http://lod.bco-dmo.org/id/dataset/779280
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
2019-10-16
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Mercury and methylmercury concentrations in melt pond water from samples collected during the GEOTRACES Arctic Ocean cruise in 2015 (HLY1502, GN01).
2021-01-25
publication
2021-01-25
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2021-02-19
publication
https://doi.org/10.26008/1912/bco-dmo.779280.1
Robert P. Mason
University of Connecticut
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: Mason, R. (2021) Mercury and methylmercury concentrations in melt pond water from samples collected during the GEOTRACES Arctic Ocean cruise in 2015 (HLY1502, GN01). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-01-25 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.779280.1 [access date]
Mercury and methylmercury concentrations in melt pond water Dataset Description: <p>The data include measurements of mercury and methylmercury concentrations in melt pond water from the GEOTRACES Arctic Ocean cruise in 2015 (HLY1502, GN01).</p> Methods and Sampling: <p><strong>Methodology:</strong> Details of the methods for the cruise are given in DiMento et al. (2019). Details of the overall method and approach for dissolved gaseous mercury and atmospheric mercury methods are given in Andersson et al. (2008), Mason et al. (2017), Soerensen et al. (2014), and Soerensen et al. (2013). Analytical methods are detailed in DiMento et al. (2019) with additional information in the papers listed above and in Munson et al. (2014), Morton et al. (2013), and Gichuki &amp; Mason (2014). See "Related Publications" below for complete citations.</p>
<p><strong>Sampling Procedures:</strong> Melt pond water samples were collected using a battery powered peristaltic pump (Pegasus Alexis) to fill acid-washed 20 L carboys (low density polyethylene – LDPE) through C-Flex tubing (Masterflex) that had been acid-cleaned with 0.1 M ultrapure HCl and thoroughly rinsed with ultrapure water before use (Marsay et al., 2018). At each melt pond, the tubing was used as a probe to ascertain that the pond did indeed have a bottom layer of ice, although it was not possible to determine any connectivity with seawater through flaws in the ice, or the presence of a "false bottom" formed from refreezing of fresh meltwater. Samples for TE analysis were also collected from snow, sea ice, and from seawater beneath the sea ice at each station. Snow samples for TE analysis were collected using an acid-cleaned polyethylene shovel to transfer the snow column into an acid-cleaned LDPE drum insert (CDF Corporation), which was held inside a plastic bucket, and which was subsequently sealed before transfer to the ship. The sample was allowed to melt at room temperature on the ship (8–10 h), and then homogenized by gentle shaking (Marsay et al., 2018).</p>
<p>Methylmercury concentrations were determined following the ascorbic acid-assisted direct ethylation method (Munson et al., 2014) using a Tekran 2700 instrument and autosampler to automate the purging, trapping, and detection via cold vapor atomic fluorescence spectroscopy (CVAFS). Samples were thawed then acidified to 1% (v/v) H2SO4 and left to digest overnight before neutralizing with 8N potassium hydroxide (KOH), buffering with 4M acetate, adding 2.5% (w/v) ascorbic acid and finally 1% (w/v) sodium tetraethyl borate (NaTEB) to ethylate the methylmercury. Total mercury concentrations were determined by dual gold-amalgamation CVAFS utilizing a Tekran 2600 instrument in accordance with U.S. EPA Method 1631. Briefly, waters were digested with bromine monochloride (BrCl) followed by a pre-reduction step with hydroxylamine hydrochloride (NH₂OH·HCl). Inorganic Hg(II) was then reduced to Hg⁰ using stannous chloride (SnCl₂) prior to automated analysis on the Tekran.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1434998 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1434998
completed
Robert P. Mason
University of Connecticut
860-405-9129
Department of Marine Sciences
Groton
CT
06340
USA
Robert.mason@uconn.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Station_ID
Event_ID
Sample_ID
Latitude
Longitude
Date
Time
ISO_DateTime_UTC
Hg_Me_D_CONC_MELTPOND_PUMP_nh4coc
Hg_T_CONC_MELTPOND_PUMP_87d1rb
Tekran 2600; Tekran 2700
Tekran 2537B mercury analyzer
peristaltic pump
theme
None, User defined
station
event
sample identification
latitude
longitude
date
time of day
ISO_DateTime_UTC
trace metal concentration
featureType
BCO-DMO Standard Parameters
Automated Mercury Analysis System
Cold Vapor Atomic Fluorescence Spectrophotometer
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: Determination of atmospheric wet and dry deposition and air-sea exchange of mercury species from coastal and offshore waters
https://osprey.bco-dmo.org/project/779121
Collaborative Research: GEOTRACES Arctic Section: Determination of atmospheric wet and dry deposition and air-sea exchange of mercury species from coastal and offshore waters
<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 concentrations of atmospherically-derived mercury 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. Mercury, primarily as methylmercury, is an element that substantially bioaccumulates through aquatic food webs and impacts neurological functions in humans and wildlife, and it is therefore critical to understand the inputs of mercury to the region. Educational activities as part of this study include training and mentoring of undergraduate and graduate students and a postdoctoral researcher. Researchers will also conduct public outreach activities about mercury impacts to local Arctic communities.</p>
<p>In the Arctic Ocean, subsistence local fishermen and several species of Arctic wildlife, such as beluga whales, seals and polar bears, commonly have elevated levels of methylmercury in their system. Atmospheric deposition is the major pathway of mercury input to the marine environment as both wet and dry (aerosol and gaseous ionic mercury) deposition. Therefore, measurements of mercury and a better understanding of its cycling in the Arctic Ocean are critical. This study will provide further understanding of the drivers of mercury speciation in air and surface waters, including snow/ice, melt ponds, and surface seawater and how these concentrations, and other physical and biological factors, impact deposition rates at the air-sea interface. The primary measurements to be made include a baseline of mercury measurements over the open water from the ship, and over sea-ice environments of the Arctic Ocean, which will be compared to simultaneous and historic coastal measurements, as well as model studies. Overall, results will provide the crucial data and information necessary to comprehend the role of human activity and climate change in exacerbating or ameliorating the exposure of humans and wildlife to methylmercury in the Arctic Ocean.</p>
GEOTRACES Arctic Atmos Hg
largerWorkCitation
project
eng; USA
oceans
Western Arctic Ocean
-176.761
-148.894
82.5039
89.9903
2015-09-11
2015-09-14
Arctic Ocean; Sailing from Dutch Harbor to Dutch Harbor (GN01)
0
BCO-DMO catalogue of parameters from Mercury and methylmercury concentrations in melt pond water from samples collected during the GEOTRACES Arctic Ocean cruise in 2015 (HLY1502, GN01).
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/780863.rdf
Name: Station_ID
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/780864.rdf
Name: Event_ID
Units: unitless
Description: <p>GEOTRACES event number</p>
http://lod.bco-dmo.org/id/dataset-parameter/780865.rdf
Name: Sample_ID
Units: unitless
Description: <p>GEOTRACES sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/780866.rdf
Name: Latitude
Units: decimal degrees
Description: <p>Latitude; positive values = North</p>
http://lod.bco-dmo.org/id/dataset-parameter/780867.rdf
Name: Longitude
Units: decimal degrees
Description: <p>Longitude; positive values = East</p>
http://lod.bco-dmo.org/id/dataset-parameter/780868.rdf
Name: Date
Units: unitless
Description: <p>Date; format: yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/780869.rdf
Name: Time
Units: unitless
Description: <p>Time; format: HH:MM</p>
http://lod.bco-dmo.org/id/dataset-parameter/780870.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) formatted to ISO8601 standard; format: yyyy-mm-ddTHH:MM</p>
http://lod.bco-dmo.org/id/dataset-parameter/780871.rdf
Name: Hg_Me_D_CONC_MELTPOND_PUMP_nh4coc
Units: picomolar (pM)
Description: <p>methylmercury concentration in melt pond water sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/780872.rdf
Name: Hg_T_CONC_MELTPOND_PUMP_87d1rb
Units: picomolar (pM)
Description: <p>total mercury concentration in melt pond water samples</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
529
https://darchive.mblwhoilibrary.org/bitstream/1912/26715/1/dataset-779280_gn01-melt-pond-mercury__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.779280.1
download
onLine
dataset
<p><strong>Methodology:</strong> Details of the methods for the cruise are given in DiMento et al. (2019). Details of the overall method and approach for dissolved gaseous mercury and atmospheric mercury methods are given in Andersson et al. (2008), Mason et al. (2017), Soerensen et al. (2014), and Soerensen et al. (2013). Analytical methods are detailed in DiMento et al. (2019) with additional information in the papers listed above and in Munson et al. (2014), Morton et al. (2013), and Gichuki &amp; Mason (2014). See "Related Publications" below for complete citations.</p>
<p><strong>Sampling Procedures:</strong> Melt pond water samples were collected using a battery powered peristaltic pump (Pegasus Alexis) to fill acid-washed 20 L carboys (low density polyethylene – LDPE) through C-Flex tubing (Masterflex) that had been acid-cleaned with 0.1 M ultrapure HCl and thoroughly rinsed with ultrapure water before use (Marsay et al., 2018). At each melt pond, the tubing was used as a probe to ascertain that the pond did indeed have a bottom layer of ice, although it was not possible to determine any connectivity with seawater through flaws in the ice, or the presence of a "false bottom" formed from refreezing of fresh meltwater. Samples for TE analysis were also collected from snow, sea ice, and from seawater beneath the sea ice at each station. Snow samples for TE analysis were collected using an acid-cleaned polyethylene shovel to transfer the snow column into an acid-cleaned LDPE drum insert (CDF Corporation), which was held inside a plastic bucket, and which was subsequently sealed before transfer to the ship. The sample was allowed to melt at room temperature on the ship (8–10 h), and then homogenized by gentle shaking (Marsay et al., 2018).</p>
<p>Methylmercury concentrations were determined following the ascorbic acid-assisted direct ethylation method (Munson et al., 2014) using a Tekran 2700 instrument and autosampler to automate the purging, trapping, and detection via cold vapor atomic fluorescence spectroscopy (CVAFS). Samples were thawed then acidified to 1% (v/v) H2SO4 and left to digest overnight before neutralizing with 8N potassium hydroxide (KOH), buffering with 4M acetate, adding 2.5% (w/v) ascorbic acid and finally 1% (w/v) sodium tetraethyl borate (NaTEB) to ethylate the methylmercury. Total mercury concentrations were determined by dual gold-amalgamation CVAFS utilizing a Tekran 2600 instrument in accordance with U.S. EPA Method 1631. Briefly, waters were digested with bromine monochloride (BrCl) followed by a pre-reduction step with hydroxylamine hydrochloride (NH₂OH·HCl). Inorganic Hg(II) was then reduced to Hg⁰ using stannous chloride (SnCl₂) prior to automated analysis on the Tekran.</p>
Specified by the Principal Investigator(s)
<p><strong>QA/QC:</strong> Funnel rinse blanks and distilled water blanks were analyzed for total mercury and methylmercury to assess the blanks. Concentrations were based on a standard calibration curve and verified using standard addition techniques. Methylmercury concentrations were determined following the ascorbic cid-assisted direct ethylation method (Munson et al., 2014) using a Tekran 2700 instrument and autosampler to automate the purging, trapping, and detection via cold vapor atomic fluorescence spectroscopy (CVAFS). Sample concentrations were corrected (for matrix spike recoveries, which averaged 82%) with a typical relative standard deviation (RSD) of 10%. Average method detection limits (MDL) were &lt;10 fM. For total mercury, matrix spike recoveries averaged 98 ± 9%, and the MDL was 0.25 pM. Method detection limits for aerosols were about 0.1 pg m-3 for total mercury and 2 fg m-3 for methylmercury, based on the average volume of air filtered and the volume of digest analyzed.</p>
<p>BCO-DMO Processing:<br />
- modified parameter names to conform with BCO-DMO and GEOTRACES naming conventions;<br />
- formatted dates to yyyy-mm-dd;<br />
- added date-time column in ISO8601 format;<br />
- filled blanks with "nd" (no data);<br />
- 2021-01-25: renamed fields with the GEOTRACES DOoR barcodes.</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
Tekran 2600; Tekran 2700
Tekran 2600; Tekran 2700
PI Supplied Instrument Name: Tekran 2600; Tekran 2700 PI Supplied Instrument Description:Tekran 2600 automated sampler for total mercury and Tekran 2700 automated sampler for methylmercury Instrument Name: Automated Mercury Analysis System Instrument Short Name: Instrument Description: Examples include Tekran Models 2600 and 2700
Tekran 2537B mercury analyzer
Tekran 2537B mercury analyzer
PI Supplied Instrument Name: Tekran 2537B mercury analyzer 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.
peristaltic pump
peristaltic pump
PI Supplied Instrument Name: peristaltic pump Instrument Name: Pump Instrument Short Name: Instrument Description: A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps
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