Measurements of Hydroxyl Radical (OH)/Nitric Acid (HNO3) for Program for Research on Oxidants: Photochemistry, Emissions, and Transport (PROPHET)

氧化剂研究计划的羟基自由基 (OH)/硝酸 (HNO3) 测量：光化学、排放和传输 (PROPHET)

• 批准号: 0115656
• 负责人: David Tanner
• 金额: $ 21.99万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0115656&HistoricalAwards=false
• 关键词: Measurements; Hydroxyl; Radical; OH; Nitric

A recently built instrument capable of measuring atmospheric OH (hydroxyl radical), H2SO4 (sulfuric acid), and HNO3 (nitric acid) will be deployed during the 2001 Summer intensive of PROPHET (Program for Research on Oxidants: Photochemistry, Emissions, and Transport) in Northern Michigan. The measurement technique is based on chemical ionization mass spectrometry (CIMS). In earlier PROPHET campaigns, measurements using a fluorescence-based technique showed the surprising result of measurable levels of OH during the night. Deploying this fundamentally different technique could confirm the occurrence of nighttime OH under the conditions of the PROPHET site. The measurements of H2SO4 will complement ongoing aerosol measurements, and the measurements of HNO3 would complement measurements of other individual compounds in the reactive nitrogen (NOy) family.

最近建造的一台能够测量大气OH（羟基自由基），H2SO4（硫酸）和HNO3（硝酸）的仪器将在2001年夏季在密歇根州北部部署PROPHET（氧化剂研究计划：光化学，排放和运输）。测量技术基于化学电离质谱法（CIMS）。在早期的PROPHET活动中，使用基于荧光的技术测量显示了夜间可测量的OH水平的惊人结果。采用这种完全不同的技术可以在PROPHET站点的条件下确认夜间OH的发生。H2SO4的测量将补充正在进行的气溶胶测量，而HNO3的测量将补充活性氮（NOy）家族中其他单个化合物的测量。