http://lod.bco-dmo.org/id/dataset/825984
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
2020-10-02
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Water column profiles of dissolved Actinium-227 (227Ac) from the U.S. GEOTRACES Arctic cruise (HLY1502; GN01) on USCGC Healy from August to October 2015
2020-10-02
publication
2020-10-02
revision
BCO-DMO Linked Data URI
2020-10-02
creation
http://lod.bco-dmo.org/id/dataset/825984
Douglas E. Hammond
University of Southern California
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: Hammond, D. E. (2020) Water column profiles of dissolved Actinium-227 (227Ac) from the U.S. GEOTRACES Arctic cruise (HLY1502; GN01) on USCGC Healy from August to October 2015. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-10-02 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/825984 [access date]
Water column profiles of dissolved 227Ac in the Arctic Dataset Description: Methods and Sampling: <p>In summary: Filtered water from McLane submersible pumps was passed through acetate filter cartridges impregnated with MnO2. Ac, along with Ra and Th, were sorbed to the cartridges. These were returned to USC and analyzed.</p>
<p>See Methodology Supplemental File (BCO-DMO_227Ac_Methods_for_Arctic_Geotraces_GN01.pdf) for details.</p>
<p>Problem report: Some pump deployments failed to deliver sufficient water (nd).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1436958 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1436958
onGoing
Douglas E. Hammond
University of Southern California
310-490-7896
3651 Trousdale Pkwy Earth Sciences ZHS117
Los Angeles
CA
90089-0740
USA
dhammond@usc.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Cruise_ID
GEOTRC_CASTNO
GEOTRC_INSTR
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
Vol_Flag
Ac227
sig_ex227Ac
Ac_Flag
Excess_227Ac
sig_ex227Ac_2
Excess_Ac_Flag
RaDeCC
theme
None, User defined
Cruise identfier
cast
instrument
station
date
time of day
ISO_DateTime_UTC
latitude
longitude
event
sample identification
depth
flag
actinium-227
quality flag
featureType
BCO-DMO Standard Parameters
McLane Pump
Radium Delayed Coincidence Counter
instrument
BCO-DMO Standard Instruments
HLY1502
service
Deployment Activity
Western Arctic Ocean
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
U.S. Arctic GEOTRACES Study (GN01)
https://www.geotraces.org/
U.S. Arctic GEOTRACES Study (GN01)
<p><em>Description from NSF award abstract:</em><br />
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.</p>
<p>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.</p>
U.S. GEOTRACES Arctic
largerWorkCitation
project
GEOTRACES Arctic Section: Actinium-227 as a Naturally-occurring Tracer of Dissolved Material Transport in the Arctic Ocean
https://osprey.bco-dmo.org/project/808658
GEOTRACES Arctic Section: Actinium-227 as a Naturally-occurring Tracer of Dissolved Material Transport in the Arctic Ocean
<p><em>NSF Award Abstract:</em><br />
In this project, a group of investigators participating in the 2015 U.S. GEOTRACES Arctic expedition will measure profiles of actinium-227, a naturally-occurring radioisotope that can be used as a tracer of oceanic water movement, in the Arctic Ocean. In common with other multinational 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. The isotope measured as part of this study, actinium-227, has a 22 year half-life, making it well-suited as a tracer of mixing and solute transport in the Arctic Ocean. This study will involve educational opportunities in scientific research for high school and undergraduate students.</p>
<p>Quantifying the biogeochemical dynamics of the deep sea is necessary to understand the ocean carbon cycle. Despite having a half-life that is well suited for the study of both vertical and lateral transport in the deep ocean, few actinium-227 measurements have been made in the deep sea. Recent advances in instrumentation facilitate this analysis, and the synergy provided by the GEOTRACES program will provide an ideal opportunity to obtain additional data that will serve two purposes. The measurements of actinium-227 from this study will aid in defining the rates of boundary exchange, particularly when combined with estimates based on radium-228 (measured as part of a separate award) and will be useful for deducing the transport and the dynamics of other solutes measured by GEOTRACES in deep waters. By using multiple tracers with different half-lives, the separate roles of these processes may be distinguished, allowing a more complete understanding of the dynamics of solute behaviors.</p>
GT Arctic 227Ac
largerWorkCitation
project
eng; USA
oceans
Western Arctic Ocean
-180
174.817
60.224
89.989
2015-08-12
2015-10-08
From projects that focused on the following 2 locations: 1. Arctic Ocean; Sailing from Dutch Harbor to Dutch Harbor (GN01) 2. Bering Sea to North Pole
0
BCO-DMO catalogue of parameters from Water column profiles of dissolved Actinium-227 (227Ac) from the U.S. GEOTRACES Arctic cruise (HLY1502; GN01) on USCGC Healy from August to October 2015
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/825999.rdf
Name: Cruise_ID
Units: unitless
Description: <p>Cruise identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/826000.rdf
Name: GEOTRC_CASTNO
Units: unitless
Description: <p>Cast number</p>
http://lod.bco-dmo.org/id/dataset-parameter/826001.rdf
Name: GEOTRC_INSTR
Units: unitless
Description: <p>Instrument</p>
http://lod.bco-dmo.org/id/dataset-parameter/826002.rdf
Name: Station_ID
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/826003.rdf
Name: Start_Date_UTC
Units: unitless
Description: <p>Start date; format: MM/DD/YYYY</p>
http://lod.bco-dmo.org/id/dataset-parameter/826004.rdf
Name: Start_Time_UTC
Units: unitless
Description: <p>Start time; format: hh:mm</p>
http://lod.bco-dmo.org/id/dataset-parameter/826005.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/826006.rdf
Name: End_Date_UTC
Units: unitless
Description: <p>End date; format: MM/DD/YYYY</p>
http://lod.bco-dmo.org/id/dataset-parameter/826007.rdf
Name: End_Time_UTC
Units: unitless
Description: <p>End time; format: hh:mm</p>
http://lod.bco-dmo.org/id/dataset-parameter/826008.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/826009.rdf
Name: Start_Latitude
Units: degrees North
Description: <p>Start latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/826010.rdf
Name: Start_Longitude
Units: degrees East
Description: <p>Start longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/826011.rdf
Name: End_Latitude
Units: degrees North
Description: <p>End latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/826012.rdf
Name: End_Longitude
Units: degrees East
Description: <p>End longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/826013.rdf
Name: Event_ID
Units: unitless
Description: <p>Event number</p>
http://lod.bco-dmo.org/id/dataset-parameter/826014.rdf
Name: Sample_ID
Units: unitless
Description: <p>GEOTRACES sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/826015.rdf
Name: Sample_Depth
Units: meters (m)
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/826016.rdf
Name: Vol_Flag
Units: unitless
Description: <p>Volume flag: 1=320-1500L; 2=200-320L; 3=<200L.</p>
http://lod.bco-dmo.org/id/dataset-parameter/826017.rdf
Name: Ac227
Units: disintegrations per minute per cubic meter (dpm/m3)
Description: <p>Actinium-227</p>
http://lod.bco-dmo.org/id/dataset-parameter/826018.rdf
Name: sig_ex227Ac
Units: disintegrations per minute per cubic meter (dpm/m3)
Description: <p>?</p>
http://lod.bco-dmo.org/id/dataset-parameter/826019.rdf
Name: Ac_Flag
Units: unitless
Description: <p>Ac Flag = Calc method: 1=a; 2=b; 3=c; 4=d.</p>
http://lod.bco-dmo.org/id/dataset-parameter/826020.rdf
Name: Excess_227Ac
Units: disintegrations per minute per cubic meter (dpm/m3)
Description: <p>Excess Actinium-227</p>
http://lod.bco-dmo.org/id/dataset-parameter/826021.rdf
Name: sig_ex227Ac_2
Units: disintegrations per minute per cubic meter (dpm/m3)
Description: <p>?</p>
http://lod.bco-dmo.org/id/dataset-parameter/826022.rdf
Name: Excess_Ac_Flag
Units: unitless
Description: <p>Excess Ac Flag: 1=Use meas Pa; 2=estimated Pa.</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
509701
https://datadocs.bco-dmo.org/docs/302/geotraces/GEOTRACES_ARCTIC/hammond/data_docs/BCO-DMO_227Ac_Methods_for_Arctic_Geotraces_GN01.pdf
227Ac Methods for Arctic GEOTRACES
Detailed methods for Arctic GEOTRACES 227Ac dataset contributed by PI D. Hammond.
download
https://osprey.bco-dmo.org/dataset/825984/data/download
download
onLine
dataset
<p>In summary: Filtered water from McLane submersible pumps was passed through acetate filter cartridges impregnated with MnO2. Ac, along with Ra and Th, were sorbed to the cartridges. These were returned to USC and analyzed.</p>
<p>See Methodology Supplemental File (BCO-DMO_227Ac_Methods_for_Arctic_Geotraces_GN01.pdf) for details.</p>
<p>Problem report: Some pump deployments failed to deliver sufficient water (nd).</p>
Specified by the Principal Investigator(s)
<p><strong>BCO-DMO Processing:</strong><br />
- renamed fields to conform with BCO-DMO parameter naming conventions.</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: Instrument Name: McLane Pump Instrument Short Name:McLane Pump Instrument Description: McLane pumps sample large volumes of seawater at depth. They are attached to a wire and lowered to different depths in the ocean. As the water is pumped through the filter, particles suspended in the ocean are collected on the filters. The pumps are then retrieved and the contents of the filters are analyzed in a lab.
RaDeCC
RaDeCC
PI Supplied Instrument Name: RaDeCC PI Supplied Instrument Description:RaDeCC manufactured by Scientific Computing, Inc (Columbia, SC) Instrument Name: Radium Delayed Coincidence Counter Instrument Short Name:RaDeCC Instrument Description: The RaDeCC is an alpha scintillation counter that distinguishes decay events of short-lived radium daughter products based on their contrasting half-lives. This system was pioneered by Giffin et al. (1963) and adapted for radium measurements by Moore and Arnold (1996).
References:
Giffin, C., A. Kaufman, W.S. Broecker (1963). Delayed coincidence counter for the assay of actinon and thoron. J. Geophys. Res., 68, pp. 1749-1757.
Moore, W.S., R. Arnold (1996). Measurement of 223Ra and 224Ra in coastal waters using a delayed coincidence counter. J. Geophys. Res., 101 (1996), pp. 1321-1329.
Charette, Matthew A.; Dulaiova, Henrieta; Gonneea, Meagan E.; Henderson, Paul B.; Moore, Willard S.; Scholten, Jan C.; Pham, M. K. (2012). GEOTRACES radium isotopes interlaboratory comparison experiment. Limnology and Oceanography - Methods, vol 10, pg 451.
Cruise: HLY1502
HLY1502
USCGC Healy
Community Standard Description
International Council for the Exploration of the Sea
USCGC Healy
vessel
HLY1502
David C. Kadko
Florida International University
https://datadocs.bco-dmo.org/docs/302/geotraces/GEOTRACES_ARCTIC/data_docs/cruise_reports/healy1502.pdf
Report describing HLY1502
USCGC Healy
Community Standard Description
International Council for the Exploration of the Sea
USCGC Healy
vessel