SGER: Reactive Halogen Detection in the Marine Boundary Layer Using Atmospheric Pressure Ionization/Chemical Ionization Mass Spectrometer (API/CIMS)

SGER：使用大气压电离/化学电离质谱仪 (API/CIMS) 检测海洋边界层中的活性卤素

• 批准号: 0403421
• 负责人: Eric Saltzman
• 金额: $ 13.03万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0403421&HistoricalAwards=false
• 关键词: SGER; Reactive; Halogen; Detection; Marine

This Small Grants for Exploratory Research (SGER) project involves the deployment of a newly developed instrument aboard a research cruise vessel (R/V Wecoma) in the North Pacific Ocean region in the spring and early summer of 2004. This cruise of opportunity, from Guam to Oregon via Hawaii, is dedicated to understanding the exchange of organic halogen compounds between the ocean and the atmosphere. This project will involve first measurements of the dihalogen gases, chlorine (Cl2), bromine (Br2), iodine (I2), bromochlorine (BrCl), and iodochlorine (ICl), over the open ocean. The measurement method is based on atmospheric pressure chemical ionization mass spectrometry (API/CIMS), variants of which have been demonstrated by other researchers to be extremely sensitive and selective for atmospheric trace components. These first measurements, if successful, will provide valuable information on the role of these gases impact on the chemistry of ozone, hydrocarbons and sulfur compounds in the marine boundary layer, and could substantially revise our understanding of atmospheric photochemistry in this region. A second, even more exploratory measurement involves the quantification of the halogen oxides, ClO and BrO, using chemical conversion to species (deuterated haloacetones) that can be measured by API/CIMS.The broader impacts of this research include providing field research experience for two graduate students and one post-doctoral fellow. In addition, this research contributes to the goals of the Surface Ocean Lower Atmosphere Study (SOLAS) program by helping to understand the composition of the marine atmospheric boundary layer and provide constraints on exchange of these gases with the ocean surface layer. In the longer view, this research will improve understanding of the oxidation processes operative in the marine boundary layer, and thus will better constrain the fate and lifetime of gases important for the earth's climate.

这项用于探索性研究（SGER）项目的小额赠款涉及在2004年春季和夏季北太平洋地区的一艘研究邮轮公司（R/V WECOMA）上部署新开发的仪器。从关岛到夏威夷的俄勒冈州，这次机会巡游，致力于理解有机卤素复合海洋和海洋和氛围之间的有机卤素复合的交流。 该项目将涉及二氢气体，氯（CL2），溴（BR2），碘（I2），溴氯氯（BRCL）和碘氯氯（ICL）的首次测量。 该测量方法基于大气压化学电离质谱法（API/CIMS），其变体已被其他研究人员证明，对大气痕量成分非常敏感和选择性。 如果成功的话，这些首次测量将提供有关这些气体对海洋边界层中臭氧，碳氢化合物和硫化合物的化学作用的有价值的信息，并且可以实质上修改我们对该地区大气光化学的理解。 第二，更具探索性测量涉及对卤素氧化物，CLO和BRO的定量，使用化学转化为物种（剥离的卤酰胺），可以通过API/CIM进行测量。这项研究的更广泛影响包括为两个研究生提供现场研究经验，并提供了一名后研究生。 此外，这项研究通过帮助了解海洋大气边界层的组成，并为这些气体与海面层交换提供限制，从而为表面海洋下部大气研究（SOLAS）计划的目标做出了贡献。 从较长的角度来看，这项研究将提高对海洋边界层中氧化过程的理解，因此将更好地限制对地球气候重要的气体的命运和寿命。