Characterization of the Role of Nitrogen Oxides in the Photochemistry of the North Atlantic Troposphere

氮氧化物在北大西洋对流层光化学中的作用表征

• 批准号: 9300166
• 负责人: Richard Honrath
• 金额: $ 30.09万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9300166&HistoricalAwards=false
• 关键词: Characterization; Role; Nitrogen; Oxides; Photochemistry

The eastern U.S. is a major source of ozone and ozone precursors to the North Atlantic region. Previous studies have shown that emissions from this region significantly affect levels of NOx and hydrocarbons over the Western North Atlantic Ocean, and recent measurements indicate that transport of ozone produced over the eastern U.S substantially alters the ozone budget of the temperate North Atlantic region. However the total impact of anthropogenic emissions on the photochemistry of this region is currently poorly understood. A primary reason is a paucity of information on NOx (NO + NO2) and total reactive nitrogen levels over the central and eastern North Atlantic, which results in uncertainty as to the ultimate fate and impact of anthropogenic emissions on the regional ozone budget. This project seeks to address this problem through measurements of NO and NOy (total reactive nitrogen oxides) at a site in the Azores. The location is ideal for observation of aged emissions transported from eastern North America and is suitably isolated from European impacts. Measurements would be made in conjunction with a currently-planned CO (carbon) and O3 (ozone) monitoring program, and would take place in concert with the other measurement programs in order to assess seasonal variations. The resulting data would be used to quantify anthropogenic impacts on NOx and ozone levels in the North Atlantic troposphere.

美国东部是北大西洋地区臭氧和臭氧前体的主要来源。 以前的研究表明，该地区的排放量显着影响氮氧化物和碳氢化合物的水平在西北大西洋，最近的测量表明，在美国东部产生的臭氧传输大大改变了北大西洋温带地区的臭氧收支。 然而，目前对人为排放对该区域光化学的总体影响知之甚少。 一个主要原因是缺乏关于北大西洋中部和东部的氮氧化物（NO + NO2）和总活性氮水平的信息，这导致了人为排放对区域臭氧收支的最终命运和影响的不确定性。 该项目旨在通过测量亚速尔群岛一个地点的NO和NOy（总活性氮氧化物）来解决这一问题。 该地点是观测从北美东部输送过来的老化排放物的理想地点，并与欧洲的影响适当隔离。 测量将与目前计划的CO（碳）和O3（臭氧）监测计划一起进行，并将与其他测量计划一起进行，以评估季节变化。 由此产生的数据将用于量化人类活动对北大西洋对流层氮氧化物和臭氧水平的影响。