TY - JOUR
T1 - Development of an aerosol dynamics model for dry deposition process using the moment method
AU - Bae, Soo Ya
AU - Jung, Chang Hoon
AU - Kim, Yong Pyo
N1 - Funding Information:
This work was supported from the National Research Laboratory (No. R0A-2006-000-10221-0) and the Climate Environment System Research Center, an SRC program, both funded by Korea Science and Engineering Foundation.
PY - 2009/6
Y1 - 2009/6
N2 - An aerosol dynamics model for dry deposition process is developed based on the moment method. Since it is hard to fully apply the moment method to the widely used dry deposition velocity expressions based on the resistance theory, the dry deposition velocity expression by Raupach et al. (2001) is used. Detailed deposition mechanisms such as Brownian diffusion, gravitational settling, and impaction are considered in the expression. To verify the validity of the derived dynamic equation, aerosol dynamics for the dry deposition process is estimated with the expressions of Raupach et al. (2001), of Wesely (1989) modified for particles (Seinfeld and Pandis 1998), in CMAQ, and with constant value used in RAINS-ASIA. Those expressions give different dynamics. Generally, the result for this study is between the result of modified Wesely's expression and CMAQ. When using the modified Wesely's expression with the number of sections being equal or smaller than 10, the resultant size distribution does not give the peak shape accurately.
AB - An aerosol dynamics model for dry deposition process is developed based on the moment method. Since it is hard to fully apply the moment method to the widely used dry deposition velocity expressions based on the resistance theory, the dry deposition velocity expression by Raupach et al. (2001) is used. Detailed deposition mechanisms such as Brownian diffusion, gravitational settling, and impaction are considered in the expression. To verify the validity of the derived dynamic equation, aerosol dynamics for the dry deposition process is estimated with the expressions of Raupach et al. (2001), of Wesely (1989) modified for particles (Seinfeld and Pandis 1998), in CMAQ, and with constant value used in RAINS-ASIA. Those expressions give different dynamics. Generally, the result for this study is between the result of modified Wesely's expression and CMAQ. When using the modified Wesely's expression with the number of sections being equal or smaller than 10, the resultant size distribution does not give the peak shape accurately.
UR - http://www.scopus.com/inward/record.url?scp=67651156035&partnerID=8YFLogxK
U2 - 10.1080/02786820902798476
DO - 10.1080/02786820902798476
M3 - Article
AN - SCOPUS:67651156035
SN - 0278-6826
VL - 43
SP - 570
EP - 580
JO - Aerosol Science and Technology
JF - Aerosol Science and Technology
IS - 6
ER -