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Discussion papers
https://doi.org/10.5194/acp-2020-102
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-102
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 05 Mar 2020

Submitted as: research article | 05 Mar 2020

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This preprint is currently under review for the journal ACP.

Source apportionment of atmospheric mercury in the remote marine atmosphere: Mace Head GAW station, Irish west coast

Danilo Custodio1, Ralf Ebinghaus1, T. Gerard Spain2, and Johannes Bieser1 Danilo Custodio et al.
  • 1Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Max-Planck-Str. 1, D-21502 Geesthacht, Germany
  • 2National University of Ireland, Galway, Ireland

Abstract. We examined recent atmospheric mercury concentrations measured with a high temporal resolution of 15 min. at Mace Head, a GAW station on the west coast of Ireland. We attributed a direct contribution of 34 % (0.44 ng m−3) to primary sources. Additionally, a steep decline (0.05 ng year−1) in mercury concentrations was observed between 2013 and 2018.

Using a stereo algorithm we reconstructed 99.9 % of the atmospheric mercury. A conservative analysis demonstrated no decreasing of TGM associated with atmospheric species typically used as tracers for oceanic emissions. The results show that the atmospheric mercury mass is mainly loaded in a baseline factor with an on-going decline. Moreover, we exploit temporal variation and wind pattern effects in the measured atmospheric species, the results show that the diurnal variation and seasonality in TGM observed in Mace Head is closely related to other species linked to primary sources and can be explained by transport from continental areas.

Danilo Custodio et al.

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Danilo Custodio et al.

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Latest update: 01 Apr 2020
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Short summary
Using a stereo algorithm we reconstructed 99.9 % of the total atmospheric gas mercury and presented a new insight on atmospheric mercury source assessing, which can have great relevance for policy and regulations in light of the Minamata convention.
Using a stereo algorithm we reconstructed 99.9 % of the total atmospheric gas mercury and...
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