Study on surface O3 chemistry and photochemistry by UV energy conservation

Developmental Biology

Bai Jianhui¹ 

[1] LAGEO, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China$$

关键词: Surface ozone;    NOX;    UV energy;    Chemical and photochemical reaction;    Aerosol;   

DOI  :  10.5094/APR.2010.015

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

The point of view of transmission and conservation of UV energy was put forward to study O₃ photochemical processes. Surface O₃, NO_X, UV radiation and meteorological parameters were monitored at three sites. An energy relationship between O₃ and its affecting factors (NO_X, photochemistry, scattering, UV radiation) was built, and used to analyze O₃ and its relations with all factors. The calculated hourly and daily O₃ agreed well with that observed under different sky conditions and at different sites. The interactions between O₃ and its factors were analyzed, and it was found that UV is an important energy to trigger O₃ chemical and photochemical (C&P) reactions in the atmosphere, and 1 hour is a suitable time for UV energy transfer and utilization. The important roles of main factors to O₃ in clear and all skies were investigated and NO term was found to be more important than NO₂ term for the contribution to O₃. Direct and indirect UV energy (including chemical energy) utilization by NO, NO₂, and other constituents in the atmosphere control the formation and destruction of O₃. The photochemical term is an important bridge to relate O₃ C&P processes and UV absorption. The sensitivity studies showed that O₃ is more sensitive to its precursors than the other factors, and more sensitive to NO₂ than NO in summer. The responses of O₃ to the changes of all affecting factors are higher in summer than in autumn and higher in clear sky compared to cloudy sky conditions.

【 授权许可】

Unknown   

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