http://lod.bco-dmo.org/id/dataset/809612
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
2020-04-17
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Depth profiles of the isotopic composition (d30Si) of silicon within dissolved silicic acid on the US GEOTRACES Arctic cruise GN01 (HLY1502) from August to October 2015
2020-04-17
publication
2020-04-17
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-04-20
publication
https://doi.org/10.26008/1912/bco-dmo.809612.1
Mark A. Brzezinski
University of California-Santa Barbara
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: Brzezinski, M. (2020) Depth profiles of the isotopic composition (d30Si) of silicon within dissolved silicic acid on the US GEOTRACES Arctic cruise GN01 (HLY1502) from August to October 2015. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-04-17 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.809612.1 [access date]
Depth profiles of the isotopic composition (d30Si) of silicon within dissolved silicic acid on the US GEOTRACES Arctic cruise GN01 (HLY1502) from August to October 2015 Dataset Description: Methods and Sampling: <p>Samples collected from Niskin bottles using the GEOTRACES ODF CTD-rosette system. (Note on niskin trip depths reported in dataset: multiple bottles were tripped to collect sample water; these samples were linked to the Niskin number having both oxygen and salinity bottle data.)</p>
<p>Seawater samples for δ30Si measurements were collected using a Oceanographic Data Facilitiy’s (ODF, Scripps Institution of Oceanography) CTD-rosette mounted with Niskin samplers and a Sea-Bird Electronics CTD (SBE9plus). Seawater was gravity filtered into polypropylene containers through in-line Supor filter capsules (0.8/0.45 µm) attached directly to each Niskin bottle. Sample bottles were capped and stored without preservative in the dark.</p>
<p>Back in the laboratory, the silicon from seawater was precipitated of as trimethylamine silicomolybdate using a high purity triethlyamine ammonium molybdate solution (TEA-Moly). The precipitate was isolated by filtration onto a polycarbonate filter and purified by high temperature combustion to produce solid silicon dioxide. SiO2 was then converted to solid Cs2SiF6 by dissolution in HF and addition of CsCl. The Cs2SiF6 was rinsed with ethanol, dried and dissolved in high purity (&gt;18MΩ) water. BaSiF6 was precipitated by the addition of BaCl, rinsed with ethanol and dried.</p>
<p>Isotopic ratio analysis was performed using a Nu Perspective isotope ratio mass spectrometer equipped with a Nu Sil inlet system. Samples as BaSiF6 are loaded into sample vials that are placed in a sample carousel in the Nu Sil. Samples are sequentially heated to 590°C.</p>
<p>Isotope delta values are normalized against the international standard NBS28.</p>
<p>For more information, see the Protocol document&nbsp;(under Supplemental Files).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1434305 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1434305
completed
Mark A. Brzezinski
University of California-Santa Barbara
805-893-7061
UCSB Marine Science Institute Bldg 520 Rm 4002 Fl 4L
Santa Barbara
CA
93106
USA
mark.brzezinski@lifesci.ucsb.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
SILICATE_30_28_D_DELTA_BOTTLE_5ib7da
SD1_SILICATE_30_28_D_DELTA_BOTTLE_5ib7da
Flag_SILICATE_30_28_D_DELTA_BOTTLE_5ib7da
SBE9plus
Nu Perspective isotope ratio mass spectrometer
theme
None, User defined
station
date
time of day
ISO_DateTime_UTC
latitude
longitude
event
sample identification
depth
Silicon
quality flag
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird
Isotope-ratio Mass Spectrometer
Niskin bottle
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: Diagnosing the unique silicon isotope composition of the Arctic Ocean
https://osprey.bco-dmo.org/project/809608
GEOTRACES Arctic Section: Diagnosing the unique silicon isotope composition of the Arctic Ocean
<p><em>NSF Award Abstract:</em><br />
An investigator will participate in the 2015 U.S. GEOTRACES Arctic Ocean expedition and measure silicon isotopes composition of silicic acid in seawater samples, as well as diatoms and sea ice. 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. As silicon is a key component of diatom shells, the measurement of their concentrations in this study can provide an important indicator of primary productivity, both in the present day, as well as past oceans. The project will provide training for undergraduate students and a post-doctoral researcher in silicon chemistry, as well as include outreach to K-12 students.</p>
<p>The silicon isotope proxy is increasingly being used to assess the role of diatoms and silicic acid supply to past shifts in ocean productivity and their role in Earth's climate. Application of the proxy requires knowledge of the silicon isotopic composition of ventilating water masses. Uncertainty in these values translates directly into uncertainty in the level of productivity implied by the proxy. The growing global data set of silicon isotopes in marine waters suggest that silicon isotopes in subsurface waters are not uniform, but vary systematically driven by interactions between silicon isotope fractionation, the biological pump and thermohaline circulation. In addition, significant anomalies exist between model predictions and observations. In this study, researchers will test hypotheses regarding the origin of this signal and the mechanisms controlling silicon isotope distributions within the Arctic Ocean by greatly expanding the silicon isotope data set for this region. The overarching hypothesis to be tested is that silicon isotope distributions are controlled by the coupling of silicon fractionation during silica production and during silica dissolution to the biological pump and to the meridional overturning circulation.</p>
GEOTRACES Arctic Si Isotopes
largerWorkCitation
project
eng; USA
oceans
Western Arctic Ocean
-179.8086
179.3519
65.8093
89.9876
2015-08-16
2015-10-07
Arctic Ocean; Sailing from Dutch Harbor to Dutch Harbor (GN01)
0
BCO-DMO catalogue of parameters from Depth profiles of the isotopic composition (d30Si) of silicon within dissolved silicic acid on the US GEOTRACES Arctic cruise GN01 (HLY1502) 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/809625.rdf
Name: Station_ID
Units: unitless
Description: <p>Sampling station</p>
http://lod.bco-dmo.org/id/dataset-parameter/809626.rdf
Name: Start_Date_UTC
Units: unitless
Description: <p>CTD start date (UTC); format: yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/809627.rdf
Name: Start_Time_UTC
Units: unitless
Description: <p>CTD start time (UTC); format: HH:MM</p>
http://lod.bco-dmo.org/id/dataset-parameter/809628.rdf
Name: Start_ISO_DateTime_UTC
Units: unitless
Description: <p>CTD start date and time (UTC) in ISO8601 format: yyyy-mm-ddTHH:MMZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/809629.rdf
Name: End_Date_UTC
Units: unitless
Description: <p>CTD end date (UTC); format: yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/809630.rdf
Name: End_Time_UTC
Units: unitless
Description: <p>CTD end time (UTC); format: HH:MM</p>
http://lod.bco-dmo.org/id/dataset-parameter/809631.rdf
Name: End_ISO_DateTime_UTC
Units: unitless
Description: <p>CTD end date and time (UTC) in ISO8601 format: yyyy-mm-ddTHH:MMZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/809632.rdf
Name: Start_Latitude
Units: decimal degrees
Description: <p>CTD start latitude in decimal degrees</p>
http://lod.bco-dmo.org/id/dataset-parameter/809633.rdf
Name: Start_Longitude
Units: decimal degrees
Description: <p>CTD start longitude in decimal degrees</p>
http://lod.bco-dmo.org/id/dataset-parameter/809634.rdf
Name: End_Latitude
Units: decimal degrees
Description: <p>CTD end latitude in decimal degrees</p>
http://lod.bco-dmo.org/id/dataset-parameter/809635.rdf
Name: End_Longitude
Units: decimal degrees
Description: <p>CTD end longitude in decimal degrees</p>
http://lod.bco-dmo.org/id/dataset-parameter/809636.rdf
Name: Event_ID
Units: unitless
Description: <p>Geotraces event number</p>
http://lod.bco-dmo.org/id/dataset-parameter/809637.rdf
Name: Sample_ID
Units: unitless
Description: <p>Geotraces sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/809638.rdf
Name: Sample_Depth
Units: meters (m)
Description: <p>Niskin trip depth. Multiple bottles were tripped to collect sample water; our samples were linked to the Niskin number having both oxygen and salinity bottle data.</p>
http://lod.bco-dmo.org/id/dataset-parameter/809639.rdf
Name: SILICATE_30_28_D_DELTA_BOTTLE_5ib7da
Units: per mil
Description: <p>mean delta30Si(OH)4 relative to the NBS28 standard</p>
http://lod.bco-dmo.org/id/dataset-parameter/809640.rdf
Name: SD1_SILICATE_30_28_D_DELTA_BOTTLE_5ib7da
Units: per mil
Description: <p>std dev delta30Si(OH)4 relative to the NBS28 standard</p>
http://lod.bco-dmo.org/id/dataset-parameter/809641.rdf
Name: Flag_SILICATE_30_28_D_DELTA_BOTTLE_5ib7da
Units: unitless
Description: <p>quality flag for SILICATE_30_28_D_DELTA_BOTTLE_5ib7da: 1 Good = Passed documented required QC tests; 2 = Not evaluated, not available or unknown: Used for data when no QC test performed or the information on quality is not available; 3 = Questionable/suspect: Failed non-critical documented metric or subjective test(s); 4 = Bad: Failed critical documented QC test(s) or as assigned by the data provider; 9 = Missing data: Used as place holder when data are missing.</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
33755
https://darchive.mblwhoilibrary.org/bitstream/1912/25658/1/dataset-809612_gn01-silicon-stable-isotopes__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.809612.1
download
onLine
dataset
<p>Samples collected from Niskin bottles using the GEOTRACES ODF CTD-rosette system. (Note on niskin trip depths reported in dataset: multiple bottles were tripped to collect sample water; these samples were linked to the Niskin number having both oxygen and salinity bottle data.)</p>
<p>Seawater samples for δ30Si measurements were collected using a Oceanographic Data Facilitiy’s (ODF, Scripps Institution of Oceanography) CTD-rosette mounted with Niskin samplers and a Sea-Bird Electronics CTD (SBE9plus). Seawater was gravity filtered into polypropylene containers through in-line Supor filter capsules (0.8/0.45 µm) attached directly to each Niskin bottle. Sample bottles were capped and stored without preservative in the dark.</p>
<p>Back in the laboratory, the silicon from seawater was precipitated of as trimethylamine silicomolybdate using a high purity triethlyamine ammonium molybdate solution (TEA-Moly). The precipitate was isolated by filtration onto a polycarbonate filter and purified by high temperature combustion to produce solid silicon dioxide. SiO2 was then converted to solid Cs2SiF6 by dissolution in HF and addition of CsCl. The Cs2SiF6 was rinsed with ethanol, dried and dissolved in high purity (&gt;18MΩ) water. BaSiF6 was precipitated by the addition of BaCl, rinsed with ethanol and dried.</p>
<p>Isotopic ratio analysis was performed using a Nu Perspective isotope ratio mass spectrometer equipped with a Nu Sil inlet system. Samples as BaSiF6 are loaded into sample vials that are placed in a sample carousel in the Nu Sil. Samples are sequentially heated to 590°C.</p>
<p>Isotope delta values are normalized against the international standard NBS28.</p>
<p>For more information, see the Protocol document&nbsp;(under Supplemental Files).</p>
Specified by the Principal Investigator(s)
<p>Data are flagged with the following quality flags:<br />
1 Good =&nbsp; Passed documented required QC tests;<br />
2 = Not evaluated, not available or unknown: Used for data when no QC test performed or the information on quality is not available;<br />
3 = Questionable/suspect: Failed non-critical documented metric or subjective test(s);<br />
4 = Bad: Failed critical documented QC test(s) or as assigned by the data provider;<br />
9 = Missing data: Used as place holder when data are missing.</p>
<p><strong>BCO-DMO Processing:</strong><br />
- modified parameter names;<br />
- formatted dates to yyyy-mm-dd and times to HH:MM;<br />
- added date/time fields in ISO 8601 format.</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
SBE9plus
SBE9plus
PI Supplied Instrument Name: SBE9plus PI Supplied Instrument Description:Seawater samples for δ30Si measurements were collected using a Oceanographic Data Facilitiy’s (ODF, Scripps Institution of Oceanography) CTD-rosette mounted with Niskin samplers and a Sea-Bird Electronics CTD (SBE9plus). Instrument Name: CTD Sea-Bird Instrument Short Name:CTD Sea-Bird Instrument Description: A Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics. This instrument designation is used when specific make and model are not known or when a more specific term is not available in the BCO-DMO vocabulary. Refer to the dataset-specific metadata for more information about the specific CTD used. More information from: http://www.seabird.com/ Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/130/
Nu Perspective isotope ratio mass spectrometer
Nu Perspective isotope ratio mass spectrometer
PI Supplied Instrument Name: Nu Perspective isotope ratio mass spectrometer PI Supplied Instrument Description:Isotopic ratio analysis was performed using a Nu Perspective isotope ratio mass spectrometer equipped with a Nu Sil inlet system. Instrument Name: Isotope-ratio Mass Spectrometer Instrument Short Name:IR Mass Spec; IRMS Instrument Description: The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/
PI Supplied Instrument Name: PI Supplied Instrument Description:Samples were collected from Niskin bottles using the GEOTRACES ODF CTD-rosette system. 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: 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