HR: 13:55h
AN: A23D-02    [Abstracts]
TI: Aerosol number size distribution measurements in Beijing, China
AU: Wehner, B
EM: birgit@tropos.de
AF: Institute for Tropospheric Research, Permoserstr. 15, Leipzig, 04318 Germany
AU: Tuch, T M
EM: tuch@tropos.de
AF: Institute for Tropospheric Research, Permoserstr. 15, Leipzig, 04318 Germany
AU: Wiedensohler, A
EM: ali@tropos.de
AF: Institute for Tropospheric Research, Permoserstr. 15, Leipzig, 04318 Germany
AU: Wu, Z J
EM: zjunwu@163.com
AF: tate Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing, 100871 China
AU: Hu, M
EM: minhu@ces.pku.edu.cn
AF: tate Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing, 100871 China
AU: * Shao, M
EM: mshao@pku.edu.cn
AF: tate Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing, 100871 China
AU: Kiang, C S
EM: kiang@mindspring.com
AF: tate Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing, 100871 China
AB: Continuous measurements of aerosol number size distributions in the size range from 3~nm to 10~$\mu$m have been first performed within the city area of Beijing since the beginning of March 2004. The number size distributions of the first 45 measurement days (March 05 to April 18, 2004) were investigated in terms of their high variability. Two dust storm events were observed indicated by high number concentrations greater than 1~$\mu$m and total mass concentrations around 1~mg~m$^{-3}$. Continental highly polluted air was observed during 12~days indicated by a number concentration peak in the accumulation mode range, and submicrometer particle volume concentrations of more than 150~$\mu$m$^3$~cm$^{-3}$ were observed. Newly formed particles with more than 100,000~cm$^{-3}$ were observed on 25 days of measurement period. The measurements show generally no significant subsequent particle growth of the newly formed particles.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting