http://lod.bco-dmo.org/id/dataset/738307
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
2018-06-08
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
[DEPRECATED] Particulate total mercury and particulate monomethylmercury concentrations from the Western Arctic Ocean, which were sampled by McLane pumps during he 2015 US GEOTRACES Cruise (GN01; HLY1502)
2018-07-10
publication
2018-07-10
revision
BCO-DMO Linked Data URI
2018-07-10
creation
http://lod.bco-dmo.org/id/dataset/738307
Carl Lamborg
University of California-Santa Cruz
principalInvestigator
Chad Hammerschmidt
Wright State 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: Lamborg, C., Hammerschmidt, C. (2018) [DEPRECATED] Particulate total mercury and particulate monomethylmercury concentrations from the Western Arctic Ocean, which were sampled by McLane pumps during he 2015 US GEOTRACES Cruise (GN01; HLY1502). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2018-07-10 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/738307 [access date]
Dataset Description: <p>This dataset includes particulate total mercury and particulate monomethylmercury concentrations from the Western Arctic Ocean, which were sampled as part of the 2015 US GEOTRACES Cruise (GN01; HLY1502). Samples were collected with McLane pumps, size fractionated between 1 and 51 um.</p>
<p><strong>Status note (2020-10-28):</strong>&nbsp;This dataset has been replaced. Use the following dataset instead:&nbsp;<a href="https://www.bco-dmo.org/dataset/827530" target="_blank">https://www.bco-dmo.org/dataset/827530</a></p> Methods and Sampling: <p>Sample collection with in-situ pumps is outlined in Bishop et al. 2012.</p>
<p>Particulate samples were frozen and transported to Wright State University (Dayton, OH) where they were analyzed within 6 months of collection. Filter punches were digested in acid-cleaned polypropylene containers with 8 mL of 2N HNO<sub>3</sub> (Baker Instra-Analyzed).&nbsp; After analysis of MMHg, an aliquot of digestate was oxidized with BrCl solution for total Hg determination, according to Hammerschmidt &amp; Fitzgerald (2006). All analyzes were performed on Tekran Model 2500 CVAFS Mercury Detector.</p>
<p>Particulate HgT analysis was done according to Fitzgerald &amp; Gill (1979), Bloom &amp; Fitzgerald (1988), and Bloom (1989). The method detection limit was 0.75 pmol/kg, and procedural duplicates averaged 7 ± 6 RPD (<em>n</em> = 16).</p>
<p>Particulate MMHg was analyzed according to Tseng et al. (2004). The detection limit for the method was 0.075 pmol/kg.</p>
<p>While at sea, variable gas pressure in the gas chromatograph caused irregular MMHg peak retention times, making it indecipherable from the inorganic Hg peak. Accordingly, seawater samples ranging from 0.25 to 2 L, were acidified to 1% with sulfuric acid and shipped frozen to Wright State University for analysis.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1434650 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1434650
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1434653 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1434653
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1534315 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1534315
onGoing
Carl Lamborg
University of California-Santa Cruz
831-459-2908
A442 Earth & Marine Sciences 1156 High Street
Santa Cruz
CA
95064
USA
clamborg@ucsc.edu
pointOfContact
Chad Hammerschmidt
Wright State University
937-775-3457
3640 Colonel Glenn Highway 272B Brehm Lab
Dayton
OH
45435
USA
chad.hammerschmidt@wright.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
cruise_name
cruise_id
GEOTRC_INSTR
GEOTRC_EVENTNO
STNNBR
CASTNO
ISO_DATETIME_UTC_START_EVENT
ISO_DATETIME_UTC_END_EVENT
Latitude
Longitude
EVENT_LAT
EVENT_LON
GEOTRC_SAMPNO
Depth
Hg_SPT_CONC_PUMP
Hg_SPT_CONC_PUMP_QF
HG_MM_SPT_CONC_PUMP
HG_MM_SPT_CONC_PUMP_QF
comment
Cold Vapor Atomic Fluorescent Spectrometer (CVAFS)
McLane in-situ pump
theme
None, User defined
cruise name
Cruise identfier
instrument
event
station
cast
ISO_DateTime_UTC
latitude
longitude
sample identification
depth
trace metal concentration
quality flag
comments
featureType
BCO-DMO Standard Parameters
Cold Vapor Atomic Fluorescence Spectrophotometer
McLane Pump
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
Collaborative Research: GEOTRACES Arctic Section: Mercury Speciation and Cycling in the Arctic Ocean
https://osprey.bco-dmo.org/project/735823
Collaborative Research: GEOTRACES Arctic Section: Mercury Speciation and Cycling in the Arctic Ocean
<p><em>NSF Award Abstract:</em><br />
In this project, investigators from Woods Hole Oceanographic Institution and Wright State University participating in the 2015 U.S. GEOTRACES Arctic expedition will measure total mercury and mercury species in seawater, particles, sediments, snow and ice samples to better understand its cycling 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. In its methylated form, mercury poses a serious human and ecosystem health threat, and this research will provide important information on the extent and rate of change of mercury in the sensitive Arctic ecosystem. Results from this study will be shared through outreach efforts to middle schools students in the Dayton, Ohio area, and the research will involve training for graduate and undergraduate students.</p>
<p>Mercury is a toxic trace metal that originates from natural and anthropogenic sources, and can enter the oceans through many processes, most importantly atmospheric deposition, riverine discharge, and coastal erosion in the Arctic Ocean. Mercury in the ocean can be transformed into varying species by a variety of abiotic and biotic processes. Its transformation to methylmercury is of primary concern as it can biomagnify in food webs. Wildlife in the Arctic has experienced unprecedented increases of methylmercury in their tissues during the past 200 years. While there has been a great deal of research related to mercury cycling in the Arctic in recent years, there remain large gaps in fundamental understanding, particularly with respect to mercury distributions and speciation. The researchers will 1) measure the concentration of four mercury species in the water column, particles, sediments, snow and sea ice samples, 2) determine the concentration of other related chemical species (thiols and snow/ice bromine), and 3) explore the mercury-related genomics of bacteria in various samples. Results from this work will yield new insights into the extent and rate of change of mercury loadings in the Arctic Ocean.</p>
GEOTRACES Arctic Mercury
largerWorkCitation
project
eng; USA
oceans
Western Arctic Ocean
178.927
11.9102
60.224
89.997
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. Western Arctic Ocean
0
BCO-DMO catalogue of parameters from [DEPRECATED] Particulate total mercury and particulate monomethylmercury concentrations from the Western Arctic Ocean, which were sampled by McLane pumps during he 2015 US GEOTRACES Cruise (GN01; HLY1502)
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/739656.rdf
Name: cruise_name
Units: unitless
Description: <p>Cruise identification</p>
http://lod.bco-dmo.org/id/dataset-parameter/739657.rdf
Name: cruise_id
Units: unitless
Description: <p>Official cruise ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/739658.rdf
Name: GEOTRC_INSTR
Units: unitless
Description: <p>Sampling instrument; joined from event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/739659.rdf
Name: GEOTRC_EVENTNO
Units: unitless
Description: <p>GEOTRACES event number; joined from event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/739660.rdf
Name: STNNBR
Units: unitless
Description: <p>GEOTRACES station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/739661.rdf
Name: CASTNO
Units: unitless
Description: <p>Cast number; joined from event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/739662.rdf
Name: ISO_DATETIME_UTC_START_EVENT
Units: unitless
Description: <p>Date and time, formatted to the ISO 8601 standard, at the start of the sampling event, according to the event log. Format: YYYY-MM-DDTHH:MM:SS[.xx]Z</p>
http://lod.bco-dmo.org/id/dataset-parameter/739663.rdf
Name: ISO_DATETIME_UTC_END_EVENT
Units: unitless
Description: <p>Date and time, formatted to the ISO 8601 standard, at the end of the sampling event, according to the event log. Format: YYYY-MM-DDTHH:MM:SS[.xx]Z</p>
http://lod.bco-dmo.org/id/dataset-parameter/739664.rdf
Name: Latitude
Units: decimal degrees north
Description: <p>Latitude of sample collection; provided by the data contributor</p>
http://lod.bco-dmo.org/id/dataset-parameter/739665.rdf
Name: Longitude
Units: decimal degrees east
Description: <p>Longitude of sample collection; provided by the data contributor</p>
http://lod.bco-dmo.org/id/dataset-parameter/739666.rdf
Name: EVENT_LAT
Units: decimal degrees
Description: <p>Latitude at the start of the event; north is positive; joined from event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/739667.rdf
Name: EVENT_LON
Units: decimal degrees
Description: <p>Longitude at the start of the event; east is positive; joined from event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/739668.rdf
Name: GEOTRC_SAMPNO
Units: unitless
Description: <p>GEOTRACES sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/739669.rdf
Name: Depth
Units: meters (m)
Description: <p>Depth of sample collection; provided by the data contributer</p>
http://lod.bco-dmo.org/id/dataset-parameter/739670.rdf
Name: Hg_SPT_CONC_PUMP
Units: picomoles per kilogram (pmol/kg)
Description: <p>Total mercury measurement</p>
http://lod.bco-dmo.org/id/dataset-parameter/739671.rdf
Name: Hg_SPT_CONC_PUMP_QF
Units: unitless
Description: <p>Total mercury quality flag (WOCE)</p>
http://lod.bco-dmo.org/id/dataset-parameter/739672.rdf
Name: HG_MM_SPT_CONC_PUMP
Units: picomoles per kilogram (pmol/kg)
Description: <p>Monomethylmercury measurement</p>
http://lod.bco-dmo.org/id/dataset-parameter/739673.rdf
Name: HG_MM_SPT_CONC_PUMP_QF
Units: unitless
Description: <p>Monomethylmercury quality flag (WOCE)</p>
http://lod.bco-dmo.org/id/dataset-parameter/739674.rdf
Name: comment
Units: unitless
Description: <p>Comments</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
https://osprey.bco-dmo.org/dataset/738307/data/download
download
onLine
dataset
<p>Sample collection with in-situ pumps is outlined in Bishop et al. 2012.</p>
<p>Particulate samples were frozen and transported to Wright State University (Dayton, OH) where they were analyzed within 6 months of collection. Filter punches were digested in acid-cleaned polypropylene containers with 8 mL of 2N HNO<sub>3</sub> (Baker Instra-Analyzed).&nbsp; After analysis of MMHg, an aliquot of digestate was oxidized with BrCl solution for total Hg determination, according to Hammerschmidt &amp; Fitzgerald (2006). All analyzes were performed on Tekran Model 2500 CVAFS Mercury Detector.</p>
<p>Particulate HgT analysis was done according to Fitzgerald &amp; Gill (1979), Bloom &amp; Fitzgerald (1988), and Bloom (1989). The method detection limit was 0.75 pmol/kg, and procedural duplicates averaged 7 ± 6 RPD (<em>n</em> = 16).</p>
<p>Particulate MMHg was analyzed according to Tseng et al. (2004). The detection limit for the method was 0.075 pmol/kg.</p>
<p>While at sea, variable gas pressure in the gas chromatograph caused irregular MMHg peak retention times, making it indecipherable from the inorganic Hg peak. Accordingly, seawater samples ranging from 0.25 to 2 L, were acidified to 1% with sulfuric acid and shipped frozen to Wright State University for analysis.</p>
Specified by the Principal Investigator(s)
<p><strong>WOCE Quality Flags:</strong><br />
2 – Ok,<br />
3 – Questionable,<br />
4 – Bad Analysis,<br />
5 – Sample lost,<br />
6 – Mean of replicates,<br />
9 – Sample was not collected for Hg analysis.</p>
<p>"nd"&nbsp;indicates no data.<br />
"bdl"&nbsp;indicates below detection limit.</p>
<p><strong>BCO-DMO Processing:</strong><br />
- separated cruise column into two: cruise_name and cruise_id;<br />
- modified parameter names; applied GEOTRACES names provided by submitter;<br />
- corrected HLY cruise ID number (they were incrementing by one for each row). - joined the following columns from HLY1502 event log, based on the GEOTRC_SAMPNO: GETORC_EVENTNO, GEOTRC_INSTR, ISO_DATETIME_UTC_START_EVENT, ISO_DATETIME_UTC_END_EVENT, EVENT_LAT, EVENT_LON, CASTNO.<br />
- 30-Oct-2018: removed embargo on dataset.<br />
- 21-Oct-2019: corrected units of measurement for&nbsp;Hg_SPT_CONC_PUMP and HG_MM_SPT_CONC_PUMP in parameter defintions section of metadata. These were previously labeled as picomolar but values are reported in pmol/kg.</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
Cold Vapor Atomic Fluorescent Spectrometer (CVAFS)
Cold Vapor Atomic Fluorescent Spectrometer (CVAFS)
PI Supplied Instrument Name: Cold Vapor Atomic Fluorescent Spectrometer (CVAFS) PI Supplied Instrument Description:Cold Vapor Atomic Fuorescent Spectrometer (CVAFS) quantitatively measures volatile heavy metals, such as mercury. Gaseous mercury atoms are carried to the detector via inert gas, excited by a UV light source, and radiate the absorbed energy. The fluorescence is detected by either a photomultiplier tube or UV photodiode. Instrument Name: Cold Vapor Atomic Fluorescence Spectrophotometer Instrument Short Name:CVAFS Instrument Description: A Cold Vapor Atomic Fluorescent Spectrophotometer (CVAFS) is an instrument used for quantitative determination of volatile heavy metals, such as mercury. CVAFS make use of the characteristic of mercury that allows vapor measurement at room temperature. Mercury atoms in an inert carrier gas are excited by a collimated UV light source at a particular wavelength. As the atoms return to their non-excited state they re-radiate their absorbed energy at the same wavelength. The fluorescence may be detected using a photomultiplier tube or UV photodiode.
McLane in-situ pump
McLane in-situ pump
PI Supplied Instrument Name: McLane in-situ pump PI Supplied Instrument Description:McLane in-situ pumps were used to collect the 1–51 μm size fractioned samples. 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.
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