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A numerical simulation of present and future acid deposition in North East Asia using a comprehensive acid deposition model
AbstractThe future changes of acid deposition characteristics in North East Asia are investigated by comparing the simulation results of the comprehensive acid deposition model for the year 1996 with those for the year 2020. The SO2 emissions are estimated to increase less than 20% until 2020 in most of the North East Asian regions, whereas much greater emission increases are expected for NOx. The calculated future surface concentrations of the primary pollutants such as SO2 and NOx show a linear response to their future emission increases while being smoothed by the transport effects. In contrast, the calculated future surface concentrations of the secondary pollutants such as sulfate and HNO3 respond non-linearly to the future emission changes of the corresponding primary pollutants. The ratio of future wet deposition to dry deposition is calculated to decrease for sulfate but to increase for nitrate, implying that the importance of dry deposition will increase for sulfate but decrease for nitrate in 2020 compared to 1996. In addition, the S/N ratio of the wet and dry deposition is predicted to decrease substantially in 2020 due to the aggressive control policies on SO2 emissions expected in the region. Finally, the long-range transport from China to Korea is estimated to be less important for sulfur-containing acids but more important for nitrogen-containing acids in 2020 compared to 1996.
A numerical simulation of present and future acid deposition in North East Asia using a comprehensive acid deposition model
AbstractThe future changes of acid deposition characteristics in North East Asia are investigated by comparing the simulation results of the comprehensive acid deposition model for the year 1996 with those for the year 2020. The SO2 emissions are estimated to increase less than 20% until 2020 in most of the North East Asian regions, whereas much greater emission increases are expected for NOx. The calculated future surface concentrations of the primary pollutants such as SO2 and NOx show a linear response to their future emission increases while being smoothed by the transport effects. In contrast, the calculated future surface concentrations of the secondary pollutants such as sulfate and HNO3 respond non-linearly to the future emission changes of the corresponding primary pollutants. The ratio of future wet deposition to dry deposition is calculated to decrease for sulfate but to increase for nitrate, implying that the importance of dry deposition will increase for sulfate but decrease for nitrate in 2020 compared to 1996. In addition, the S/N ratio of the wet and dry deposition is predicted to decrease substantially in 2020 due to the aggressive control policies on SO2 emissions expected in the region. Finally, the long-range transport from China to Korea is estimated to be less important for sulfur-containing acids but more important for nitrogen-containing acids in 2020 compared to 1996.
A numerical simulation of present and future acid deposition in North East Asia using a comprehensive acid deposition model
Kim, Jaehee (author) / Cho, SeogYeon (author)
Atmospheric Environment ; 37 ; 3375-3383
2003-04-30
9 pages
Article (Journal)
Electronic Resource
English
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