Aviation fuel tracer simulation: Model intercomparison and implications

M. Y. Danilin, D. W. Fahey, U. Schumann, M. J. Prather, J. E. Penner, M. K.W. Ko, D. K. Weisenstein, C. H. Jackman, G. Pitari, I. Köhler, R. Sausen, C. J. Weaver, A. R. Douglass, P. S. Connell, D. E. Kinnison, F. J. Dentener, E. L. Fleming, T. K. Berntsen, I. S.A. Isaksen, J. M. HaywoodB. Kärcher

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Abstract

An upper limit for aircraft-produced perturbations to aerosols and gaseous exhaust products in the upper troposphere and lower stratosphere (UT/LS) is derived using the 1992 aviation fuel tracer simulation performed by eleven global atmospheric models. Key findings are that subsonic aircraft emissions: 1) have not be responsible for the observed water vapor trends at 40°N; 2) could be a significant source of soot mass near 12 km, but not at 20 km, 3) might cause a noticeable increase in the background sulfate aerosol surface area and number densities (but not mass density) near the northern mid-latitude tropopause, and 4) could provide a global, annual mean top of the atmosphere radiative forcing up to +0.006 W/m2 and -0.013 W/m2 due to emitted soot and sulfur, respectively.

Original languageEnglish
Pages (from-to)3947-3950
Number of pages4
JournalGeophysical Research Letters
Volume25
Issue number21
DOIs
StatePublished - Nov 1 1998

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