Comparison of mercury chemistry models |
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| Institution: | 1. Meteorological Synthesizing Center-East, Kedrova Str., 8-1, Moscow 117292, Russia;2. NOAA, Air Resources Laboratory US EPA Mail Drop E243-03 Research Triangle Park, NC 27711, USA;3. GKSS Research Centre, Max-Planck Str. 1, D-21502 Geesthacht, Germany;4. Atmospheric and Environmental Research, 2682 Bishop Drive, suite 120 San Ramon, CA 94583, USA;5. Swedish Environmental Research Institute (IVL), P.O. Box 47086, S-402 58 Göteborg, Sweden;1. Physics and Astronomy Department, Stony Brook University, Stony Brook, NY 11974, USA;2. Physics Department, Brookhaven National Laboratory, Bldg. 510A, Upton, NY 11973, USA;3. cInstitut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany;4. Department of Physics, University of Washington, Seattle, WA 98195-1560, USA;1. Institute of Physics, University of Tokyo, Komaba, Tokyo 153-8902, Japan;2. KEK Theory Center, Institute of Particle and Nuclear Studies, KEK, Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan;3. Graduate University for Advanced Studies (SOKENDAI), Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan;4. Department of Physics, Nagoya University, Nagoya 464-8602, Japan;5. Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University, Nagoya 464-8602, Japan;1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000, USA;2. Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;1. Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany;2. Physikalisches Institut, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany;3. Physics Department, Brookhaven National Laboratory, Bldg. 510A, Upton, NY 11973, USA;1. Cyclotron Institute and Department of Physics & Astronomy, Texas A&M University, College Station, TX 77843-3366, USA;2. Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, China |
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| Abstract: | Five mercury (Hg) chemistry models are compared using the same data set for model initialisation. All five models include gas-phase oxidation of Hg(0) to Hg(II) (except for one model), fast reduction–oxidation aqueous reactions between Hg(0) and Hg(II), and adsorption of Hg(II) species to soot particles within droplets. However, the models differ in their detailed treatments of these processes. Consequently, the 48-h simulations reveal similarities but also significant discrepancies among the models. For the simulation that included all Hg species (i.e., Hg(0), Hg(II) and Hg(p)) as well as soot in the initial conditions, the maximum simulated Hg(II) aqueous concentrations ranged from 55 to 148 ng l−1 whereas the minimum concentrations ranged from 20 to 110 ng l−1. These results suggest that further experimental work is critically needed to reduce the current uncertainties in the formulation of Hg chemistry models. |
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