E3S Web of Conferences
Volume 1, 2013Proceedings of the 16th International Conference on Heavy Metals in the Environment
|Number of page(s)
|GMOS II (Global Mercury Observation System)
|23 April 2013
Regional modeling of atmospheric mercury: impact of meteorological variables
Department for Environmental Chemistry, Institute of Coastal Research, Helmholtz-Zentrum Geestacht, 21502 Geesthacht, Germany
The atmospheric mercury concentration in Europe was simulated with the regional atmospheric chemistry transport model CMAQ-Hg. Two sets of meteorological fields, one from MM5 and one from COSMO-CLM (CCLM) were used to drive the model. The results differ significantly, in particular gaseous elemental mercury (Hg0) concentrations are much lower in the run with meteorological fields from MM5 compared to the run with CCLM meteorology. Looking at the mercury sinks within the model domain, it was found that dry deposition of Hg0 is the main sink in both model runs. Remarkably, dry deposition velocities are much higher when calculated with MM5 meteorological fields. Wet deposition of oxidized mercury is a factor of 5-6 lower than dry deposition of Hg0. In CMAQ with MM5 meteorology wet deposition is about afactor of two higher compared to the run with CCLM.
Key words: mercury / chemistry transport modeling / deposition / meteorological fields
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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