NO and NO2 Emission Ratios Measured from In-Use Commercial Aircraft during Taxi and Takeoff

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• 作者：Scott C. Herndon ; Joanne H. Shorter ; Mark S. Zahniser ; David D. Nelson ; Jr. ; John Jayne ; Robert C. Brown ; Richard C. Miake-Lye ; Ian Waitz ; Phillip Silva ; Thomas Lanni ; Ken Demerjian ; and Charles E. Ko
• 刊名：Environmental Science & Technology
• 出版年：2004
• 出版时间：November 15, 2004
• 年：2004
• 卷：38
• 期：22
• 页码：6078 - 6084
• 全文大小：192K
• 年卷期：v.38,no.22(November 15, 2004)
• ISSN：1520-5851

文摘

In August 2001, the Aerodyne Mobile Laboratory simultaneously measured NO, NO₂, and CO₂ within 350 m of ataxiway and 550 m of a runway at John F. Kennedy Airport.The meteorological conditions were such that taxi andtakeoff plumes from individual aircraft were clearly resolvedagainst background levels. NO and NO₂ concentrationswere measured with 1 s time resolution using a dual tunableinfrared laser differential absorption spectroscopyinstrument, utilizing an astigmatic multipass Herriott cell.The CO₂ measurements were also obtained at 1 s timeresolution using a commercial non-dispersive infraredabsorption instrument. Plumes were measured from over30 individual planes, ranging from turbo props to jumbo jets.NO_x emission indices were determined by examining thecorrelation between NO_x (NO + NO₂) and CO₂ during theplume measurements. Several aircraft tail numbers wereunambiguously identified, allowing those specific airframe/engine combinations to be determined. The resulting NO_xemission indices from positively identified in-serviceoperating airplanes are compared with the publishedInternational Civil Aviation Organization engine certificationtest database collected on new engines in certificationtest cells.