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。 先前的研究表明，该地区的排放量显着影响北大西洋西部的氮氧化物和碳氢化合物的水平，最近的测量表明，美国东部产生的臭氧输送极大地改变了北大西洋温带地区的臭氧预算。 然而，目前人们对人为排放对该地区光化学的总体影响知之甚少。 主要原因是北大西洋中部和东部地区氮氧化物 (NO + NO2) 和总活性氮水平的信息匮乏，导致人为排放的最终命运和对区域臭氧预算的影响存在不确定性。 该项目旨在通过在亚速尔群岛的一个地点测量 NO 和 NOy（总活性氮氧化物）来解决这个问题。 该地点非常适合观察从北美东部输送的老化排放物，并且适当地隔离了欧洲的影响。 测量将与当前计划的 CO（碳）和 O3（臭氧）监测计划结合进行，并将与其他测量计划一起进行，以评估季节变化。 所得数据将用于量化人为对北大西洋对流层氮氧化物和臭氧水平的影响。