Trend analysis of O3 and CO in the period 1980–1996: A three‐dimensional model study

摘要: During the last 20–30 years, noticeable changes have occurred in emissions related to anthropogenic activity over globe. In this study a three-dimensional chemical transport model for troposphere (the 3-D Oslo CTM1 model) is used investigate how concentration of carbon monoxide (CO) and ozone (O3) period 1980–1996 can be emission rates patterns. The results indicate that both species reflect well, especially CO because it large degree driven by emissions. most pronounced effect O3 seen eastern Europe Southeast Asia. annual trend concentrations planetary boundary layer during −1.94±0.42 ppbv/yr −0.01±0.02 ppbv/yr, respectively. Asia positive seen, with 2.29±0.13 0.6 ± 0.03 concentration. agreement between modeled observations good. For an improvement gained compared observations, including from aircraft, two effects reduced stratospheric level (altered photolysis stratospheric-tropospheric exchange) study.