Name: Sample_Depth
Units: meters (m)
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/819650.rdf
Name: Th_230_D_CONC_BOTTLE_xdopme
Units: microBecquerels per kilogram (uBq/kg)
Description: <p>Concentration (or activity) of dissolved 230Th</p>
http://lod.bco-dmo.org/id/dataset-parameter/819651.rdf
Name: SD1_Th_230_D_CONC_BOTTLE_xdopme
Units: microBecquerels per kilogram (uBq/kg)
Description: <p>One standard deviation of Th_230_D_CONC_BOTTLE_xdopme</p>
http://lod.bco-dmo.org/id/dataset-parameter/819652.rdf
Name: Flag_Th_230_D_CONC_BOTTLE_xdopme
Units: unitless
Description: <p>Quality flag for Th_230_D_CONC_BOTTLE_xdopme</p>
http://lod.bco-dmo.org/id/dataset-parameter/819653.rdf
Name: Th_232_D_CONC_BOTTLE_bf1qqr
Units: picomoles per kilogram (pmol/kg)
Description: <p>Concentration (or activity) of dissolved 232Th</p>
http://lod.bco-dmo.org/id/dataset-parameter/819654.rdf
Name: SD1_Th_232_D_CONC_BOTTLE_bf1qqr
Units: picomoles per kilogram (pmol/kg)
Description: <p>One standard deviation of Th_232_D_CONC_BOTTLE_bf1qqr</p>
http://lod.bco-dmo.org/id/dataset-parameter/819655.rdf
Name: Flag_Th_232_D_CONC_BOTTLE_bf1qqr
Units: unitless
Description: <p>Quality flag for Th_232_D_CONC_BOTTLE_bf1qqr</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
1904
https://darchive.mblwhoilibrary.org/bitstream/1912/26038/1/dataset-819622_dissolved-thorium-isotopes-pe17-24__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.819622.1
download
onLine
dataset
<p>Sampling occurred according the GEOTRACES cookbook recommendations for radionuclides (<a href="https://www.geotraces.org/methods-cookbook/" target="_blank">https://www.geotraces.org/methods-cookbook/</a>). Water was filtered from standard Niskin bottles through a 0.45 micron Acropak capsule filter and teflon line tygon tubing. Water was acidified to 0.024 M HCl using optima acid once the samples were returned to the lab about 2-3 days after collection. Water samples were left to sit acidified for at least 3 months prior to analysis to avoid adsorption loss.</p>
<p>Analysis of the thorium isotopes was by isotope dilution inductively-coupled plasma mass spectrometry as described by Hayes et al. (2017). Briefly, thorium-229 was added to acidified 4-liter water samples and allowed to equilibrate overnight. About 10 mg of Fe from an iron chloride solution was added and pH was raised with optima ammonium hydroxide to 8-9 and iron (oxy)hydroxide precipitate was allowed to settle for 2 days. Overlaying seawater was decanted and the iron precipitate was isolated using a series of centrifugation steps. The precipitate was digested with HNO3, HF and H2O2, then thorium was purified using anion exchange resin AG1-X8. Final solutions were dried down and taken up in 2% HNO3 for analysis on ICP-MS.</p>
Specified by the Principal Investigator(s)
<p>Data processing: Thorium-230 and thorium-232 concentrations were determined using measured 232/229 and 230/229 ratios and a gravimetrically-calibrated Th-229 spike. Corrections for mass bias and tail-corrections were estimated using U-238/235 and U-234/235 ratios, respectively, using a uranium standard CRM-112a.</p>
<p>Quality flags:&nbsp;Data were flagged using the SeaDataNet quality flag scheme. For more information on SeaDataNet flags, see:&nbsp;<a href="https://www.geotraces.org/geotraces-quality-flag-policy/" target="_blank">https://www.geotraces.org/geotraces-quality-flag-policy/</a>&nbsp;and&nbsp;<a href="https://www.seadatanet.org/Standards/Data-Quality-Control" target="_blank">https://www.seadatanet.org/Standards/Data-Quality-Control</a></p>
<p>SeaDataNet quality flag definitions:<br />
0 = No quality control;<br />
1 = Good value;<br />
2 = Probably good value;<br />
3 = Probably bad value;<br />
4 = Bad value;<br />
5 = Changed value;<br />
6 = Value below detection;<br />
7 = Value in excess;<br />
8 = Interpolated value;<br />
9 = Missing value;<br />
A = Value phenomenon uncertain.</p>
<p>BCO-DMO Processing:<br />
- modified parameter names;<br />
- added ISO8601 date/time fields;<br />
- rounded&nbsp;Th_230_D_CONC_BOTTLE columns.</p>
Specified by the Principal Investigator(s)
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
Inductively-coupled plasma mass spectrometry
Inductively-coupled plasma mass spectrometry
PI Supplied Instrument Name: Inductively-coupled plasma mass spectrometry 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/
Niskin bottles
Niskin bottles
PI Supplied Instrument Name: Niskin bottles Instrument Name: Niskin bottle Instrument Short Name:Niskin bottle Instrument Description: 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. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/
Cruise: PE17-24
PE17-24
R/V Pelican
Community Standard Description
International Council for the Exploration of the Sea
R/V Pelican
vessel
PE17-24
Marcus Ogle
R/V Pelican
Community Standard Description
International Council for the Exploration of the Sea
R/V Pelican
vessel