The Arctic Outflow Campaign: A Measurement Study to Characterize the Composition and Photochemistry of Arctic Air Transported Southward During Spring

北极流出运动：春季向南输送的北极空气的成分和光化学特征的测量研究

• 批准号: 9528031
• 负责人: Richard Honrath
• 金额: $ 10.1万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-01-01 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528031&HistoricalAwards=false
• 关键词: Arctic; Outflow; Campaign; Measurement; Study

9528031 Honrath This project consists of a multi-investigator measurement campaign studying the springtime outflow of arctic air toward the North Atlantic. During winter and spring, levels of photochemically active pollutants are elevated in the remote arctic troposphere. Recent work indicates that transport through the Arctic provides a substantial flux of total reactive nitrogen (NOy) and non-methane hydrocarbons to the temperate North Atlantic region. This process may play a significant role in the tropospheric ozone budget of this and other remote regions. Current understanding of these effects is limited by an absence of measurements of the relevant compounds in southward-transported arctic air. The ground-based measurement campaign will take place during January-April, 1996, at a site in Newfoundland, within the dominant pathway of springtime arctic air flow. Measurements will include ozone, nitric oxide, nitrogen dioxide, peroxyacetic nitric anhydride, peroxypropionic nitric anhydride, alkyl nitrates, total reactive nitrogen, non-methane hydrocarbons, carbon monoxide, plus standard meteorological parameters and radiometer-based nitrogen dioxide photodissociation rates. Real-time isentropic back-trajectory forecasts and meteorological analyses will be used to guide the sampling frequency to ensure adequate coverage during outflow events. An archive of back-trajectories will assist in data interpretation. The results of this study will be used to assess the impact of the winter-spring arctic reservoir on the levels and speciation of NOx, NOy, and non-methane hydrocarbons at lower latitudes. Impacts on the local ozone formation/destruction rate and budget will be estimated using a photochemical box model.

9528031 HONRATH该项目由一个多次评估的测量运动组成，该活动研究了北大大西洋北极空气的春季流出。在冬季和春季，在偏远的对流层中，光化学活性污染物的水平升高。最近的工作表明，通过北极的运输提供了总反应性氮（NOY）和非甲烷烃到温带北大西洋地区的大量通量。该过程可能在该偏远地区和其他偏远地区的对流层臭氧预算中起重要作用。当前对这些作用的理解受到了对南方传播北极空气中相关化合物的测量的限制。 基于地面的测量活动将在1996年1月至4月期间在纽芬兰的一个地点，在春季北极气流的主要途径内。测量值将包括臭氧，一氧化氮，二氧化氮，过氧乙二醇酸酐，过氧丙型含量硝酸赤铁酸盐，烷基硝酸盐，总反应氮，非甲基烷烷基水解碳，一氧化碳，碳一氧化碳，再加上标准气候测量表和隔离式dio dio dio dio。实时的等熵背面三射预测和气象分析将用于指导采样频率，以确保在流出事件中确保足够的覆盖范围。背面介绍的档案将有助于数据解释。这项研究的结果将用于评估较低纬度下NOX，NOY和非甲烷烃的水平和形态的冬季春季北极储层的影响。将使用光化学框模型估算对当地臭氧形成/破坏率和预算的影响。