Abstract
Increasing levels of air traffic have raised concerns about the potential effects of aircraft exhaust on the climate. Current knowledge is expanded by examining in situ data from 21 contrails sampled at altitudes of 9.3 - 12.5 km and temperatures of -47 deg C to -66 deg C. The airborne equipment allowed measurements of particles as small as 2 {mu}m in diameter, which have not previously been reported. The microphysical characteristics of the contrails, which occurred in both clear and cloudy air, are presented and compared with natural cirrus properties. Computations of the wavelength-dependent radiative properties of the sampled particle distributions are also presented and compared with laboratory measurements. Finally, implications of these findings for climatic assessment are discussed. (R.P.) 9 refs.
Poellot, M R;
[1]
Arnott, W P;
Hallett, J
[2]
- North Dakota Univ., Grand Forks, ND (United States)
- Nevada Univ., Reno, NV (United States). Desert Research Inst.
Citation Formats
Poellot, M R, Arnott, W P, and Hallett, J.
In situ observations of contrail micro-physics and implications for their radiative impact.
France: N. p.,
1997.
Web.
Poellot, M R, Arnott, W P, & Hallett, J.
In situ observations of contrail micro-physics and implications for their radiative impact.
France.
Poellot, M R, Arnott, W P, and Hallett, J.
1997.
"In situ observations of contrail micro-physics and implications for their radiative impact."
France.
@misc{etde_623626,
title = {In situ observations of contrail micro-physics and implications for their radiative impact}
author = {Poellot, M R, Arnott, W P, and Hallett, J}
abstractNote = {Increasing levels of air traffic have raised concerns about the potential effects of aircraft exhaust on the climate. Current knowledge is expanded by examining in situ data from 21 contrails sampled at altitudes of 9.3 - 12.5 km and temperatures of -47 deg C to -66 deg C. The airborne equipment allowed measurements of particles as small as 2 {mu}m in diameter, which have not previously been reported. The microphysical characteristics of the contrails, which occurred in both clear and cloudy air, are presented and compared with natural cirrus properties. Computations of the wavelength-dependent radiative properties of the sampled particle distributions are also presented and compared with laboratory measurements. Finally, implications of these findings for climatic assessment are discussed. (R.P.) 9 refs.}
place = {France}
year = {1997}
month = {Dec}
}
title = {In situ observations of contrail micro-physics and implications for their radiative impact}
author = {Poellot, M R, Arnott, W P, and Hallett, J}
abstractNote = {Increasing levels of air traffic have raised concerns about the potential effects of aircraft exhaust on the climate. Current knowledge is expanded by examining in situ data from 21 contrails sampled at altitudes of 9.3 - 12.5 km and temperatures of -47 deg C to -66 deg C. The airborne equipment allowed measurements of particles as small as 2 {mu}m in diameter, which have not previously been reported. The microphysical characteristics of the contrails, which occurred in both clear and cloudy air, are presented and compared with natural cirrus properties. Computations of the wavelength-dependent radiative properties of the sampled particle distributions are also presented and compared with laboratory measurements. Finally, implications of these findings for climatic assessment are discussed. (R.P.) 9 refs.}
place = {France}
year = {1997}
month = {Dec}
}