http://lod.bco-dmo.org/id/dataset/878689
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
2022-08-16
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Activities of 210Po and 210Pb in aerosol samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018
2022-08-17
publication
2022-08-17
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2022-09-09
publication
https://doi.org/10.26008/1912/bco-dmo.878689.1
J. Kirk Cochran
Stony Brook University
principalInvestigator
David C. Kadko
Florida International University
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: Cochran, J. K., Kadko, D. C. (2022) Activities of 210Po and 210Pb in aerosol samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2022-08-17 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.878689.1 [access date]
GP15 210Po and 210Pb Aerosols Leg 1 Dataset Description: Methods and Sampling: <p>Aerosol samples were collected by Clifton Buck and colleagues, who were funded separately. Bulk aerosol samples were collected on 12-replicate acid-washed, 47-mm Whatman 41 (W41) ashless filter discs mounted in Advantec-MFS polypropylene open-face filter holders. Three filters with combined filter air volumes of ~360 to&nbsp;1100 cubic meters&nbsp;were provided for 210Po and 210Pb. Aerosol filters were placed in microwave digestion vessels, spiked with 209Po tracer (1.76 dpm) and 10 mg stable Pb, and totally dissolved in a mixture of concentrated 5 mL of HCl, HNO3, and HF. Sample solutions were centrifuged, evaporated to dryness, redissolved in concentrated HCl, evaporated again, and picked up in 1.5N HCl for plating. Po was plated onto silver discs with heating for 3 hours. Residual Po was removed from the samples by suspending a piece of scrap Ag in them for 5 days, with periodic stirring, after which they were transferred to polycarbonate bottles for storage and ingrowth of additional 210Po. An aliquot of each stored solution was analyzed for Pb concentration by Inductively-Coupled-Plasma Mass Spectroscopy to determine Pb recoveries. Recoveries generally ranged from 83-100% (average 92 ± 6%). A second plating was carried out after ~6 months of storage to determine 210Pb from ingrown 210Po. All activities were corrected as appropriate to the time of sample collection, as described in Rigaud et al. (2013), and complete details are given in Wei (2021). Detector backgrounds and blanks were subtracted from all samples, and blank activities were less than 8% those of the aerosol samples. Errors were propagated using standard error propagation formulas (Rigaud et al., 2013) and included counting errors on sample, background and blank 210Po and 209Po, spiking errors, weighing errors (for water samples) and uncertainty of the 209Po tracer activity. Due to the long time interval between sampling and initial 210Po plating, the ingrowth and decay corrections for 210Po were large. As a consequence, the initial 210Po/210Pb activity ratio in most samples is small and scatters around 0.0 ± 0.2.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1736591 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1736591
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1736612 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1736612
completed
J. Kirk Cochran
Stony Brook University
631-632-8733
School of Marine & Atmospheric Sciences
Stony Brook
NY
11794-5000
USA
kirk.cochran@stonybrook.edu
pointOfContact
David C. Kadko
Florida International University
305-348-5016
Florida International University, Applied Research Center 10555 West Flagler St.
Miami
FL
33174
USA
dkadko@fiu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
GEOTRC_SAMPNO
Start_ISO_DateTime_UTC
End_ISO_DateTime_UTC
Start_Latitude
Start_Longitude
End_Latitude
End_Longitude
Air_Volume_Total
Po_210_A_T_CONC_HIVOL_orqizd
SD1_Po_210_A_T_CONC_HIVOL_orqizd
Flag_Po_210_A_T_CONC_HIVOL_orqizd
Pb_210_A_T_CONC_HIVOL_zxeaxo
SD1_Pb_210_A_T_CONC_HIVOL_zxeaxo
Flag_Pb_210_A_T_CONC_HIVOL_zxeaxo
Inductively-Coupled-Plasma Mass Spectroscopy
theme
None, User defined
sample identification
ISO_DateTime_UTC
latitude
longitude
sample_volume
radioactive_isotope_activity
quality flag
featureType
BCO-DMO Standard Parameters
Aerosol Sampler
Inductively Coupled Plasma Mass Spectrometer
instrument
BCO-DMO Standard Instruments
RR1814
service
Deployment Activity
Seattle, WA to Hilo, HI
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
Collaborative Research: Lead-210 and Polonium-210 as tracers for scavenging and export: GEOTRACES Pacific Meridional Section
https://osprey.bco-dmo.org/project/875069
Collaborative Research: Lead-210 and Polonium-210 as tracers for scavenging and export: GEOTRACES Pacific Meridional Section
<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. These chemical species play important roles in the ocean as nutrients, tracers of current and past oceanographic processes, and as contaminants from human activity. Their biogeochemical cycling has direct implications for research in such diverse areas as the carbon cycle, climate change, and ocean ecosystems. This project will use measurement of two natural radionuclides -- lead-210 and polonium-210 -- to provide important information about the rates of processes that affect trace elements and isotopes (TEIs) that will be measured during a U.S. GEOTRACES expedition in the Pacific Ocean in 2018. The research proposed here will address key tasks formulated within the GEOTRACES Science Plan.</p>
<p>Many processes in the ocean cannot be observed directly but tracers such as polonium-210 (half-life = 138 days) and lead-210 (half-life = 22.3 years) that have unique chemical properties and relevant decay timescales can be used to provide important constraints on their rates and pathways. The goals of this research are to: 1) use Pb-210, along with another project measuring Be-7, in aerosols and precipitation to characterize aerosol and TEI sources, 2) determine scavenging rates of particle-reactive TEIs through the water column using Po-210 and Pb-210, 3) use Po-210 / Pb-210 disequilibrium in the upper water column as a proxy for the sinking flux of particulate organic carbon (POC), and 4) use Pb-210as a tracer of the influence of hydrothermal processes on water column distributions of TEIs. This work will build on a database of Po/Pb distributions in the world ocean (and the Pacific Ocean, in particular) obtained through programs such as GEOSECS, GEOTRACES, and independent studies. A graduate student will be trained as part of this project. The lead investigator, Cochran, plans to incorporate information about GEOTRACES sampling strategies in the planning for a travelling exhibition on "The Oceans" through his adjunct appointment at the American Museum of Natural History (New York). Project partner Kadko plans to incorporate GEOTRACES work in an international graduate course through the Nippon Foundation, Partnership for Observation of the Global Oceans Center of Excellence.</p>
PMT Lead-210 and Polonium-210
largerWorkCitation
project
eng; USA
oceans
Seattle, WA to Hilo, HI
-155.72
-129.04
22
55.08
2018-09-20
2018-10-20
Pacific Meridional Transect along 152W (GP15)
0
BCO-DMO catalogue of parameters from Activities of 210Po and 210Pb in aerosol samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 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/878716.rdf
Name: GEOTRC_SAMPNO
Units: unitless
Description: <p>GEOTRACES sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/878717.rdf
Name: Start_ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) at start of sample collection in ISO8601 format: YYYY-MM-DDThh:mmZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/878718.rdf
Name: End_ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) at end of sample collection in ISO8601 format: YYYY-MM-DDThh:mmZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/878719.rdf
Name: Start_Latitude
Units: degrees North
Description: <p>Latitude at start of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/878720.rdf
Name: Start_Longitude
Units: degrees East
Description: <p>Longitude at start of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/878721.rdf
Name: End_Latitude
Units: degrees North
Description: <p>Latitude at end of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/878722.rdf
Name: End_Longitude
Units: degrees East
Description: <p>Longitude at end of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/878723.rdf
Name: Air_Volume_Total
Units: cubic meters
Description: <p>Air volume sampled</p>
http://lod.bco-dmo.org/id/dataset-parameter/878724.rdf
Name: Po_210_A_T_CONC_HIVOL_orqizd
Units: mBq/m3
Description: <p>210Po activity</p>
http://lod.bco-dmo.org/id/dataset-parameter/878725.rdf
Name: SD1_Po_210_A_T_CONC_HIVOL_orqizd
Units: mBq/m3
Description: <p>One standard deviation of Po_210_A_T_CONC_HIVOL_orqizd</p>
http://lod.bco-dmo.org/id/dataset-parameter/878726.rdf
Name: Flag_Po_210_A_T_CONC_HIVOL_orqizd
Units: unitless
Description: <p>Quality flag for Po_210_A_T_CONC_HIVOL_orqizd</p>
http://lod.bco-dmo.org/id/dataset-parameter/878727.rdf
Name: Pb_210_A_T_CONC_HIVOL_zxeaxo
Units: mBq/m3
Description: <p>210Pb activity</p>
http://lod.bco-dmo.org/id/dataset-parameter/878728.rdf
Name: SD1_Pb_210_A_T_CONC_HIVOL_zxeaxo
Units: mBq/m3
Description: <p>One standard deviation of Pb_210_A_T_CONC_HIVOL_zxeaxo</p>
http://lod.bco-dmo.org/id/dataset-parameter/878729.rdf
Name: Flag_Pb_210_A_T_CONC_HIVOL_zxeaxo
Units: unitless
Description: <p>Quality flag for Pb_210_A_T_CONC_HIVOL_zxeaxo</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
1559
https://darchive.mblwhoilibrary.org/bitstream/1912/29328/1/dataset-878689_gp15-210po-and-210pb-aerosols-leg-1__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.878689.1
download
onLine
dataset
<p>Aerosol samples were collected by Clifton Buck and colleagues, who were funded separately. Bulk aerosol samples were collected on 12-replicate acid-washed, 47-mm Whatman 41 (W41) ashless filter discs mounted in Advantec-MFS polypropylene open-face filter holders. Three filters with combined filter air volumes of ~360 to&nbsp;1100 cubic meters&nbsp;were provided for 210Po and 210Pb. Aerosol filters were placed in microwave digestion vessels, spiked with 209Po tracer (1.76 dpm) and 10 mg stable Pb, and totally dissolved in a mixture of concentrated 5 mL of HCl, HNO3, and HF. Sample solutions were centrifuged, evaporated to dryness, redissolved in concentrated HCl, evaporated again, and picked up in 1.5N HCl for plating. Po was plated onto silver discs with heating for 3 hours. Residual Po was removed from the samples by suspending a piece of scrap Ag in them for 5 days, with periodic stirring, after which they were transferred to polycarbonate bottles for storage and ingrowth of additional 210Po. An aliquot of each stored solution was analyzed for Pb concentration by Inductively-Coupled-Plasma Mass Spectroscopy to determine Pb recoveries. Recoveries generally ranged from 83-100% (average 92 ± 6%). A second plating was carried out after ~6 months of storage to determine 210Pb from ingrown 210Po. All activities were corrected as appropriate to the time of sample collection, as described in Rigaud et al. (2013), and complete details are given in Wei (2021). Detector backgrounds and blanks were subtracted from all samples, and blank activities were less than 8% those of the aerosol samples. Errors were propagated using standard error propagation formulas (Rigaud et al., 2013) and included counting errors on sample, background and blank 210Po and 209Po, spiking errors, weighing errors (for water samples) and uncertainty of the 209Po tracer activity. Due to the long time interval between sampling and initial 210Po plating, the ingrowth and decay corrections for 210Po were large. As a consequence, the initial 210Po/210Pb activity ratio in most samples is small and scatters around 0.0 ± 0.2.</p>
Specified by the Principal Investigator(s)
<p><strong>Data Processing:</strong><br />
Data were processed in Excel&nbsp;spreadsheets (according to the approach of Rigaud et al. (2013).</p>
<p>Quality flags were applied following the GEOTRACES flag definitions (<a href="https://www.geotraces.org/geotraces-quality-flag-policy/" target="_blank">https://www.geotraces.org/geotraces-quality-flag-policy/</a>) where 1 = "good data".</p>
<p><strong>BCO-DMO Processing:</strong><br />
- renamed fields to comply with BCO-DMO naming conventions;<br />
- created start and end date-time fields in ISO8601 format;<br />
- renamed StationID to GEOTRC_SAMPNO.</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
PI Supplied Instrument Name: PI Supplied Instrument Description:Bulk aerosol samples were collected on 12-replicate acid-washed, 47-mm Whatman 41 (W41) ashless filter discs mounted in Advantec-MFS polypropylene open-face filter holders Instrument Name: Aerosol Sampler Instrument Short Name: Instrument Description: A device that collects a sample of aerosol (dry particles or liquid droplets) from the atmosphere. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/13/
Inductively-Coupled-Plasma Mass Spectroscopy
Inductively-Coupled-Plasma Mass Spectroscopy
PI Supplied Instrument Name: Inductively-Coupled-Plasma Mass Spectroscopy 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/
Cruise: RR1814
RR1814
R/V Roger Revelle
Community Standard Description
International Council for the Exploration of the Sea
R/V Roger Revelle
vessel
RR1814
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 RR1814
R/V Roger Revelle
Community Standard Description
International Council for the Exploration of the Sea
R/V Roger Revelle
vessel