Airborne mercury species at the Råö background monitoring site in Sweden: distribution of mercury as an effect of long-range transport
Within the EU-funded project, Global Mercury Observation System (GMOS) airborne mercury has been monitored at the background Råö measurement site on the western coast of Sweden from mid-May 2012 to the beginning of July 2013 and from the beginning of February 2014 to the end of May 2015. The fol...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2016-10-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/16/13379/2016/acp-16-13379-2016.pdf |
| _version_ | 1811317024836550656 |
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| author | I. Wängberg M. G. Nerentorp Mastromonaco J. Munthe K. Gårdfeldt |
| author_facet | I. Wängberg M. G. Nerentorp Mastromonaco J. Munthe K. Gårdfeldt |
| author_sort | I. Wängberg |
| collection | DOAJ |
| description | Within the EU-funded project, Global Mercury Observation System (GMOS)
airborne mercury has been monitored at the background Råö measurement
site on the western coast of Sweden from mid-May 2012 to the beginning of
July 2013 and from the beginning of February 2014 to the end of May 2015. The
following mercury species/fractions were measured: gaseous elemental mercury
(GEM), particulate bound mercury (PBM) and gaseous oxidised mercury (GOM)
using the Tekran measurement system. The mercury concentrations measured at
the Råö site were found to be low in comparison to other, comparable,
European measurement sites. A back-trajectory analysis to study the origin of
air masses reaching the Råö site was performed. Due to the remote
location of the Råö measurement station it receives background air
about 60 % of the time. However, elevated mercury concentrations arriving
with air masses coming from the south-east are noticeable. GEM and PBM
concentrations show a clear annual variation with the highest values
occurring during winter, whereas the highest concentrations of GOM were
obtained in spring and summer. An evaluation of the diurnal pattern of GOM,
with peak concentrations at midday or in the early afternoon, which often is
observed at remote places, shows that it is likely to be driven by local
meteorology in a similar way to ozone. Evidence that a significant part of
the GOM measured at the Råö site has been formed in free tropospheric
air is presented. |
| first_indexed | 2024-04-13T11:59:31Z |
| format | Article |
| id | doaj.art-b221e216fa7f4ce484b76d63e03d9586 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-13T11:59:31Z |
| publishDate | 2016-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-b221e216fa7f4ce484b76d63e03d95862022-12-22T02:47:49ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242016-10-0116133791338710.5194/acp-16-13379-2016Airborne mercury species at the Råö background monitoring site in Sweden: distribution of mercury as an effect of long-range transportI. Wängberg0M. G. Nerentorp Mastromonaco1J. Munthe2K. Gårdfeldt3IVL Swedish Environmental Research Institute, Gothenburg, 41133, SwedenDepartment of Chemistry and Chemical engineering, Chalmers University of Technology, Gothenburg, 41296, SwedenIVL Swedish Environmental Research Institute, Gothenburg, 41133, SwedenDepartment of Chemistry and Chemical engineering, Chalmers University of Technology, Gothenburg, 41296, SwedenWithin the EU-funded project, Global Mercury Observation System (GMOS) airborne mercury has been monitored at the background Råö measurement site on the western coast of Sweden from mid-May 2012 to the beginning of July 2013 and from the beginning of February 2014 to the end of May 2015. The following mercury species/fractions were measured: gaseous elemental mercury (GEM), particulate bound mercury (PBM) and gaseous oxidised mercury (GOM) using the Tekran measurement system. The mercury concentrations measured at the Råö site were found to be low in comparison to other, comparable, European measurement sites. A back-trajectory analysis to study the origin of air masses reaching the Råö site was performed. Due to the remote location of the Råö measurement station it receives background air about 60 % of the time. However, elevated mercury concentrations arriving with air masses coming from the south-east are noticeable. GEM and PBM concentrations show a clear annual variation with the highest values occurring during winter, whereas the highest concentrations of GOM were obtained in spring and summer. An evaluation of the diurnal pattern of GOM, with peak concentrations at midday or in the early afternoon, which often is observed at remote places, shows that it is likely to be driven by local meteorology in a similar way to ozone. Evidence that a significant part of the GOM measured at the Råö site has been formed in free tropospheric air is presented.https://www.atmos-chem-phys.net/16/13379/2016/acp-16-13379-2016.pdf |
| spellingShingle | I. Wängberg M. G. Nerentorp Mastromonaco J. Munthe K. Gårdfeldt Airborne mercury species at the Råö background monitoring site in Sweden: distribution of mercury as an effect of long-range transport Atmospheric Chemistry and Physics |
| title | Airborne mercury species at the Råö background monitoring site in
Sweden: distribution of mercury as an effect of long-range transport |
| title_full | Airborne mercury species at the Råö background monitoring site in
Sweden: distribution of mercury as an effect of long-range transport |
| title_fullStr | Airborne mercury species at the Råö background monitoring site in
Sweden: distribution of mercury as an effect of long-range transport |
| title_full_unstemmed | Airborne mercury species at the Råö background monitoring site in
Sweden: distribution of mercury as an effect of long-range transport |
| title_short | Airborne mercury species at the Råö background monitoring site in
Sweden: distribution of mercury as an effect of long-range transport |
| title_sort | airborne mercury species at the rao background monitoring site in sweden distribution of mercury as an effect of long range transport |
| url | https://www.atmos-chem-phys.net/16/13379/2016/acp-16-13379-2016.pdf |
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