HR: 16:00h
AN: A24A-01    [Abstracts]
TI: Major Air Pollutants Over the Western Plain in Taiwan
AU: Liu, S C
EM: shawliu@earth.sinica.edu.tw
AF: Academia Sinica, P.O. Box 1-55, Nankang, Taipei, 11529 Taiwan
AU: * Chang, J S
EM: julius@cc.ncu.edu.tw
AF: National Central Univ., Chung-Li, ChungLi, 22529 Taiwan
AB: The Western Plain of Taiwan where more than two thirds of Taiwan­Ęs 23 million population reside is practically a megacity. Oxidants and particulate matter at levels hazardous to human health are found throughout the Western Plain. In addition, deposition of large amounts of sulfate, nitrate, and ammonium ions has severely stressed the ecosystem. While emission controls have effectively brought down the concentrations of particulate matter in the last decade, ozone concentrations have increased significantly. The cause(s) of the ozone increase is not fully understood. Data taken by Taiwan EPA air quality stations suggest that smaller titration by nitrogen oxide in recent years is a contributor to the ozone increase in urban areas. There is some indication that an increase in synoptic scale background ozone concentration is also a contributor, implying a significant role of long-range transport.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting