Mercury and methylmercury in wet deposition samples from USCGC Healy HLY1502 in the Canada and Makarov Basins of the Arctic Ocean; Dutch Harbor to Dutch Harbor from August to October 2015 (NCEI Accession 0278543)
This dataset contains chemical and physical data collected on USCGC Healy during cruise HLY1502 in the Arctic Ocean, Bering Sea, and East Siberian Sea from 2015-08-12 to 2015-10-10. These data include trace metal concentration. The instruments used to collect these data include Automated Mercury Analysis System, Cold Vapor Atomic Fluorescence Spectrophotometer, and Precipitation Sampler. These data were collected by Robert Mason of University of Connecticut as part of the "Collaborative Research: GEOTRACES Arctic Section: Determination of atmospheric wet and dry deposition and air-sea exchange of mercury species from coastal and offshore waters (GEOTRACES Arctic Atmos Hg)" and "U.S. Arctic GEOTRACES Study (U.S. GEOTRACES Arctic)" projects and "U.S. GEOTRACES (U.S. GEOTRACES)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2021-02-19.
The following is the text of the dataset description provided by BCO-DMO:
Mercury and methylmercury concentrations in wet deposition
Dataset Description:
The data include measurements of mercury and methylmercury concentrations in wet deposition samples from the GEOTRACES Arctic Ocean cruise in 2015 (HLY1502, GN01).
The following is the text of the dataset description provided by BCO-DMO:
Mercury and methylmercury concentrations in wet deposition
Dataset Description:
The data include measurements of mercury and methylmercury concentrations in wet deposition samples from the GEOTRACES Arctic Ocean cruise in 2015 (HLY1502, GN01).
Dataset Citation
- Cite as: Mason, Robert P. (2023). Mercury and methylmercury in wet deposition samples from USCGC Healy HLY1502 in the Canada and Makarov Basins of the Arctic Ocean; Dutch Harbor to Dutch Harbor from August to October 2015 (NCEI Accession 0278543). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0278543. Accessed [date].
Dataset Identifiers
ISO 19115-2 Metadata
gov.noaa.nodc:0278543
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
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NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov |
Dataset Point of Contact |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Time Period | 2015-08-12 to 2015-10-10 |
Spatial Bounding Box Coordinates |
West: 148.85
East: -179.29
South: 60.18
North: 89.07
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Dataset Progress Status | Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility |
Data Update Frequency | As needed |
Supplemental Information | Acquisition Description: Methodology: 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 & Mason (2014). See "Related Publications" below for complete citations. Sampling Procedures: An automated N-CON rain sampler (designated for Hg analysis) was used to collect rain (falling snow was not collected for Hg analysis) during the cruise. It was operated to avoid contamination from the ship and sea spray. Low rainfall warranted ultra high purity water rinses of the collection funnel in all but one sample, with the rinse and sample combined and recovered for analysis. Two deployment blanks were also collected. After collection, precipitation samples were stored in Teflon FEP bottles. All samples were kept frozen at -20 °C in the dark, and were transported back to the University of Connecticut for analysis. 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. |
Purpose | This dataset is available to the public for a wide variety of uses including scientific research and analysis. |
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Last Modified: 2024-05-31T15:15:28Z
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov