Author(s)

E.G. Nickerson, P. McCaslin, E. Sandoval, V.H. Paramo & R. Gonzalez

Abstract

Aircraft observations of ozone, carbon monoxide, and NO% over Mexico City during project AGUILA E.G. Nickerson," P. McCaslin,'* E. Sandoval,* V.H. Paramo/ R. Gonzalez* * Forecast Systems Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado 80303, USA ^Instituto Nacional de Ecologia, Mexico D.F., 06500, Mexico *Also affiliated with National Systems and Research, Boulder, Colorado 80303, USA ABSTRACT Measurements of pollutant concentrations and meteorological quantities in the air above Mexico City were obtained from an instrumented aircraft. The highest concentrations of Os (219 ppb), CO (6 ppm), and NO* (111 ppb) were measured over the central and southwestern portion of the basin. On a day for which flight level winds were predominately northerly, the highest values occurred in the afternoon, whereas when the winds were from a southerly direction, the highest values occurred in the morning. INTRODUCTION Government-reported values of ozone i

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