摘要
主要介绍一个可用于化学输送模式的对流层O3来源和过程追踪技术。该方法可定量估算不同区域的光化学反应通过输送过程对目标地区O3浓度的贡献,并且克服了光化学非线性特征对估算结果的影响。以研究2001年中国南部和北部光化学生成O3的输送为例,通过与改进的敏感性分析方法比较,系统评估了该方法的合理性。比较结果表明,两种方法的估算结果在水平、垂直分布和典型输送个例等方面具有良好的一致性,说明污染物来源和过程追踪技术可以为量化区域输送对目标地区O3浓度的影响提供合理结果。个例模拟分析的结果也表明,中国南部和北部光化学生成的O3可以通过输送对整个东亚O3产生重要影响,并且在不同的季节呈现不同的特征。
An online tracer-tagged method coupled into a chemical transport model was described.Without the errors caused by the non-linear character of O3 photochemistry,the online tracer-tagged method can be used to estimate the contributions from the photochemistry over various regions to the total O3 concentrations in the targeted region in one simulation.To evaluate the results,taking the contributions from the photochemistry over the tagged northern and southern parts of China as an example,the online tracer-tagged method was compared with the revised sensitivity analysis.The comparison suggested that the online tracer-tagged method can reproduce the horizontal and vertical distributions of the contributions from two tagged regions to the O3 concentrations in East Asia,and also capture the typical heavy regional transport episode.This indicated the tracer-tagged method in this study can be used to quantitatively assess the impact of the regional transport on the tropospheric O3.The analysis also showed that the photochemistry in the southern and northern parts of China had a noticeable impact on O3 in East Asia,and varied with the seasons.
出处
《气候与环境研究》
CSCD
北大核心
2010年第5期529-540,共12页
Climatic and Environmental Research
基金
国家自然科学青年基金40805051
国家重点基础研究发展计划项目2005CB422205
