Laboratory and modelling studies of the reactions of peroxy radicals with XO (where X = Cl, Br or I).

过氧自由基与 XO（其中 X = Cl、Br 或 I）反应的实验室和模型研究。

• 批准号: NE/E005268/1
• 负责人: Carl Percival
• 金额: $ 38.55万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FE005268%2F1
• 关键词: Laboratory; modelling; studies; reactions; peroxy

Halogen chemistry can play a vital role in controlling the budgets of ozone, NOx, NOy and HOx throughout the troposphere and the importance of these families in determining atmospheric composition, the earth's radiative balance and any future change in climate can not be over-emphasised. However, there is a major gap in the kinetic database, in that there is little or no data for sub ambient temperatures and where data is available the picture is far from clear, and thus does not allow the full atmospheric importance of the coupling of halogen chemistry with peroxy radicals to be assessed. An integrated programme of laboratory and modelling studies is proposed to study a key set of peroxy radical reactions, namely RO2 + XO. A state of the art experimental system, a turbulent flow chemical ionisation mass spectrometer, that enables direct experimental acess to atmospherically relevant teperatures and pressures will be used to determine kinetic and mechanistic parameters. The experimental results will be raionalised using state of the art ab - intio calculations and then be incorporated into a global atmospheric model which allows the atmospheric importance of the interacttion of peroxy radicals with XO radicals to be assessed. The proposed work will be invaluable for the rationalisation of the effect of halogen chemistry on atmospheric pollution and climate change

在整个对流层中，卤素化学在控制臭氧，NOX，NOY和HOX的预算方面可以发挥至关重要的作用，并且这些家族在确定大气组成，地球的辐射平衡和气候变化中的重要性不能过分强调。但是，动力学数据库存在一个主要差距，因为次环境温度几乎没有或没有数据，并且在可用数据的地方远非清晰，因此不允许卤素耦合的全部气氛重要性用过氧自由基进行评估的化学。提出了一项实验室和建模研究的综合计划，以研究一组过氧自由基反应，即RO2 + XO。最先进的实验系统的状态，一种湍流化学电离质谱仪，它可以直接实验到与大气相关的阵营和压力，以确定动力学和机械参数。实验结果将使用最先进的AB计算，然后将其纳入全球大气模型中，该模型允许对过氧自由基与XO自由基的相互作用的大气重要性进行评估。拟议的工作对于卤素化学对大气污染和气候变化的影响的合理化将是无价的

项目成果

Reaction between CH3O2 and BrO radicals: a new source of upper troposphere lower stratosphere hydroxyl radicals.

• DOI: 10.1021/jp5108203
• 发表时间: 2015-05
• 期刊: The journal of physical chemistry. A
• 作者: D. Shallcross;K. Leather;A. Bacak;P. Xiao;Edmond P. F. Lee;M. Ng;D. Mok;J. Dyke;R. Hossaini;Martyn P. Chipper;eld;M. Khan;C. Percival

Sources of uncertainty in eddy covariance ozone flux measurements made by dry chemiluminescence fast response analysers

• DOI: 10.5194/amt-3-163-2010
• 发表时间: 2009-09
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: J. Muller;C. Percival;M. Gallagher;D. Fowler;M. Coyle;E. Nemitz