Reactive Chlorine and Photochemistry in the Marine Troposphere

海洋对流层中的活性氯和光化学

• 批准号: 9103742
• 负责人: James Galloway
• 金额: $ 10.88万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9103742&HistoricalAwards=false
• 关键词: Reactive; Chlorine; Photochemistry; Marine; Troposphere

Proposed Mechanisms for the production of chlorine vapor from sea-salt aerosol in the marine boundary layer have important implications for tropospheric chemistry, but are as yet poorly understood. Acid-base desorption generates relatively unreactive HCl, whereas reactions involving non-acidic N gases and ozone and other selected reactive species produce highly reactive chlorine compounds which will initiate photochemical reactions in an analogous manner to OH. In addition, such reactions may represent and important tropospheric sink for ozone and other selected reactive species. This research is aimed at developing new measurement capabilities for assessing interactions of reactive chlorine with ozone and other selected reactive species, in the marine troposphere. The specific research objectives include: 1. Assessing sampling artifacts for species of interest and 2. Measuring major hypothesized product and reactant species involved in chlorine phase change as a function of phase and particle size.

海洋边界层中海盐气溶胶产生氯蒸气的拟议机制对对流层化学具有重要意义，但尚未得到充分了解。酸碱解吸产生相对不活跃的HCl，而涉及非酸性N气体和臭氧以及其他选定的活性物质的反应产生高度活跃的氯化合物，这些化合物将以类似于OH的方式引发光化学反应。此外，这种反应可能是臭氧和其他选定的反应物质的重要对流层吸收。这项研究的目的是开发新的测量能力，以评估海洋对流层中活性氯与臭氧和其他选定的活性物质的相互作用。具体的研究目标包括：1。评估感兴趣物种的采样工件；测量与氯相变化有关的主要假设产物和反应物种类，作为相和粒度的函数。