Collaborative Research:  Reactive Chlorine Cycling in Marine Air

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项目编号	1347520
	Collaborative Research: Reactive Chlorine Cycling in Marine Air
	Eric Saltzman
主持机构	University of California-Irvine
项目开始年	2015
	2015
项目结束日期	2017-12-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	345041(USD)
国家	美国
语种	英语
英文摘要	This purpose of this research is to lay the fundamental analytical groundwork for the study of reactive chlorine in marine air. Reactive chlorine compounds have the potential to alter the lifetime and reaction pathways of many climate-active gases in the atmosphere. Understanding of tropospheric chlorine chemistry is limited by a lack of in situ observations of chlorine atom precursors and reaction products. The long-term research goal is to assess (1) the levels of Cl atoms in marine air and the photochemical processes controlling them, (2) the impact of chlorine chemistry on methane and other climate-active gases, and (3) the influence of anthropogenic pollutants on atmospheric Cl reactivity. However, achieving that goal requires development of important analytical capability. Accordingly, the immediate objective of this project is to develop and evaluate analytical techniques and instrumentation for measuring the levels of reactive Cl compounds in marine air. This work will have societal impact by improving our understanding of tropospheric chlorine reactivity, particularly towards methane, and human impact on that reactivity. It will also support the education of a graduate student at the University of California, Irvine. This project involves the development and field testing of instrumentation for measuring key compounds in reactive Cl cycling (Cl2, BrCl, HOCl, ClO, HCl, and ClONO2) as well as ancillary measurements (HOx, NO2). These measurements will provide an estimate of Cl atom levels. It is expected that study will eventually lead field observations on the island of Bermuda in both clean marine air and in air impacted by North American outflow of pollutants. The ultimate goal is to develop and validate models that can be used to quantitatively assess the impact of reactive Cl cycling over the oceans on the lifetime of methane and other hydrocarbons.
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文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/67437
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Eric Saltzman.Collaborative Research: Reactive Chlorine Cycling in Marine Air.2015.