Field Measurement of NO, NO2, and 03 From Lightning

闪电现场测量 NO、NO2 和 03

• 批准号: 8911710
• 负责人: Carl Popp
• 金额: $ 6.55万
• 依托单位: New Mexico Institute of Mining and Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-15 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911710&HistoricalAwards=false
• 关键词: Field; Measurement; NO; NO2; 03

Nitrogen oxides are important chemical species in the atmosphere. For instance, the amount of nitrogen oxides controls whether ozone is produced or consumed in the oxidation of hydrocarbons. To assess the importance of industrial and other anthropogenic sources of nitrogen oxides, it is necessary to determine the natural production of these compounds. Lighting is suspected to be a significant natural source of nitrogen oxides. Yet, a major uncertainty exists in the quantity of nitrogen oxide produced during a flash. As a consequence, the biogeochemical cycling of nitrogen add nitrogen photochemistry in the natural atmosphere is also uncertain. This project seeks to determine experimentally the production of nitrogen oxides from nearby triggered lightning and also from more distant natural lightning. The project will measure with a chemiluminescent oxides of nitrogen analyzer the ratio of NO to NO2 in plumes from lightning flashes and will measure with an absorption spectrometer the cross sectional burden of NO2 in plumes from lightning flashes and in air parcels in which a number of lightning flashes have occurred. The project will lead to improved and more confined estimates of the natural production of nitrogen oxides by lightning and thus determine the importance of lightning as a global source.

氮氧化物是大气中重要的化学物质。 例如，氮氧化物的量控制在碳氢化合物的氧化过程中是否产生或消耗臭氧。 为了评估工业和其他人为氮氧化物来源的重要性，有必要确定这些化合物的自然产生量。 照明被怀疑是氮氧化物的重要天然来源。 然而，闪蒸过程中产生的氮氧化物的数量存在很大的不确定性。 因此，自然大气中氮和氮光化学的生物地球化学循环也是不确定的。 该项目旨在通过实验确定附近触发闪电和更远距离自然闪电产生的氮氧化物。 该项目将使用化学发光氮氧化物分析仪测量闪电羽流中 NO 与 NO2 的比率，并使用吸收光谱仪测量闪电羽流和闪电产生的空气团中 NO2 的横截面负荷。发生了闪光。 该项目将改进对闪电自然产生的氮氧化物的估计，从而确定闪电作为全球来源的重要性。