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Assessment of ambient mercury deposition fluxes by numerical air quality modeling

机译：通过数值空气质量模型评估环境汞沉积通量

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Since mercury monitoring activities are very limited in Japan and governmental monitoring data of mercury deposition fluxes are not available, it is necessary to choose some numerical models to protect and manage the local ambient air quality. Numerical models for mercury transportation and deposition should be developed to understand the scenario and pathway of atmospheric mercury concentration distributions and deposition fluxes in the local area of Japan. The ground-level mercury concentrations have to meet the environmental standards set by the Ministry of the Environment in Japan which is less than 40 mg m−3. The aim and scope of this research is to apply numerical models to forecast seasonal variation of ambient mercury concentrations and deposition fluxes in the local area of Japan. To estimate the ambient mercury concentrations in the local area, a dispersion model has been used, the National Institute of Advanced Science and Technology-Atmospheric Dispersion Model for Exposure and Risk Assessment (AIST-ADMER). The AIST-ADMER model calculated the yearly average concentration distributions of mercury in the Aichi Prefecture Japan, which serve as boundary and background concentrations of mercury for the mercury deposition model. Finally, the boundary and background concentrations of mercury calculated by the AIST-ADMER along with meteorological data were superposed in the mercury deposition model to calculate mercury deposition fluxes (dry and wet) in Isshiki Town of Aichi Prefecture. Maximum atmospheric concentrations of mercury were calculated as 2.89 ng m−3 by the AIST-ADMER model. In this study, total dry deposition fluxes and wet deposition fluxes were calculated to be 15.1 μg m−2 year−1 and 14.3 μg g m−2 year−1, respectively.
机译：由于日本的汞监测活动非常有限，并且没有政府提供的汞沉积通量监测数据，因此有必要选择一些数值模型来保护和管理当地的环境空气质量。应开发用于汞运输和沉积的数值模型，以了解日本当地大气汞浓度分布和沉积通量的情景和途径。地面汞的浓度必须符合日本环境省设定的环境标准，该标准应低于40 mg m-3。这项研究的目的和范围是将数值模型应用于预测日本当地环境汞浓度和沉积通量的季节性变化。为了估算当地的环境汞浓度，使用了一种扩散模型，即国家先进科学技术研究院-暴露和风险评估的大气扩散模型（AIST-ADMER）。 AIST-ADMER模型计算了日本爱知县的汞年平均浓度分布，该值作为汞沉积模型中汞的边界浓度和背景浓度。最后，将由AIST-ADMER计算得出的汞的边界和背景浓度以及气象数据叠加到汞沉积模型中，以计算爱知县一色町的汞沉积通量（干湿）。根据AIST-ADMER模型，汞的最大大气浓度为2.89 ng m-3。在这项研究中，总干沉降通量和湿沉降通量分别计算为15.1μgm-2年-1和14.3μgg m-2年-1。

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