HR: 0830h
AN: A51F-0750    [PDF]
TI: Lidar Measurements Of Aerosols In Taiwan
AU: * Chiang, C
EM: d882002@phy.ncu.edu.tw
AU: Nee, J
EM: jbnee@phy.ncu.edu.tw
AB: Lidar observations have been carried out for the tropospheric aerosols in the height region 1-5 km during 2002-2003. Lidar measurements revealed the occurrence, height distributions and transport processes of aerosols related to Asian dust and biomass burning aerosols that has been conveyed from China and southeast Asia respectively. The properties of these aerosols are investigated by comparisons with meteorological conditions (Radiosonde), ground particulate measurements (PM10), satellite image (NAAPS AOD / TOMS AI Composite plots), and trajectory studies (HYSPLIT). The backscattering ratio of the both Asian dust and biomass burning aerosols exhibit the steepest gradient compared with the relative humidity which also show the sharp gradient. It indicates a possibility of modification of aerosol particles which might be mixed with humid air in the transport process. In addition, both of Asian dust and biomass burning aerosols tend to be trapped by temperature inversion layer. From the analysis of depolarization ratio, we found that the nonspherical particles arrived were predominant below 2.5 km for dust events.
UR: http://lidar.phy.ncu.edu.tw
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0320 Cloud physics and chemistry
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting