全球近地层臭氧时空分布特征及其来源解析

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摘要根据东亚酸沉降网（EANET）和全球温室气体数据中心（WDCGG）等观测资料，对比各地区近地面O₃的季节变化特征，在全球大气化学传输模式MOZART-4中引入在线源追踪方法，结合收支分析，确认各项作用对不同地区O₃的贡献量.研究表明，模拟结果能够再现各地区O₃的季节变化特征以及收支量：清洁背景地区（海洋站居多）近地面O₃各项收支量较小，体积分数在-3×10^-9-3×10^-9/d之间，且净的化学作用大多处于损耗O₃的状态；大多数陆地测站净的光化学作用为产生O₃（约33.8×10^-9/d）.近地面O₃的源主要来自对流层内部，平流层的贡献较小（约10×10^-9）.对于极地及清洁背景地区，平流层的贡献是O₃季节变化的重要原因.平流层的贡献呈现明显的季节变化，即冬季最大（约20.7×10^-9），夏季最低（约2×10^-9）.

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	费冬冬
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关键词 ：对流层O₃, 全球大气化学模式, 在线源追踪, O₃收支, 季节变化

Abstract：Based on observational data from the Acid Deposition Monitoring Network in East Asia (EANET) and World Data Centre for Greenhouse Gases (WDCGG), the seasonal variation characteristics of surface ozone in various regions was compared. By MOZART-4model and the online tagging method, combined with the analysis of O₃ budget, the contribution of various effects to ozone were confirmed in different regions. The model-simulated O₃ and its precursors agreed well with observed values and other researches in the troposphere. The analyses of O₃ budgets at surface showed the values of budgets were relatively low (-3×10^-9~ 3×10^-9/d), and the chemistry was net loss of O₃ over clean background regions (most near ocean). Over continental region, the chemistry was net production of O₃(~ 33.8×10^-9/d), and the main sources of surface O₃ were from inside of troposphere, while the contributions of stratospheric O₃ were relatively low (~ 10×10^-9). Over polar and clean region, the contributions of stratospheric O₃ showed obvious seasonal changes with the largest in winter (~ 20.7×10^-9) and the lowest in summer (~2×10^-9), which account for the O₃ seasonal variations.

Key words： tropospheric ozone global atmospheric chemistry model online tagging ozone ozone budget seasonal variation

收稿日期: 2020-12-15

PACS:

X515

基金资助:国家重点研发计划（2016YFA0602003）；国家自然科学基金项目（41605096，41705119）

通讯作者: 侯雪伟,讲师,houxw@nuist.edu.cn E-mail: houxw@nuist.edu.cn

作者简介: 费冬冬(1986-),男,江苏镇江人,工程师,博士,主要从事大气环境数值模拟研究.发表论文4篇.

引用本文:

费冬冬, 侯雪伟, 魏蕾. 全球近地层臭氧时空分布特征及其来源解析[J]. 中国环境科学, 2021, 41(7): 3004-3016. FEI Dong-dong, HOU Xue-wei, WEI Lei. Quantitative sources of global surface ozone and spatial and temporal distribution characteristics. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(7): 3004-3016.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2021/V41/I7/3004

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