The percentage contribution of trans-boundary mercury (Hg) from China at different locations in South Korea was estimated from Hg anthropogenic emission distributions using the Hg dispersion model, CMAQ-Hg. This investigation quantifies the trans-boundary Hg emissions as contribution ratios. In addition, the long-range transportation frequency is also calculated, to verify inflow cases from China. The seasonal distribution of the Hg contribution ratio was found to be highest in winter (40%), followed by fall (16%). Seasonal observations of Hg inflow frequencies were estimated as 40%, 25%, 21%, and 4% in winter, fall, summer, and spring, respectively, at the same location. Such results would be produced by the wind generally blowing from the west and north-west with a speed of 5.0 m/s and 4.5 m/s, respectively, during winter and fall, around the study area. This study made an effort to quantify the trans-boundary Hg transport and to plot Hg anthropogenic emissions distribution in the region.
Bibliographical noteFunding Information:
This work is supported by the Korea Ministry of Environment (MOE) under the Environmental Health Action Program ( 2015001370001 ), and the Knowledge-based Environmental Service (Waste to Energy and Recycling) Program. This work is also supported by the Korea Research Fellowship Program, through the National Research Foundation of Korea (KRF), funded by the Ministry of Science, ICT and Future Planning (KRF Grant No. 2016H1D3A1938213 ).
All Science Journal Classification (ASJC) codes
- Atmospheric Science