RONOCO (ROle of Nighttime chemistry in controlling the Oxidising Capacity of the AtmOsphere)

RONOCO（夜间化学在控制大气氧化能力方面的作用）

• 批准号: NE/F004664/1
• 负责人: Dwayne Heard
• 金额: $ 45.61万
• 依托单位: University of Leeds
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FF004664%2F1
• 关键词: RONOCO; ROle; Nighttime; chemistry; controlling

There is now a significant and increasing body of evidence that night time chemistry, driven primarily by the nitrate radical NO3, plays a significant role in governing the composition of the troposphere. Recent findings show that very high concentrations of NO3 are present away from the Earth's surface. In polluted environments, the main sinks are abundant but this is also where its formation may be most rapid and hence the NO3 turnover time is very fast. The importance of this behaviour is not as yet clearly understood, yet it may have a very large impact on atmospheric chemistry and ozone formation, regional transport and transformation of oxidised nitrogen and hence acidification and eutrophication, and may also significantly add to the regional burden of ammonium nitrate particulate, which has increasing climatic importance. To understand and predict these phenomena correctly there is a need to quantify the basic chemical processes controlling NO3 and its removal from the atmosphere; the impact of NO3 chemistry on volatile organic carbon chemistry and as a pathway for radical formation and propagation; its heterogeneous chemistry and its impact on the aerosol burden and composition; its influence on ozone formation on regional and global scales and its mediation of the atmospheric lifecycle of oxidised nitrogen. A consortium project is proposed that addresses these coupled questions using a combined programme of instrument development, airborne measurement, detailed process modelling, and regional and global modelling. The principal deliverables will be: - Enhancements to the instrumental capability of the FAAM aircraft to include measurements of NO3 and N2O5. - Comprehensive measurements of night time radicals, their sources and sinks, and aerosol composition in the boundary layer and free troposphere in a range of conditions. - Quantification of the key processes which control night-time chemical processes. - Assessment of the impacts of night-time chemistry on regional scales. - An assessment of the global impacts of night-time chemistry in the current and future atmospheres.

现在有越来越多的重要证据表明，主要由硝酸根NO3驱动的夜间化学在控制对流层的组成方面发挥着重要作用。最近的发现表明，远离地球表面的地方存在着非常高浓度的 NO3。在污染环境中，主汇丰富，但这也是其形成最快的地方，因此 NO3 周转时间非常快。这种行为的重要性尚不清楚，但它可能对大气化学和臭氧形成、氧化氮的区域运输和转化以及由此产生的酸化和富营养化产生非常大的影响，并且还可能显着增加区域的负担硝酸铵颗粒物，其对气候的重要性日益增加。为了正确理解和预测这些现象，需要量化控制 NO3 及其从大气中去除的基本化学过程； NO3 化学对挥发性有机碳化学的影响以及作为自由基形成和传播途径的影响；其异质化学性质及其对气溶胶负荷和成分的影响；它对区域和全球范围内臭氧形成的影响及其对氧化氮的大气生命周期的调节。提出了一个联合项目，利用仪器开发、机载测量、详细过程建模以及区域和全球建模的组合计划来解决这些耦合问题。主要交付成果将是： - 增强 FAAM 飞机的仪器能力，包括 NO3 和 N2O5 的测量。 - 在一系列条件下综合测量夜间自由基、其源和汇以及边界层和自由对流层中的气溶胶成分。 - 控制夜间化学过程的关键过程的量化。 - 评估夜间化学对区域尺度的影响。 - 评估夜间化学对当前和未来大气的全球影响。

项目成果

Nighttime measurements of HO<sub>x</sub> during the RONOCO project and analysis of the sources of HO<sub>2</sub>

夜间测量 H2O

• DOI: 10.5194/acpd-15-2997-2015
• 发表时间: 2015
• 作者: Walker H

Night-time measurements of HO<sub><i>x</i></sub> during the RONOCO project and analysis of the sources of HO<sub>2</sub>

夜间测量 H2O

• DOI: 10.5194/acp-15-8179-2015
• 发表时间: 2015
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: Walker H

Aircraft observations of the lower troposphere above a megacity: Alkyl nitrate and ozone chemistry

• DOI: 10.1016/j.atmosenv.2014.05.040
• 发表时间: 2014-09
• 期刊: Atmospheric Environment
• 影响因子: 5
• 作者: E. Aruffo;P. Carlo;C. Dari-Salisburgo;F. Biancofiore;F. Giammaria;M. Busilacchio;James D. Lee;S. Moller;J. Hopkins;S. Punjabi;S. Bauguitte;D. O’Sullivan;C. Percival;M. Breton;J. Muller;R. L. Jones;G. Forster;C. Reeves;D. Heard;H. Walker;T. Ingham;S. Vaughan;D. Stone