title: NO and NO2 emission ratios measured from in-use commercial aircraft during taxi and takeoff.
abstract: In August 2001, the Aerodyne Mobile Laboratory simultaneously measured NO, NO2, and CO2 within 350 m of a taxiway and 550 m of a runway at John F. Kennedy Airport. The meteorological conditions were such that taxi and takeoff plumes from individual aircraft were clearly resolved against background levels. NO and NO2 concentrations were measured with 1 s time resolution using a dual tunable infrared laser differential absorption spectroscopy instrument, utilizing an astigmatic multipass Herriott cell. The CO2 measurements were also obtained at 1 s time resolution using a commercial non-dispersive infrared absorption instrument. Plumes were measured from over 30 individual planes, ranging from turbo props to jumbo jets. NOx emission indices were determined by examining the correlation between NOx (NO + NO2) and CO2 during the plume measurements. Several aircraft tail numbers were unambiguously identified, allowing those specific airframe/engine combinations to be determined. The resulting NOx emission indices from positively identified in-service operating airplanes are compared with the published International Civil Aviation Organization engine certification test database collected on new engines in certification test cells.
authors.affiliation: Aerodyne Research, Inc, Billerica, Massachusetts 01821-3976, USA. herndon@aerodyne.com
authors.forename: Scott C
authors.initials: SC
authors.lastname: Herndon
authors.forename: Joanne H
authors.initials: JH
authors.lastname: Shorter
authors.forename: Mark S
authors.initials: MS
authors.lastname: Zahniser
authors.forename: David D
authors.initials: DD
authors.lastname: Nelson
authors.forename: John
authors.initials: J
authors.lastname: Jayne
authors.forename: Robert C
authors.initials: RC
authors.lastname: Brown
authors.forename: Richard C
authors.initials: RC
authors.lastname: Miake-Lye
authors.forename: Ian
authors.initials: I
authors.lastname: Waitz
authors.forename: Phillip
authors.initials: P
authors.lastname: Silva
authors.forename: Thomas
authors.initials: T
authors.lastname: Lanni
authors.forename: Ken
authors.initials: K
authors.lastname: Demerjian
authors.forename: Charles E
authors.initials: CE
authors.lastname: Kolb
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000032:analysis*; D000401:Aircraft; D002245:Carbon Dioxide / Q000032:analysis; D006801:Humans; D009518:New York; D009585:Nitrogen Dioxide / Q000032:analysis*; D009589:Nitrogen Oxides / Q000032:analysis*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D009589:Nitrogen Oxides; D001335:Vehicle Emissions; D002245:Carbon Dioxide; D009585:Nitrogen Dioxide