Transport and deposition of heavy metals in the Ross Sea Region, Antarctica
© 2015. American Geophysical Union. All Rights Reserved. Emissions and long-range transport of toxic metals and metalloids pose a global threat to ecosystems and human health. Global industrialization occurring from the late nineteenth century releases large quantities of pollutants into the Earth&#...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Wiley-Blackwell Publishing
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/58288 |
| _version_ | 1848760222112284672 |
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| author | Tuohy, A. Bertler, N. Neff, P. Edwards, Peter Emanuelsson, D. Beers, T. Mayewski, P. |
| author_facet | Tuohy, A. Bertler, N. Neff, P. Edwards, Peter Emanuelsson, D. Beers, T. Mayewski, P. |
| author_sort | Tuohy, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2015. American Geophysical Union. All Rights Reserved. Emissions and long-range transport of toxic metals and metalloids pose a global threat to ecosystems and human health. Global industrialization occurring from the late nineteenth century releases large quantities of pollutants into the Earth's atmosphere. Despite international efforts to mitigate emissions, accumulation of metals is still observed in the most remote regions of the planet. New baseline studies are needed to determine (i) natural background concentration of pollutants, (ii) contributions of anthropogenic emissions, and (iii) potential remobilization of previously deposited metals. Constructing such records requires distinguishing source strength from transport efficiency to the recording site and accounting for local depositional effects. Here we investigate the sensitivity and representation of Southern Hemisphere atmospheric concentrations of heavy metals (Fe, Al, Mn, Pb, Tl, and As) in the Roosevelt Island Climate Evolution (RICE) ice core, a new coastal Antarctic ice core site. Concentration variability with precipitation is explored in daily surface snow samples collected over 70 days, while seasonal deposition is investigated through snow pit sampling. We find that snow sample concentrations increase with particular snow precipitation types (rime and fog) and enhanced meridional atmospheric transport to the site. Snow pit heavy metals peak in summer and also show variable intraannual peaks. Seasonal airmass modeling based on ERA Interim reanalysis data indicates a synoptic shift during the spring and summer months. We conclude that modern heavy metal concentrations are influenced by transport efficiency and scavenging behavior; and thus, time series records from RICE have the potential to provide representative data of regional changes in heavy metals. |
| first_indexed | 2025-11-14T10:12:20Z |
| format | Journal Article |
| id | curtin-20.500.11937-58288 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:12:20Z |
| publishDate | 2015 |
| publisher | Wiley-Blackwell Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-582882017-11-24T05:45:56Z Transport and deposition of heavy metals in the Ross Sea Region, Antarctica Tuohy, A. Bertler, N. Neff, P. Edwards, Peter Emanuelsson, D. Beers, T. Mayewski, P. © 2015. American Geophysical Union. All Rights Reserved. Emissions and long-range transport of toxic metals and metalloids pose a global threat to ecosystems and human health. Global industrialization occurring from the late nineteenth century releases large quantities of pollutants into the Earth's atmosphere. Despite international efforts to mitigate emissions, accumulation of metals is still observed in the most remote regions of the planet. New baseline studies are needed to determine (i) natural background concentration of pollutants, (ii) contributions of anthropogenic emissions, and (iii) potential remobilization of previously deposited metals. Constructing such records requires distinguishing source strength from transport efficiency to the recording site and accounting for local depositional effects. Here we investigate the sensitivity and representation of Southern Hemisphere atmospheric concentrations of heavy metals (Fe, Al, Mn, Pb, Tl, and As) in the Roosevelt Island Climate Evolution (RICE) ice core, a new coastal Antarctic ice core site. Concentration variability with precipitation is explored in daily surface snow samples collected over 70 days, while seasonal deposition is investigated through snow pit sampling. We find that snow sample concentrations increase with particular snow precipitation types (rime and fog) and enhanced meridional atmospheric transport to the site. Snow pit heavy metals peak in summer and also show variable intraannual peaks. Seasonal airmass modeling based on ERA Interim reanalysis data indicates a synoptic shift during the spring and summer months. We conclude that modern heavy metal concentrations are influenced by transport efficiency and scavenging behavior; and thus, time series records from RICE have the potential to provide representative data of regional changes in heavy metals. 2015 Journal Article http://hdl.handle.net/20.500.11937/58288 10.1002/2015JD023293 Wiley-Blackwell Publishing restricted |
| spellingShingle | Tuohy, A. Bertler, N. Neff, P. Edwards, Peter Emanuelsson, D. Beers, T. Mayewski, P. Transport and deposition of heavy metals in the Ross Sea Region, Antarctica |
| title | Transport and deposition of heavy metals in the Ross Sea Region, Antarctica |
| title_full | Transport and deposition of heavy metals in the Ross Sea Region, Antarctica |
| title_fullStr | Transport and deposition of heavy metals in the Ross Sea Region, Antarctica |
| title_full_unstemmed | Transport and deposition of heavy metals in the Ross Sea Region, Antarctica |
| title_short | Transport and deposition of heavy metals in the Ross Sea Region, Antarctica |
| title_sort | transport and deposition of heavy metals in the ross sea region, antarctica |
| url | http://hdl.handle.net/20.500.11937/58288 |