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

基本信息

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

项目摘要

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的臭氧和臭氧前体的主要来源。先前的研究表明，该地区的排放显着影响北大西洋西部的NOX和碳氢化合物的水平，最近的测量表明，在美国东部产生的臭氧的运输基本上改变了北大西洋地区的臭氧预算。然而，人类发射对该地区光化学的总影响尚不清楚。一个主要原因是北大西洋中部和东部的NOX（NO + NO2）和总反应氮水平的信息很少，这导致了人为排放对区域臭氧预算的最终命运和影响的不确定性。该项目旨在通过亚速尔群岛的地点的NO和NOY（总反应氮氧化物）的测量来解决此问题。该位置非常适合观察从北美东部运输的老化排放，并且与欧洲的影响相适应。将与当前计划的CO（碳）和O3（臭氧）监测计划一起进行测量，并将与其他测量计划一起进行，以评估季节性变化。所得数据将用于量化北大西洋对流层NOX和臭氧水平的人为影响。