Formation of Secondary Pollutants During Long-Range Transport and Its Contribution to Air Quality in East Asia
1995; Springer Nature; Volume: 6; Issue: 3 Linguagem: Inglês
10.3319/tao.1995.6.3.487(rec)
ISSN2311-7680
AutoresHiromasa Ueda, Gregory R. Carmichael,
Tópico(s)Vehicle emissions and performance
ResumoThe relationship between secondary pollutants and their formation dur ing long-range transport (LRT) and its contribution to air quality in East Asia were investigated through field observations and numerical simulations.At first, it was found that the tropospheric ozone level in this area was high est in the world with maximuni values occurring in the spring.This Wi!S � � .... . .suggested to have been caused by two mechanisms: the stratospheric ozolle intrusion into the troposphere, and the regional-scale LRT of anthropogenic pollutants and the tropospheric ozone formation caused by them.This was found to be associated with yellow sand events and to cause a simultaneous increase in spm and ozone c .oncentrations.The elevated ozone concentration was predicted well by an Eulerian transport I chemistry I deposition model (STEM-II model, Carmichael et al., 1986), which quantitatively suggested the important role of the latter mechanism.In addition, a clear insight into chemical processes during LRT was presented, based upon the concentration changes of secondary pollutants and radicals (OH and R0 2 ) along the route of LRT in central Japan.
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